delivered the opinion of the Court.
This is a writ of error under § 237 of the Judicial Code to the judgment of the Supreme Court of-Illinois, affirming a decree of the Superior Court of „Cook County dismissing the bill of the Hanover Fire Insurance Company, a corporation of New York, against Patrick J. Carr, County Treasurer and ex-officio tax collector of Cook County, Illinois. The prayer was for an injunction to prevent the distraint of the property of the complainant under a warrant for the collection of $10,678.50, as taxes due under a law of Illinois, which law, the bill averred, denied to the complainant the equal protection of the laws under the Fourteenth Amendment of the Federal Constitution.
The defendant filed an answer denying the claims of the bill and, after a reply, the case was heard by the trial court, which made findings of fact in its decree based on a stipulation by the parties, and entered a decree as set forth below. '
The law in question reads as follows:
“Foreign Companies. — Tax on net receipts. Section 30. Every agent of any insurance company, incorporated by the authority of any other State or government, shall return to the proper officer of the county, town or munici *502 pality in which the agency is established; in the month of May, annually, the amount of the net receipts of such ágency.for the preceding year, which shall be entered on the tax lists of the county, town and municipality, and subject to the same rate of taxation/for .all purposes— State, county,'town and municipal — that other personal property is subject to at the place where located; said tax to be in lieu of all town and municipal licenses; ’ and all laws and parts of laws inconsistent herewith are hereby repealed: Provided, that the provisions of this section shall not be construed to prohibit cities having, an organized fire department from levying a tax, or license fee, not exceeding two per cent, in accordance with the. provisions of their respective charters, on the gross receipts of. such agency, to be applied exclusively to the support. of the fire department of such city.”. Cahill’s 111. Rev. Stat. 1925, c. 73, § 159, p. 1405.
This had been in force since 1869 and. was part of the Act of March 11, of that year, entitled “An'Act to incor-: porate and to govern fire, marine and inland navigation insurance companies doing business in the- State of Illinois.” The section Was amendéd to the above form by an Act approved May 31, 1879.
By section 22 and other sections of the original Act of 1869 (Cahill’s Ill. Rev. Stat. 1925, c. 73, § 150, p. 1402)', ' it was made.unlawful for a foreign insurance company, to transact any.-insurance business in the State unless it had. a prescribed amount of capital, appointed an attorney in the State on whom process of law eould be served, filed á properly certified copy of the charter or deed of settlement of the insurance company, showing its name and the place where located, the amount of. its capital atid a detailed statement of its assets, together with its indebtedness, the losses adjusted and unpaid/the'amount incurred and in process of adjustment, and a copy, of its last annual report. . It was required also to pleposit with the Director *503 of Trade^nd Commerce of the State, for the benefit and security of the policy holders residing in the United States, a sum of not less than $200,000 in 6 per centum stock of the United States or the State of Illinois, or approved mortgage securities, with a provision that, so long as the company should continue solvent and comply with the laws of the State, it might collect the interest on these, securities. The law provided that it should not be lawful for the'agents of the company to transact business without procuring annually from the Director of Trade and Commerce the authority stating that such company had complied with all the requisitions of the act which applied to it.; that any violation of the provisions of the act should subject the one violating it to a penalty not exceeding $500. for each violation; that such insurance companies should make annual statements of their condition and affairs to the Director of Trade and Commerce in the same manner and in the, samé form as similar insurance companies organized under the laws of the State, on or before the first day of March in each, year for the year ending On the preceding 30th of September. The Insurance . Superintendent was . given authority by the same act to investigate affairs of the foreign companies, such investigation to be at the expense of the company, and, if he found the condition of any one unsóünd, to close up the business of the company by application,tothe circuit court of the county in which. it had its principal office. By the same act, each foreign company was required to pay $3Q for filing the charter, $10 for filing the annual statement required, and $2 for each certificate of authority for agents, and certain other fees of a similar character. Paragraphs 150, 152, 156, Cahill’s Rev. Stat, 111.. 1925, c.V3..
