delivered the opinion of the Court.
These cases are here on certiorari to the Supreme Court of Iowa. They were argued together and involve, in the main, the same questions. The petitioner in No. 15 is the Iowa-Des Moines National Bank. The petitioner in No. lb is the Central State Bank, an Iowa corporation. In each case, it is charged that, for the years 1919, 1920, 1921 and 1922, the taxing officers of .Polk County exacted from petitioner taxes on shares of its stock at rates higher than were exacted of competing moneyed capital; and that in 1923 petitioner paid the taxes with interest and penalties under protest, after threat of seizure of its property. In each case it is alleged that this unequal taxation contravened both- the state law and the equal protection clause of the Fourteenth Amendment. In No. 15, it is also charged that § 5219 of the Revised Statutes of the United -States was violated. In each case the petitioner seeks by an action of mandamus to compel the appropriate county officers to refund the- part of the taxes alleged to have been illegally exacted, and the interest and penalties. The county officers denied the discrimination charged and also set up many special defenses.
The trial court, after hearings which occupied more than sixteen weeks, denied relief in each case without making findings of fact or rendering an opinion. Its judgments were affirmed in-the highest court of the . State by a divided bench.
■ The taxes exacted from the petitioners were laid under Iowa Code, § 1322-la,. Supplement 1913. That section imposes upon “state, savings and national bank stock and loan and trust company stock and moneyed capital,” an
ad valorem
tax based upon twenty per cent, of the actual value thereof, computed at the same rate at which tangible property is taxed under the consolidated levy for local, county and state purposes. Compare
First National Bank
v.
Anderson,
The wrongful discrimination so effected was not attributable to any act of the assessing body. 2 The shares in such competing domestic corporations had, in each year, been properly classified by the assessor in compliance with § 1322-la; but the county auditor, in making up the tax list subsequently, changed these assessments and wrongfully extended them upon the books as “ moneys and credits ” subject to the 5 mill levy. In this form the tax was certified by the auditor to the county treasurer for. collection; and the treasurer exacted taxes in accordance with the auditor’s certification.
The Supreme Court of Iowa, having found or assumed that there was systematic discrimination, as charged, in favor of shares in the competing domestic corporations, denied relief because it held that the auditor’s acts in disregarding assessments properly made were a usurpa *243 tion of power and a'nullity; that the county treasurer was not bound to accept the auditor’s unauthorized certification; and that his exaction of the taxes in accordanee therewith was, therefore, also unauthorized. 3 The Court declared that, since the wrongful exaction was made without authority from the State, it did not constitute discrimination by the State; declared that, since neither the auditor nor the treasurer had power to discharge a legally assessed tax, the competing domestic corporations remain, so far as appears, liable for the balance of the assessments; and held that the petitioners had no other remedy than to await action by the taxing authori *244 ties to collect the taxes remaining due from their competitors or to initiate proceedings themselves to compel such collection. In other words, it held that no right of petitioners under the state law was violated, because they were not overassessed; that no right under the federal law was violated, because the lower -taxation of their competitors due to usurpation by officials was not an act.of the State; and that the discrimination thus effected was remediable only by correcting the wrong under the state law in favor of the competitors and not “by extending . . . the benefits as of a similar wrong ” to the petitioners. The decision rests upon a misconception of the scope and effect of the federal rights involved.
First.
The Iowa-Des Moines National Bank is an instrumentality of the United States, and but-for § 5219 the State would be without power to tax its shares.
First National Bank
v.
Anderson,
Second.
Both petitioners claim that they have been subjected to intentional, systematic discrimination in violation of the equal protection clause of the Fourteenth Amendment. The federal right of the Central State Bank rests wholly upon that clause. It is assumed that there was such inequality of treatment as the Constitution prohibits.
Raymond
v.
Chicago Union Traction Co.,
Respondents rely upon
Barney v. City of New York,
Third.
The fact that the-State may still have power to equalize the treatment of the petitioners and the competing domestic corporations by compelling the latter to pay hereafter the unpaid balance of the amounts assessed against them in 1919, 1920, 1921 and 1922 is not material. The petitioners’. rights were violated, and the causes of action arose, when taxes at the lower rate were collected from their competitors. It may be assumed that all ground for a claim for refund would have fallen if the State, promptly upon discovery of the discrimination, had removed it by collecting the additional taxes from the favored competitors. By such collection the petitioners’ grievances would have been redressed; for these are not primarily overassessment. The right invoked is that to equal treatment; and such treatment will be attained if either their competitors’ taxes are increased or their own reduced. But it is well settled that a taxpayer who has been subjected to discriminatory taxation through the favoring of others in violation of federal law, cannot be required himself to assume the burden of seeking an increase of the taxes which the others should have paid.
Cumberland Coal Co.
v.
Board of Revision, supra; Greene
v.
Louisville & Interurban R. Co.,
The petitioners are entitled to obtain in these súits refund of the excess of taxes exacted from them.
Reversed.
Notes
Section 1310 expressly excepts from its operation “ all moneyed capital within the meaning of section fifty-two hundred nineteen of the Revised Statutes of the United States,” and provides that such capital “ shall be listed' and assessed ... at the same rate as state, savings, national bank and loan and trust company stock is taxed . . ., and at the actual value of the moneyed capital so invested.”
Other competing moneyed capital in the form of investments held by individuals and by a few foreign corporations was wrongfully classified by- the assessor as “ moneys and credits,” and so returned upon the assessment rolls to the county auditor, who extended the assessments upon the tax books accordingly, and applied to them the 5 mill levy. The Supreme Court of Iowa held that the right to complain of this discrimination had been lost by failure to avail of the method of review prescribed by the State. . We have no occasion to consider this matter, as we hold that the more favorable taxation of the competing domestic corporations entitles the petitioners to the relief sought.
The Iowa court describes (
Rippey
v.
Texas,
Neal
v.
Delaware,
See Samuel Shepp IsseKs, “Jurisdiction of the Lower Federal Courts to Enjoin Unauthorized Action of State Officials,” .40 Harv. L. Rev. 969,
