The Attorney Grievance Commission, acting through Bar Counsel, filed in this Court a Petition for Disciplinary Action, *503pursuant to Maryland Rule 16-709, alleging that Robert P. Thompson violated Maryland Rules of Professional Conduct 1.8 (Conflict of Interest) 1 1.1 (Competence)2, 1.15 (Safekeeping property)3, and 8.4(d) (Misconduct)4. Pursuant to Maryland Rule 16-752(a), we referred the matter to Judge M. Brooke Murdock of the Circuit Court for Baltimore City to make findings of fact and conclusions of law. Following an evidentiary hearing, Judge Murdock found by clear and convincing evidence that respondent had violated Rules 1.15 and 8.4(d).5 Judge Murdock made the following Findings of Fact and Conclusions of Law. (footnotes omitted).
*504“FINDINGS OF FACT AND CONCLUSIONS OF LAW INTRODUCTION
“The Attorney Grievance Commission of Maryland (‘Petitioner’), filed a Petition for Disciplinary Action pursuant to Md. Rule 16-709, alleging that Robert P. Thompson violated 1.8, 1.15, and 8.4(d) of the Maryland Rules of Professional Conduct (‘MRPC’). Pursuant to an Order from the Court of Appeals dated March 22, 2002, the Petition for disciplinary action was transmitted to this Court for a hearing, which was conducted on October 10, 2002. The Petitioner was represented by Dolores O. Ridgell, Robert Thompson represented himself.
“The parties stipulated to the admission of the bank records for the Estate of Ida Maye Redd (‘the Estate’), a spreadsheet summarizing the activity in the bank accounts, a certified copy of the Orphans’ Court file for the Estate, copies of various filings and the Orders in the Estate. Petitioner offered testimony of an expert, Allan Gibber, Esq., the transcript of the deposition of Gail Davis and other documentary evidence. Mr. Thompson testified in his own defense.
STANDARD OF PROOF
“Maryland Rule 16 — 710(d) provides that ‘the hearing of charges is governed by the same rules of law, evidence and procedure as are applicable to the trial of civil proceedings in equity. Factual findings shall be supported by clear and convincing evidence.’
“However, in establishing a defense, a Respondent need only prove factual matters, including the existence of mitigating circumstances, by a preponderance of the evidence. Attorney Grievance Comm’n v. Bakas, 322 Md. 603, 589 A.2d 52, modified, 323 Md. 395, 593 A.2d 1087 (1991); Attorney Grievance Comm’n v. Powell, 328 Md. 276, 614 A.2d 102 (1992).
*505FINDINGS OF FACT
“The Court finds that the following facts have been established by clear and convincing evidence.
“On November 16, 1978, Mr. Robert Thompson (‘Respondent’) was admitted to the Bar of the Court of Appeals of Maryland. From 1989 to 1993, he operated as a sole practitioner in Baltimore City. In August, 1993, Respondent began doing business as Thompson & Sugar, P.A.
TAXES
“During the tax years 1989 through 1993, Respondent employed one or more employees and withheld Federal and Maryland State taxes from the salaries of those employees. However, for the tax years 1989 through 1993, Respondent failed to maintain a separate account for the funds, hold the funds owed to the Federal and State governments in trust, or pay the State and Federal withholding taxes to the government, as due. Further, during the tax years 1989 through 1993, Respondent failed to file quarterly withholding tax reports as required in a timely manner for each quarter. The amount of the employee withholding taxes owed to the State of Maryland by Respondent for 1989-1993 was in excess of $11,000.
“Maryland Comptroller of the Treasury (‘Comptroller’) repeatedly notified Respondent of this obligation and requested that he remit the income taxes withheld from his employees. The Comptroller instituted a lien against Respondent and made other collection efforts. On October 27, 1998, the Comptroller informed the Petitioner of Respondent’s conduct. Prior to the institution of the disciplinary action, Respondent satisfied his Federal withholding tax liability. On July 26, 2002, he satisfied the State withholding tax obligation. Respondent’s present law firm has handled payroll taxes properly.
ESTATE OF IDA MAYE REDD
“Respondent drafted Ida May Redd’s will dated May 31, 1995 and a codicil to the will dated January 5, 1996. The *506codicil to Ms. Redd’s will named Robert Thompson, Respondent, and Geneva Davis, Ms. Redd’s sister, as personal representatives. On January 21,1996, Ms. Redd, a resident of Baltimore City, died. Having no children, Ms. Redd left bequests to her sister, nieces, nephews, stepsons and friends. Ms. Redd’s estate was valued at approximately $488,000, of which approximately $470,000 was held in bank and investment accounts. On February 7, 1996, Respondent filed a Petition for Probate of the Redd Estate. Respondent and Ms. Davis were appointed co-personal representatives of the Redd Estate. Ms. Davis was 70 or 71 at the time she was named co-personal representative. She had a degree in education and was a retired school teacher. She had no legal training. After her sister’s death, Ms. Davis sent all of Ms. Redd’s personal property to Georgia to be placed in storage.
