delivered the opinion of the. Court.
This is an appeal from the decree1 of a specially constituted District Court2 perpetually enjoining the appellants from enforcing against the appellee the provisions of Act No. 207 of 1929 of the General Assembly of the State of Indiana. The appellee, by bill filed on behalf of himself and all others similarly situated, charged that the *531statute violates the Fourteenth Amendment of the Federal Constitution and two sections of the constitution of Indiana. It averred, and the answer admitted, that, unless enjoined, appellants would institute prosecutions against appellee under certain sections of the act. After hearing, the District Court entered a perpetual injunction, holding the law offensive to the federal and to the state constitution.
The statute provides that it shall be unlawful for any person, firm, association or corporation, foreign or domestic, to establish or operate any store3 within the State without first obtaining from the appellants a license, which must be renewed annually. It makes the operation of a store without a license a misdemeanor punishable by a fine of not less than twenty-five dollars nor more than one hundred dollars for each day it is so operated.
Section 5 of the act provides:
“ Every person, firm, corporation, association or co-partnership opening, establishing, operating or maintaining one or more stores or mercantile establishments, within this state, under the same general management, supervision or ownership, shall pay the license fees hereinafter prescribed for the privilege of opening, establishing, operating or maintaining such stores or mercantile establishments. The license fee herein prescribed shall be paid annually, and shall be in addition to the filing fee prescribed in sections 2 and 4 of this act.
, “ The license fees herein prescribed shall be as follows:
“(1) Upon one store, the annual license fee shall be three dollars for each such store;
*532“(2) Upon two stores or more, but not to exceed five stores, the annual license fee shall be ten dollars for each such additional store;
“(3) Upon each store in excess of five, but not to exceed ten, the annual license fee shall be fifteen dollars for each such additional store;
“(4) Upon each store in excess of ten, but not to exceed twenty, the annual license fee shall be twenty dollars for each such additional store;-
"(5) Upon each store in excess of twenty, the annual license fee shall be twenty-five dollars for each such addi-^ tional store.”
It is this section which appellee asserts renders the act unconstitutional as applied to him.
The bill of complaint alleges, and it is admitted, that the appellee is engaged in the business of selling groceries, fresh vegetables and meats at wholesale and retail in Indianapolis, and has been so engaged for more than ten years, has capital invested in his- business, in excess of $200,000, and annual sales of over $1,000,000. He operates two hundred and twenty-five stores in the said city, and more than five hundred persons, firms, associations and corporations, foreign and domestic, are engaged in the operation of two or more, stores in the State.
The bill charges that the graduation of the tax per store according to the number of stores under a single ownership and management is based on no real difference between a store part of such a group and one individually and separately owned and operated, or between the businesses transacted in them; that the number of stores conducted by one owner bears no relation to the public health, welfare, or safety, none to the size of the enterprise as a whole, to its capital, its earnings or its value; that the classification made by the statute is without basis in fact, is unreasonable and arbitrary, and results *533in depriving him of his property without due process, and denying him the equal protection of the laws.
In the court below appellants defended on the grounds that the statute was an exercise of the police power and was also a revenue measure which levied an ordinary occupation tax. They offered no evidence to sustain the first ground mentioned, and do not press it here. They now stand only upon the power of the legislature, in prescribing an occupation tax, to classify businesses, so long as its action is not unreasonable and arbitrary. They say that the act fulfills the constitutional requirement that, in so classifying, the law-making body shall apply the same means and methods to all persons of the same class, so that the law will operate equally and uniformly, and all similarly circumstanced will be treated alike. The District Court held that the statute failed to conform to this standard.
The act adopts a different measure of taxation for stores known as chain stores, from that applied to those owned and operated as individual units. Evidence was offered by the appellee intended to demonstrate that there are no substantial or significant differences between the business and operation of the two kinds of stores, such as would justify the classification, and by the appellants to prove the existence of such differences.
The District Court failed to make findings of fact and law as now required by Equity Rule 70%, but contented itself with a partial summary of the facts and certain general conclusions of law. Had the rule been in force at the time of the trial, we should feel constrained to remand the case with directions to make such findings. We shall, in the circumstances, summarize the proofs.
