Japan Payroll Insurance in 2026: A Practical Guide to Employee and Employer Contributions

If you work for a covered employer in Japan, social insurance is usually mandatory. Your employer normally deducts your share from your salary and pays it together with the employer’s share.

For a typical employee, the main deductions are:

• Employees’ Health Insurance
• Employees’ Pension Insurance
• Employment Insurance
• Long-Term Care Insurance if the employee is aged 40 to 64
• The Child and Childcare Support contribution introduced in April 2026

Health insurance and pension are generally split between the employee and employer. However, the two sides do not always pay the same total amount because employers also bear separate employment-related contributions.

This guide is for foreign employees, their families, and employers who need to understand a Japanese payslip or estimate the real cost of hiring someone. Rates and eligibility can depend on the insurer, prefectural branch, industry, workplace size, age, and employment conditions.

The short answer: who pays what in 2026?

The employee’s share is deducted from salary and, where applicable, bonuses. The employer adds its own share and sends the combined payment to the relevant authorities.

For fiscal year 2026, the main rates are:

• Employees’ Pension Insurance: 18.3% in total, normally divided equally—9.15% each
• Employees’ Health Insurance through Kyokai Kenpo: 9.90% national average, with the actual rate varying by prefectural branch and divided equally
• Long-Term Care Insurance: 1.62% in total for insured employees aged 40 to 64, divided equally
• Child and Childcare Support contribution: 0.23% from April 2026, divided equally
• Employment Insurance for a general business: 0.5% for the employee and 0.85% for the employer from April 2026
• Workers’ Accident Compensation Insurance: paid entirely by the employer; the rate depends on the industry
• Employer-only Child and Childcare contribution: 0.36% in fiscal year 2026

The health insurance figure above is only an average. An employer using Kyokai Kenpo applies the rate of its registered prefectural branch, which may not be the prefecture where the employee lives.

A ¥300,000 monthly salary example

The following simplified example shows why gross salary and take-home pay are different. It assumes:

• Standard Monthly Remuneration of ¥300,000
• Employment in a general business
• Kyokai Kenpo’s 2026 national-average health insurance rate of 9.90%
• No bonus in the month
• No income tax, resident tax, or other deductions included

Employee under age 40

• Employees’ Pension Insurance: ¥27,450
• Employees’ Health Insurance: ¥14,850
• Child and Childcare Support contribution: ¥345
• Employment Insurance: ¥1,500
• Estimated employee total: ¥44,145

The employee would have approximately ¥255,855 left before income tax, resident tax, and any company-specific deductions.

Employee aged 40 to 64

The employee also pays half of the 1.62% Long-Term Care Insurance contribution:

• Long-Term Care Insurance: ¥2,430
• Estimated employee total including long-term care: ¥46,575

This leaves approximately ¥253,425 before taxes and other deductions.

What the employer pays

For the employee under 40, the employer’s corresponding charges in this example include:

• Employees’ Pension Insurance: approximately ¥27,450
• Employees’ Health Insurance: approximately ¥14,850
• Child and Childcare Support contribution: approximately ¥345
• Employment Insurance: ¥2,550
• Employer-only Child and Childcare contribution: ¥1,080

That is approximately ¥46,275 above the employee’s gross salary, before Workers’ Accident Compensation Insurance and any other employer costs. For an employee aged 40 to 64, another approximately ¥2,430 is added for Long-Term Care Insurance.

Actual payroll amounts may differ because of the applicable prefectural rate, remuneration grade, rounding, insurer, age, industry, and payroll timing.

ここがポイント: A ¥300,000 salary does not mean contributions are always calculated from exactly ¥300,000 in cash earnings. Health insurance and pension use an official remuneration grade called Standard Monthly Remuneration.

Why deductions are not simply a percentage of this month’s pay

Japan does not recalculate health insurance and pension from every small monthly change. It first places the employee’s regular remuneration into an official band.

Standard Monthly Remuneration

Standard Monthly Remuneration, often abbreviated as SMR, generally includes compensation paid in return for work, such as:

• Basic salary
• Overtime pay
• Position and location allowances
• Commuting allowance
• Housing or family allowances paid by the employer
• Certain benefits provided in kind

A commuting allowance may be treated differently for income tax, but it can still be included when calculating social insurance remuneration. This is a common source of confusion.

The employer normally reports remuneration so that a regular SMR can be set through the annual calculation process. A substantial fixed-pay change may trigger an earlier revision after the required period and conditions are met.

This creates a delay: a raise or reduction in actual pay may not change the health insurance and pension deductions immediately.

Bonuses use a separate base

Covered bonuses are converted into a Standard Bonus Amount by rounding down to the nearest ¥1,000. The same applicable health insurance and pension rates are then applied, subject to statutory ceilings.