“On February 8, 1996, Respondent and Ms. Davis traveled to various financial institutions to collect the estate assets. They opened an Estate account at First Fidelity/First Union Bank on February 8, from which both Respondent or Ms. Davis could make withdrawals. Respondent and Ms. Davis withdrew funds from Ms. Redd’s accounts at First Fidelity Bank and Signet Bank. Also, on February 8, 1996, a Provident Bank account, which was titled jointly in the names of the decedent and Ms. Davis, was closed. The balance in the Provident Bank account was $27,387.28. The Provident Bank records indicate Ms. Davis signed the debit slip and withdrew the entire balance. This account was not listed on the Information Report filed in the Orphans’ Court by Respondent and Ms. Davis on February 28, 1996.
“In February, 1996, Ms. Davis became ill and was diagnosed with pancreatic cancer. She was hospitalized until April, 1996, when she went to her daughter’s home. Ms. Davis was extremely weak and fed through a feeding tube. Ms. Gail Davis, her daughter, assisted her in making entries in the Estate check register. Ms. Gail Davis played no role in administrating the estate.
*507“On May 8, 1996, Respondent filed an inventory for the Estate. On May 31, 1996, at Respondent’s request, a check in the amount of $1,000 was sent to Respondent from the Estate account, to compensate him for travel expenses for a trip to Georgia. On June 1, 1996, Respondent traveled to Albany, Georgia, where he met with some of the heirs, including Geneva Davis, Gail Davis, Alma Noble, Melvin George, Kay McGee and Regina Johnson. Respondent gave out a copy of the Administration Account and had Ms. Davis begin to prepare the distribution checks. During the meeting, one of the heirs questioned Respondent about why she had not received a bracelet, one of the specific bequests in Ms. Redd’s will; and Respondent offered her $500 out of his commission in lieu of the bracelet. While preparing the distribution checks at the meeting, Ms. Davis became ill and returned home with her daughter and Respondent, where she finished writing the checks. On June 3,1996, Ms. Davis lapsed into a coma and died the following week.
“As a result, before taxes totaling $36,834.96 had been paid, Respondent distributed the assets of the Estate. After the distributions and expenses were paid, the assets in the Estate totaled $35,537.65. In order to recover enough of the Estate to pay the taxes, Respondent subsequently obtained judgments against the heirs, including Ms. Davis and her daughter, Gail Davis. As a result of the judgments, some of the heirs returned a portion of their shares; and some did not. The taxes could only be paid after Respondent returned $800 of the travel expenses he received for going to Georgia and collected some of the judgment against the heirs. As a result, some of her heirs received more than their share and some of her heirs received less than their share.
“After Respondent had returned to Maryland on June 2, 1996, he notified Ms. Davis’ daughter that he had overlooked one of the heirs. Respondent requested that Ms. Davis’ daughter prepare a check and send it to him in Maryland for his signature. This was done. Respondent *508held the Estate assets from 1996 until the taxes were paid in an account that did not pay interest.
“At the June 1, 1996 meeting, Respondent received a check from the Estate in the amount of $16,000 in payment of a Personal Representative’s commission fee, for which no authorization from the Orphans’ Court, as of that date, had been requested. On June 17, 1997, Respondent filed a Petition for Allowance of Personal Representative’s Commission, requesting approval of commissions in the amount of $18,669.74. Pursuant to the agreement of the co-personal representatives, Ms. Davis had received $2,000 and Respondent had received $16,669.74. On September 21, 1998, the Orphans’ Court denied the Petition, with leave to refile when administration of the Estate was completed. Respondent did not return the $16,000 commission he received on June 1, 1996 to the Estate. Subsequently, five years later, on October 3, 2002, the Orphans’ Court approved payment of the commission.
“Ms. Davis’ daughter called Respondent several times in December, 1996. Respondent did not return her calls. On January 8, 1997, Ms. Davis’ daughter wrote to Respondent and questioned him why her mother had been given a check for $101,101.40 when the accounting provided by Respondent showed a distribution of $124,726.73. Respondent did not answer the letter.
“On February 25, 1997, Ms. Davis’ daughter wrote again. No answer was received. Subsequently, Respondent requested that the daughter send him the bank statements she had relating to the Redd Estate bank accounts. She sent them on March 17,1997.