By the Act of Juné .28,: 1919 (Cahill's 111. Rev. Stat. 1925, c. 73, § 79, p. 1390), it was provided that each nonresident corporation licensed and admitted to dp an insur *504 anee business in the State should pay an annual state tax for the privilege of so doing, equal to 2 per centum of the gross amount of premiums received during the preceding calendar year on contracts covering risks within the State after certain reductions; that the tax should be in lieu of all license fees or privilege or occupation taxes levied or assessed by any municipality in the State, and that no municipality should impose any license fee, privilege or occupation tax upon such corporation for the privilege of doing an insurance business therein, but this should not be construed to prohibit the levy and collection of any state, county or municipal taxes upon the real and personal property of such corporations, or the levying and collection of taxes authorized by § 30, above quoted.
By § 12 of the same act (Cahill’s Ill. Rev. Stat., c. 73, § 90, p. 1391), it was provided that, if any corporation should fail or neglect to make any report, or refuse to pay any tax assessment within thirty days after the same became due, the Department of Trade and Commerce should’ have power to revoke its license to transact the business of insurance in the State, or to suspend it until the reports were filed of the taxes paid.
The complainant insurance company complied with the requirements of .§ 22 and other unrepealed sections of the Act of 1869, and paid the 2 per cent, tax on its premiums received, as provided by the Act of 1919.
By the General Revenue Act of Illinois, in force since-February 25, 1898 (Cahill’s Rev. Stat. 1925, c. 120, § 329, p. 2042), personal property is to be valued at its fair cash value, which value is -to be set down in one column to be headed “ Full Value,” and one-half part thereof is to -be ascertained and set down in another column headed “Assessed Value.” The one-half value of all the property so ascertained and set down is to be the value for all purposes of. taxation. It is further stipulated in this case and found by the trial court, that for the *505 year 1923, and for many years prior thereto, there has been what is called an equalization, which systematically and intentionally reduces the amount set down in the column headed “Full Value” to not.more than 60 per cent, of the actual market value of the personal property returned, and, by further reducing this by 50 per cent, to make the assessed value in accord with the statute, the tax is collected only on 30 per cent, of the full value.
This suit presents the question of the validity of the assessment made by taxing officers under § 30 for the year 1922. The Supreme Court of Illinois, in
People
v.
Barrett,
The petitioner is an insurance corporation, organized under the laws of the State of New York. By its charter, it is authorized to do a business of .insurance against the hazard of fire, marine perils, inland navigation, tornado, theft, explosion, property damage to automobiles and
*506
other property by collision, crop insurance, and other similar lines of insurance, against specified hazards. There are in Illinois domestic insurance companies, which do business in all of such risks. In
Fidelity & Casualty Company
v.
Board of Review,
The situation, then, is that a foreign fire, marine and inland navigation insurance company, like the petitioner, must pay at a rate per centum equivalent to that imposed on personal property, a tax on the cash amount or 100 per cent, of its net receipts from all its insurance business. ■ A domestic fire, marine . and inland navigation insurance company pays no tax on its net receipts from any kind of insurance. Both pay on their personal property other than net receipts, as of a fixed date in each year, on an assessment of 30 per cent, of its full value.
The Supreme Court of Illinois for many years held the payment of a tax on the net receipts was a tax on personal property.
Walker
v.
Springfield,
The general principle upon which the Supreme Court of Illinois holds the tax complained of herein to be valid, is that the payment of it is part of the condition which the petitioner as a foreign insurance company is obliged to perform, in order to maintain and retain its right to do business in the State. It was settled in the
Bank of Augusta
v.
Earle,
In the present case, there is no such permanent investment in the State of Illinois as there was in the Greene case in Alabama, but the averments of the bill show, that the complainant has from year to year secured renewal of its license in the State of Illinois, and has through many years past built up a large good will in the State of Illinois, and has associated with it a large number of agents in the various counties of the State, whose connection with it has resulted in a large and profitable business to *509 the complainant, and that it has large numbers of records containing information respecting its policy holders, the character and nature of their policies, and other records, the value of all of which would be destroyed if it were excluded from the State by a denial of the equal protection of .the laws. In the Greene case the license was indefinite. ' In this case it must be renewed from year to year, but the principle is the same, that pending the period of business permitted by the State, the State must not enforce against its licensees unconstitutional burdens.
' It is insisted that we must accept the construction of § 30 by the state Supreme Court, and, as the tax levied is sustained by its construction and has been held by the court to be an indispensable condition upon which the petitioner may continue to do business in Illinois, this Court is bound by both those conclusions.
