The Core Filing Mechanics
Taiwan and the US both run calendar-year tax systems, simplifying reconciliation. Without a tax treaty to lean on, Americans here rely entirely on domestic-law mechanisms, the FEIE and the Foreign Tax Credit, for double-tax relief.
Form 1040 and the Automatic Extension
The standard deadline is April 15, with an automatic extension to June 15 for Americans abroad. Tax owed still accrues interest from April 15, so estimate and pay by then if you expect a balance due. A further extension to October 15 is available on request (Form 4868).
Form 2555 and Form 1116: Both Genuinely Useful
Unlike a zero-tax posting, Taiwan's real progressive tax system (5-40%) means both the FEIE (Form 2555) and Foreign Tax Credit (Form 1116) do real work here, depending on your income level. Most moderate salaries stay comfortably under the FEIE cap; higher earners benefit from modeling both.
Worked Example: A Taipei Tech Salary
An American engineer at a Taipei semiconductor firm earns NT$3,200,000 (about $105,000 USD), taxed at Taiwan's 30% resident bracket. He qualifies for the FEIE via Bona Fide Residence after his first full tax year, shielding his entire salary from US tax, since $105,000 stays under the $132,900 cap. If his salary later climbs past the cap due to bonuses, his accountant models adding the Foreign Tax Credit for the excess, backed by the real Taiwan tax he's already paying.
FBAR: FinCEN Form 114
Required if combined foreign account balances, Taiwanese bank accounts, investment accounts, exceed $10,000 USD at any point in the calendar year. Filed electronically, due April 15 with an automatic extension to October 15.
FATCA: Form 8938
A separate, higher threshold attached to your Form 1040: generally $200,000 in specified foreign assets at year-end (or $300,000 at any point) for a single filer abroad, doubled for married filing jointly.
Taiwanese Tax Filing for Residents
If you're a Taiwan tax resident (183+ days present), you'll also file an annual return with the National Taxation Bureau, typically in May for the prior calendar year, on worldwide income at progressive rates, with personal exemptions and deductions available (roughly NT$464,000 combined for a single employed resident in 2026).
Streamlined Compliance for Late Filers
If you've been in Taiwan for years without realizing citizenship-based US taxation still applied, the IRS Streamlined Foreign Offshore Procedures let you catch up on the last three years of returns and six years of FBARs without standard failure-to-file penalties, provided the omission was non-willful.