“During a telephone conversation in August, 1997, Respondent told Ms. Davis’ daughter that a mistake had been made with regard to the inheritance tax. On September 19, 1997, Respondent asked Ms. Davis’ daughter to prepare two checks, payable to the Register of Wills. Respondent explained that he needed these checks to replace the checks written to the Register of Wills on June 1,1996.
*509CONCLUSIONS OF LAW
“In the course of handling the payroll taxes and the Redd Estate, Respondent violated Rules 1.15, and 8.4(d) of the Maryland Rules of Professional Conduct. As to his handling of the payroll taxes, 1.15 was violated. Pursuant to §§ 10-817 and 10-906 of the Tax General Article of the Md. Ann Code, Respondent is required to withhold income taxes from his employees’ salaries and maintain them in a separate account in trust for the State. He failed to do so. He further violated his fiduciary duty to the State of Maryland when he did not promptly deliver to the State the funds Respondent had collected from his employees.
“With regard to the Redd Estate, Respondent violated Rules 1.15 and 8.4 He failed to file reports in a timely manner pursuant to §§ 7-301 and 7-305 Estates & Trust Art. Md.Code Ann. (1997 Repl.Vol.2000 Supp.). The first Estate accounting was filed only after the Orphans’ Court was forced to issue a Notice of Deficiency and a Show Cause Order. The Estate was not closed until 2002.
“Respondent failed to list the various accounts in which the Estate’s cash assets were maintained at the time of Ms. Redd’s death. The Inventory Report filed by Respondent listed only the Estate checking accounts. Furthermore, Respondent did not keep records concerning closed accounts.
“He failed to correct errors on his Accountings. For example, the $800 travel expense reported on the first accounting, which subsequently, was not allowed by the Orphans’ Court, was removed on the next accounting; but, the totals were not changed. Respondent failed to accurately calculate the various distributions owed to the heirs and failed to reserve enough to satisfy the tax obligations. Respondent’s miscalculations resulted in the Estate incurring collection cost, delayed the payment of the taxes and the closure of the Estate, and caused some heirs to receive less than the distribution to which they were entitled. The Estate taxes should have been paid at the time of the *510distribution. Page v. Comptroller of the Treasury, 270 Md. 725, 313 A.2d 691 (1974). Further, Respondent held the Estate assets from 1996 until the taxes were paid in an account that did not pay interest.
“Respondent failed to comply with his duty as personal representative of the Estate to report the joint account of Ms. Redd and her sister on the Accounting Information Report he filed in February, 1996. Even if, as Respondent testified, he did not know about the account until after the paperwork had been filed, he was required to file an amended report once he became aware of it.
“Without obtaining the prior approval of the Orphans’ Court as required by § 7-601 Estates & Trusts Article Md.Code Ann. (1997 Repl.Vol.2000 Supp.), Respondent received personal representative commissions from the Estate. Respondent did not return these funds even after his Petition for Allowance was denied on September 21, 1998 and again on May 27, 1999. Further, although he had been paid $1,000, Respondent reported on the Accounting a travel expense of $800. Even after the expense was disallowed by the Orphans’ Court, he failed to return these monies to the Estate.
“MRPC 1.15 requires that an attorney maintain complete records of account funds for the period of the representation and five years after termination of the representation. This was not done. Respondent relied on Ms. Davis, an ill and elderly sister of the decedent to maintain the records. Respondent and Ms. Davis, in February, 1996 went to at least three banks and closed accounts. No record was kept of those accounts. Further Respondent did not render a prompt and complete accounting of other accounts.
“MRPC 1.15 also requires that the property of the client shall be kept separately from the attorney’s. The $16,000 commission and the $1,000 for travel expenses, Respondent received, remained Estate assets until the payment of commissions was approved by the Orphans’ Court. Not until December, 2001 did Respondent return $800 of these funds to the Estate and only then because taxes had to be paid.
*511“MRPC 8.4(d) prohibits a lawyer from engaging in conduct which is prejudicial to the administration of justice. The Redd Estate was not promptly handled, and the taxes were not promptly paid due to Respondent’s [sic]. When it became apparent that the Estate assets would have to be reclaimed in order to satisfy its tax obligation, Respondent chose to obtain judgments rather than return a portion of the $16,000 commission he had prematurely received without Court approval.
“Therefore this Court finds by clear and convincing evidence that Respondent has violated Maryland Rules of Professional Conduct 1.15 and 8.4(d).”
Both parties have excepted to the hearing judge’s proposed conclusions of law.
II.
