Japan and China are Asia's two largest economies and home to large expat professional communities β€” but their tax systems differ significantly in structure and outcome. Japan's national income tax (5–45%) plus 10% local inhabitant tax produces a combined top rate of 55%, with substantial social insurance contributions (~14.4% employee). At comparable USD-equivalent salaries, Japan's total effective deduction is typically 5–10 percentage points higher than China's. China's IIT (3–45% progressive) combined with Five Insurances and Housing Fund contributions (~15.5% employee) produces effective total rates of 28–38% at typical professional salary levels. For expats at mid-level salaries ($80,000–$120,000), China generally produces more take-home than Japan. Japan counters with strong employment protections, a stable yen-denominated salary environment, and world-class quality of life in Tokyo and Osaka.

By Daniel, Founder of CountryTaxCalc

Daniel has spent 5+ years researching tax systems across 95+ countries and all US states to make tax comparison accessible to everyone. For corrections, contact us.

Last Updated: April 2026

The Big Picture

πŸ‡―πŸ‡΅ Japan

55%

Combined Top Rate

45% national + 10% local inhabitant tax

πŸ‡¨πŸ‡³ China

45%

Top Rate (above CNY 960,000)

Plus Five Insurances + Housing Fund ~15.5% employee

Typical Annual Savings

At $100,000 income:

$8,000

That is $667/month back in your pocket!

Tax Savings by Income Level

IncomeJP TaxCN TaxSavings10-Year
$50,000 (~Β₯8M / ~CNY 360K) ~Β₯960K national tax + ~Β₯520K local + ~Β₯1,100K social = ~Β₯2,580K (~32%)~CNY 52,500 IIT + ~CNY 55,800 social = ~CNY 108,300 (~30%)Similar (within 2%)$10,000
$80,000 (~Β₯12.8M / ~CNY 576K) ~Β₯2,080K national tax + ~Β₯900K local + ~Β₯1,320K social = ~Β₯4,300K (~34%)~CNY 113,000 IIT + ~CNY 71,000 social = ~CNY 184,000 (~32%)China saves ~$3,000$30,000
$100,000 (~Β₯16M / ~CNY 720K) ~Β₯3,040K national tax + ~Β₯1,180K local + ~Β₯1,420K social = ~Β₯5,640K (~35%)~CNY 167,000 IIT + ~CNY 80,000 social = ~CNY 247,000 (~34%)China saves ~$4,000$40,000
$150,000 (~Β₯24M / ~CNY 1,080K) ~Β₯5,760K national tax + ~Β₯1,860K local + ~Β₯1,560K social (capped) = ~Β₯9,180K (~38%)~CNY 315,000 IIT + ~CNY 88,000 social (capped) = ~CNY 403,000 (~37%)Similar (within 1–2%)$15,000
$200,000 (~Β₯32M / ~CNY 1,440K) ~Β₯9,200K national tax + ~Β₯2,590K local + ~Β₯1,560K social (capped) = ~Β₯13,350K (~42%)~CNY 489,000 IIT + ~CNY 88,000 social (capped) = ~CNY 577,000 (~40%)China saves ~$5,000$50,000
πŸ’‘

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Japan Pros and Cons

βœ… Pros

  • Employment income deduction (kyuyo shotoku koujyo): Japan's substantial employment income deduction reduces taxable income significantly β€” at Β₯10M salary, the deduction is Β₯1.95M, meaningfully lowering effective rates
  • Stable yen-denominated salaries and strong labour protections: Japan's employment law provides some of Asia's strongest worker protections β€” effectively permanent employment contracts at large corporations
  • No foreign-source income tax for non-permanent residents: expats who have not been Japanese tax residents for 5+ of the last 10 years are non-permanent residents β€” foreign-source income not remitted to Japan is generally untaxed
  • World-class quality of life: Tokyo, Osaka, and Kyoto consistently rank among the world's most liveable cities β€” safety, infrastructure, food quality, and public services are exceptional

❌ Cons

  • Combined top rate of 55% (45% national + 10% local) from approximately Β₯40M ($250K) β€” among the highest in Asia
  • Employee social insurance ~14.4%: pension 9.15%, health ~5.02%, employment insurance 0.6% β€” adds substantially above income tax
  • Once permanent resident (5+ of last 10 years in Japan), worldwide income is taxable in Japan including foreign investment returns, offshore assets, and foreign pensions
  • Japanese tax filing (kakutei shinkoku) is required for most expats with non-employment income β€” complex process without a Japanese tax accountant (zeirishi)

