How does Japan payroll tax work in 2026?

The four employer-side social insurance components in Japan:

The combined employer social insurance cost for a Tokyo office-based employer with a worker under 40 is commonly cited as approximately 15% to 16% of standard monthly remuneration. This figure varies and is not a single statutory rate, so it is not tokenised here. Use the Employer Cost Calculator for a Japan-specific estimate.

Contribution ceilings

Welfare pension contributions are capped at a standard monthly remuneration of JPY 650,000. Bonus contributions are capped at JPY 1,500,000 per bonus payment. Above those ceilings, no additional welfare pension contribution is owed. Health insurance has its own ceiling, which differs by insurer. There is no social insurance ceiling comparable to the UK upper earnings limit that halves the rate.

Contributions are calculated on standard monthly remuneration, which is a monthly pay grade set when the employee joins and reviewed each September. It does not change every month with actual pay. This means a month with a large variable payment does not automatically raise the social insurance deduction, though bonus contributions are calculated separately and also capped.

Social insurance contributions are deducted from gross pay each month and appear on the payslip alongside income tax. The employee takes home the net after all deductions.

The basic deduction and how Japan handles tax-free income

Japan does not use a flat personal allowance or a zero-rate band. Instead, a basic deduction (kiso kojo) reduces taxable income before the bracket schedule applies. For employees with total income under JPY 4,890,000, the basic deduction is JPY 1,040,000. Above that level the deduction phases down progressively and reaches zero above JPY 25,000,000 of total income. Employment income also attracts a separate salary income deduction that reduces gross employment income before the bracket schedule. The two deductions together mean many employees on average salaries pay far less than the headline bracket rates suggest.

Inhabitant tax

A 10% local inhabitant tax (住民税 juminzei) applies to income as assessed in the prior calendar year. Prefectural and municipal portions together total 10% for most taxpayers. Inhabitant tax is withheld from the following June payroll for one year after an annual filing. New employees in Japan pay it the year after they first file, so it arrives on the payslip with a one-year lag from the first year of employment.

Reconstruction surtax

A 2.1% reconstruction surtax applies on national income tax liability, not on taxable income. It is calculated by multiplying the national income tax figure by 2.1% and adding the result. The surtax runs until 2037 to fund Tohoku earthquake reconstruction. At the top national rate of 45%, the effective national rate including the surtax is approximately 45.945%.

Japan uses a withholding system for employed workers. The employer deducts income tax from the employee's gross pay each month and pays the amount to the tax office by the standard deadline.

Year-end adjustment

Japan's year-end adjustment (nenmatsu chosei) is the key annual payroll event. The employer reconciles the total income tax withheld during the year against the tax actually owed. Any overpayment is refunded via the December payroll. Any shortfall is collected. Employees who have a single employer and no side income do not file a personal tax return; the year-end adjustment replaces it. Only employees with multiple income sources, freelance income above JPY 200,000, or high earnings are required to file their own return in March.

Statutory pay frequency

Wages must be paid at least once a month on a fixed date, paid in full, paid directly to the employee, and paid in currency. These are the five payment principles under the Labor Standards Act. Monthly pay (12 times per year) is the norm. The Labor Standards Act does not prohibit more frequent pay; semi-monthly or bi-weekly cycles are uncommon but not illegal.

1. Collect monthly pay data

   Gather salary, overtime, bonuses, and any allowances for the pay period. Japan payroll uses the standard monthly remuneration grade for social insurance, not actual monthly pay.

2. Calculate gross pay and deductions

   Apply the income tax withholding tables to gross pay. Deduct employee social insurance contributions, including welfare pension and health insurance, from the gross amount.

3. Calculate employer contributions

   Calculate employer-side social insurance: welfare pension at 9.15%, health insurance at the applicable rate, employment insurance, and workers accident insurance at the industry rate.

4. Run the payslip and pay employees

   Pay net wages to each employee on the fixed pay date. Wages must be paid at least once a month on a set date under the Labor Standards Act.

5. Remit withheld tax to the tax office

   Pay the withheld income tax to the local tax office by the 10th of the following month. Employers with fewer than 10 employees may use the approved semi-annual remittance window.

6. Run the year-end adjustment in December

   Reconcile total income tax withheld for each employee against their actual annual liability. Refund any overpayment through the final payroll of the year. Issue certificates and year-end documents to employees.

Welfare pension is the largest single component of Japan's social insurance system. The split rate means that for every JPY 100 of pension contributions, the employer pays JPY 50 and the employee pays JPY 50. There is no minimum enrollment age threshold equivalent to the UK's 22-year rule. All employees covered by kosei nenkin are enrolled from the first day of employment regardless of age or earnings.

Health insurance and sickness benefit

Japan's compulsory health insurance (kenko hoken) also funds the injury and sickness allowance (k傷病手当金). If an employee cannot work due to illness or injury, they receive approximately two-thirds of their standard daily remuneration from the fourth day of absence. There is a three-day unpaid waiting period. The allowance can continue for up to 18 months from the first payment date.

Employment insurance (unemployment)

Employment insurance provides unemployment benefit when a worker leaves and is not at fault. The employer contribution is higher than the employee contribution. For general industries from April 2026, employers pay 0.95% and employees pay 0.5%. Both rates are included within the overall social insurance figures. There is no earnings ceiling for employment insurance.

Childcare leave and pay

Employees can take childcare leave (ikukyuu) until the child reaches one year of age, extended in some cases to two years. Pay during childcare leave is funded by employment insurance at approximately 67% of standard remuneration for the first 180 days, with a higher rate available from April 2025 when both parents take leave simultaneously. Mothers can take 14 weeks of maternity leave (six weeks before birth, eight weeks after). Fathers can take up to four weeks of postnatal childcare leave within the first eight weeks after birth.

Real HR and legal experts run your Japan payroll from offer letter through each monthly withholding remittance and year-end adjustment. An actual person handles your account. Japan's year-end nenmatsu chosei, the September standard remuneration grade review, and all five schemes in the social insurance stack are managed for you. There is no setup fee and no exit fee. Employer cost passes through at cost, itemised on every invoice so you see exactly what Japan's social insurance system charges.

If your Japan team grows to the point where a local entity makes sense, you can graduate from EOR to your own Japan entity without switching systems or losing employee records. EOR is the right model for a first Japan hire, until it isn't. Run the Employer Cost Calculator to see the Japan numbers before you make an offer. Start from the Japan hiring overview.

Key sources: PwC Tax Summaries: Japan income tax, PwC Tax Summaries: Japan social insurance, and JETRO: Withholding income tax in Japan.