Plaintiffs American Tierra Corporation, Arnold Development Co., Brighton Builders, Inc., R & D Engineers, Inc., and Cove-crest Properties (collectively “the subdivid-ers”) appeal from the trial court’s grant of partial summary judgment in favor of defendant City of West Jordan.
This action is part of a second generation of litigation arising from a series of cases decided in Call v. City of West Jordan, 606 P.2d 217 (Utah 1979) (Call I), on rehearing, 614 P.2d 1257 (Utah 1980) (Call II), following remand, 727 P.2d 180 (Utah 1986) (Call III), following remand, 788 P.2d 1049 (Utah Ct.App.1990) (Call IV), cert. denied, 800 P.2d 1105 (Utah 1990). The cases arise out of a 1975 amendment to West Jordan’s ordinance No. 33. The amendment required subdividers to dedicate seven percent of their land to West Jordan or, at the option of the city, pay the equivalent value as an impact fee to be used for flood control and/or parks and recreation facilities. West Jordan, Utah, Ordinance 33, § 9-C-8(a) (1975).1
In November 1977, an attorney from the offices of Robert J. DeBry sent a letter to the West Jordan mayor and city council on behalf of two subdividers, John Call and Clark Jenkins, and “all others similarly situated who have been required to dedicate land or pay cash to the City of West Jordan" under ordinance No. 33. The letter demanded that “all such land and/or cash be returned” because the ordinance is invalid. Failing such a return, the letter stated, “Mr. Call and Mr. Jenkins have authorized [DeBry’s] office to file a class action lawsuit for the return of such land and/or cash.” West Jordan received the letter but declined to return the cash and property.
On February 7,1978, DeBry’s office filed a class action complaint in district court against West Jordan for the return of the impact fees. The complaint asserted that ordinance No. 33 was invalid and designated the class as “all persons, partnerships, businesses, and corporations which have, or will be required, to either dedicate seven percent (7%) of the land area of their proposed subdivision, or the equivalent value in cash to [West Jordan] in accordance with Ordinance No. 33.” In April 1978, the district court denied class certification. In 1986, after a series of proceedings including appeals to and remands from this court, we declared ordinance No. 33 invalid and void ab initio and upheld the trial court’s denial of class action status. Call III, 727 P.2d at 183-84. Subsequently, on November 5, 1987, the trial court awarded Call and Jenkins judgment for a refund of their impact fees plus interest. That judgment was not disturbed by the Utah Court of Appeals in Call IV, 788 P.2d at 1050-51.
Between 1975 and 1978, the individual plaintiffs in the present action paid the fees for which they now seek a refund. On November 24, 1987, American Tierra Corporation, Arnold Development Company, Covecrest Properties, and Brighton Builders, Inc., each filed a complaint in district court alleging that because ordinance No. 33 is void, they are entitled to a refund of impact fees paid to West Jordan. On July 19, 1988, R & D Engineers, Inc., filed a similar complaint. The trial court consolidated the cases.
West Jordan moved for summary judgment, claiming that the subdividers’ complaints are barred by various statutes of limitation and “similar procedural defects.” The subdividers filed a cross-motion for summary judgment on the statute of limi*759tation issue. They also filed a separate motion for summary judgment on other issues, contending that West Jordan’s affirmative defenses of mistake, estoppel, waiver, laches, and unjust enrichment are, as a matter of law, without merit. The trial court granted West Jordan’s motion for summary judgment, concluding that the subdividers (1) failed to file a notice of claim pursuant to the Utah Governmental Immunity Act within ninety days after their causes of action arose, and (2) failed to file their litigation within a one-year statute of limitation period after their cause of action arose. The trial judge also denied the subdividers’ cross-motion for summary judgment and their motion for summary judgment on the affirmative defenses. The subdividers have now appealed.
In this appeal, we address two questions of law: (1) whether the Utah Governmental Immunity Act applies to the facts of this case, and (2) what statute of limitation applies and whether it expired before the subdividers filed their complaints. We accord no deference to the legal conclusions the trial court gave to support its grant of summary judgment. City of Monticello v. Christensen, 788 P.2d 513, 516 (Utah), cert. denied, — U.S. -, 111 S.Ct. 120, 112 L.Ed.2d 89 (1990).
