Singapore is one of the harder places to be a US taxpayer, not because the returns are complex but because the safety nets are missing. There is no US-Singapore income tax treaty and no totalization agreement, Singapore's low rates leave little Foreign Tax Credit to claim, and the CPF plus local unit trusts create reporting traps. The FEIE, not the Foreign Tax Credit, usually does the heavy lifting here.
US filing basics every American abroad must know
US citizens and green-card holders are taxed on worldwide income wherever they live, and usually must file Form 1040 once gross income exceeds the IRS threshold ($15,750 for single filers, $31,500 for married filing jointly, and $23,625 for head of household for 2025), even when no tax is ultimately due. The tools that reduce double taxation are the Foreign Earned Income Exclusion (FEIE, up to $130,000 for 2025 under IRC §911) and the Foreign Tax Credit. Neither is automatic. The FEIE requires a tax home in a foreign country plus either the bona fide residence test or 330 full days abroad in a 12-month period, and it reaches earned income only. The Foreign Tax Credit is figured separately for each income category under IRC §904 and is capped at the US tax on the foreign income in that category, so it reduces double taxation without guaranteeing that none remains.
Two reporting rules catch most filers in Singapore: the FBAR (FinCEN Form 114), required when foreign financial accounts exceed $10,000 in aggregate at any point in the year, and Form 8938 (FATCA) for specified foreign assets above the applicable threshold. Both can carry penalties even when no tax is owed. If you are behind, the Streamlined Filing Compliance Procedures are the usual path back for non-willful taxpayers. They run on two tracks: the foreign track carries no offshore penalty but requires meeting the program's non-residency test, and the domestic track carries a 5% offshore penalty but works through amended returns, so it does not fit someone who never filed at all. Tax and interest on the catch-up years are owed whichever route applies.
US tax treaty with Singapore
There is no comprehensive US-Singapore income tax treaty (only a narrow agreement on shipping and aircraft income), and there is no US-Singapore totalization agreement. Two practical consequences follow: there are no treaty tie-breaker or reduced-withholding benefits, and because Singapore's tax is low, the Foreign Tax Credit is often too small to cover US tax on income above the FEIE limit, so some US tax can actually be due.
CPF and US tax
The Central Provident Fund (CPF) is not a qualified retirement plan for US purposes. Employer contributions, employee contributions, and the interest CPF credits can be currently taxable on your US return depending on how the account is characterized, and there is no treaty to defer or exempt it. CPF balances count toward the $10,000 FBAR aggregate and can require Form 8938. (Quick answer on CPF taxation.)
Investments, property, and capital gains in Singapore
Singapore unit trusts and many locally marketed funds are PFICs for US purposes and can require Form 8621. Singapore does not tax most capital gains, but the US does, so a gain that is tax-free locally is still a reportable US capital gain with no foreign tax to credit against it.
Self-employment and companies in Singapore
A Singapore Pte Ltd is a controlled foreign corporation when US shareholders together own more than 50% of it by vote or by value, counting only those US shareholders who each own at least 10%. Where that test is met, Form 5471 and possible GILTI come into your US return, and Form 5471 has separate categories that can apply on control, on acquiring a stake that reaches 10%, on acquiring another 10% on top, on disposing of enough to drop below 10%, or on becoming a US person while already holding 10%, even without a CFC. Because there is no totalization agreement, self-employed Americans in Singapore generally owe US self-employment tax: 15.3% on 92.35% of net earnings, with the 12.4% Social Security portion stopping at the annual wage base ($176,100 for 2025) and the 2.9% Medicare portion uncapped, plus a further 0.9% Additional Medicare Tax on combined Medicare-taxed wages and self-employment income above $200,000 for a single, head-of-household or qualifying-surviving-spouse filer, $250,000 for a joint return, and $125,000 for married filing separately. It applies on top of any local obligations, and the FEIE does not reduce it.