In addition to the facts averred in the bill, above set forth, the appellee offered uncontradicted evidence on the following points. Of the retail stores of the country ap*534proximately sixty-three per cent, are independent or community stores, sixteen per cent, are department stores, twelve per cent, are chain stores, and four per cent, are mail-order houses. Several department stores in Indianapolis, doing a much larger business than the appellee, pay a tax of only $3 as contrasted with his tax of $5443, although their business is highly competitive with that of chain stores. Persons owning a greater number of stores, and with 'more money invested, in a business similar to that of appellee, but having only one store in Indiana, pay $3 because they have but one store in the State. Large numbers of stores independently owned and controlled are members of associations or “voluntary chains ” under which cooperative buying is conducted for the group, but each of them is required to pay a license fee of only $3. The mere addition of a new unit or store to an existing chain of stores does not increase the sales more than arithmetically. The additional unit has its own expenses, and the volume of sales of the former stores in the chain, to which it constitutes an addition, is not increased by adding it.
The appellants produced evidence to prove that there are many points of difference between chain stores and independently owned units. These consist in quantity buying, which involves the application of the mass process to distribution, comparable to the mass method used in production; buying for cash and obtaining the advantage of a cash discount; skill in buying, so as not to overbuy, and at the same time keep the stores stocked with products suitable in size, style and quality for the neighborhood customers who patronize them; warehousing of goods and distributing from a single warehouse to numerous stores; abundant supply of capital, whereby advantage may be taken of opportunities for establishment of new units; a pricing and sales policy different from that of the indi*535vidual store, involving slightly lower prices; a greater turn-over, and constant analysis of the turn-over to ascertain relative profits on varying items; unified, and therefore cheaper and better advertising for the entire drain in a given locality; standard forms of display for the promotion of sales; superior management and method; concentration of management in the special lines of goods handled by the chain; special accounting methods; standardization of store management, sales policies and goods sold.
The appellants’ evidence indicated that all of these advantages are interrelated and interdependent in the chain store business. The witnesses conceded that some of them may be found in large independent grocery or drug stores or the like, but they did not, as appellee claims, state that all of them combined, exist therein, as in chain stores.
The record shows that the chain store has many features and advantages which definitely distinguish it from the individual store dealing in the same commodities. With respect to associations of individual stores for purposes of cooperative buying, exchange of ideas as to advertising, sales methods, etc., it need only be remarked that these are voluntary groups, and that series of independent units cannot, in the nature of things, be as efficiently and successfully integrated as a chain under a single ownership and management.
But the appellee in proof and argument drew a comparison' between the chain store and the department store which he insists exhibits the classification of the statute as illusory and arbitrary. He proved that there are two department stores in Indianapolis, each doing a business in excess of $8,000,000 a year, one having 124 and the other 86 separate departments, and that under the law each pays a tax of only $3. He uses these facts to give point to *536his assertion that a store is not a unit of value. This argument ignores the fact that in determining how it shall classify occupations for taxation, the legislature is not confined merely to the value of the business taxed, but may have regard to other elements.
While it is true that large department stores reap many of the advantages and employ many of the methods of a chain store group, such as large capital, buying in quantity, 'and the ability to command the highest type 'of management, it is, nevertheless, evident that, whereas a department store spreads its efforts over a number of different sorts of shops under one roof, the chain store owner concentrates its energy upon the conduct of but one kind of stores located in many neighborhoods. Obviously, greater specialization in management and methods is possible in the latter type of enterprise than in the former, whose management, however capable, must after all consist of many separate types each devoted to a single store similar to an independent retail store. The mass buying done by a chain store owner for a number of units selling the same goods, is not comparable to the individuated purchasing of a department store for its grocery, its shoe, its drug, and each of its other departments. It is not to be expected that the management problems of stores, essentially separate and differing entirely in the character of their business, under the aegis of a single department store, will be the same as those involved in the intensive selling of a chain store owner operating an equal number of units all devoted to a single line of business.
Notwithstanding the differences disclosed between chain and other stores, the court below found that “ all persons engaged in the operation of one or more stores . . . belong to the same class, for occupational tax purposes, as plaintiff, and should pay the same license fee, regardless of the number of stores owned and operated by them,” and that any other classification is arbitrary *537and unconstitutional. It is this holding which the appellants challenge.