APPLICABILITY OF THE UTAH GOVERNMENTAL IMMUNITY ACT
Initially, West Jordan argues that the subdividers’ action is barred by their failure to comply with the provisions of the Utah Governmental Immunity Act.2 The Act sets time limits within which a notice of claim and an action itself may be filed against a governmental entity. Utah Code Ann. §§ 63-30-13 to -15 (1989).3 West Jordan asserts that the subdividers never filed their own notice of claim with the city. In response, the subdividers assert that they did not need to file such a notice because their claim for a refund of fees paid to West Jordan is equitable and therefore exempt from the notice requirements of the Utah Governmental Immunity Act.
This court long has recognized a common law exception to governmental immunity for equitable claims. El Rancho Enterprises, Inc. v. Murray City Corp., 565 P.2d 778, 779 (Utah 1977) (citing Auerbach v. Salt Lake County, 23 Utah 103, 63 P. 907 (1901)). Neither the passage of time nor the enactment of the Utah Governmental Immunity Act has eroded this exception. El Rancho, 565 P.2d at 780; Jenkins v. Swan, 675 P.2d 1145, 1154 (Utah 1983). Therefore, in this case we face the question whether the claim sounds in law or equity.
If the fee imposed under ordinance No. 33 were a tax, the equitable nature of this claim would be clear. Taxpayers’ actions generally are governed by equitable principles. 74 Am.Jur.2d Taxpayers Actions § 2, at 185 (1974). Taxpayers who are compelled to pay an illegal levy are specially damaged by the increase of the burden they are forced to bear, giving them an interest distinct from that of the general public. That interest entitles them to equitable relief. Id. § 14, at 205-06.
This court has previously held that for the purpose of determining the validity of *760ordinance No. 33, the fee imposed under the ordinance is not strictly speaking a “tax.” See Call I, 606 P.2d at 220-21. Nevertheless, for the purpose of determining whether the remedy sought is equitable in nature and whether the Utah Governmental Immunity Act applies, we conclude that the fee is analogous to a tax. Special assessments are very like taxes in terms of the burdens imposed on those assessed, and it makes sense to treat actions for their recovery as we would treat a taxpayer action.
Furthermore, this court already has recognized that an action to recover unlawful charges for city services is equitable in nature. See El Rancho, 565 P.2d at 779-80. The instant case similarly involves an action by private parties against a governmental entity to recover public revenues involuntarily paid and unlawfully collected. Accordingly, we hold that the subdividers’ claims for fees paid under ordinance No. 33 are equitable and therefore exempt from the filing requirements and time limits imposed by the Utah Governmental Immunity Act. As a matter of law, the trial court incorrectly concluded that West Jordan was entitled to summary judgment because the subdividers did not comply with the time limits prescribed in Utah Code Ann. §§ 63-30-13 to -15 (1989).
STATUTES OF LIMITATION
Having concluded that the subdivid-ers’ claims are equitable and not barred for failure to comply with the Utah Governmental Immunity Act, we must determine whether they are nonetheless barred by a statute of limitation. Historically, courts of equity were not bound by statutes of limitation. See, e.g., Patterson v. Hewitt, 195 U.S. 309, 317, 25 S.Ct. 35, 36, 49 L.Ed. 214 (1904). Today, however, many jurisdictions have commingled legal and equitable remedies in one form of action. In these jurisdictions, “the applicability of statutes of limitation to equitable proceedings appears to be unquestioned.” 27 Am.Jur.2d Equity § 157, at 693 (1966). Utah is one of those jurisdictions that long ago commingled legal and equitable actions. See Borland v. Chandler, 733 P.2d 144, 146 (Utah 1987) (citing Utah R.Civ.P. 2). Moreover, years before Utah merged its legal and equitable systems, Utah applied statutes of limitation to equitable actions. See, e.g., Fullerton v. Bailey, 17 Utah 85, 53 P. 1020 (1898). We therefore must determine which statute of limitation applies to this action.
Frequently, actions in equity are held to come within the scope of the statutory provision that establishes a time limit applicable to all causes of action for which a specific limit is not otherwise provided. 27 Am.Jur.2d Equity § 157, at 693 (1966). Utah’s catch-all provision places a four-year limitation period on actions “not otherwise provided for by law.” Utah Code Ann. § 78-12-25(3).
