Mr. Justice Blackmun
delivered the opinion of the Court.
This case presents the issue whether an employer, who in 1963 reimbursed lunch expenses of employees who were on company travel but not away overnight, must withhold federal income tax on those reimbursements. Stated another way, the issue is whether the lunch reimbursements qualify as [22]*22“wages” under § 3401 (a) of the Internal Revenue Code of 1954, 26 U. S. C. § 3401 (a).
I
The facts are not in any real dispute. Petitioner Central Illinois Public Service Company (Company) is a regulated public utility engaged, in downstate Illinois, in the generation, transmission, distribution, and'sale of electric energy, and in the distribution and sale of natural gas. Its principal office is in Springfield. It serves a geographic area of some size. In order adequately to serve the area, the Company, in accord with long-established policy, reimburses its employees for reasonable, legitimate expenses of transportation, meals, and lodging they incur in travel on the Company’s business. Some of these trips are overnight; on others, the employees return before the end of the business day.
In 1963, the tax year in issue, the Company had approximately 1,900 employees. It reimbursed its union employees and the operating employees of its western division (its only nonunionized division) for noon lunches consumed, while on authorized travel, in an amount not to exceed $1.40 per lunch.1 The amount was specified in the Company’s collective-bargaining agreement with the union. Other salaried employees were reimbursed for actual reasonable luncheon expenses up to a specified maximum amount.2
An employee on an authorized trip prepared his expense account on a company form. This was turned in to his supervisor for approval. The $1.40 rate sometimes was in excess of the actual lunch cost, but at other times it was insufficient to [23]*23cover that cost. An employee who took lunch from home with him on a company trip was entitled to reimbursement. If, because of the locality of his work assignment on a particular day, the employee went home for lunch, he was not entitled to reimbursement. Many employees were engaged in open-air labor. Even in 1963 the $1.40 rate was “modest.” 3
The employee on travel status rendered no service to the Company during his lunch. He was off duty and on his own time. He was subject to call, however, as were all employees at any time as emergencies required. The lunch payment was unrelated to the employee’s specific job title, the nature of his work, or his rate of pay. “[T]his lunch payment arrangement was beneficial and convenient for the company and served its business interest. It saved the company employee time otherwise spent in travelling back and forth as well as the usual travel expenses.” 4
During 1963 the Company paid its employees a total of $139,936.12 in reimbursement for noon lunches consumed while away from normal duty stations on nonovernight trips. It did not withhold federal income tax for its employees with respect to the components of this sum. The Company in 1963, however, did withhold and pay federal income withholding taxes totaling $1,966,489.87 with respect to other employee payments.
Upon audit in 1971, the Internal Revenue Service took the position that the lunch reimbursements in 1963 qualified as wages subject to withholding. A deficiency of $25,188.50 in withholding taxes was assessed. The Company promptly paid this deficiency together with $11,427.22 interest thereon, a total of $36,615.72. It then immediately filed its claim for [24]*24refund of the total amount so paid and, with no action forthcoming on the claim for six months, see 26 U. S. C. § 6532 (a) (1), instituted this suit in the United States District Court for the Southern District of Illinois to recover the amount so paid.
The District Court ruled in the Company’s favor, holding that the reimbursements in question were not wages subject to withholding.. 405 F. Supp. 748 (1975). The United States Court of Appeals for the Seventh Circuit reversed. 540 F. 2d 300 (1976). Because that decision appeared to be in conflict with the views and decision of the Fourth Circuit in Royster Co. v. United States, 479 F. 2d 387 (1973), we granted certiorari. 431 U. S. 903 (1977).
II
In Commissioner v. Kowalski, 434 U. S. 77 (1977), decided earlier this Term, the Court held that New Jersey’s cash reimbursements to its highway patrol officers for meals consumed while on patrol duty constituted income to the officers, within the broad definition of gross income under § 61 (a) of the 1954 Code, 26 U. S. C. § 61 (a), and, further, that those cash payments were not excludable under § 119 of the Code, 26 U. S. C. § 119, relating to meals or lodging furnished for the convenience of the employer.
Kowalski, however, concerned the federal income tax and the issue of what was income. Its pertinency for the present withholding tax litigation is necessarily confined to the income tax aspects of the lunch reimbursements to the Company’s employees.
The income tax issue is not before us in this case. We are confronted here, instead, with the question whether the lunch reimbursements, even though now they may be held to constitute taxable income to the employees who are reimbursed, are or are not “wages” subject to withholding, within the meaning and requirements of §§ 3401-3403 of the Code, 26 U. S. C. §§3401-3403 (1970 ed. and Supp. V). These withholding [25]*25statutes are in Subtitle C of the Code. The income tax provisions constitute Subtitle A.