This Court has original jurisdiction over attorney discipline proceedings. See Attorney Grievance Comm’n v. Seiden, 373 Md. 409, 414, 818 A.2d 1108, 1111 (2003). In the exercise of our responsibility, we conduct an independent review of the record. Id. at 415, 818 A.2d at 1111. We accept the hearing judge’s findings of fact unless we determine that they are clearly erroneous. See Attorney Grievance Comm’n v. Garfield, 369 Md. 85, 97, 797 A.2d 757, 764 (2002). We review the conclusions of law essentially de novo. See Attorney Grievance Comm’n v. McLaughlin, 372 Md. 467, 493, 813 A.2d 1145, 1160 (2002).
We shall first address Bar Counsel’s exceptions. Bar Counsel contends that the hearing judge erred in failing to find that respondent violated Rule 1.1 in his handling of the Estate of Ida Maye Redd and in failing to find that respondent violated Rule 8.4(d) in his failing to withhold and pay employee withholding taxes. Bar Counsel also complains that although the Petition for Disciplinary Action alleged that respondent violated Rule 8.4(d) in connection with his failure to pay and withhold employee taxes, and the hearing judge concluded that respondent committed the misconduct, the judge did not *512include this misconduct in her opinion as a violation of the rule.
We turn first to Rule 1.1, Competence. Bar Counsel maintains that the hearing judge erred in not finding that Rule 1.1 was violated. Bar Counsel argues that Judge Murdock’s findings of fact support the conclusion that respondent did not provide competent representation.
Respondent suggests that he did not violate Rule 1.1 because there was no proof of any pattern of improperly handling estate matters and that the handling of one case, standing alone, does not support a finding of incompetency. He maintains that his conduct was more akin to a lack of thoroughness or preparation.
Respondent’s position is meritless. While he is correct that a single mistake does not necessarily result in a violation of Rule 1.1, and may constitute negligence but not misconduct under the rule, such is not the case before us. A simple review of respondent’s handling of this estate leads to the inescapable conclusion that he was incompetent.
Judge Murdock,found facts, by clear and convincing evidence, demonstrating that respondent’s handling of the estate of Redd was not competent. Respondent failed to file reports in a timely manner; filed the first accounting only after the issuance of a Notice of Deficiency and a show cause order; failed to list the various accounts in which estate assets were maintained at the time of the decedent’s death on the estate inventory and did not keep records of these accounts; failed to correct errors in his accountings; miscalculated the various distributions which caused the estate to incur collection costs and delayed payment of taxes and closure of the estate; caused some heirs to receive less than the distribution to which they were entitled; failed to pay the estate taxes at the time of distribution; paid himself a commission and travel expense reimbursement before approval by the Orphans’s Court; and held estate assets from 1996 until the taxes were paid in a non-interest bearing account. In addition, respondent did not report the joint account of decedent and her *513sister on the February 1996 information report and failed to file an amended information report when he became aware of the account.
Bar Counsel’s exception is sustained. Respondent’s actions demonstrated by clear and convincing evidence that he did not act competently in his handling of the estate of Ms. Redd. A pattern of misconduct is considered as an aggravating circumstance, see American Bar Association’s Standards for Imposing Lawyer’s Sanctions (1992), § 9.22 Aggravating Circumstances, and ordinarily is more relevant to the sanction than to the initial inquiry of whether a rule has been violated. Attorney Grievance Comm’n. v. Ficker, 319 Md. 305, 313, 572 A.2d 501, 505 (1990). In any case, respondent’s conduct is more than mere negligence. Although an isolated incident may be reflective of lack of diligence, oversight or confusion, in this case, respondent’s cumulative acts of misconduct within this same case are different from an isolated incident of neglect. Moreover, his actions resulted in harm to his client and the heirs.
Bar Counsel also excepts to the hearing judge’s failure to find that respondent’s failure to withhold and pay employee taxes constituted a violation of Rule 8.4(d), conduct prejudicial to the administration of justice. We agree with Bar Counsel and shall sustain the exception.
It was undisputed at the hearing before Judge Murdock that respondent employed one or more employees, withheld federal and state taxes from the employees’ salaries, and failed to maintain a separate account for the monies, hold the funds in trust, or pay the taxes to the governmental entities. It is also undisputed that he failed to file in a timely manner quarterly tax reports as required by law. He owed the State of Maryland in excess of $11,000.00 for employee withholding taxes for the period 1989-1993. The hearing judge’s findings of fact set forth in great detail the facts surrounding respondent’s failure to comply with the law regarding these taxes.
