Payroll in Japan is built around two systems that run in parallel: income tax withholding administered by the National Tax Agency, and social insurance administered through the Japan Pension Service and related schemes. Salaries are taxed at source each pay period, then reconciled through a year-end adjustment that, for most employees, replaces the need to file a tax return at all. Social insurance enrolment attaches to the employment itself. A foreign employer paying staff in Japan must run both systems correctly from the first payslip, whether through its own registered presence, a payroll provider, or an employer of record that carries the obligations as legal employer.
Withholding at source and the year-end adjustment
Employment income in Japan is subject to withholding at source: the employer deducts income tax from each salary payment and remits it to the tax office. The National Tax Agency's guidance explains that the year-end adjustment then reconciles the year's withholding against the employee's final liability, applying credits such as the special credit for housing loans, which is why most salaried employees never file a return. Where a return is required, the filing window runs from February 16 to March 15 of the following year. The employer's side of this, correct monthly withholding, timely remittance and a clean year-end adjustment, is the core of Japanese payroll and the part that fails first when it is run from abroad without local expertise.
Social insurance through the Japan Pension Service
Alongside tax, Japanese employment carries mandatory social insurance. The Japan Pension Service administers the public pension system, in which Employees' Pension Insurance covers workers of companies and the public sector on top of the National Pension base layer. Enrolment, contribution collection and record-keeping run through the employer, and health insurance, employment insurance and workers' accident compensation sit alongside as further employment-linked schemes. For foreign assignees there is a further layer worth knowing: Japan's social security agreements with a number of countries exist to eliminate dual coverage, avoiding contributions in two countries at once, and to totalise coverage periods across systems so contributions are not stranded.
Routes to running it: entity, provider or EOR
A company with a registered presence in Japan can run payroll directly or through a local payroll provider, keeping legal employer status and its obligations. A company with no Japanese entity cannot; its realistic route is an employer of record, whose Japanese entity employs the staff, withholds income tax, runs the year-end adjustment, enrols employees in pension, health and employment insurance and files with the authorities, invoicing salary costs plus a fee. When comparing EOR vendors for Japan, ask specifically how they handle the year-end adjustment, how employer social insurance costs are itemised on top of gross salary, and whether a social security agreement applies to any assignee. Nothing on this page is tax or legal advice; the National Tax Agency's and Japan Pension Service's rules control.
Questions people ask about payroll in japan
Do employees in Japan file their own tax returns?
Most salaried employees do not: tax is withheld at source and reconciled through the employer's year-end adjustment. Where a return is required, it is filed between February 16 and March 15 of the following year.
What social insurance does Japanese employment carry?
Employees' Pension Insurance covers company workers within the public pension system administered by the Japan Pension Service, with health insurance, employment insurance and workers' accident compensation alongside; enrolment and contributions run through the employer.
Can a foreign company pay staff in Japan without an entity?
Not as the compliant legal employer of local staff. The practical route without an entity is an employer of record, whose Japanese entity employs the workers, runs withholding and social insurance, and invoices you salary plus a fee.
What do social security agreements change for assignees?
Japan's agreements with partner countries are designed to eliminate dual coverage, so contributions are not paid in two systems at once, and to totalise coverage periods so pension records in both countries count toward benefits.