The income tax is imposed on taxable income. 26 IT. S. C. § 1. Generally, this is gross income minus allowable deductions. 26 IT. S. C. § 63 (a). Section 61 (a) defines as gross income “all income from whatever source derived” including, under § 61 (a) (1), “[c]ompensation for services.” The withholding tax, in some contrast, is confined to wages, § 3402 (a), and § 3401 (a) defines as “wages,” “all remuneration (other than fees paid to a public official) for services performed by an employee for his employer, including the cash value of all remuneration paid in any medium other than cash.” The two concepts — income and wages — obviously are not necessarily the same. Wages usually are income,5 but many items qualify as income and yet clearly are not wages. Interest, rent, and dividends are ready examples. And the very definition of “wages” in § 3401 (a) itself goes on specifically to exclude certain types of remuneration for an employee’s services to his employer (e. g., combat pay, agricultural labor, certain domestic service).
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Mr. Justice Blackmun
delivered the opinion of the Court.
This case presents the issue whether an employer, who in 1963 reimbursed lunch expenses of employees who were on company travel but not away overnight, must withhold federal income tax on those reimbursements. Stated another way, the issue is whether the lunch reimbursements qualify as [22]*22“wages” under § 3401 (a) of the Internal Revenue Code of 1954, 26 U. S. C. § 3401 (a).
I
The facts are not in any real dispute. Petitioner Central Illinois Public Service Company (Company) is a regulated public utility engaged, in downstate Illinois, in the generation, transmission, distribution, and'sale of electric energy, and in the distribution and sale of natural gas. Its principal office is in Springfield. It serves a geographic area of some size. In order adequately to serve the area, the Company, in accord with long-established policy, reimburses its employees for reasonable, legitimate expenses of transportation, meals, and lodging they incur in travel on the Company’s business. Some of these trips are overnight; on others, the employees return before the end of the business day.
In 1963, the tax year in issue, the Company had approximately 1,900 employees. It reimbursed its union employees and the operating employees of its western division (its only nonunionized division) for noon lunches consumed, while on authorized travel, in an amount not to exceed $1.40 per lunch.1 The amount was specified in the Company’s collective-bargaining agreement with the union. Other salaried employees were reimbursed for actual reasonable luncheon expenses up to a specified maximum amount.2
An employee on an authorized trip prepared his expense account on a company form. This was turned in to his supervisor for approval. The $1.40 rate sometimes was in excess of the actual lunch cost, but at other times it was insufficient to [23]*23cover that cost. An employee who took lunch from home with him on a company trip was entitled to reimbursement. If, because of the locality of his work assignment on a particular day, the employee went home for lunch, he was not entitled to reimbursement. Many employees were engaged in open-air labor. Even in 1963 the $1.40 rate was “modest.” 3
The employee on travel status rendered no service to the Company during his lunch. He was off duty and on his own time. He was subject to call, however, as were all employees at any time as emergencies required. The lunch payment was unrelated to the employee’s specific job title, the nature of his work, or his rate of pay. “[T]his lunch payment arrangement was beneficial and convenient for the company and served its business interest. It saved the company employee time otherwise spent in travelling back and forth as well as the usual travel expenses.” 4
During 1963 the Company paid its employees a total of $139,936.12 in reimbursement for noon lunches consumed while away from normal duty stations on nonovernight trips. It did not withhold federal income tax for its employees with respect to the components of this sum. The Company in 1963, however, did withhold and pay federal income withholding taxes totaling $1,966,489.87 with respect to other employee payments.
Upon audit in 1971, the Internal Revenue Service took the position that the lunch reimbursements in 1963 qualified as wages subject to withholding. A deficiency of $25,188.50 in withholding taxes was assessed. The Company promptly paid this deficiency together with $11,427.22 interest thereon, a total of $36,615.72. It then immediately filed its claim for [24]*24refund of the total amount so paid and, with no action forthcoming on the claim for six months, see 26 U. S. C. § 6532 (a) (1), instituted this suit in the United States District Court for the Southern District of Illinois to recover the amount so paid.
The District Court ruled in the Company’s favor, holding that the reimbursements in question were not wages subject to withholding.. 405 F. Supp. 748 (1975). The United States Court of Appeals for the Seventh Circuit reversed. 540 F. 2d 300 (1976). Because that decision appeared to be in conflict with the views and decision of the Fourth Circuit in Royster Co. v. United States, 479 F. 2d 387 (1973), we granted certiorari. 431 U. S. 903 (1977).