It is true that the interpretation put upon such a tax law of a State by its Supreme Court is binding upon this Court as to its meaning; but it is not true that this Court, in accepting the meaning thus given, may not exercise its independent judgment in determining whether, with the meaning given, its effect would not involve a violation of the Federal Constitution. As said by this Court in
St. Louis Southwestern Railway
v.
Arkansas,
“ Upon the- mere question of construction we are of course concluded by the decision of the state court of last resort. But when.the question is whether a tax imposed by a State deprives a party of rights secured by the Federal Constitution, the decision is not dependent upon the form in which the taxing scheme is cast, nor upon the characterization of that scheme as adopted by the state court. We must regard the substance, rather than the *510 form, and the controlling test is to be found in the operation and effect of the law as applied and enforced by the State.”'
This view has been upheld in many cases.
Western Union Telegraph Company
v.
Kansas,
' “ The Supreme Court justified the imposition as an occupation tax — that is, as we understand it, a tax upon the occupation of the defendant. But this Court although bound by the construction that the Supreme Court may put upon the statute is not bound by the characterization of it so far as that characterization may bear upon the question of its constitutional effect.”
In subjecting a law of the State which imposes a charge upon foreign corporations to the test whether such a charge violates the equal protection clause of the Fourteenth Amendment, a line has to- be drawn between the burden imposed by the State for the license or privilege to do business in the State, and the tax burden which, having secured the right to do business, the foreign corporation must share with all .the corporations aWl other taxpayers of the State. With respect to the admission fee', so to speak,, which the foreign corporation must pay, to become a .quasi citizen of the State and entitled to *511 equal privileges with citizens of the State, the measure of the burden is in the discretion of the State, and any inequality as between the foreign corporation and the domestic corporation in that regard does not come within the inhibition of the Fourteenth Amendment; but, after its admission, the foreign corporation stands equal, and is to be classified with domestic corporations of the same kind.
In this class of cases, therefore, the question of the ap plication of the equal protection clause turns on the stage at which the foreign corporation is put on a level with domestic corporations, in engaging in business within the State. To leave the determination of such a question finally to a state court would be to deprive this Court of its independent judgment in determining whether a federal constitutional limitation has been infringed. 'While we may not question the meaning of the tax law, as interpreted by the state court, in the manner and effect in which it is to be enforced, we must re-examine the question passed upon by the state court, as to whether the law complained of is a part of the condition upon which admission to do business of the State is permitted and is merely a regulating license by the State to protect the State and its citizens in dealing with such corporation, or whether it is a tax law for the purpose of securing contributions to the revenue of the State as they are made by other taxpayers of the State. Our power and duty in this regard must follow from our decisions, and while the exact question has not heretofore been considered, there can be no doubt that our conclusion finds its complete support in the analogies of other cases in which we have had to determine what our duty is in dealing with the alleged invalidity of state legislation.
Bailey
v.
Alabama,
It is plain that compliance with § 30 is not a condition precedent to permission to do business in Illinois. The state Supreme Court concedes this, but its reasoning that payment of the tax under the section is a condition to its doing business in Illinois, which may vary, at the will of the State without regard'to taxes on similar domestic corporations, is shown by the following passages:
“ The fact that a tax is a privilege tax does not necessarily require that it be paid as a condition precedent to entering the State. Such a condition, being precedent, could of course be met but once. However, the greatest financial benefit to such a company flows from the continuation of the privilege to do business. Compensation for that privilege should be based on the benefits actually derived from the business done under such privilege, and such compensation must necessarily be assessed in some manner after the business is done and the benefits thereof received. Section 30 provides the method by which the' amount of this compensation shall be determined and assessed.” "(p- 373.)
“ Section 22 of the act relating to fire, marine and inland navigation insurance, aside from specifying certain requirements' imposed upon foreign insurance companies seeking to do business in this state and specifying what shall be necessary to secure the right of entry, further provides: * Nor shall it be lawful for any agent or agents to act for any company or companies referred to in this' section, directly or indirectly, in taking risks or transact *513 ing the business of fire and inland navigation insurance in this state without procuring annually from the Insurance Superintendent a certificate of authority stating that, such company has complied with all the requisitions of this act which apply to such companies and the name of the attorney appointed to act for the company.’ The provision of section 30 requiring the return of net receipts of this tax, are a part of the ‘ requisitions of this act.’ It is evident, therefore, from the language in section 22 quoted, that before the appellant may continue in business in this state, its agent shall procure annually from the Insurance Superintendent of the State or his successor in law, a certificate showing that it has complied with the requirements of section 30 with reference to this tax. Such certificate can not be lawfully issued without such" showing. This act provides no other means of collecting such tax and no reference is made for its collection.” (p. 374.)
