How the FEIE Affects Your Tax Rate on Non-Excluded Income

A common misconception about the Foreign Earned Income Exclusion is that excluding income simply removes it from the bottom of your income stack — in fact, the IRS uses a "stacking" rule that treats the exclusion as if it were the bottom of your income, taxing your remaining income at higher rates. For example, if you earned $150,000 in foreign earned income and excluded $126,500, the remaining $23,500 isn't taxed starting from $0 — it's taxed as if your income starts at $126,500, meaning it falls in a higher bracket than if you had no exclusion. This stacking rule matters most for expats who have US-source income in addition to foreign earned income, or for those with significant income above the exclusion limit. The stacking effect is one reason why some high-earning expats in high-tax countries choose the Foreign Tax Credit over the FEIE — the FTC often produces a lower effective rate when income significantly exceeds the FEIE limit. Running the math both ways in your specific situation is important before making the FEIE election.