26 CFR § 301.6316-3
Allocation of tax attributable to foreign currency
June 25, 2020
CFR

(a) Adjusted gross income ratio. The portion of the tax which is attributable to amounts received in nonconvertible foreign currency shall, for purposes of applying §301.6316-1 to the currency of each foreign country, be the amount by which:

(1) The amount which bears the same ratio to the entire tax for the taxable year as (i) the taxpayer's adjusted gross income received in that currency bears to (ii) the adjusted gross income determined under section 62 by taking into account the entire gross income and all deductions allowable under that section without distinction as to amounts received in foreign currency, exceeds

(2) The total of the allowable credits against tax, and payments on account of tax, which are properly allocable to the amount of that currency included in gross income.

(b) Example.

(1) For the calendar year 1955 Mr. Jones and his wife filed a joint return on which the adjusted gross income is as follows, after amounts received in foreign currency had been properly translated into United States dollars for tax computation purposes:

Open Table
Fulbright grant received by Mr. Jones in nonconvertible foreign currency $8,000
Dividends received by Mr. Jones entitled to dividends-received credit 500
Compensation for personal services of Mrs. Jones 3,000
Net profit from business carried on by Mrs. Jones 2,500
   Total adjusted gross income 14,000

(2) The following amounts are allowable as properly deductible from adjusted gross income, no determination being made as to whether or not any part of them is properly allocable to the Fulbright grant:

Open Table
Deduction for personal exemptions $3,000
Charitable contributions 500
Interest expense 400
Taxes 300
   Total allowable deductions 4,200

(3) For the taxable year the following amounts are allowable as credits against the tax, or as payments on account of the tax:

Open Table
Foreign tax credit for foreign taxes paid on Fulbright grant $300.00
Dividends-received credit 20.00
Credit for income tax withheld upon compensation of Mrs. Jones 304.80
Payments of estimated tax (see §301.6316-6(b)(2) for determination of amounts):
U.S. dollars $426.32
Foreign currency 893.88 1,320.20
   Total allowable credits and payments 1,945.00

(4) The portion of the tax which is attributable to amounts received in nonconvertible foreign currency is $33.49, determined as follows:

Open Table
Adjusted gross income $14,000.00
Less: Allowable deductions 4,200.00
Taxable income 9,800.00
Tax computed under section 2 2,148.00
Ratio of adjusted gross income received in nonconvertible foreign currency to entire adjusted gross income ($8,000 ÷ $14,000) (percent) 57.14
Portion of tax attributable to nonconvertible foreign currency ($2,148 × 57.14 percent) $1,227.37
Less:
Credit for foreign taxes paid on Fulbright grant $300.00
Payment in foreign currency of estimated tax 893.88 1,193.88
Portion of tax attributable to amounts received in nonconvertible foreign currency 83.49

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