AMT and foreign tax credit: what US expats must know in 2026
The foreign tax credit can offset AMT liability, but a separate AMT-specific FTC calculation applies under IRC Section 59, limiting the credit based on your alternative minimum taxable income rather than your regular taxable income.
The AMT and foreign tax credit interact through a parallel calculation system.
If you owe AMT, the IRS requires a second Form 1116 – labeled for AMT – that recomputes your foreign tax credit using AMTI-based foreign source income. This recalculation often produces a smaller allowable credit than the regular-tax FTC.
Expats who claim the foreign earned income exclusion on Form 2555 aren't automatically shielded from AMT, but the mechanism isn't an AMTI add-back; the FEIE doesn't appear anywhere on Form 6251 Part I.
What it does trigger is the stacking rule under IRC §911(f): the Foreign Earned Income Tax Worksheet in the Form 6251 instructions requires any taxable excess to be taxed at the rate that would apply if the excluded income sat on top of it.
What is the alternative minimum tax (AMT) for US expats?
The AMT is a parallel tax system that adds back certain deductions and exclusions to compute alternative minimum taxable income, then applies its own rates and exemption to determine whether you owe additional tax beyond your regular liability.
AMT exists to prevent high-income taxpayers from using deductions, exclusions, and credits to reduce their regular tax to zero or near-zero. For tax year 2025, the two AMT rates are 26% on the first $239,100 of taxable excess and 28% on amounts above that threshold ($119,550 for married filing separately).
The AMT exemption for tax year 2025 shields a portion of AMTI from the AMT rates. These exemption amounts are adjusted annually for inflation:
- Single / Head of Household: $88,100
- Married filing jointly / Qualifying surviving spouse: $137,000
- Married filing separately: $68,500
The exemption phases out at 25 cents per dollar of AMTI above $626,350 for single filers and $1,252,700 for joint filers.
Tax year 2026 note
The One Big Beautiful Bill Act makes the higher exemption amounts above permanent, but the phase-out thresholds drop sharply for tax year 2026 – to $500,000 for single, head of household, and married filing separately, and $1,000,000 for married filing jointly – and the phase-out rate doubles from 25% to 50%. More expats with capital gains, ISOs, or large SALT add-backs are likely to owe AMT on their 2026 return.
Expats living abroad do not receive a special AMT exemption – the same thresholds apply regardless of where you live. Paying AMT as an expat catches many filers off guard, particularly those who rely on the FEIE to eliminate their regular tax liability.
See our TFX guide to IRS inflation adjustments for 2025 for the full list of updated thresholds.
How the foreign tax credit works under regular tax vs. AMT
Under AMT, the foreign tax credit is recalculated using your AMTI-based foreign source income rather than your regular taxable income, which often produces a smaller allowable credit.
The AMT foreign tax credit operates through a separate §904 limitation computed on AMTI. The following table compares the two calculations:
Regular tax vs. AMT foreign tax credit comparison:
| Feature | Regular tax FTC – Form 1116 | AMT FTC – Form 6251 / Form 1116 AMT |
|---|---|---|
| Tax base | Regular taxable income | Alternative minimum taxable income |
| Limitation calculation | §904 applied to regular taxable income and foreign source income | §904 applied to AMTI and AMTI-based foreign source income |
| Carryover rules | 1 year back, 10 years forward, by income category | Same – 1 year back, 10 years forward, tracked separately |
| Applicable IRC section | §901, §904, §27 | IRC Section 59, §904 applied on AMTI basis |
The AMT adjustment for the foreign tax credit is the recalculation itself – using AMTI instead of taxable income changes both the numerator and denominator of the §904 fraction, typically producing a smaller credit.
See our TFX guide to Form 1116 for the regular-tax FTC mechanics.
AMTI calculation: What gets added back for expats
Expats who claim the foreign earned income exclusion aren't automatically shielded from AMT, even though the excluded amount isn't added back into AMTI.