The principles which govern the decision of this cause are well settled. The power of taxation is fundamental to the very'existence of the government of the States. The restriction that it shall not be so exercised as to deny to any the equal protection of the laws does not compel the adoption of an iron rule of equal taxation, nor prevent variety or differences in taxation, or discretion in the selection of subjects, or the classification for taxation of properties, businesses, trades, callings, or occupations. Bell’s Gap R. Co. v. Pennsylvania, 134 U. S. 232; Southwestern Oil Co. v. Texas, 217 U. S. 114; Brown-Forman Co. v. Kentucky, 217 U. S. 563. The fact that a statute discriminates in favor of a certain class does not make it arbitrary, if the discrimination is founded upon a reasonable distinction, American Sugar Rfg. Co. v. Louisiana, 179 U. S. 89, or if any state of facts reasonably can be conceived to sustain it. Rast v. Van Deman & Lewis Co., 240 U. S. 342; Quong Wing v. Kirkendall, 223 U. S. 59. As was said in Brown-Forman Co. v. Kentucky, supra, at p. 573;
“A very wide discretion must be conceded to the legislative power of the State in the classification of trades, callings, businesses or occupations which may be subjected to special forms of regulation or taxation through an excise or license tax. If the selection or classification is neither capricious nor arbitrary, and rests upon some reasonable consideration of difference or policy, there is no denial of the equal protection of the law.”
It is not the function of this Court in cases like the present to consider the propriety or justness of the tax, to seek for the motives or to criticize the public policy which prompted the adoption of the legislation. Our duty is to sustain the classification adopted by the legislature if there are substantial differences between the occupations *538separately classified. Such differences need not be great. The past decisions of the Court make this abundantly clear.
In American Sugar Rfg. Co. v. Louisiana, supra, a license tax imposed upon persons and corporations carrying on the business of refining sugar and molasses, which excepted planters and farmers grinding and refining their own sugar and molasses, was held not to work an unconstitutional discriminatioti. . * -
In Cargill v. Minnesota, 180 U. S. 452, a state statute requiring the proprietors of warehouses situated on the right of way of a railroad to secure a license from a state commission, and containing no such requirement with respect to warehouses not so situated but doing exactly the same business, was held valid.
In Armour Packing Co. v. Lacy, 200 U. S. 226, a North Carolina statute imposed an occupation tax upon every meat packing house doing business in that State. The Armour Company, which was taxed under this statute, had its packing house at Kansas City and shipped its packed products to various depots in the State, where they were sold and delivered in competition with wholesalers and commission merchants who were not required to pay the tax. The statute was sustained.
In Quong Wing v. Kirkendall, supra, a statute in Montana imposing a license fee on hand laundries was held not to constitute a denial of the equal protection of the laws because it did not apply to steam laundries, and because it exempted from its operation laundries not employing more than two women.
In Bradley v. Richmond, 227 U. S. 477, an ordinance imposed a tax on the conduct of various businesses and gave a power of classification to a committee of the council. That committee classified private bankers, placing a tax of'one amount on certain of them and of a different amount on others. It appeared that the busi*539ness of those in the one class was that of lending money at high rates upon salaries and household furniture, while that done by the other class was that of lending money upon commercial securities. The classification was held not to offend the constitutional' provision for equal protection of the laws.
In Metropolis Theatre Co. v. Chicago, 228 U. S. 61, an ordinance classified theatres for license fees based on and graded according to the admission charged. It was. shown that some of the theatres charging a higher admission had less revenue than those charging a smaller price, and therefore paying lower license fees. This Court held the classification valid.
In Singer Sewing Machine Co. v. Brickell, 233 U. S. 304, there was drawn in question a statute of Alabama which provided that every person, firm or corporation selling or delivering sewing machines in person or through agents should pay a tax of $50 annually for each county in which they might sell or deliver said articles; and for each wagon and team used in delivering or displaying the same an additional sum in each county of $25 annually. It exempted merchants selling sewing machines at their regularly established places of business. The Singer Company, a foreign corporation, was engaged in many counties in the State in selling and renting sewing machines, in part from regularly established places of business and in part by means of wagons going from place to place in counties where its stores were located. It attacked the statute on the ground that it involved an arbitrary discrimination between merchants selling at their stores and merchants selling by means of wagons. It was shown that the merchants who sold at their stores usually delivered the articles sold by wagon. This Court sustained the tax, saying with respect to the two kinds of business [p. 315]:
*540“ But there is an evident difference, in the mode of doing business, between the local tradesman and the itinerant dealer, and we are unable to say that the distinction made between them for purposes of taxation is arbitrarily made. In such matters the States necessarily enjoy a wide range of discretion, and it would require a clear case to justify the courts in striking down a law that is uniformly applicable to all persons pursuing a given occupation, on the ground that persons engaged in other occupations more or less like it ought to be similarly taxed.”
