IRC §911: calculating the exclusion

Here we determine your housing cost exclusion or deduction amount, the calculation of the exclusion limits, the critical stacking rule which often catches taxpayers by surprise, the interaction with Foreign Tax Credits, and the impact on self-employment tax.

The foreign housing cost amount (IRC §911(c)(3); Reg. §1.911-4)

The "housing cost amount" is the foundation for the housing exclusion or deduction. It consists of reasonable expenses paid or incurred during the taxable year for housing in a foreign country for the individual and their spouse and dependents who reside with them.

Expenses included

• Rent
• The fair rental value of housing provided in kind by the employer
• Utilities (electricity, gas, water), excluding telephone charges
• Real and personal property insurance
• Non-deductible occupancy taxes
• Non-refundable fees paid for securing a leasehold
• Rental of furniture and accessories
• Household repairs
• Residential parking

Expenses excluded

• The cost of purchasing a house, improvements, or other capital expenditures
• Mortgage principal payments
• Purchased furniture or accessories
• Domestic labour (maids, gardeners, and similar)
• Depreciation of housing owned by the taxpayer
• Deductible interest and taxes, which remain deductible on Schedule A
• Expenses for more than one foreign household — except that if the spouse and dependents do not reside in the taxpayer's tax home because living conditions there are dangerous, unhealthful, or otherwise adverse, the expenses of a second household may also be claimed
• Meals or lodging already excluded under IRC §119 (convenience of the employer)
• Pay television subscriptions

Expenses that are "lavish or extravagant under the circumstances" are not treated as reasonable and are excluded. Note also that the deduction for moving expenses, temporarily suspended by the TCJA for tax years 2018 through 2025, has been permanently disallowed except for members of the armed forces and the intelligence community.

Exclusion vs deduction

Once you have totalled your qualified expenses, the tax treatment depends on the source of the income used to pay them.

Housing exclusion (employer-provided amounts). This applies to amounts paid by an employer, including salary, housing reimbursements, educational reimbursements, and the fair market value of compensation provided in kind. The exclusion reduces gross income, and the amount cannot exceed the total foreign earned income amount.

Housing deduction (self-employed amounts). This applies to amounts paid from self-employment earnings. It is an above-the-line deduction used to calculate Adjusted Gross Income. The deduction is limited to your foreign earned income minus the amounts already excluded under the FEIE and the housing exclusion.

Claiming both. If you have both wages and self-employment income, you must apportion the housing cost amount. The portion attributable to employer-provided amounts is excluded first; the remainder is treated as a deduction.

Co-ordination with the foreign earned income exclusion

The foreign housing cost exclusion election is made and revoked in the same manner as the FEIE election. However, it is a separate election. A taxpayer may elect one exclusion and not the other; to elect both, each must be separately elected. As with the FEIE, once the election is revoked the taxpayer may not claim the exclusion for five tax years following revocation without the IRS's consent.

No election is necessary to take the excess housing cost deduction. The taxpayer must provide enough information with their return to determine the correct amount of tax — their own identifying information and that of their employer, the country in which their tax home is established, their qualifying period, the status under which qualification is claimed, their foreign earned income, and their housing expenses. The housing cost deduction is reported on Schedule 1 of Form 1040 or Form 1040-SR.

Calculating the limitations (IRC §911(b)(2); IRC §911(c))

Qualifying for the exclusion does not mean all income is tax-free. The exclusion is limited to the lesser of the individual's foreign earned income or the statutory dollar limit for the taxable year.

The housing cost limitations

The housing cost amount is calculated by first limiting your qualified expenses to the statutory ceiling and then subtracting the base amount (the floor).

• The floor (base): you must pay the first portion of housing costs yourself. This floor is 16% of the FEIE limit for the year, computed daily. Any cost paid up to this floor is not considered for the housing cost exclusion or deduction.
• The ceiling: qualified housing expenses are generally capped at 30% of the FEIE limit. The IRS recognises that housing in cities such as London, Tokyo, or Hong Kong exceeds the standard ceiling, and publishes annual notices increasing the 30% limit for specific high-cost locations.

The dollar limitations

The maximum exclusion and deduction amounts are adjusted annually for inflation:

The stacking rule (IRC §911(f))

Many taxpayers mistakenly believe that excluding foreign earned income means their remaining income is taxed at the lowest brackets, starting at 10% or 12%. This is incorrect, because of the special stacking rule.

Income excluded under IRC §911 is included for purposes of determining the tax rate applicable to the non-excluded income. Effectively, your non-excluded income is "stacked" on top of the excluded income and taxed at the higher marginal rates that would apply if the exclusion were not taken.

The tax liability is calculated as follows:

1. Calculate tax on (excluded income + other taxable income).
2. Calculate tax on the excluded income alone.
3. Subtract step 2 from step 1. The result is your final tax liability.

Denial of double benefits (IRC §911(d)(6); Reg. §1.911-6)

You cannot exclude income and also use the expenses related to that income to lower your tax on other income. A taxpayer may not deduct unreimbursed employee business expenses that are allocable to the excluded foreign earned income.

The Foreign Tax Credit "scale back"

No credit is allowed for foreign taxes paid on amounts excluded from gross income. This disallowed credit is determined by formula: the foreign taxes imposed on foreign earned income are deemed to accrue, on a pro-rata basis, to income as the income is received or accrued, and the taxes so accrued are apportioned to the taxable year during which the income is received or accrued. This rule applies to all individuals regardless of their method of accounting.

Impact on self-employment tax (IRC §1402(a)(11))

A common pitfall for self-employed expats is assuming the FEIE eliminates self-employment tax. It does not.

All earned income must be taken into account in computing self-employment tax, even if the income is exempt from income tax because of the FEIE. The only way to avoid US SE tax is if the US has a Totalization Agreement with the foreign country and the taxpayer is subject to that country's social security system. Critically, you must obtain a Certificate of Coverage from the host country to prove this exemption to the IRS.

Choosing the best alternative: exclusion vs tax credits

Because claiming the FEIE disallows a portion of the Foreign Tax Credit, a strategic choice must be made.

• Low-tax countries: if the foreign tax rate is lower than the US rate, claiming the FEIE is usually advantageous.
• High-tax countries: if the foreign tax rate is higher than the US rate, it is often better to forgo the FEIE and claim the Foreign Tax Credit. The FTC will likely reduce the US tax to zero, and excess credits can be carried back one year or forward ten years.

Revocation caution: if you previously elected the FEIE and now want to switch to the FTC, claiming the FTC is considered a revocation of the election. Once revoked, you cannot re-elect the FEIE for five years without IRS consent.

Conclusion

The §911 exclusion requires precise calculation. The definition of housing costs is strict, the stacking rule ensures progressive tax rates apply to your remaining income, and the disallowance rules prevent double dipping. Proper planning involves running the numbers — comparing the FEIE result against a pure Foreign Tax Credit approach to determine which yields the lower total global tax liability.