Paying Taxes in Taiwan as a Foreigner 2026: Filing & Deductions

We talked with 4 expats who filed Taiwan tax 2+ times + reviewed 2026 Ministry of Finance rules (residents > 183 days = progressive 5–40% / non-residents = 18% flat), and put together this tax guide. "183 days = resident + lower rate / less than = 18% flat" was the consistent threshold.

It is May, and your Taiwanese colleagues are all talking about filing their taxes. Your employer has been withholding something from your paycheck every month, but you have no idea if that is all you owe or if you need to do something else. Tax filing as a foreigner in Taiwan is not difficult once you understand two critical rules: the 183-day residency threshold and the difference between withholding and filing. This guide breaks it down.

Tax rules described here are for the 2025 tax year, filed in May 2026. Taiwan's tax year follows the calendar year (January 1 to December 31).

The 183-Day Rule: Resident vs. Non-Resident

This is the single most important tax concept for foreigners in Taiwan. Your tax rate and filing obligations change dramatically based on whether you spent 183 days or more in Taiwan during the tax year.

If you are a non-resident (under 183 days): Your employer withholds 18% of your salary as tax. If you are in Taiwan for fewer than 90 days, that withholding is your final tax — no filing needed. If you are here 90-182 days, you must file a tax return, but you are still taxed at the flat 18% rate. No deductions or exemptions are available to non-residents.

If you are a resident (183 days or more): You are taxed at the same progressive rates as Taiwanese citizens, from 5% to 40%. You can claim deductions and exemptions that significantly reduce your tax bill. Most full-year foreign workers are residents.

Counting days: Every day you are physically present in Taiwan counts, including arrival and departure days. The National Taxation Bureau can check your entry/exit records. Business trips and vacations abroad reduce your day count — keep track of this if you are near the 183-day boundary.

Taiwan Income Tax Rates for Residents (2025 Tax Year)

Taiwan uses a progressive tax system. Your taxable income is calculated after subtracting exemptions and deductions — which means your effective tax rate is much lower than the marginal rate.

Example: A foreigner earning 70,000 TWD per month (840,000 TWD annual gross) with standard deductions ends up with roughly 500,000-550,000 TWD in taxable income. That puts most of the income in the 5% bracket and a small portion in the 12% bracket — an effective tax rate of around 6-8%. Much lower than the 18% flat rate for non-residents.

Deductions and Exemptions You Can Claim

As a tax resident, you are entitled to the same deductions as Taiwanese citizens. These significantly reduce your tax bill.

Personal exemption: 97,000 TWD per person (for you). If you have dependents in Taiwan (spouse, children), each one adds another 97,000 TWD exemption.

Standard deduction: 131,000 TWD for single filers, 262,000 TWD for married filing jointly. Alternatively, you can itemize deductions if they exceed the standard amount.

Salary income deduction: This is an automatic 218,000 TWD deduction that every salaried worker gets. It is separate from the standard deduction — you get both.

Rent deduction: If you rent your apartment in Taiwan, you can deduct up to 180,000 TWD per year (15,000 TWD per month) when itemizing. You need your lease contract and proof of payment (bank transfers, receipts). This one deduction alone can save you 9,000-36,000 TWD in taxes depending on your bracket.

How to File Your Tax Return

Tax filing happens in May. The process is surprisingly straightforward once you have done it once.

Filing period: May 1 to May 31 each year, for the previous calendar year's income.

Where to file: You have three options: online through the eFiling system (recommended), in person at your local National Taxation Bureau office, or through a tax agent. The eFiling system has an English interface and works well for straightforward salary income.

What you need: Your ARC number (this is your tax ID), your NHI card or a citizen digital certificate (for online login), your withholding statement from your employer (they provide this by February), and receipts for any deductions you want to claim.

Step-by-step online filing:

1. Go to the tax filing website (tax.nat.gov.tw) in May
2. Log in with your NHI card + card reader, or the mobile phone verification method
3. The system pre-populates your income from your employer's reports
4. Review the pre-filled data and add any missing income
5. Choose standard deduction or itemized deduction (the system shows which saves more)
6. Submit and pay any remaining tax or confirm your refund

Paying additional tax: If you owe tax after withholding, you can pay at a convenience store (for amounts under 30,000 TWD), through bank transfer, credit card, or at the tax office. If you overpaid through withholding, the refund is deposited to your bank account within 1-3 months.

Gold Card Tax Benefits

If you hold a Gold Card and had no Taiwan tax residence in the 3 years before your Gold Card was issued, you qualify for a special tax benefit for your first 5 years.

How it works: Salary income exceeding 3,000,000 TWD per year receives a 50% exclusion from taxable income. In other words, only half of your salary above 3M TWD is taxed. For a foreigner earning 5,000,000 TWD per year, this saves roughly 300,000-400,000 TWD (9,500-12,650 USD) in annual taxes.

Overseas income: Gold Card holders who qualify for the special tax treatment can also exclude overseas income from taxation during the same 5-year period, as long as their total overseas income is under 1,000,000 TWD. This is a significant benefit for people with global income streams.