Instead, IRC §911(f) requires the AMT tax on any taxable excess to be figured as if the excluded income sat on top of it, which can trigger AMT even when regular tax liability is zero.
The following adjustments are most relevant to US expats. Each references the corresponding area of Form 6251:
- FEIE and housing exclusion stacking rule, not an add-back – neither the FEIE nor the foreign housing exclusion claimed on Form 2555 adds anything to AMTI. Instead, they change the rate applied to any AMTI you do have: the Foreign Earned Income Tax Worksheet in the Form 6251 instructions requires the tax on your taxable excess to be figured as if the excluded income sat on top of it.
- Standard deduction disallowance – the standard deduction is not allowed for AMT purposes. For tax year 2025, this adds back $15,750 for single filers or $31,500 for joint filers.
- Certain itemized deduction adjustments – state and local tax deductions, miscellaneous deductions, and certain other itemized amounts are added back or limited for AMT.
- Depreciation adjustments – different depreciation methods and recovery periods apply under AMT, which can affect expats with foreign rental property or business assets.
An expat who excludes the full $130,000 FEIE and has little other AMT preference income will typically have an AMTI far below the exemption amount – AMT exposure in that situation usually comes from other preference items, not from the exclusion itself.
The AMT foreign tax credit limitation explained
The individual AMT FTC is limited by the §904 limitation recomputed on your AMTI – not by a flat percentage cap. This recalculation typically produces a smaller allowable credit than the regular-tax FTC because AMTI-based foreign source income is computed differently.
Under IRC Section 59, the AMT FTC equals what the regular FTC would be if the pre-credit tentative minimum tax were the tax base and the §904 limitation used AMTI instead of regular taxable income. The FTC cannot exceed the tentative minimum tax.
For individual taxpayers, there is no explicit 90% cap on the AMT FTC under current law. The limitation is structural – the §904 fraction computed on AMTI usually produces a smaller credit than the regular-tax calculation.
The old 90%-of-tentative-minimum-tax limitation was repealed for tax years beginning after 2004. Under the current CAMT (IRC §59(l)), the foreign tax credit has a direct component with no percentage cap, plus an indirect, CFC-sourced component limited to 15% of the AFSI attributable to that CFC's income.
Any AMT FTC that exceeds the limitation is not lost – it becomes a carryforward under the same 1-year-back, 10-year-forward rules as the regular FTC.
See our TFX guide to FTC carryovers for the tracking mechanics.
Form 6251 and the foreign tax credit: Line-by-line walkthrough
Form 6251 is the IRS worksheet where your AMT liability is calculated – and where the foreign tax credit gets a second, separate limitation that often surprises expats.
The key sections relevant to the Form 6251 foreign tax credit interaction:
- Part I – computing AMTI. Start with regular taxable income and add back AMT adjustments: standard deduction, state/local tax deduction, depreciation differences, and other preference items. The FEIE and housing exclusion are not part of this add-back list – they're handled separately through the §911(f) stacking rule when the tax is figured in Part II. The result is your AMTI.
- Part II – computing tentative minimum tax. Subtract the AMT exemption from AMTI to get the taxable excess. Apply the 26%/28% rates. Then reduce by the AMT FTC – the credit computed on a separate Form 1116 labeled for AMT purposes – to arrive at tentative minimum tax after the credit.
- Part III – determining whether AMT is owed. Compare tentative minimum tax to your regular tax. If tentative minimum tax exceeds regular tax, the difference is your AMT, reported on Schedule 2 of Form 1040.
See our TFX guide to reporting foreign income on Form 1040 for how these forms connect to your return.
Simplified foreign tax credit election for AMT: What it is and who should use it
The simplified AMT FTC election can save hours of calculation time, but making it irrevocably when it does not benefit you can cost more in tax than it saves in preparation fees.