Worked examples
Fund manager earning above the FEIE limit (2025)
Salary of SGD 280,000 (roughly USD 210,000). A filer with a tax home in Singapore who meets the 330-day physical presence test or the bona fide residence test excludes $130,000 for 2025 ($132,900 for 2026), leaving roughly $80,000 of wages exposed. Two things then limit the Foreign Tax Credit on that remainder. Singapore's rates are low to begin with, and the Singapore tax attributable to the excluded $130,000 cannot be credited at all under IRC section 911(d)(6), so only the share of Singapore tax tied to the unexcluded wages is available. A US balance can be owed. This is the opposite of high-tax countries, where the credit usually wipes out the US bill.
Founder running a Singapore Pte Ltd (2025)
Owning a controlling stake in a Pte Ltd triggers Form 5471 and can pull company profits into the US return through GILTI even when no dividend is paid. Salary the founder draws is foreign earned income (FEIE-eligible); profits left in the company are a separate, often surprising, US exposure.
Common mistakes for Americans in Singapore
- Assuming a treaty exists; Singapore has none, so there are no treaty tie-breakers or reduced withholding.
- Leaving CPF off the FBAR and Form 8938.
- Expecting the Foreign Tax Credit to cover US tax; Singapore's low rates often leave a US balance above the FEIE limit.
- Treating Singapore unit trusts as ordinary shares and skipping Form 8621 (PFIC).
- Forgetting US self-employment tax, which applies in full because there is no totalization agreement.
Singapore tax FAQ
Is there a US-Singapore tax treaty?
No. The United States and Singapore have no comprehensive income tax treaty, only a limited agreement covering shipping and aircraft income. There is also no totalization agreement, so US self-employment tax applies in full.
Can I owe US tax even though I live in low-tax Singapore?
Yes. The FEIE excludes $130,000 of earned income for 2025 ($132,900 for 2026) if you have a tax home in Singapore and meet the 330-day physical presence test or the bona fide residence test. Above that, the Foreign Tax Credit depends on Singapore tax actually paid, it excludes the tax attributable to the excluded income, and Singapore's rates are low, so US tax can be due on the excess. This is a common surprise for higher earners.
How is CPF treated on my US return?
CPF is not a qualified plan for US purposes. Contributions and credited interest can be currently taxable, and the balance is reportable on the FBAR and potentially Form 8938. There is no treaty to defer the income.
Do I pay US self-employment tax in Singapore?
Generally yes. Without a totalization agreement, self-employed Americans in Singapore owe US self-employment tax: 15.3% on 92.35% of net earnings, with the 12.4% Social Security portion stopping at the annual wage base ($176,100 for 2025) and the 2.9% Medicare portion uncapped. The Foreign Earned Income Exclusion does not reduce it.
Are Singapore investment funds a problem for US filers?
Often. Singapore unit trusts and similar pooled funds are usually PFICs, which can require Form 8621 and unfavorable default tax treatment unless a timely election is made.
Sources and last reviewed
- IRS, United States income tax treaties (A to Z) (verified 2026-06-06)
- SSA, international agreements overview (verified 2026-06-06)
- IRS, Foreign Earned Income Exclusion (verified 2026-06-06)
- IRS, About Form 8621 (PFIC) (verified 2026-06-06)
Reviewed by Ilya Fayerman, Esq. (NY Bar) on
Asia depth guide
For filing context specific to Singapore in APAC, see the dedicated guide on US Tax Asia, Singapore (separate site, complementary content).
Common services needed by expats in Singapore
Most Americans abroad in Singapore need help with at least one of the following core compliance areas, which frequently interact:
- US expat tax returns, Form 1040 with FEIE, FTC, treaty positions, and any required state returns.
- FBAR reporting, FinCEN Form 114 for foreign financial accounts exceeding $10,000 aggregate at any time during the year.
- Form 8938 (FATCA), IRS disclosure of specified foreign financial assets when thresholds are met.
- Streamlined catch-up filing, For eligible non-willful taxpayers with prior unfiled years.
Related country guides
- US expat tax in South Korea
- US expat tax in Japan
- US expat tax in Hong Kong
- US expat tax in Thailand
- US expat tax in Taiwan
- US expat tax in Philippines