Common Mistakes Foreigners Make

Not filing because "my employer handles it": Your employer withholds tax from your paycheck, but that is not the same as filing your tax return. You still need to file in May to reconcile what was withheld against what you actually owe. If you were over-withheld (common in your first partial year), you get a refund.

Missing the 183-day calculation: If you arrived in Taiwan in July and worked through December, you might only have 184 days — just barely a resident. But if you took a 2-week vacation abroad in November, you might drop to 170 days, making you a non-resident with a much higher effective tax rate. Track your days carefully.

Not claiming the rent deduction: Many foreigners do not know they can deduct rent payments. If you pay 15,000 TWD or more per month in rent and you itemize, this is essentially free money back. Keep your lease and payment records.

Ignoring overseas income: As a Taiwan tax resident, you are technically required to report worldwide income if your overseas income exceeds 1,000,000 TWD per year and your total basic income (including overseas income) exceeds 7,500,000 TWD. Most foreign employees only have Taiwan salary income, so this does not apply, but freelancers and people with foreign investments should be aware.

When Taiwan Taxes Get Complicated

1 interviewee paid 18% flat for 6 years before realizing they qualified as resident. Their warning signs:

You stay < 183 days/year. 18% flat — no deductions.

You skip "tax filing". May filing required — penalties for non-filing.

You forget "foreign income". Resident expats may need to declare overseas income > 6.7M NT.

You expect "tax treaty saves all". US-Taiwan no treaty — Americans face dual taxation.

You ignore "FATCA" (Americans). Required + 10,000+ accounts overseas — fines for non-filing.

Real Case: Lisa (32, US-Taiwan tax 5 years)

Lisa, US citizen working in Taiwan 5 years. Tax setup: 1) Taiwan resident (180+ days) = pay Taiwan tax on global income. 2) US citizen = file US 1040 globally + foreign earned income exclusion (US$120,000) + tax credit. 3) FBAR for foreign accounts >$10,000 + Form 8938 + FATCA. 4) Hire dual tax CPA = NT$20,000-50,000 / year. "Worth it to avoid double taxation."

Lesson: US-Taiwan tax: file both countries + FEIE exclusion + foreign tax credit; FBAR/FATCA mandatory; dual tax CPA = NT$20-50K / year.

Frequently Asked Questions

Q: I arrived in Taiwan in September. Do I file taxes for the partial year?

Yes. You file in May of the following year, covering the period from your arrival through December 31. Your employer provides a withholding statement for the months you worked. Whether you are taxed as a resident or non-resident depends on whether you accumulated 183 days by December 31 — arriving in September means you likely have fewer than 183 days, so you would be taxed at the non-resident 18% flat rate for that first partial year. The following full year, assuming you stay, you will cross the 183-day threshold and qualify for the lower progressive rates.

Q: Can I file taxes jointly with my Taiwanese spouse?

Yes, and it is usually advantageous. Married couples can file jointly, which doubles the standard deduction to 262,000 TWD and allows income-splitting strategies that may lower your combined tax bracket. Both spouses' income and deductions are combined on one return. You need to be legally married and your spouse must have a ROC household registration.

Q: Do I need to pay taxes on income I earn outside of Taiwan?

It depends on your residency status and the amount. If you are a tax resident (183+ days) and your overseas income exceeds 1,000,000 TWD per year, AND your total basic income exceeds 7,500,000 TWD, then yes — overseas income is subject to Taiwan's Alternative Minimum Tax at 20%. For most foreign employees earning only a Taiwan salary, this does not apply. If you have significant foreign income, consult a tax professional.

Q: My employer withheld 18% all year but I was in Taiwan for more than 183 days. Can I get the difference back?

Yes, and this is exactly why filing matters. When you file as a resident, your actual tax rate on the first 590,000 TWD of taxable income is only 5%. After deductions and exemptions, many foreigners earning 50,000-80,000 TWD per month find their effective tax rate is 6-10% — well below the 18% that was withheld. The difference is refunded to your bank account, usually within 1-3 months of filing. For someone earning 70,000 TWD per month, this refund can be 50,000-80,000 TWD. Do not leave that money on the table.

Taiwan Tax 5-Step Plan

1. 183-day rule: Stay 183+ days = resident = progressive 5–40%.
2. Non-resident: 18% flat — withheld at source.
3. File in May: Online or office — Ministry of Finance e-tax.
4. Foreign income: > 6.7M NT triggers reporting for residents.
5. Americans = FATCA: File US taxes + Taiwan taxes + foreign account reporting.

延伸閱讀

• Taiwan Work Permit Guide 2026：Employment types that affect your tax status
• Taiwan NHI for Foreigners 2026：NHI premiums are tax-deductible
• Opening a Bank Account in Taiwan 2026：You need a bank account for refunds
• Living in Taiwan Complete Guide 2026：Overall cost of living context
• Taiwan Visa Types Explained 2026：How visa type affects tax residency