The Japan Pension Service states that the bonus ceiling is:

• ¥5.73 million in total per fiscal year for Employees’ Health Insurance
• ¥1.5 million per month for Employees’ Pension Insurance

Employment Insurance is generally calculated from actual covered wages rather than the SMR bands used for health insurance and pension.

Who must join employees’ social insurance?

Nationality is not the deciding factor. A foreign national who meets the coverage conditions is generally treated in the same way as a Japanese employee.

A regular employee, company officer, or representative working at a covered workplace normally joins Employees’ Health Insurance and Employees’ Pension Insurance. Enrollment is not usually an optional benefit that the employer or employee can decline.

Part-time and short-hours employees

A part-time employee generally qualifies if their weekly hours and monthly working days are at least three-quarters of those of a regular employee at the same workplace.

Even below that level, coverage generally applies when all of the following conditions are met:

• Scheduled work is at least 20 hours per week
• Employment is expected to continue for at least two months
• Monthly wages are at least ¥88,000
• The person is not a student, subject to limited exceptions
• The employer is a covered workplace with more than 50 regularly insured employees, or a smaller workplace that has voluntarily joined under the applicable procedure

These tests concern scheduled employment and statutory definitions. A single busy month does not by itself settle the question.

Employment Insurance has a different test

Employment Insurance is a separate system. A worker generally needs scheduled work of at least 20 hours per week and an expected employment period of at least 31 days.

A person can therefore be covered by Employment Insurance without meeting every condition for Employees’ Health Insurance and Employees’ Pension Insurance. Do not treat “social insurance” as one all-or-nothing test.

What changed in fiscal year 2026?

Two changes are especially visible on payroll from April 2026.

A new Child and Childcare Support contribution

The Child and Childcare Support system began with an insurance contribution rate of 0.23% for fiscal year 2026. For Kyokai Kenpo members, collection applies from the April 2026 insurance month, generally paid in May, and the amount is divided between employee and employer.

This is separate from the existing employer-only Child and Childcare contribution of 0.36%. The similar English names can cause confusion:

• The new 0.23% contribution is linked to health insurance and shared by employee and employer.
• The existing 0.36% contribution is paid entirely by the employer.

Employees should therefore expect a new payslip item or a slightly larger combined insurance deduction, depending on how the employer labels it.

Employment Insurance became slightly cheaper

For a general business, the total Employment Insurance rate fell to 1.35% for fiscal year 2026:

• Employee: 0.5%, down from 0.55%
• Employer: 0.85%, down from 0.9%

Agriculture, forestry, fisheries, sake brewing, and construction use different rates. Employees and employers should check the official 2026 table instead of applying the general-business rate automatically.

Health and long-term care rates also changed

Kyokai Kenpo’s average health insurance rate is 9.90% in fiscal year 2026, down from 10.00%. That national average does not predict every employee’s change because each prefectural branch has its own rate.

The Long-Term Care Insurance rate rose from 1.59% to 1.62%. It applies through the employee health insurance system to insured people aged 40 to 64.

Employer procedures and deadlines

The employer, not the employee, handles the main enrollment filing for Employees’ Health Insurance and Employees’ Pension Insurance.

The Japan Pension Service states that an employer must generally submit the enrollment application within five days after the employee becomes covered. Information commonly needed includes:

• Basic personal and employment details
• My Number or Basic Pension Number, as applicable
• Date of birth and start date
• Expected remuneration
• Dependent information and supporting documents, if family members will be added

The employer also reports bonuses, remuneration changes that meet the revision rules, dependent changes, maternity or childcare leave contribution exemptions, and loss of coverage after employment ends.

Monthly Employees’ Health Insurance and Employees’ Pension Insurance contributions are generally due by the last day of the following month. Payroll deductions may appear one month behind the insurance month depending on the employer’s deduction method.

Employees should ask payroll which month a deduction covers before concluding that the first or final payslip is wrong.

Covering family members as dependents

Eligible family members may be covered as health insurance dependents without a separate health insurance premium for each person. However, relationship, residence, financial support, and income requirements apply.

A common income guideline is annual income below ¥1.3 million. Important exceptions include:

• Below ¥1.8 million for a person aged 60 or older, or a person with a qualifying disability
• Below ¥1.5 million for a non-spouse dependent aged 19 to 22, under the rule applying to certifications from October 1, 2025

The person must also meet the relevant support test. For example, a dependent living separately generally needs income below the amount sent by the insured employee.

Tax dependency and health insurance dependency are different systems. Passing an income test for a tax deduction does not automatically make someone eligible as a health insurance dependent.

If a spouse or child begins regular work, increases working hours, or expects continuing income above the applicable threshold, report the change promptly. Waiting for an annual review can lead to retroactive cancellation and medical-cost adjustments.

