Taiwan vs Japan: does the take-home advantage change as salary rises?

Hold converted gross salary equal at each step

Choose several salary levels in the starting currency and convert each gross amount into the destination currency. At each row, compare the net produced by that pair of equivalent gross salaries.

The salary levels are illustrative local amounts, not earnings percentiles or market-pay benchmarks. A converted gross amount is a calculation input; it does not establish what the same role pays in the destination country.

Keep everything else fixed

Use the same stated resident profile within each country across all rows. Keep the model periods, 2026 and 2026, fixed as well. Change gross alone. Region, age, pension and insurance settings can also change the result, so keep them fixed when comparing salary levels.

Read tax bands alongside credits and contributions

A progressive income-tax rate usually applies within its band, rather than to all earlier income. Allowances and credits can change at other thresholds, while contribution ceilings can stop part of a deduction rising.

Compare taxes, credits and contributions between rows to find which amounts change. A widening net gap may involve several of these deductions; a headline tax rate alone does not explain it.

Separate levels from increments

Net divided by gross shows the share of the year’s salary retained. The increase in net divided by the increase in gross shows the share of an increase retained between two rows.

A country can have a larger net at the lower level but retain less of the next increase. The retained share over a wide interval is not a precise marginal rate at a single salary.

Avoid predicting a crossover from sparse rows

The table gives results at three salary levels. If the country with higher net changes between rows, calculate additional salaries within that interval to locate the change.

Check the relevant thresholds and settings before quoting a crossover salary. Rounding can affect a very small difference, so report the salary precision used in the calculation.

Calculate your own offer

Calculate the guaranteed gross in your offer separately. Use the nearest table rows to see how deductions change around that salary.

Compare employer benefits and household expenses separately. The table calculates net from equivalent gross amounts; it does not measure purchasing power or local market pay.

Before drawing a conclusion from salary levels

• Keep converted gross equal at every comparison level.
• Hold resident settings and model periods fixed.
• Read credits and contribution caps alongside income tax.
• Calculate your exact offer and verify any apparent crossover.

Adjust the assumptions

Open the comparison near your salary, enter the exact guaranteed gross and inspect the deductions responsible for the difference.

Sources and model coverage

What the estimate covers

The calculator estimates employment income using its supported country rules and selected inputs. Benefits, collective agreements and personal circumstances that are not modelled are excluded. Official rules determine your actual liability.

• Taiwan: For fully insured resident employees with twelve equal monthly salaries and standard deductions. Married means a spouse with no income. Excludes itemised deductions, preschool relief, bonuses, non-resident tax, overseas income and alternative minimum tax. For 2026, the TWD 220,000 basic living expense follows the Ministry of Finance’s August estimate (60% of the median disposable income), pending the official year-end announcement.
• Taiwan: Children must qualify as tax and health insurance dependents for the whole year. Health insurance counts up to three dependents, including a spouse with no income.
• Taiwan: Assumes joint assessment with a dependent spouse who has no income. Includes the spouse exemption, married standard deduction and health insurance dependent contribution.
• Taiwan: Ordinary purchases use 5% VAT. The grocery preset assumes 53% exempt unprocessed staples and 47% taxable processed food, based on DGBAS price-index weights. Fuel includes VAT only and excludes commodity taxes.
• Japan: Year-end adjustment (年末調整) approximation is used - final settlement figures may differ slightly from the payroll withholding shown.
• Japan: Resident tax (住民税) uses the standard 10% flat rate; ward/city-specific rates are not individually applied.

Official sources

Results depend on the stated model assumptions and source periods. They do not guarantee your final tax liability or cover every personal circumstance.

• 財政部 · 115年度綜合所得稅免稅額與扣除額
• 全民健康保險署 · 保險費計算
• 国税庁
• 日本年金機構
• Exchange rate