The Court then refers to another Act which imposes a penalty for violation of § 30 by placing risks or policies of indemnity upon property in any other manner than through regularly authorized^ agents, and justifying a revocation of the license fot, , period of not less than ninety days, and that it sha'l not be reissued until it appears that there is complete compliance with the laws ■ “ the State governing such companies, and until it has been shown that all taxes and penalties and expenses due thereunder have been paid.
“It seems clear, therefore,” says the Court (p. 375), “ that this tax is levied as compensation for the privilege of continuing their business in the State.-
“While the Act of 1919 . . . imposes an annual state tax equal to two per cent, on the gross amount of the premiums received by any foreign insurance company during the preceding year, . . . that fact does not show that the tax imposed on the business of fire insurance by section 30 is not likewise a tax for the privilege of doing *514 business. The Act of 1919 requires that the tax there levied be paid to the State. Section 30 requires' that the tax be apportioned among the State and the different municipalities of the situs of the.agency. A valid reason ,is seen for this distribution of the tax. The foreign fire insurance company takes its net proceeds largely from the vicinity of its agencies and it is but just that it return to the municipality in which its agency is located something in lieu of the taxes that would otherwise be realized from such net receipts as are taken away.”
The view of the Court seems to be that the constitutional necessity for equal application of the laws of the State to foreign and domestic corporations properly engaged in business, is avoided if only the State provides that failure to comply with, the laws during the period, or at the end of the period, for which the license runs, justifies a revocation of the license pending the period, or a refusal to grant a new license for the following year. We do not think the State may thus relieve itself from granting the equal protection of its laws to a foreign company which has met the conditions precedent to its becoming a
quasi
domestic citizen. Of course, at the end of the year for which the license has been granted, the State may in its discretion impose, as conditions precedent for a renewed license, past compliance with its valid laws; but that does not enable the State to make past compliance with § 30 a condition precedent tó a renewal of the license, if, as we find, that section violates the Fourteenth Amendment; for, as already said, while a State may forbid a foreign corporation to do business within its jurisdiction, or to continue it, it may not' do so by imposing on a corporation a sacrifice of its constitutional rights. We have said in
Cheney Bros. Co.
v.
Massachusetts,
We thus reach the question whether a tax imposed upon foreign fire, marine and inland navigation insurance companies on the net receipts of all their business, whether fire, marine, inland navigation or other risks, is a denial of the equal protection of the laws, when domestic insurance companies pay no taxes on such net receipts. Under the previous decisions of the Supreme Court of. Illinois, when the net receipts were treated as personal property and the assessment thereon as a personal property tax subjected to the same reductions for equalization and debasement, it might well have been said that there was no substantial inequality as between domestic corporations and foreign corporations, in that the net receipts were personal property acquired during the year and removed by foreign companies out of the State, and could be required justly to yield a tax fairly equivalent to that which the domestic companies would have to pay on all their personal property, including their net receipts or what they were invested in. It was this view, doubtless, which led to the acquiescence by the state authorities and the foreign insurance companies in such a construction of § 30, and in the practice under it. But an occupation tax imposed upon 100 per cent, of the net receipts of foreign insurance companies admitted to do business in Illinois, is a heavy discrimination in favor of domestic insurance companies of the same class' and in the same business, which pay only a tax on the assessment of personal property at a valuation reduced to one-half of 60 per cent, of the full value of that property. It is a denial of the equal protection of the laws.
Sunday Lake Iron Co.
v.
Wakefield,
One argument urged against our conclusion is that the relation of a foreign insurance company to the State which permits it to do business within its limits, is contractual, and that, by coming into the State and engaging in business on the conditions imposed, it waives all constitutional restrictions, and can not object to a condition or law regulating its obligations, even though, as a statute operating
in invitum,
it may be in conflict with constitutional limitations. This argument can not prevail in view of the decisions of this Court in well considered cases.
Insurance Co.
v.
Morse,
The judgment of the Supreme Court of Illinois must be reversed and the case remanded for further proceedings not inconsistent with this opinion.
Reversed.