II
In Commissioner v. Kowalski, 434 U. S. 77 (1977), decided earlier this Term, the Court held that New Jersey’s cash reimbursements to its highway patrol officers for meals consumed while on patrol duty constituted income to the officers, within the broad definition of gross income under § 61 (a) of the 1954 Code, 26 U. S. C. § 61 (a), and, further, that those cash payments were not excludable under § 119 of the Code, 26 U. S. C. § 119, relating to meals or lodging furnished for the convenience of the employer.
Kowalski, however, concerned the federal income tax and the issue of what was income. Its pertinency for the present withholding tax litigation is necessarily confined to the income tax aspects of the lunch reimbursements to the Company’s employees.
The income tax issue is not before us in this case. We are confronted here, instead, with the question whether the lunch reimbursements, even though now they may be held to constitute taxable income to the employees who are reimbursed, are or are not “wages” subject to withholding, within the meaning and requirements of §§ 3401-3403 of the Code, 26 U. S. C. §§3401-3403 (1970 ed. and Supp. V). These withholding [25]*25statutes are in Subtitle C of the Code. The income tax provisions constitute Subtitle A.
The income tax is imposed on taxable income. 26 IT. S. C. § 1. Generally, this is gross income minus allowable deductions. 26 IT. S. C. § 63 (a). Section 61 (a) defines as gross income “all income from whatever source derived” including, under § 61 (a) (1), “[c]ompensation for services.” The withholding tax, in some contrast, is confined to wages, § 3402 (a), and § 3401 (a) defines as “wages,” “all remuneration (other than fees paid to a public official) for services performed by an employee for his employer, including the cash value of all remuneration paid in any medium other than cash.” The two concepts — income and wages — obviously are not necessarily the same. Wages usually are income,5 but many items qualify as income and yet clearly are not wages. Interest, rent, and dividends are ready examples. And the very definition of “wages” in § 3401 (a) itself goes on specifically to exclude certain types of remuneration for an employee’s services to his employer (e. g., combat pay, agricultural labor, certain domestic service). Our task, therefore, is to determine the character of the lunch reimbursements in the light of the definition of “wages” in § 3401 (a), and the Company’s consequent obligation to withhold under § 3402 (a).
Before we proceed to the resolution of that issue, however, one further observation about the income tax aspect of lunch reimbursements is in order. Although United States v. Correll, 389 U. S. 299 (1967), restricting to overnight trips the travel expense deduction for meal costs under § 162 (a)(2), dispelled some of the confusion, it is fair to say that until this Court’s very recent decision in Kowalski, the Courts of Appeals have been in disarray on the issue whether, under §§ 61 and 119 of the 1954 Code or under the respective predecessor sections of the 1939 Code, such reimbursements were income [26]*26at all to the recipients.6 Thus, even the income tax character of lunch reimbursements was not yet partially clarified before the end of 1967, four full years after the tax year for which withholding taxes on lunch reimbursements are now being claimed from the Company in the present case, and were not entirely clarified until the Kowalski decision a few weeks ago.
Ill
The Sixteenth, or income tax, Amendment to the Constitution of the United States became effective in February 1913. The ensuing Tariff Act of October 3, 1913, § IIE, 38 Stat. 170, contained, perhaps somewhat surprisingly, a fairly expansive withholding provision.7 This, however, was repealed8 and in due course came to be replaced with the predecessor of the current “information at the source” provisions constituting § 6041 et seq. of the 1954 Code, 26 U. S. C. § 6041 et seq.
The present withholding system has a later origin in the Victory Tax imposed by the Revenue Act of 1942, § 172, 56 Stat. 884. This, with its then new § 465 (b) of the 1939 Code, embraced the basic definition of “wages” now contained in [27]*27§ 3401 (a) of the 1954 Code. The Victory Tax was replaced by the Current Tax Payment Act of 1943, 57 Stat. 126, and was repealed by the Individual Income Tax Act of 1944, § 6 (a), 58 Stat. 234. The structure of the 1943 Act survives to the present day.
