The Basic Formula for Taiwan Salary Tax

Taiwan taxes your salary through two separate systems: personal income tax (calculated on your annual earnings) and health insurance premiums (deducted monthly). Your employer withholds both from your paycheck, so you do not pay them separately. The income tax itself uses a progressive rate structure—meaning higher earners pay a higher percentage—with rates ranging from 5% to 40% depending on your total annual income.

To calculate what you owe, you start with your gross annual salary, subtract deductions the tax authority allows, and then explore the rate that matches your income bracket. The result is your total tax for the year. If your employer has withheld too much, you receive a refund when you file your annual return. If too little was withheld, you owe the difference.

The process differs slightly depending on whether you are a resident of Taiwan (taxed on worldwide income) or a non-resident (taxed only on Taiwan-source income). Most foreign workers and recent arrivals are classified as non-residents for tax purposes until they meet the residency test.

Key Takeaways

  • Taiwan income tax rates range from 5% to 40% based on your annual income bracket, and your employer withholds the estimated amount from each paycheck.
  • You subtract the standard deduction (currently NT$188,000 for most taxpayers) from your gross salary before calculating the tax you owe.
  • Non-residents pay tax only on income earned in Taiwan, while residents pay tax on worldwide income, and the classification depends on how long you have lived in Taiwan.
  • Health insurance premiums are deducted separately from income tax and are calculated as a percentage of your salary, with both you and your employer contributing.
  • You file your annual tax return between May and June each year, and the tax authority will refund overpayment or bill you for any shortfall.

Understanding Taiwan's Income Tax Brackets

Taiwan uses five income tax brackets. The rate you pay depends on your total taxable income for the calendar year, not your monthly salary. For the 2024 tax year, the brackets are: 5% on income up to NT$540,000; 12% on income from NT$540,001 to NT$1,210,000; 20% on income from NT$1,210,001 to NT$1,945,000; 30% on income from NT$1,945,001 to NT$2,440,000; and 40% on income above NT$2,440,000.

The brackets are adjusted annually, so the thresholds you see this year may shift next year. The tax authority publishes updated brackets each January. Because the system is progressive, you do not pay the top rate on all your income—only on the portion that falls within each bracket. For example, if you earn NT$600,000 in a year, you pay 5% on the first NT$540,000 and 12% only on the remaining NT$60,000.

Your employer typically withholds tax based on an estimate of your annual income. If your actual income falls into a different bracket than expected, or if you have other income sources, the amount withheld may not match what you actually owe. This is why most people file a return in May or June to reconcile the difference.

Calculating Your Taxable Income

Your taxable income is not the same as your gross salary. You begin with your total salary for the year, then subtract the standard deduction. For 2024, the standard deduction is NT$188,000 for most individual taxpayers. If you are married and file jointly with your spouse, you each receive the deduction—so a married couple filing together subtracts NT$376,000 from their combined income.

You may also subtract certain expenses if you itemize rather than take the standard deduction. These include professional fees, union dues, and donations to registered charities. However, most salaried workers find the standard deduction more beneficial because it requires no documentation. You straightforward subtract the fixed amount and move to the next step.

Once you have subtracted the standard deduction, the remaining amount is your taxable income. explore the appropriate tax bracket rate to this figure, and you have your income tax liability for the year. If you have other income—such as rental income, investment gains, or freelance work—those are taxed separately under different rules and added to your total tax bill.

How Your Employer Withholds Tax Monthly

Your employer does not wait until the end of the year to collect tax. Instead, they estimate your annual income based on your monthly salary and withhold a portion of each paycheck. The amount withheld is sent to the tax authority on your behalf throughout the year. This system is called pay-as-you-earn withholding.

The withholding calculation assumes your monthly salary will remain constant for all 12 months. If you receive a bonus, overtime pay, or a salary increase partway through the year, the withholding may not account for these changes. Your employer should adjust the withholding rate if your circumstances change significantly, but this does not always happen automatically. You may need to request an adjustment if you know you will earn substantially more or less than expected.

The amount withheld appears on your monthly payslip. Most employers in Taiwan show the gross salary, the income tax withheld, the health insurance premium deducted, and the net amount you receive. Keep these payslips because you will need them when you file your annual return to verify how much was withheld.

Health Insurance Premiums and Other Deductions

In addition to income tax, your salary is reduced by National Health Insurance premiums. These are not income tax, but they are deducted from your paycheck in the same way. The premium is calculated as a percentage of your salary—currently 2.11% for employees—and both you and your employer contribute. Your portion is deducted from your gross pay before you receive it.

You may also have labor insurance deducted if you are covered under Taiwan's labor insurance system. This is typically 0.5% to 1.25% of your salary, depending on your industry and risk category. Like health insurance, both you and your employer contribute, and your share is withheld from your paycheck.