This court previously has applied the predecessor of section 78-12-25(3) to equitable actions. For instance, in Branting v. Salt Lake City, 47 Utah 296, 153 P. 995 (Utah 1915), the plaintiff brought an equitable action seeking nullification of a municipal ordinance that ordered the construction of a sewer and the assessment of a special tax on abutting property. 153 P. at 996, As a defense, the city interposed section 2833 of the Compiled Laws of 1907, which required, “An action for relief not hereinbefore provided for must be commenced within four years after the cause of action shall have accrued.” 153 P. at 1000. We concluded that section 2833 applied to all actions, both legal and equitable, in which affirmative relief is sought. Because more than four years had elapsed since the claim accrued, the catch-all provision barred the claim. See 153 P. at 1001; accord Fullerton v. Bailey, 17 Utah at 93, 53 P. 1020. Again, in Brown v. Cleverly, 93 Utah 54, 70 P.2d 881 (1937), we applied Utah’s four-year catch-all statute of limitation to preclude a claim for an equitable lien. 70 P.2d at 885. Before applying the catch-all statute to this case, however, we must satisfy ourselves that Utah’s current statutes of limitation do not contain a more specific provision that should cover the instant case.
Defendants urge us to apply the six-month limitation period found in Utah Code *761Ann. § 78-12-31. But this statute applies by its terms only to an action for a refund of monies paid to an officer acting as a tax collector. We concluded in Ponderosa One Ltd. Partnership v. Salt Lake City Suburban Sanitary District, 738 P.2d 635, 637 (Utah 1987), that section 78-12-31 did not apply to a claim for a refund of fees when those fees were not, strictly speaking, a tax. Although for equitable purposes the fee at issue in this case may resemble a tax, we have already held that it is not technically a tax. See Call I, 606 P.2d at 220-21. Thus the six-month period does not apply.
Defendants next urge us to apply the one-year limitation period found in Utah Code Ann. § 78-12-30. By its terms, this period begins to run only after a claim against a municipality has been “rejected by the board of county commissioners, city commissioners, city council or board of trustees, as the case may be.” West Jordan admits that the subdividers never presented their claims to the West Jordan city council. Indeed, we have held earlier in this opinion that the subdividers were under no obligation to file any notice of claim with West Jordan before commencing this equitable action in district court. Thus, the one-year period of section 78-12-30 cannot apply.
Defendants then urge us to apply the three-year limitation period found in Utah Code Ann. § 78-12-26. We hesitate, however, to view this action as “an action for taking, detaining, or injuring personal property,” Utah Code Ann. § 78-12-26(2), and we fail to see how any of the other provisions in section 78-12-26 apply to this case. We also note that precedent and sound policy suggest that we adopt the lengthier period when choosing between several possibly ambiguous statutes. See Juab County Dep’t of Public Welfare v. Summers, 19 Utah 2d 49, 426 P.2d 1, 3 (1967). Thus we are not persuaded that this action can properly be construed to be within the terms of the three-year statute of limitation.
We can find no sound basis for adopting any of the above statutes of limitation other than the four-year statute. Therefore, in light of the above-referenced principle that actions in equity frequently are governed by a state’s catch-all limitation statute, and in light of the Utah precedents that have applied our four-year catch-all statute to equitable actions, we are persuaded that the four-year limitation currently prescribed by Utah Code Ann. § 78-12-25(3) is the proper limitation period in this action.
We must next determine whether the four-year period had expired prior to commencement of this action. This first requires a determination of when the period began to run. Plaintiffs argue that the limitation period commenced as of July 23, 1986, the date this court, in Call III, held ordinance No. 33 void ab initio. The correct view, however, is that the limitation period begins to run as of the date on which the action could have been maintained to a successful conclusion. 51 Am. Jur.2d Limitation of Actions § 107, at 679 (1970). A right of action accrues when a wrong has been incurred that gives a right to bring and sustain a suit. Id. at 680. In this case, there is no dispute that such a right arose when the subdividers paid their impact fees between 1975 and 1978. Since this action was not commenced until 1988, it appears that the four-year period would have expired for any claims arising between 1975 and 1978.