Li this legislation of 35 years ago Congress chose not to return to the inclusive language of the Tariff Act of 1913, but, specifically, “in the interest of simplicity and ease of administration,” confined the obligation to withhold to “salaries, wages, and other forms of compensation for personal services.” S. Rep. No. 1631, 77th Cong., 2d Sess., 165 (1942)9 The committee reports of the time stated consistently that “wages” meant remuneration “if paid for services performed by an employee for his employer” (emphasis supplied). H. R. Rep. No. 2333, 77th Cong., 2d Sess., 126 (1942); S. Rep. No. 1631, 77th Cong., 2d Sess., 166 (1942); H. R. Rep. No. 401, 78th Cong., 1st Sess., 22 (1943); S. Rep. No. 221, 78th Cong., 1st Sess., 17 (1943); H. R. Rep. No. 510, 78th Cong., 1st Sess., 29 (1943).
The current regulations also contain the “if” clause, Treas. Reg. on Employment Taxes, §31.3401 (a)-1(a)(2), 26 CFR § 31.3401 (a)-1(a) (2) (1977), and then, in § 31.3401 (a)-1 (b)(2) recite: “Amounts paid specifically — either as advances or reimbursements — for traveling or other bona fide ordinary and necessary expenses incurred or reasonably expected to be incurred in the business of the employer are not wages and are not subject to withholding.” But § 31.3401 (a)-1(b) (9) provides: “The value of any meals or lodging furnished to' an employee by his employer is not subject to withholding if the value of the meals or lodging is excludable from the gross income of the employee. See § 1.119-1 of this chapter (Income Tax Regulations).”
[28]*28The Internal Revenue Service by its Regulations thus now would tie the withholding obligation of the employer to the income tax result for the employee.
IV
The Government, straightforwardly and simplistically, argues that the definition of “wages” in § 3401 (a) corresponds to the first category of gross income set forth in § 61 (a)(1), and that the two statutes “although not entirely congruent [in their] relationship,” Brief for United States 11, have “equivalent scope,” id., at 15. It is claimed that the meal allowance was compensatory, for it was paid for the performance of assigned service at the place the employer determined. Thus, it is said, there was a direct causal connection between the receipt of the allowance and the performance of services. The allowance, then, was part of a total package of remuneration designed to attract and hold the employee to the Company. The Government further argues that this is in accord with the Court’s pronouncements as to what is compensation for purposes of the tax statutes. It states that § 3401 (a) broadly defines “wages,” and it cites Old Colony Trust Co. v. Commissioner, 279 U. S. 716 (1929), where the Court held employees taxable for the amount of their income taxes paid by their employers; Commissioner v. LoBue, 351 U. S. 243 (1956), where the transfer of assets to an employee at less than fair market value in order to secure better service was held to result in taxable income to the employee; Social Security Board v. Nierotko, 327 U. S. 358 (1946), where the definition of wages under the Social Security Act was at issue; and Otte v. United States, 419 U. S. 43, 49-50 (1974), which concerned the payment of wage claims by a trustee in bankruptcy. For purposes of the tax law, the Government argues, there is no difference between benefits of this kind and traditional wage or salary payments. Both are “[Compensation for services” under §61 (a)(1) and “remuneration ... for [29]*29services” under § 3401 (a). It would explain away the seemingly pertinent Treas. Reg. § 31.3401 (a)-l(b) (2) on the ground that it relates only to business expenses that are deductible under § 162 (a) of the Code, and that Correll excluded from the benefit of § 162 (a) the cost of meals consumed during nonovernight travel. And it urges that what is important is that the payments at issue were a result of the employment relationship and were a part of the total of the personal benefits that arose out of that relationship.
y
We do not agree with this rather facile conclusion advanced by the Government. The case, of course, would flow in the Government’s favor if the mere fact that the reimbursements were made in the context of the employer-employee relationship were to govern the withholding tax result. That they were so paid is obvious. But it is one thing to say that the reimbursements constitute income to the employees for income tax purposes, and it is quite another thing to say that it follows therefrom that the reimbursements in 1963 were subject to withholding. There is a gap between the premise and the conclusion and it is a wide one. Considerations that support subjectability to the income tax are not necessarily the same as the considerations that support withholding. To require the employee to carry the risk of his own tax liability is not the same as to require the employer to carry the risk of the tax liability of its employee. Required withholding, therefore, is rightly much narrower than subjectability to income taxation.