Under IRC Section 59, the simplified foreign tax credit AMT election allows eligible taxpayers to use their regular-tax FTC limitation – computed on Form 1116 – as a proxy for the AMT FTC limitation. This avoids preparing a separate AMT-specific Form 1116.
The election works by substituting your regular-tax foreign source income ratio for the AMTI-based ratio in the §904 limitation.
The election is irrevocable once made. It applies to the first qualifying year and all subsequent years unless the IRS consents to revocation.
If the regular-tax limitation is higher than the AMT limitation, the election benefits you. If it is lower, you lose credit that a full AMT Form 1116 calculation would have allowed.
AMT foreign tax credit calculation: A step-by-step example
In a typical TFX client scenario, an expat earning significant foreign wages who claims the FEIE can still owe AMT, not because the exclusion is added back into AMTI, but because the §911(f) stacking rule raises the effective rate applied to any taxable excess.
A US citizen working in Germany, filing single, earning $180,000 in foreign wages for tax year 2025:
- Compute regular tax. The expat claims the $130,000 FEIE and the $15,750 standard deduction, leaving $34,250 of taxable income. Because of the FEIE stacking rule under IRC §911(f), the tax on that $34,250 is figured as if it sat on top of the excluded $130,000 – about $8,220, not the amount a flat bracket calculation on $34,250 alone would suggest.
- Compute AMTI. Start with taxable income of $34,250 and add back the disallowed standard deduction of $15,750. AMTI = $50,000. The FEIE itself is not added back.
- Apply the exemption. The single-filer exemption for tax year 2025 is $88,100. Since AMTI ($50,000) is below the exemption, taxable excess is $0.
- Result. Tentative minimum tax is $0, so no AMT foreign tax credit is needed, and no AMT is owed – not because the German tax offsets it, but because AMTI never exceeds the exemption in a scenario like this. AMT becomes a real risk for FEIE claimants mainly when they also have large AMT preference items (ISOs, high SALT add-back, private-activity-bond interest) or high non-excluded income that pushes AMTI itself above the exemption.
Foreign tax credit disallowed by AMT: Why it happens and what to do
A disallowed AMT foreign tax credit does not disappear – it converts into a minimum tax credit carryforward that can reduce your regular tax in future years.
The three main reasons the foreign tax credit is disallowed by AMT:
- Smaller AMTI-based foreign source income. The §904 limitation uses AMTI instead of regular taxable income. Because the FEIE runs through the §911(f) stacking rule rather than an AMTI add-back, the ratio of foreign source income to total AMTI can shift, reducing the allowable credit.
- Income category mismatches. The basket allocation under AMT may differ from the regular-tax allocation if AMTI adjustments shift income between passive and general categories. Credits trapped in one basket cannot offset AMT in another.
- Low foreign tax rates. When the foreign country's tax rate is lower than the effective AMT rate on the same income, the FTC cannot fully offset the tentative minimum tax regardless of the limitation.
AMT credit carryforward for expats: Recovering taxes paid in prior years
Expats who paid AMT in prior years should always check whether they have an unused minimum tax credit carryforward on Form 8801 before assuming they owe the full regular tax shown on their return.
When you pay AMT in one year, you may generate a minimum tax credit under IRC §53 that can be carried forward indefinitely to offset regular tax in future years. The MTC applies when your regular tax exceeds your tentative minimum tax – the opposite of the year AMT was triggered.
How the MTC differs from the FTC carryover
The MTC is tracked on Form 8801 and offsets regular tax only – not AMT. AMT credit carryforward for expats is particularly valuable because expat income and foreign tax payments fluctuate year to year, creating years when the MTC becomes usable.
The AMT foreign tax credit carryover – unused AMT FTC that exceeded the §904 limitation – follows the standard 1-year-back, 10-year-forward rules but must be tracked separately from the regular FTC carryover. Mixing the two is a common error.
