The Tax Election That Could Cost You $25,506

TL;DR

• Below $150K (single) or $166K (married filing jointly), FEIE and FTC produce identical tax bills. The method literally does not matter.

• Above those thresholds, FTC wins every time. At $250K, the gap is $25,506/year for a single filer.

• The crossover point is the same regardless of whether you move to Portugal or Spain, and regardless of tax regime (IFICI, Beckham Law, standard rates).

• You will almost certainly pay more total tax abroad, not less. The financial case for moving is cost of living, not taxes.

We built a decision matrix: 96 tax scenarios across 8 income levels, 3 filing statuses, and 4 tax regimes in Portugal and Spain. Every figure computed against the 2026 IRS brackets (Rev. Proc. 2025-32, including One Big Beautiful Bill adjustments), PwC’s analysis of Portugal’s 2026 State Budget, and Spain’s Agencia Tributaria IRPF tables.

Three findings stood out.

At $100,000 income, both methods produce the exact same combined tax. At $120,000, same. At $132,900 (the FEIE limit itself), same. The reason: below $150,000 single / $166,000 MFJ, the FEIE exclusion plus your standard deduction eliminates your entire US tax liability. The FTC does the same thing through a different mechanism. Same result.

If you are spending hours agonizing over this choice at $90,000 income, you can stop. Pick whichever is simpler to file — for most people, that is the FEIE.

What this means for you: The decision only matters if your income exceeds $150K single or $166K married. Below that, use the FEIE and move on.

The FEIE has a “stacking rule” that most expat tax content glosses over. When you exclude income, the IRS taxes your remaining earnings as if the excluded portion still fills the lowest brackets. Your income above $132,900 gets pushed into the 22-32% marginal rates instead of starting at 10%.

The FTC avoids this entirely. It credits your foreign taxes dollar-for-dollar against your US liability. Since Portuguese and Spanish tax rates exceed US rates at every income we tested, the credit wipes out your US bill completely.

The gap by income (single filer):

• $150,000: FTC saves $240/year

• $180,000: FTC saves $7,440/year

• $250,000: FTC saves $25,506/year

And here is the trap: if you elect the FEIE and later realize you should have chosen the FTC, the IRS imposes a five-year lockout before you can switch. At $180,000, that is potentially $37,200 in avoidable taxes over the lockout period.

What this means for you: If there is any chance your income will cross $150K during your time abroad, the FTC is the safer default. The lockout risk is asymmetric — you can always switch from FTC to FEIE the next year, but not the other way around.

This is the finding that reframes the entire conversation.

At $100,000, Portugal’s IFICI regime charges a 20.0% effective rate. Spain’s Beckham Law charges 24.0%. The US alone? 13.2%.

Even with the most favorable special tax regimes available, your total tax bill abroad exceeds what you would have paid staying in the US. The breakeven is roughly $250,000 under Portugal’s IFICI — and that is the best-case scenario.

The purpose of the FEIE and FTC is to prevent double taxation, not to create savings. Neither method reduces your foreign tax bill. They only determine how much additional US tax you owe on top.

The financial case for relocating to Portugal or Spain rests on cost-of-living differences — lower housing, food, healthcare — not on tax arbitrage. That matters because it changes what you should be optimizing for. Spend less time on the FEIE vs FTC question and more time on whether the move makes financial sense at your income and spending level.

What this means for you: If someone is selling the move to Portugal or Spain as a “tax play,” the 2026 numbers say otherwise. It can still be a strong financial move — but for cost-of-living reasons, not tax reasons.

The full 96-scenario matrix is at FEIE vs Foreign Tax Credit: The Complete Decision Matrix (2026). If you want to find your exact scenario without reading tables, we built an interactive calculator that runs the comparison for your income, filing status, and destination.

Country-specific deep dives: US-Portugal Financial Guide | US-Spain Financial Guide

Every figure sourced from IRS Rev. Proc. 2025-32, PwC Portugal’s 2026 State Budget analysis, and Spanish Agencia Tributaria IRPF tables.

-- Relocate Handbook Research Desk | Editorial policy