In Rast v. Van Deman & Lewis Co., supra, a statute placing taxes additional to the usual occupations taxes on persons who offered, with merchandise bargained or sold in the course of trade, coupons, profit-sharing certificates, or the like, was attacked as being arbitrary and unreasonable, in that the only difference between the other merchants and those who used trading stamps was a difference in the method of advertising. This Court said, however [p. 357]:
“ The difference between a business where coupons are used, even regarding their use as a means of advertising, and a business where they are not used, is pronounced. Complainants are at pains to display it. The legislation which regards the difference is not arbitrary within the rulings of the cases. It is established that a distinction in legislation is not arbitrary, if any state of facts reasonably can be conceived that would sustain it, ...”
In Armour & Co. v. Virginia, 246 U. S. 1, the statute under attack laid a tax on merchants doing business in the State based on the amount of their purchases during the license period, including as purchases all goods and merchandise manufactured by the licensee and sold or offered for sale in the State. It excluded from its operation domestic manufacturers, taxed on capital, who offered for sale at the place of manufacture goods and merchan*541dise manufactured by them. It applied alike to citizens and residents of Virginia and noncitizens and nonresidents who manufactured in Virginia. The state supreme court held that it applied to Armour & Co., who manufactured part of their products without the State and sold them within it. This Court said [p. 6]:
“ In the first place, we are of opinion that the distinction upon which the classification in the statute rests between a manufacturer selling goods by him made at their place of manufacture and one engaged as a merchant in whole or in part in selling goods of his manufacture at a place of business other than where they were made is so obvious as to require nothing but a mere statement of the two classes. All question concerning the equal protection clause of the Fourteenth Amendment may therefore be put out of view.”
In view of the numerous distinctions above pointed out between the business of a chain store and other types of store, we cannot pronounce the classification made by the statute to be arbitrary and unreasonable. That there are differences and advantages in favor of the chain store is shown by the number of such chains established and by their astonishing growth. More and more persons, like the appellee, have found advantages in this method of merchandising and have therefore adopted it. What was said in Metropolis Theatre Co. v. Chicago, supra, [p. 69] is quite applicable here:
. . The distinction obtains in every large city of the country. The reason for it must therefore be substantial, and if it be so universal in the practice of the business it would seem not unreasonable if it be adopted as the basis of governmental action.”
The court below fell into the error of assuming that the distinction between the appellee’s business and that of the other sorts of stores mentioned was solely one of own*542ership. It disregarded the differences shown by the record. They consist not merely in ownership, but in organization, management, and type of business transacted. The statute treats upon a similar basis all owners of chain stores similarly situated. In the light of what we have said this is all that the Constitution requires. Clark v. Titusville, 184 U. S. 329; Magoun v. Illinois Tr. & Savings Bank, 170 U. S. 283.
Article 1, § 23 of the constitution of Indiana4 which the court below held the statute violates, seems to us not to set any different standard than does the Fourteenth Amendment. No decision of the Indiana courts is cited in support of the court’s conclusion, and those referred to by appellants demonstrate that the section permits classification for purposes of taxation and that the same principles are applicable as under the Fourteenth Amendment. Kersey v. Terre Haute, 161 Ind. 471; 68 N. E. 1027; Gafill v. Bracken, 195 Ind. 551; 145 N. E. 312; 146 N. E. 109. Article 10, § 1,5 is declared by the Supreme Court of the State to be applicable only to the assessment made under a general levy, and not to occupation or license taxes. Thomasson v. State, 15 Ind. 449; Bright v. McCullough, 27 Ind. 223; Gafill v. Bracken, supra. We cannot, therefore, hold the statute repugnant to the clauses of the state constitution on which the appellee relies.
*543The judgment of the District Court must be reversed and the cause remanded with instructions to dismiss the bill.
Reversed.
38 F. (2d) 652.
Pursuant to XJ. S. C., Tit. 28, § 380.
Section 8 defines a store as follows:
“ The term ‘ store ’ as used in this act shall be construed to mean and include any store or stores or any mercantile establishment or establishments which are owned, operated, maintained or controlled by the same person, firm, corporation, copartnership or association, either domestic or foreign, in which goods, wares, or merchandise of any kind, are sold, either at retail or wholesale.”
“The General Assembly shall not grant to any citizen or class of citizens privileges and immunities which upon the same terms shall not equally belong to all citizens.”
“ The General Assembly shall provide by law for a uniform and equal rate of assessment and taxation; and shall prescribe such regulations as shall secure a just valuation for taxation of all property, both real and personal, excepting such only, for municipal, educational, literary, scientific, religious or charitable purposes as may be especially exempted by law.”