AMT exemption for US expats: Filing status and income thresholds
The AMT exemption is the amount subtracted from AMTI before applying AMT rates – and for married expats filing jointly, this exemption is significantly higher than for single filers.
Tax year 2025 AMT exemption and phase-out:
| Filing status | AMT exemption | Phase-out begins | Exemption fully phased out |
|---|---|---|---|
| Single / Head of Household | $88,100 | $626,350 | $978,750 |
| Married filing jointly / Qualifying surviving spouse | $137,000 | $1,252,700 | $1,800,700 |
| Married filing separately | $68,500 | $626,350 | $900,350 |
The phase-out rate is 25 cents per dollar of AMTI above the threshold. Once AMTI reaches the fully-phased-out level, the entire exemption is eliminated.
AMT exemption for US expats follows the same rules as for domestic filers. Living abroad does not provide an additional exemption or a higher threshold. The exemption amounts adjust annually for inflation under IRS Revenue Procedures.
See our TFX guide to minimum income filing thresholds for how AMT interacts with regular filing requirements.
How the foreign earned income exclusion interacts with AMT
Claiming the FEIE can reduce your regular tax to zero, but it doesn't shield you from AMT the way it shields you from regular tax – the exclusion itself isn't what creates AMT exposure.
For tax year 2025, the FEIE excludes up to $130,000 of foreign earned income from regular taxable income.
That $130,000 isn't added back on Form 6251 Part I – the FEIE isn't an AMTI adjustment item. What it does is trigger the stacking rule: any AMTI you do have is taxed at the rate that would apply if the excluded income sat on top of it.
An expat who owes zero regular tax will usually also have AMTI far below the exemption unless separate preference items (ISOs, SALT add-back, private-activity-bond interest) are pushing AMTI up on their own.
This is why the FEIE is not always the best choice from an overall tax perspective. In high-tax countries where foreign taxes exceed the US rate, switching to the FTC can eliminate both regular tax and AMT – because the FTC offsets tax directly, without triggering the §911(f) stacking rule that applies when the FEIE is claimed.
See our TFX case study where the FEIE was denied for an example of how residency tests affect the exclusion.
Foreign housing exclusion and AMT: An often-overlooked add-back
The foreign housing exclusion, like the FEIE, is not an AMTI add-back – it's covered by the same §911(f) stacking-rule worksheet. Expats in high-cost cities like London or Zurich are more likely to face AMT because of other preference items, such as the SALT add-back or ISOs, than because of the housing exclusion itself.
See our TFX guide to the foreign housing exclusion for the 2025 caps and qualifying expense rules.
Corporate AMT and the foreign tax credit: Form 1118 considerations
US corporations with significant foreign operations face a dual FTC limitation challenge: one under the regular corporate tax and a separate, often more restrictive limitation under the corporate AMT.
The Corporate Alternative Minimum Tax under the Inflation Reduction Act applies to applicable corporations with average annual adjusted financial statement income exceeding $1 billion over a three-year period. The CAMT rate is 15%, applied to adjusted financial statement income.
Corporations use Form 1118 – rather than Form 1116 – to claim the FTC at the corporate level.
The corporate AMT foreign tax credit under the CAMT is governed by Section 59, with limitation rules distinct from the individual AMT FTC.
The 2017 instructions for Form 1118 addressed the AMT foreign tax credit rules in effect before the Tax Cuts and Jobs Act eliminated the old corporate AMT.
Those instructions are now largely historical. Corporations subject to the CAMT should reference the current Form 4626 instructions and Section 59 for the applicable FTC rules.
Form 4626 computes both the corporate AMT and its foreign tax credit. Part IV of Form 4626 figures the CAMT foreign tax credit, pulling the domestic-corporation foreign tax total from Form 1118, Schedule B – so Form 1118 still feeds the calculation, but the CAMT credit itself is claimed on Form 4626.
Passive income category vs. general limitation income: AMT FTC basket rules
Expats with both foreign wages and foreign investment income must compute a separate AMT FTC limitation for each income basket, which can result in credits being trapped in one basket while AMT is owed in another.