These insurance premiums are separate from income tax and are not deductible when you calculate your taxable income. They are mandatory deductions that reduce your take-home pay but do not lower the income amount on which tax is calculated. A typical payslip shows income tax, health insurance, labor insurance, and any voluntary deductions (such as pension contributions) all listed separately.

Resident Versus Non-Resident Tax Status

Taiwan distinguishes between residents and non-residents for tax purposes. A resident is someone who has lived in Taiwan for more than 183 days in a calendar year, or who has a household registration (hukou) in Taiwan. Residents pay income tax on all income earned anywhere in the world. A non-resident pays tax only on income earned within Taiwan.

Most foreign workers are classified as non-residents when they first arrive, even if they work full-time for a Taiwan employer. You remain a non-resident until you meet the 183-day threshold or establish household registration. Once you cross into resident status, your tax situation changes—you must report worldwide income, which may include salary from overseas employers, rental income from property outside Taiwan, and investment income from foreign accounts.

Your employer should know your residency status and withhold accordingly. If you are a non-resident, only your Taiwan-source income is subject to withholding. If you become a resident partway through the year, you may need to file an amended return or adjust your withholding for the remainder of the year. The tax authority's website and most accounting firms can help you determine your status if you are uncertain.

Filing Your Annual Tax Return

Every year between May and June, you must file an annual income tax return with the National Tax Bureau. You can file online through the tax authority's website, by mail, or in person at a local tax office. Most people file online using their citizen ID number and a password, or through a tax filing service provider.

When you file, you report your total income for the calendar year (January through December), list all sources of income, claim deductions, and calculate your final tax liability. The tax authority compares this to the amount your employer withheld throughout the year. If you withheld more than you owe, you receive a refund. If you withheld less, you owe the difference and must pay it by the important date (usually in August).

You will need your payslips from all employers, documentation of any other income, and records of deductible expenses if you itemize. The filing important date is typically June 1, though the exact date shifts slightly each year. Filing late results in penalties and interest, so mark the date on your calendar. If you are unsure how to file, many tax offices offer free consultation, and some employers provide information to their staff.

Common Mistakes to Avoid

One frequent error is assuming your monthly withholding equals your actual tax liability. Because the brackets are annual, your final tax may be higher or lower depending on your total year-end income. If you received a large bonus in December, for example, your withholding throughout the year may not have accounted for it, and you could owe additional tax when you file.

Another mistake is forgetting to report income from multiple employers or side work. If you worked for two companies in the same year, both will withhold tax based on their portion of your salary alone. When you file your annual return, the tax authority sees your combined income and may determine you owe more tax because your total crossed into a higher bracket. Report all income sources on your return to avoid penalties.

Non-residents sometimes overlook the distinction between Taiwan-source and foreign-source income. If you are a non-resident and you receive a salary transfer from an overseas parent company, that income may not be subject to Taiwan tax—but you must declare it on your return and explain why it is not taxable. Failing to report it, even if it is not taxable, can trigger an audit.

Frequently Asked Questions

What is the difference between my gross salary and my taxable income?

Your gross salary is the total amount your employer pays you before any deductions. Your taxable income is your gross salary minus the standard deduction (NT$188,000 for 2024). Income tax is calculated on your taxable income, not your gross salary. Health insurance and labor insurance premiums are deducted from your gross pay but do not reduce the amount on which income tax is calculated.

If I worked in Taiwan for only part of the year, do I still file a tax return?

Yes. You file a return for any calendar year in which you earned Taiwan-source income, regardless of how many months you worked. Your taxable income is calculated on an annual basis, so even if you worked only three months, you report that income and pay tax according to the bracket it falls into. If too much was withheld, you will receive a refund.

Can I reduce my taxable income by contributing to a retirement account?

Contributions to a labor pension (the mandatory employer-sponsored plan) are deducted from your salary before income tax is calculated, so they do reduce your taxable income. Voluntary contributions to other retirement accounts may not be deductible. Check with your employer or a tax professional about which retirement savings are tax-deductible in your situation.

What happens if I do not file my tax return by the important date?

The tax authority will assess your tax based on the information they have (usually your employer's withholding records). If you owe additional tax, you will be billed with a late-filing penalty of 1% to 15% of the unpaid amount, plus interest. Filing late also delays any refund you might be owed. It is better to file on time even if you cannot pay the full amount owed—you can arrange a payment plan.

How do I know if I am a resident or non-resident for tax purposes?

You are a resident if you have lived in Taiwan for more than 183 days in the calendar year or if you have household registration (hukou) in Taiwan. You are a non-resident if neither condition is met. If you are unsure, contact your local tax office or ask your employer's accounting department. Your status can change from year to year depending on how many days you spend in Taiwan.