Respondent argues that his failure to withhold payroll taxes was due to his lack of knowledge as to how to run a business *514properly and that he was not aware that payroll taxes needed to be kept in a separate account. He claims that once the liability existed, he could not pay both previous tax liability and current employee withholding taxes. Essentially, respondent seems to be claiming that this is not a case of willful tax evasion and thus, not a violation of the rule.
Maryland Code (1957, 1997 Repl.Vol., 2002 Supp.) § 10-901 et seq. of the Tax-General Article sets out the duties of employers regarding employee withholding taxes. Included among those duties is the requirement that an employer withhold income tax from an employee, pay quarterly taxes and maintain a separate account for the withheld monies. See §§ 10-902, 10-906. Section 13-1007 provides that a willful failure to withhold taxes is a misdemeanor.6 The hearing *515judge made sufficient findings of fact to enable us to conclude, as a matter of law, that respondent’s conduct regarding the employee withholding taxes violated Rule 8.4(d).
Respondent’s “defense” that he did not have the money to pay the taxes or that he did not know that he was required to keep the money in a separate trust account is no defense at all. The hearing judge found that respondent had been notified repeatedly of his obligation. He knew of his legal duty to pay and he intentionally did not do so. This was not through accident, mistake or other innocent cause. Taxes are a known legal duty. Respondent was under an obligation to inform himself of his legal responsibilities. Ignorance of the law is not a defense. See Attorney Grievance Comm’n v. Stein, 373 Md. 531, 819 A.2d 372 (2003). Respondent did not pay his taxes. His explanation that he was inexperienced in business matters and did not know of his obligation or that he did not have the money does not excuse his conduct and does not make his conduct any less “willful.” He willfully failed to pay his taxes and thus, his conduct was prejudicial to the administration of justice. Respondent violated Rule 8.4(d) by not paying his employee withholding taxes.
Failure to pay taxes has been held to constitute a violation of Rule 8.4(d). See Attorney Grievance Comm’n v. Angst, 369 Md. 404, 800 A.2d 747 (2002); Attorney Grievance Comm’n v. Clark, 363 Md. 169, 767 A.2d 865 (2001); Attorney Grievance Comm’n v. Atkinson, 357 Md. 646, 745 A.2d 1086 (2000); Attorney Grievance Comm’n v. Post, 350 Md. 85, 710 A.2d 935 (1998); Attorney Grievance Comm’n v. Baldwin, 308 Md. 397, 519 A.2d 1291 (1987); Attorney Grievance Comm’n v. Gilland, 293 Md. 316, 443 A.2d 603 (1982).
We next address respondent’s exceptions. Respondent first excepts to the finding that he violated Rule 1.15 both in regards to the record keeping of the estate of Ida Maye Redd *516and by not keeping the $16,000.00 estate commission separate from his other funds. Respondent maintains that the hearing judge erred in finding that he failed to keep estate records for the requisite five years because the co-personal representative, Geneva Davis,7 maintained the bank records and kept them in her home in Georgia. He argues that he presented facts at the hearing that proved at least by a preponderance of the evidence that records of the account were maintained throughout the course of the administration.
Judge Murdock found that respondent and the co-personal representative, Ms. Davis, in February, 1996, went to at least three banks and closed accounts and that no record was kept of those accounts. In addition, the hearing judge found that respondent did not render a prompt and complete accounting of other accounts.
Judge Murdock’s findings are supported by clear and convincing evidence. In addition to the testimony and depositions received into evidence at the hearing, the parties entered into stipulated findings of facts. The stipulation reflects as follows:
¶ 14. On or about February 8, 1996, the Respondent and Geneva Davis traveled to various financial institutions to collect the estate assets. They opened an Estate account at First Fidelity Bank/First Union Bank that same day. Either Respondent or Geneva Davis could write checks on the Estate Account.
¶ 15. Provident Bank was one of the financial institutions from which funds were withdrawn by the Respondent and Ms. Davis on February 8, 1996. Funds were also withdrawn from accounts located at First Fidelity Bank and Signet Bank.
¶ 16. On February 8,1996, a Provident Bank account which was titled jointly in the names of Ida M. Redd and Geneva W. Davis was closed. The balance in this account on *517February 8, 1996, was $27,387.28. The Provident Bank records indicate Geneva W. Davis signed the debit slip and removed the entire balance on February 28, 1996. This account was not listed on the Information Report filed in the Orphans’ Court by Respondent and Geneva Davis on February 28, 1996. Respondent contends that he was not aware of this joint account in February 1996.
Respondent testified before the hearing court that “[tjhese are the records that I can find at this time.” The hearing judge found that there were no records of closed accounts.