The AMT FTC limitation is computed separately for each income category:
- Passive income basket – includes dividends, interest, royalties, and rental income from foreign sources. The AMT FTC for this basket is limited to the §904 fraction computed on passive-category AMTI.
- General limitation basket – covers foreign wages, salaries, and active business income. The AMT FTC for this basket uses the general-category AMTI fraction.
- No cross-basket offset – excess credits in one basket cannot offset AMT attributable to another basket. An expat with excess passive FTC and insufficient general FTC will still owe AMT on the general-category income.
- AMT-specific basket shifts – the AMTI adjustments can move income between categories. If the FEIE's §911(f) stacking rule changes the effective rate on passive vs. general foreign source income, the basket allocation under AMT may differ from the regular-tax allocation
- GILTI and foreign branch baskets – post-2017 law also separates GILTI (net CFC tested income) and foreign branch income into their own §904(d) categories, with no cross-basket offset against passive or general AMT liability either. Most wage-earning expats only deal with the general and passive baskets, but anyone with a CFC or foreign branch should check all four.
Dual-status taxpayers and AMT: Special considerations
Dual-status taxpayers cannot simply apply the full-year AMT exemption – their exemption and FTC limitation must be prorated based on the portion of the year they were US tax residents.
Dual-status taxpayers – those who are US residents for part of the year and nonresidents for the remainder – compute AMTI only on income subject to US tax during the resident period.
The AMT exemption is prorated accordingly, and the AMT FTC limitation must reflect only the foreign taxes and foreign source income from the resident portion.
See our TFX guide to dual-status alien filing for the full return-filing mechanics.
Tax treaty benefits and AMT: Can treaties override AMT?
Unlike regular income tax, the AMT is rarely overridden by US tax treaties, meaning expats in treaty countries cannot rely on treaty provisions to eliminate their AMT liability.
Treaty-sourced income may still generate creditable foreign tax that feeds into the AMT FTC calculation. The treaty itself, however, does not reduce or eliminate the AMT – it is a domestic minimum tax that operates independently of treaty commitments.
If you take a treaty-based return position that affects how income is sourced or taxed, you may need to disclose it on Form 8833, Treaty-Based Return Position Disclosure.
Expatriate tax planning strategies to minimize AMT exposure
The single most impactful AMT planning move for many expats is switching from the FEIE to the foreign tax credit, which lets foreign taxes offset AMT directly instead of only affecting your rate through the §911(f) stacking rule.
Five actionable strategies for reducing AMT:
- Evaluate switching from FEIE to FTC. The FEIE doesn't add anything to AMTI, but in a high-tax country the foreign tax credit can offset AMT liability directly, which the FEIE can't do. Compare both methods where your AMTI is otherwise close to or above the exemption.
- Time the recognition of preference items. If your AMTI is near the exemption phase-out range, deferring or accelerating certain income across tax years can keep you below the threshold in one or both years.
- Maximize creditable foreign taxes. Higher foreign tax payments increase the AMT FTC available to offset tentative minimum tax. Review whether you are claiming all creditable foreign taxes – including foreign taxes on passive income.
- Consider the simplified AMT FTC election. If the regular-tax and AMT FTC limitations are close, the election reduces compliance burden without increasing tax. Run both calculations first.
- Track minimum tax credit carryforwards on Form 8801. If you paid AMT in prior years, the MTC can offset future regular tax. Check Form 8801 before every filing.
See our TFX guide for self-employed expats on avoiding double taxation for additional planning considerations.
Common mistakes expats make with AMT and the foreign tax credit
The most common AMT mistake TFX sees is expats applying their regular-tax Form 1116 credit directly to Form 6251 without recomputing the limitation using AMTI-based foreign source income.
Six errors to avoid:
- Failing to file a separate Form 1116 for AMT. The AMT FTC requires its own Form 1116 with AMTI-based figures. Skipping it means no AMT FTC at all.