The subdividers argue, however, that any statute of limitation was tolled until this court ruled in Call III on the question of class certification. We agree.4 *762“The commencement of a class action suspends the applicable statute of limitations as to all asserted members of the class who would have been parties had the suit been permitted to continue as a class action.” 54 C.J.S. Limitations of Actions § 234, at 311 (1987). This principle is firmly established in federal law. See Crown, Cork & Seal Co. v. Parker, 462 U.S. 345, 103 S.Ct. 2392, 76 L.Ed.2d 628 (1983); American Pipe & Constr. Co. v. Utah, 414 U.S. 538, 94 S.Ct. 756, 38 L.Ed.2d 713 (1974). As American Pipe and Crown, Cork & Seal explain, as long as the purported class is representative of all claims such that the defendant has adequate notice, then tolling serves to avoid duplication of litigation, promote justice, do equity, and generally further the judicial efficiency and economy that class actions are designed to promote. See 462 U.S. at 350-51, 103 S.Ct. at 2395-96; 414 U.S. at 553-55, 94 S.Ct. at 766-67. We now adopt the same rule as a matter of Utah law and hold that the commencement of a class action tolls the statute of limitation as to all putative class members who would have been parties had class certification been approved.
A further question, however, is how long this tolling effect continues. West Jordan argues that any tolling effect lasts only until the trial court resolves the class certification issue. The subdividers argue that the tolling effect continues during the appeal of the class certification question. American Pipe and Crown, Cork & Seal left this issue unclear as a matter of federal law. See Byrd v. Travenol Laboratories, Inc., 675 F.Supp. 342, 347 (N.D.Miss.1987). Several lower federal courts have since addressed this issue, uniformly concluding that the rationale for tolling continues throughout the pendency of the appeal. See, e.g., Jimenez v. Weinberger, 523 F.2d 689, 696 (7th Cir.1975); West Haven School Dist. v. Owens-Corning Fiberglas Corp., 721 F.Supp. 1547, 1555 (D.Conn.1988); Byrd, 675 F.Supp. at 347; Davis v. Bethlehem Steel Corp., 600 F.Supp. 1312, 1316 (D.Md.1985). See generally 54 C.J.S. Limitations of Actions § 122, at 165 (1987) (“[LJimitations will not run until the final disposition of the appeal.”). We agree with the federal interpretations and conclude as a matter of Utah law that when a proper appeal of a class certification decision is taken, the tolling benefit continues on behalf of all members of the class until the class issue is finally determined by the decision on appeal.
There is no dispute in this case that the subdividers were members of the putative class in- Call. The filing of the class action on February 7, 1978, therefore tolled the four-year statute of limitation with respect to the subdividers. The tolling effect continued until July 23, 1986, the date on which this court in Call III made final the denial of class certification.
Having determined that the four-year limitation period of Utah Code Ann. § 78-12-25(3) was tolled from February 7, 1978, to July 23, 1986, we must next determine whether any of the claims before us in this consolidated action were timely. Although the record before us does not contain the exact dates on which each of the subdivid-*763ers paid the contested fees and thereby created each cause of action, nonetheless, the record is adequate for us to . conclude that all claims except that of subdivider R & D Engineers, Inc., were timely.5
R & D Engineers’ claim arose from fees paid sometime in June of 1975. Assuming the fees were paid on the last day of June (the most advantageous assumption for R & D), then as of February 7, 1978, when the class action tolled the four-year limitation period, two years, seven months, and seven days would have run against R & D’s claim. The clock recommenced running on July 23, 1986, and ran until R & D filed its claim in the instant case on July 19, 1988, a period three days shy of two years. Added together, the time before the tolling started and the time after the tolling ceased is more than seven months over the four-year limit. The claim of R & D Engineers is thus barred, and we affirm the summary judgment against this claim.
Of the remaining claims, the earliest cause of action arose from fees paid by Arnold Development in November of 1976. Even assuming these fees were paid on the first day of November (the least advantageous assumption for Arnold Development), only one year, three months, and seven days had run against the claim as of the time the statute was tolled on February 7, 1978. As of that date, all other remaining claims had consumed even less of the four-year period. The four-year period then remained tolled until July 23, 1986. One year, four months, and one day later, on November 24, 1987, all the subdividers in this case other than R & D Engineers filed their claims in district court. Added together, for all claims other than R & D’s, the time before tolling began and the time after tolling ceased is at most two years, seven months, and eight days, well within the four-year limit. These claims, therefore, were not barred. We reverse the district court’s grant of summary judgment against Arnold Development Co., American Tierra Corp., Brighton Builders, Inc., and Covecrest Properties, and we remand these claims to the district court for further proceedings.
For purposes of the remand, however, we note that relief in equity may yet be denied on the ground of a plaintiff’s laches even when a statute of limitation is not a bar. The doctrine of laches may apply in equity, whether or not a statute of limitation also applies and whether or not an applicable statute of limitation has been satisfied. See 27 Am.Jur.2d Equity § 157, at 693 (1966). That question will require resolution by the trial court.