China Pros and Cons

βœ… Pros

  • Lower effective income tax at mid-professional salaries: China's IIT combined with social caps produces slightly lower total deductions than Japan at $80,000–$150,000
  • Foreigner-specific allowances: pre-2022, foreign professionals could claim housing, meals, and language training as tax-free allowances β€” partially reduced post-reform but advisory positions remain
  • Six-year foreign income exemption: foreign nationals who have been Chinese tax residents for less than 6 consecutive years are generally not taxed on foreign-source income not remitted to China
  • Rapidly growing economy: career acceleration and compensation growth in China's tech, finance, and manufacturing sectors can outpace equivalent Japan roles

❌ Cons

  • After 6 consecutive years as Chinese tax resident, worldwide income becomes taxable β€” significant for expats with global portfolios or foreign business interests
  • Five Insurances and Housing Fund: employee contributions of approximately 15.5% (pension 8%, medical 2%, unemployment 0.5%, housing fund 5%) on top of income tax
  • RMB is not freely convertible: salary remittance restrictions, annual $50,000 personal foreign exchange quota, and capital controls make moving large sums offshore complex
  • Regulatory and political risk: evolving compliance requirements, visa rules, and the broader geopolitical environment add uncertainty for long-term expat planning in China

Frequently Asked Questions

Q: How does Japan's inhabitant tax work?

Japan's inhabitant tax (jΕ«minzei) is a 10% flat tax on income levied by prefectures (4%) and municipalities (6%), in addition to national income tax. It is calculated on the prior year's income and paid in installments the following year β€” meaning new arrivals pay no inhabitant tax in their first year but face a double payment in year two. At Β₯10M salary, inhabitant tax is approximately Β₯700,000–Β₯900,000/year. It applies to all residents registered in Japan on January 1 of the assessment year.

Q: What changed for foreign expats in China after the 2022 IIT reform?

Prior to 2022, foreign professionals in China could claim tax-free allowances for housing, meals, language training, children's education, and home leave β€” reducing taxable income substantially. The 2019–2022 reform phased out most of these foreigner-specific allowances, bringing foreign nationals under the same individual deduction system as Chinese nationals (standard deduction CNY 60,000/year plus additional deductions for education, housing loan interest, etc.). The transition effectively increased the tax burden for many mid-to-high earning expats. Some allowances for specific visa categories and treaty provisions remain, but the broad foreigner advantage is significantly reduced.

Q: Is Japan or China better for a 2–3 year expat assignment?

For short-term assignments (under 5 years in Japan, under 6 years in China), both countries' non-resident or limited residency rules can shelter foreign-source income. Japan's non-permanent resident status (under 5 of last 10 years) means foreign-source income not remitted to Japan is untaxed β€” very valuable for expats with offshore investments. China's 6-year rule is similarly generous for shorter assignments. On pure take-home from local salary: China is marginally cheaper at $80,000–$120,000. Japan offers superior quality of life, stability, and career brand for most Western professionals. For investment banking and tech at high salaries ($150K+), the gap narrows and Japan's non-permanent resident protection becomes more valuable.

Q: How are social insurance contributions structured in Japan?

Japanese employees contribute to four main social insurance schemes: Kosei Nenkin (employees' pension) at 9.15% of standard monthly remuneration; Kenpo (health insurance) at approximately 5.02% (varies by health association); Koyo Hoken (employment insurance) at 0.6%; and from age 40, Kaigo Hoken (long-term care insurance) at approximately 0.9%. Total employee contributions are approximately 14.4–15.3% of salary. There are contribution ceilings: the pension ceiling is approximately Β₯650,000/month standard remuneration; health insurance ceilings vary. At annual salary of Β₯15M, the effective social contribution rate falls to approximately 8–10% due to these caps.

Q: Do US expats in Japan or China need to file US tax returns?

Yes β€” US citizens and Green Card holders must file US federal returns regardless of where they live. Both Japan and China have tax treaties with the US that prevent double taxation. Japan's relatively high rates (35–42% effective at higher incomes) often generate excess foreign tax credits, eliminating US tax liability. China's lower effective rates at mid-incomes may leave residual US tax liability after the Foreign Tax Credit. FBAR is required if total foreign financial accounts exceed $10,000. For Japan specifically, the Japan-US treaty has specific provisions for pension income and social security. US expats in both countries benefit from specialist preparation by firms familiar with Asian treaty positions.

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