Based on our independent review of the record, we find ample support for the hearing judge’s findings of fact. Judge Murdock was not clearly erroneous in concluding that respondent, who was present when the funds were withdrawn from Provident Bank, had knowledge of the joint account and that it was not listed in the Information Report with the Orphans’ Court. She was not clearly erroneous in finding that respondent did not fulfill his obligation to keep records of the estate for at least five years. We reject respondent’s excuse that because he relied upon Geneva Davis to keep the records, he was therefore not responsible for maintaining the records for the required period of time. The duty to retain the records remained on respondent as the attorney for the estate, and he cannot escape responsibility for his statutory obligation by shifting it to another person.
Respondent excepts to the finding that his handling of the Redd estate violated Rule 8.4(d). He excepts to the hearing judge’s finding that he violated Rule 1.15 requiring him to keep property of a client separately from the funds of the attorney. Respondent explains that he did not violate any rule by depositing the $16,000.00 into his personal account because the auditor from the Registrar of Wills told him to list the commission check as “reserved pending final accounting.”
Pursuant to the stipulated agreed facts, respondent received a check in the amount of $16,000.00 from the Redd estate representing his Personal Representative commission. He deposited this check in his personal account and not the estate account. Respondent was not entitled to his commission until *518approved by the Orphans’ Court.8 Until the court approved the fee, the $16,000.00 belonged to the estate. While the money belonged to the estate, respondent was required to keep it in a separate account. By co-mingling the money with other accounts, respondent violated Rule 1.15(a).
Finally, in some convoluted explanation, respondent excepts to the hearing judge’s ruling that he violated 8.4(d). He asserts that at no time did he engage in conduct that was prejudicial to the administration of justice because the heirs signed a release agreeing to hold the estate and personal representative harmless from liability resulting from an early distribution of the estate; that the miscalculation of the amount of taxes due on the estate was the result of an erroneous but good faith belief as to how the will was to be interpreted; that the incorrect first account which was rejected by the Orphans’ Court was corrected and subsequently approved; that the court ultimately approved the commissions which had been distributed in June, 1996; and that the funds were distributed early to the heirs because they constantly were calling the co-personal representative, who was seriously ill.
We overrule respondent’s exception. As we have previously indicated, he violated Rule 8.4(d) by failing to follow the law *519with regard to employee withholding taxes. In addition, he violated Rule 8.4(d) by improperly handling the Redd estate, ie., improperly distributing the assets, not paying inheritance taxes before distributing the assets, suing the heirs, distributing less than the heirs were entitled to under the will, and then, to add insult to injury, retaining the $16,000.00 commission.
III.
We turn now to the sanction. The purpose of sanctions in attorney grievance matters is not to punish the attorney but to prevent other attorneys from violating the Rules of Professional Conduct and to maintain the integrity of the legal profession. See Attorney Grievance Comm’n v. Angst, 869 Md. 404, 416, 800 A.2d 747, 754-55 (2002). The appropriate sanction to be imposed depends upon the particular facts and circumstances of each case. See Attorney Grievance Comm’n v. McClain, 373 Md. 196, 211, 817 A.2d 218, 227 (2003). In McClain, writing for the Court, Chief Judge Bell explained some of the considerations in regard to the sanction. He wrote:
“Relevant to the sanction decision is ‘the nature and gravity of the violations and the intent with which they were committed.’ Likewise relevant are the attorney’s prior grievance history, whether there have been prior disciplinary proceedings, the nature of the misconduct involved in those proceedings and the nature of any sanctions imposed, as well as any facts in mitigation, the attorney’s remorse for the misconduct, and the likelihood of the conduct being repeated. As to the latter, we have held that an attorney’s voluntary termination of the charged misconduct, when accompanied by an appreciation of the serious impropriety of that past conduct and remorse for it, may be evidence that the attorney will not again engage in such misconduct.”
Id. at 211-12, 817 A.2d at 227-28 (citations omitted).
Bar Counsel recommends that respondent be suspended indefinitely with the right to reapply for reinstatement no *520sooner than three years from the date of suspension. Respondent suggests that, at most, a reprimand is appropriate.
Respondent has violated Rules 1.1, 1.15, and 8.4(d). In the estate matter, respondent failed to hold estate assets in trust, resulting in harm to the heirs. He received commission payments and travel expenses from the estate without prior approval of the Orphans’ Court, did not pay the estate taxes promptly and chose to obtain judgments against the heirs rather than return any part of his commission which he took prematurely. He violated federal and state tax laws by failing to pay withholding taxes and failing to hold the money in trust for the employee.