The subdividers also have asked us to review the district court’s denial of their motion for summary judgment regarding West Jordan’s affirmative defenses. This we decline to do. The district court’s denial of the subdividers’ motion for summary judgment was part of its grant of West Jordan’s summary judgment motion. In the context of determining to grant West Jordan’s motion, the district court was under no obligation to consider the merits of the subdividers’ motion, and it made no findings regarding their motion. It is therefore inappropriate for us to consider the merits of this motion. On remand, the subdividers, of course, may renew these arguments before the district court.
*764Affirmed as to the claim of plaintiff R & D Engineers, Inc.; reversed and remanded as to the claims of all other plaintiffs.
STEWART and ZIMMERMAN, JJ., concur.. Where this opinion refers to "fees,” “assessments,” or "levies" paid under ordinance No. 33, those generic terms are intended to include both dedications of property and payment of impact fees in lieu thereof.
. West Jordan also alleges that the action is barred by former Utah Code Ann. §§ 10-7-77 to -78. Those sections were repealed in 1978, 1978 Utah Laws ch. 27, § 12, and such claims are now covered exclusively by the Utah Governmental Immunity Act. Jenkins v. Swan, 675 P.2d 1145, 1154 (Utah 1983). For that reason, we do not consider the provisions of former sections 10-7-77 to -78 separately.
. Section 63-30-13 of the Utah Governmental Immunity Act provides that a claim against a governmental entity is barred unless notice thereof is filed within a certain period of time after the cause of action arises. Until March 30, 1978, the period provided for the filing of such a notice of claim was ninety days. Utah Code Ann. § 63-30-13-(1965). In 1978, the Utah legislature changed the length of the period to one year. 1978 Utah Laws ch. 27, § 7. Section 63-30-14 provides that within ninety days of the filing of such a notice of claim, the government shall approve or deny it and, in the absence of such action before the end of the ninety-day period, the claim shall be deemed to have been denied. After effective or actual denial of a claim, the claimant has one year to institute an action in district court against the governmental entity. Utah Code Ann. § 63-30-15(2) (1989).
. In dissent, Justice Howe argues that tolling lasted only until 1979, claiming that this court upheld the trial court’s denial of class action status, not in Call III, but in Call I. Justice Howe thereby creates an argument never raised or briefed by West Jordan; indeed, in the history of this case no one has previously suggested that this court’s decision in Call I resolved the appeal of the class issue. Justice Howe admits that Call I contains no discussion of the class issue, but he infers that because plaintiffs’ Call I briefs asked this court to review the class issue as well as the merits of the claim against West Jordan, Call /’s affirmance of the merits included a de facto affirmance of the trial court’s denial of class status. There is no basis for *762determining without benefit of briefing or argument what this court may or may not have intended to do thirteen years ago. We point out, however, that it is equally possible that this court intentionally did not address the class issue in Call I, precisely because the Call I decision denied plaintiffs' requested relief on the merits; Call I thereby rendered the class status issue moot. Only after our rehearing in Call II did we agree to remand the case for additional argument on the merits, but there is no evidence that in Call II we then reached any conclusion about the putative class.
We have no way of knowing today whether our Call I affirmance should have been treated as the final resolution of the class question. We do know that we certainly did not so treat it in Call III, when we fully addressed the class issue as though it were properly before us for the first time. Similarly, subsequent to Call I, the trial courts twice addressed plaintiffs’ class certification requests with no reference to the doctrines of res judicata, stare decisis, or law of the case. Despite Justice Howe's assertion to the contrary, these circumstances raise the possibility that after Call I the class issue was still live or that plaintiffs were raising new claims vis-a-vis class certification, thus causing tolling to occur on successive occasions. The dissent's conclusion that Call I resolved the class certification appeal sub silentio is unwarranted.
. The subdividers paid impact fees to West Jordan on the following approximate dates for the following subdivisions:
Date Subdivision Named Plaintiff
June 1975 Magic Valley #2 R & D Engineers
November 1976 Nottingham Moor Arnold Development
February 1977 McHeather American Tierra
May 1977 Cathleen American Tierra
June 1977 Jordan Grove # 5 American Tierra
September 1977 Diamondville Arnold Development
August 1978 Lessley Estates Brighton Builders
August 1978 Linsey Estates Arnold Development
August 1978 Vista Via Covecrest Properties