- Copying regular-tax FTC figures onto Form 6251. The §904 limitation must be recomputed using AMTI. The regular-tax figure is not transferable.
- Ignoring the FEIE stacking rule on Form 6251, line 7. The FEIE and housing exclusion aren't added back to AMTI, but claimants must still use the Foreign Earned Income Tax Worksheet to compute the tax on line 7 correctly. Skipping the worksheet understates the tax on any taxable excess.
- Not tracking the AMT FTC carryover separately. The AMT FTC carryover and the regular FTC carryover are separate schedules. Mixing them leads to double-counting or lost credits.
- Making the simplified election without analysis. The irrevocable election can increase tax if the regular-tax FTC limitation is lower than the AMT limitation would be.
- Overlooking the minimum tax credit on Form 8801. Expats who paid AMT in prior years may have an unused MTC that reduces current-year regular tax.
AMT foreign tax credit carryover: Rules and tracking
Expats who accumulate AMT FTC carryovers must maintain a separate carryover schedule for AMT purposes – mixing it with the regular FTC carryover is a common error that can result in double-counting or lost credits.
Unused AMT foreign tax credit carryover amounts – credits that exceeded the AMT FTC limitation in a given year – follow the standard 1-year-back, 10-year-forward rules. They must be tracked by income category, just like the regular FTC carryover, but on a separate schedule.
Each year, reconcile the AMT FTC carryover separately from the regular FTC carryover. The AMT FTC carryover is reported on the AMT-designated Form 1116 and feeds back into the Form 6251 calculation for the following year.
Both Form 1116 and Form 6251 must be coordinated annually. The regular Form 1116 feeds into Form 1040, while the AMT Form 1116 feeds into Form 6251. If carryovers exist in either system, both must be reconciled.
Frequently asked questions
The AMT FTC is a separate credit computed on AMTI rather than regular taxable income. It uses the same §904 limitation framework but applies it to AMTI-based foreign source income, which typically produces a smaller allowable credit. It is reported on a separate Form 1116 labeled for AMT.
Yes, if the AMT FTC is large enough to reduce tentative minimum tax below your regular tax. How does AMT affect the foreign tax credit? It recalculates the §904 limitation on AMTI, often shrinking the credit – but in high-tax countries, the AMT FTC can still fully offset tentative minimum tax.
Sometimes, but not because of an AMTI add-back. The FEIE excludes income from both regular taxable income and AMTI – it isn't added back on Form 6251. Expats who claim the FEIE can still owe AMT, but usually because of other preference items (ISOs, SALT add-back, private-activity-bond interest) or high non-excluded income, combined with the §911(f) stacking rule that sets the rate on any taxable excess.
The election under IRC Section 59 lets you use your regular-tax FTC limitation as a proxy for the AMT FTC limitation. It is irrevocable and only beneficial when the two limitations are close. Run both calculations before electing.
Both Form 1116 and Form 6251 work together. Prepare a separate Form 1116 using AMTI-based figures, then enter the resulting AMT FTC on Form 6251 Part II to reduce tentative minimum tax.
No. Excess AMT FTC carries back 1 year and forward 10 years within the same income category. Separately, if you pay AMT, the amount may generate a minimum tax credit carryforward under IRC §53, tracked on Form 8801.
The bona fide residence test determines FEIE eligibility, which indirectly affects AMT. If you qualify for and claim the FEIE, the excluded income is not added back to AMTI, but it is subject to the IRC §911(f) stacking rule when figuring tax on any taxable excess. If you fail the test and cannot claim the FEIE, the stacking rule does not apply, and AMT exposure may be lower.
Yes. AMT foreign tax credit special issues include tracking the carryover separately from the regular FTC, maintaining category-by-category records, and reconciling annually on the AMT-designated Form 1116. The carryforward period is 10 years.
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