In mitigation, respondent represents that, in 1998, he ceased operating as a sole proprietor and has set up a professional association known as Thompson and Sugar, P.A. Since changing his professional status, he has paid all back federal and state taxes and he is current with all tax liabilities. He further avers that his failure to pay the taxes was out of ignorance and was not fraudulent. As to the handling of the estate, while he disputes the finding of incompetency, he concedes that he made certain mistakes, but maintains that there is no evidence that he has a pattern of incompetently handling estates.
This Court has stated that “the gravity of misconduct is not measured solely by the number of rules broken but is determined largely by the lawyer’s conduct.” Attorney Grievance Comm’n v. Briscoe, 357 Md. 554, 568, 745 A.2d 1037, 1044 (2000) (quoting Attorney Grievance Comm’n v. Milliken, 348 Md. 486, 519, 704 A.2d 1225, 1241 (1998)). In order to accomplish our goal to protect the public and to deter other lawyers from engaging in similar misconduct, we also look to our past cases involving attorney discipline.
Violations of Rules 1.15 and 8.4, through misappropriation and commingling of estate moneys, have warranted both suspension and disbarment in prior cases before this Court. See e.g. Attorney Grievance Comm’n v. Seiden, 373 Md. 409, 818 A.2d 1108 (2003) (imposing suspension with leave to reapply in *521thirty days for taking a fee without the permission of the Orphan’s Court); Attorney Grievance Comm’n v. Sullivan, 369 Md. 650, 801 A.2d 1077 (2002) (disbarring attorney who, as personal representative, took funds from the estate without approval of the Orphans’ Court); Attorney Grievance Comm’n v. Sachse, 345 Md. 578, 693 A.2d 806 (1997) (suspending attorney indefinitely with leave to reapply in one year for mishandling a trust fund created by will); Attorney Grievance Comm’n v. Owrutsky, 322 Md. 334, 587 A.2d 511 (1991) (suspending attorney for three years for mishandling client funds as attorney in fact and misconduct during service as personal representative).
Likewise, this Court has found disbarment or suspension warranted for attorneys who failed to timely file federal and state income taxes. See e.g. Attorney Grievance Comm’n v. Clark, 363 Md. 169, 767 A.2d 865 (2001) (imposing indefinite suspension with immediate right to reapply provided a showing by the attorney of good standing with respect to his tax obligations); Attorney Grievance Comm’n v. Atkinson, 357 Md. 646, 745 A.2d 1086 (2000) (suspending attorney indefinitely with right to reapply after one year for failing to file income tax returns); Attorney Grievance Comm’n v. Casalino, 335 Md. 446, 644 A.2d 43 (1994) (disbarring attorney for willful tax evasion); Attorney Grievance Comm’n v. Baldwin, 308 Md. 397, 519 A.2d 1291 (1987) (suspending attorney for eighteen months for failure to file withholding tax returns for employees); Attorney Grievance Comm’n v. Gilland, 293 Md. 316, 443 A.2d 603 (1982) (suspending attorney for two years for willful failure to file federal income taxes); Maryland St. Bar Ass’n v. Callanan, 271 Md. 554, 318 A.2d 809 (1974) (disbarring attorney for federal criminal conviction of willful tax evasion).
We find several mitigating factors are present. We have not been advised by either party whether respondent has any prior disciplinary matters, and thus, we shall assume that this is his first violation. With respect to the tax matters, there has been no finding of a fraudulent intent. Respondent paid his federal employee withholding tax liability before the mat*522ter came to the attention of the Attorney Grievance Commission and has been current in his taxes since 1993. In addition, respondent appears to have cooperated with Bar Counsel throughout the investigation.
Weighing all of these factors, we conclude that the appropriate sanction is an indefinite suspension with the right to reapply after the expiration of one year. It is hereby ordered that:
1. Respondent, Robert P. Thompson, is indefinitely suspended from the practice of law in Maryland with the right to reapply after the expiration of one year, said suspension to commence thirty (30) days from the date of entry of this Opinion and Order.
2. Respondent is directed to pay all costs associated with these disciplinary proceedings as taxed by the Clerk of this Court.
IT IS SO ORDERED; RESPONDENT SHALL PAY ALL COSTS AS TAXED BY THE CLERK OF THIS COURT, INCLUDING COSTS OF ALL TRANSCRIPTS, PURSUANT TO MARYLAND RULE 16-761, FOR WHICH SUM JUDGMENT IS ENTERED IN FAVOR OF THE ATTORNEY GRIEVANCE COMMISSION OF MARYLAND AGAINST ROBERT P. THOMPSON.