As we have noted above, withholding, under § 3402, is required only upon wages, and § 3401 (a) defines wages as “all remuneration ... for services performed by an employee for his employer.” When the withholding system was effectuated in 1942, the obligation was confined to wages, and the like, “in the interest of simplicity and ease of administration.” [30]*30S. Rep. No. 1631, 77th Cong., 2d Sess., 165 (1942). And what is now Treas. Reg. § 31.3401 (a)-l(b)(2), applicable to employers and excluding from the concepts of wages and of withholding amounts “paid specifically ... for traveling or other bona fide ordinary and necessary expenses incurred . . . in the business of the employer,” was issued originally — long prior to the Correll decision in 1967 — as § 404.14 of T. D. 5277, 1943 Cum. Bull. 927, 941.10 There is nothing in Correll that relates to the withholding provisions, and there is nothing in Treas. Reg. § 31.3401 (a)-1(b) (2) that incorporates any overnight concept. This is so despite the Government’s assertion that “consistently” since 1940, that is, since I. T. 3395, 1940-2 Cum. Bull. 64 (relating to railroad employees and their deducting the cost of room rentals and meals for necessary rest while away from home), it has adhered, to the overnight rule in determining income tax liability. Brief for United States 32. Such consistent adherence to the overnight rule in determining income tax liability — together with the consistent absence of any reference to the overnight rule in the withholding regulations — strongly indicates that it was intended that the overnight rule not apply in determining withholding tax obligations.
[31]*31Decided, cases have made the distinction, between wages and income and have refused to equate the two in withholding or similar controversies. Peoples Life Ins. Co. v. United States, 179 Ct. Cl. 318, 332, 373 F. 2d 924, 932 (1967); Humble Pipe Line Co. v. United States, 194 Ct. Cl. 944, 950, 442 F. 2d 1353, 1356 (1971); Humble Oil & Refining Co. v. United States, 194 Ct. Cl. 920, 442 F. 2d 1362 (1971); Stubbs, Overbeck Associates v. United States, 445 F. 2d 1142 (CA5 1971); Royster Co. v. United States, 479 F. 2d, at 390;11 Acacia Mutual Life Ins. Co. v. United States, 272 F. Supp. 188 (Md. 1967). The Government would distinguish these cases on the ground that some of them involved overnight travel, the expenses of which would be deductible, and that others were concerned with particularized allowances. We perceive the distinctions but are not persuaded that they blunt the basic difference between the wage and the income concepts the respective courts have emphasized.
An expansive and sweeping definition of wages, such as was indulged in by the Court of Appeals, 540 F. 2d, at 302, and is urged by the Government here, is not consistent with the existing withholding system. As noted above, Congress chose simplicity, ease of administration, and confinement to wages as the standard in 1942. This was a standard that was intentionally narrow and precise. It has not been changed by Congress since 1942, although, of course, as is often the case, administrative and other pressures seek to soften and stretch the definition. Because the employer is in a secondary position as to liability for any tax of the employee, it is a matter of obvious concern that, absent further specific congressional action, the employer’s obligation to withhold be precise and not speculative. See Humble Oil & Refining Co. v. United [32]*32States, 194 Ct. Cl., at 933, 442 F. 2d, at 1369-1370. See also H. R. Rep. No. 94-1515, p. 489 (1976).12
In 1963 not one regulation or ruling required withholding on any travel expense reimbursement. The intimation was quite the other way. See Treas. Reg. § 31-3401 (a)-1(b) (2). No employer, in viewing the regulations in 1963, could reasonably suspect that a withholding obligation existed. The 1940 ruling upon which the Government would erect its case, I. T. 3395, 1940-2 Cum. Bull. 64, predated the withholding regulations of 1943. Apart from the fact that this was a deduction ruling, it is also significant that the Government did not reflect it in its withholding regulations adopted shortly thereafter. With this omission on the part of the Government, it is hardly reasonable to require an employer to fill the gap on its own account. Further, in 1963 and for some time thereafter all judicial decisions were the other way, even on the deductibility issue. Only with Correll, decided by this Court in 1967, was there a ruling of nondeductibility. And until the Court of Appeals’ decision in the present case, no court had ever held lunch reimbursements to be wages for withholding purposes. The first published pronouncement by the Internal Revenue Service with respect to withholding came only in 1969 with Rev. Rul. 69-592, 1969-2 Cum. Bull. 193, shortly after Correll came down. That Ruling’s suggestion that withholding was a possible requirement (when reimbursed travel expenses exceeded travel deductions) contained no reference whatsoever to wages, and thus avoided any mention of the statutory requirement that the payment must be a wage to be subject to withholding.
[33]*33This is not to say, of course, that the Congress may not subject lunch reimbursements to withholding if in its wisdom it chooses to do so by expanding the definition of wages for withholding. It has not done so as yet. And we cannot justify the Government's attempt to do so by judicial determination.
The judgment of the Court of Appeals is reversed.
It is so ordered.