Special cases for foreign employees

The same core coverage rules apply regardless of nationality, but international assignments and departure from Japan create additional questions.

Employees temporarily assigned from overseas

Japan has social security agreements with certain countries. Depending on the agreement and assignment conditions, a certificate of coverage may prevent double pension enrollment.

The result is country-specific. It may also distinguish pension coverage from health insurance, so an overseas employer should not assume that one certificate removes every Japanese obligation.

Employees leaving Japan permanently

A non-Japanese person who leaves Japan may qualify for a Lump-sum Withdrawal Payment from the Japanese pension system if the statutory conditions are met. Claiming it can affect pension coverage periods and the use of a social security agreement later.

This is a long-term financial decision, not simply a refund at the airport. Check the Japan Pension Service guidance and, when necessary, obtain professional advice before applying.

Employees leaving a job but staying in Japan

Employer health insurance and pension coverage normally end when employment ends. Depending on the next situation, the person may need to:

• Join a new employer’s insurance
• Apply for voluntary continuation of the former employee health insurance within the deadline
• Join National Health Insurance through the municipality
• Enroll in National Pension if aged 20 to 59 and not otherwise covered
• Become an eligible dependent of an insured family member

In fiscal year 2026, the National Pension contribution for a Category I member is ¥17,920 per month. National Health Insurance premiums are calculated locally and can depend on prior-year income and household circumstances, so there is no single nationwide replacement cost.

Common payroll mistakes and warning signs

Most differences have a technical explanation, but some deserve a prompt question to payroll.

Assuming gross salary is the calculation base

Check the listed SMR or remuneration grade. Allowances may be included, and the official band may differ from the cash salary in a particular month.

Expecting every rate to be exactly half

Pension, employee health insurance, the 2026 support contribution, and applicable long-term care insurance are generally shared. Employment Insurance is not an equal split, while Workers’ Accident Compensation Insurance and the existing 0.36% Child and Childcare contribution are employer-only.

Using the employee’s home prefecture for the health rate

For Kyokai Kenpo, the relevant branch is connected to the employer’s enrollment. It can differ from the employee’s residential address.

Confusing insurance with tax

Income tax and resident tax are separate from social insurance. Resident tax commonly reflects prior-year income, so a new resident or someone in a second year of work may see a major take-home-pay change even when insurance rates barely move.

Ignoring age-related changes

Long-Term Care Insurance normally begins through employee health insurance from age 40 and ends under this collection method at age 65. The exact payroll month can depend on the legal age-calculation rule and the employer’s deduction timing.

Missing enrollment or unexplained deductions

Ask the employer for:

• The name of the health insurer
• The applicable health insurance rate
• Your Standard Monthly Remuneration
• The insurance month covered by each deduction
• Confirmation that your pension record has been registered correctly

Employees can also review pension records through Nenkin Net. A missing payslip deduction does not necessarily mean there is no liability; delayed enrollment can result in later deductions for earlier months.

A practical checklist for employees

Before accepting an offer or reviewing a payslip, confirm:

• Whether the position is covered by employee health insurance and pension
• Whether the quoted salary is gross or net
• Which allowances are included in remuneration
• Whether bonuses are insured
• Which health insurance association or Kyokai Kenpo branch applies
• Whether Long-Term Care Insurance applies because of age
• Whether eligible family members can be registered as dependents
• When the first deduction will appear
• What must be done when the job ends

For a quick estimate in 2026, an employee under 40 in a general business can expect the pension, average Kyokai Kenpo health rate, support contribution, and Employment Insurance to consume roughly 14.7% of the relevant payroll base before tax. An employee aged 40 to 64 is closer to 15.5% after adding the average long-term care share.

Those percentages are orientation figures, not a substitute for the official contribution table. The next practical step is to identify the insurer and SMR on the employee’s own record; those two details explain most differences between a rough estimate and the actual payslip.

参照リンク

• Japan Pension Service: Enrollment in Employees’ Pension Insurance and Employees’ Health Insurance
• Japan Pension Service: Employees’ Pension Insurance contributions
• Japan Pension Service: Employment, job change, and retirement
• Japan Pension Service: Systems to enroll in when working in Japan
• Japan Pension Service: National Pension contributions
• Japan Pension Service: Fiscal year 2026 contribution tables
• Kyokai Kenpo: Fiscal year 2026 health insurance rates by prefecture
• Kyokai Kenpo: Fiscal year 2026 insurance-rate overview
• Kyokai Kenpo: Child and Childcare Support contribution
• Kyokai Kenpo: Long-Term Care Insurance contribution rate
• Kyokai Kenpo: Dependent-status income requirements
• Ministry of Health, Labour and Welfare: Fiscal year 2026 Employment Insurance rates
• Ministry of Health, Labour and Welfare: Fiscal year 2026 Workers’ Accident Compensation Insurance rates