. Rule 1.8. Conflict of Interest: Prohibited Transactions
"(h) A lawyer shall not make an agreement prospectively limiting the lawyer’s liability to a client for malpractice unless permitted by law and the client is independently represented in making the agreement, or settle a claim for such liability with an unrepresented client or former client without first advising that person in writing that independent representation is appropriate in connection therewith.”
. Rule 1.1. Competence
"A lawyer shall provide competent representation to a client. Competent representation requires the legal knowledge, skill, thoroughness and preparation reasonably necessary for the representation.”
. Rule 1.15. Safekeeping property
"(a) A lawyer shall hold property of clients or third persons that is in a lawyer’s possession in connection with a representation separate from the lawyer’s own property. Funds shall be kept in a separate account maintained pursuant to Title 16, Chapter 600 of the Maryland Rules. Other property shall be identified as such and appropriately safeguarded. Complete records of such account funds and of other property shall be kept by the lawyer and shall be preserved for a period of five years after the termination of the representation. "(b)Upon receiving funds or other property in which a client or third person has an interest, a lawyer shall promptly notify the client or third person. Except as stated in this Rule or otherwise permitted by law or by agreement with the client, a lawyer shall promptly deliver to the client or third person any funds or other property that the client or third person is entitled to receive and, upon request by the client or third person, shall promptly render a full accounting regarding such property.”
. Rule 8.4. Misconduct
"It is professional misconduct for a lawyer to: "(d) engage in conduct that is prejudicial to the administration of justice; ...”
. Bar Counsel dismissed the allegation of a violation of Rule 1.8 (Conflict of Interest) at the hearing before Judge Murdock.
. In Deibler v. State, 365 Md. 185, 776 A.2d 657 (2001), Judge Wilner, writing for the Court, discussed the various meanings which courts have ascribed to the term “willful”:
" ‘[WjillfuT has received four different constructions from the courts. The first, and most restrictive, is that an act is willful only if it is done with a bad purpose or evil motive — deliberately to violate the law. A second interpretation considers an act to be willful 'if it is done with an intent to commit the act and with a knowledge that the act is in violation of the law.’ That construction does not require that the defendant possess a sinister motivation, but, like the first interpretation, it does require knowledge that the act is unlawful. The third interpretation 'requires only that the act be committed voluntarily and intentionally as opposed to one that is committed through inadvertence, accident, or ordinary negligence.’ Under that approach, 'as long as there is an intent to commit the act, there can be a finding of willfulness even though the actor was consciously attempting to comply with the law and was acting with the good faith belief that the action was lawful.’ What is required is 'an objective intent to commit the act but not necessarily a knowledge that the act will bring about the illegal result.’ Finally, ... some courts have gone so far as to find an act willful even though it was not committed intentionally, but through oversight, inadvertence, or negligence.”
Id. at 192-93, 776 A.2d at 661 (quoting S. Brogan, An Analysis of the Term "Willful" in Federal Criminal Statutes, 51 Notre Dame L.Rev. 786 (1976)). Judge Wilner noted that in the majority of applications, this Court utilized the third definition, i.e., that the act be committed voluntarily and intentionally, and not accidently. Id. at 195, 776 A.2d at 663. Likewise, in attorney grievance matters based on the willful failure to file tax returns, this Court has defined willfulness as the "voluntary, intentional violation of a known legal duty not requiring a *515deceitful or fraudulent motive.” Attorney Grievance Comm’n v. Boyd, 333 Md. 298, 309, 635 A.2d 382, 387 (1994); Attorney Grievance Comm’n. v. Walman, 280 Md. 453, 460, 374 A.2d 354, 359 (1977).
. Geneva Davis, the co-personal representative of the estate, died in June 1996, and respondent then became the sole personal representative of the Redd estate. Following her death, respondent was dealing with Ms. Davis' daughter, Gayle Davis, who told respondent that she would find the records kept by Geneva Davis.
. The procedure for compensation for an attorney or the personal representative is set out in Maryland Code (1957, 2001 Repl.Vol., 2002 Supp.) § 7-601 et seq. of the Estates and Trusts Article. Section 7-602 provides as follows:
"(a) General. — An attorney is entitled to reasonable compensation for legal services rendered by him to the estate and/or the personal representative.
“(b) Petition. — Upon the filing of a petition in reasonable detail by the personal representative or the attorney, the court may allow a counsel fee to an attorney employed by the personal representative for legal services. The compensation shall be fair and reasonable in the light of all the circumstances to be considered in fixing the fee of an attorney.
"(c) Considered with commissions. — If the court shall allow a counsel fee to one or more attorneys, it shall take into consideration in making its determination, what would be a fair and reasonable total charge for the cost of administering the estate under this article, and it shall not allow aggregate compensation in excess of that figure.”