Gross vs. Net Salary in Japan: What Gets Deducted and How Much
The "annual salary" in a job ad and the "take-home pay" you can actually use are different. This guide explains the income tax, resident tax, and social insurance deducted from gross pay, the rule that net is about 75–85% of gross, and a quick reference table by income.
Job ads in Japan often list a figure like "annual salary 5,000,000 yen." If you assume that is the money you can actually spend each month, your first payslip will be a surprise. The amount shown in a job offer is the gross salary (annual income), while the amount actually deposited into your bank account is the net (take-home) pay — and the two are very different. This article explains the difference between gross and net, what is deducted and how much, and rough net-pay estimates by income level.
Gross vs. net: what's the difference?
Annual income (gross) is the total of your base pay, allowances, and bonuses before taxes and social insurance are taken out. Take-home pay (disposable income) is what remains after income tax, resident tax, and social insurance are deducted — the money you can actually use.
Net pay = Gross salary − Social insurance − Income tax − Resident tax
So between a job ad's "5,000,000 yen" and what you can actually live on, the gap can be tens of thousands to nearly a million yen. When planning your household budget or loan repayments, always think in net terms. To see concrete numbers, enter your salary in the take-home pay calculator.
The three things deducted from your salary
Deductions fall into social insurance and taxes (income tax and resident tax). Let's look at each in turn.
Social insurance
For employees, social insurance has the biggest impact on take-home pay. The main items are:
- Health insurance: keeps your medical co-pay low. People aged 40+ also pay nursing-care insurance. The employee share is roughly 5% of salary.
- Employees' pension: funds future pensions. The rate is fixed at 18.3%, split evenly, so the employee pays 9.15% — the largest single deduction.
- Employment insurance: funds unemployment benefits. The employee share is a small 0.5–0.6%.
Together, the employee's social insurance burden is often around 15% of gross — frequently larger than taxes. These are not simply "taken away"; they fund medical care, pensions, and unemployment support.
Income tax
Income tax is a national tax on your yearly income. It is progressive, ranging from 5% to 45% as income rises. It is withheld monthly as an estimate and reconciled in the year-end adjustment.
Resident tax
Resident tax is paid to your prefecture and municipality. The key feature is that it is based on the previous year's income — roughly 10% plus a flat portion. This is why new workers pay none in year one but see deductions begin in year two, lowering their take-home pay.
Net pay is about 75–85% of gross
As a general guide, an employee's take-home pay usually falls between 75% and 85% of gross. The rate is higher at lower incomes (around 85%) and falls as income rises, due to progressive tax and social insurance. Above 10 million yen it can drop below 75%.
- Dependents: spouse and dependent deductions reduce taxable income and raise net pay.
- Age: those 40+ add nursing-care insurance, slightly lowering net pay.
- Deductions: iDeCo, life insurance premiums and similar lower taxable income.
Bonuses also differ between gross and net. No resident tax applies to bonuses, so the net rate is a bit higher, but social insurance and income tax still apply. To estimate a bonus, use the bonus take-home calculator.
Net pay by income: a quick reference
The table below assumes a single person under 40 with standard conditions. Actual figures vary by dependents, location, and deductions, so treat it as a rough feel.
| Gross annual income | Approx. net | Approx. net rate |
|---|---|---|
| ¥3,000,000 | ~¥2,350,000–2,400,000 | ~80% |
| ¥4,000,000 | ~¥3,100,000–3,200,000 | ~79% |
| ¥5,000,000 | ~¥3,850,000–3,950,000 | ~78% |
| ¥6,000,000 | ~¥4,550,000–4,650,000 | ~77% |
| ¥8,000,000 | ~¥5,900,000–6,100,000 | ~75% |
| ¥10,000,000 | ~¥7,200,000–7,400,000 | ~73% |
For your own conditions, enter your salary and dependents in the take-home pay calculator for an estimated breakdown of social insurance, income tax, and resident tax.
Understanding deductions changes your net pay
The concept of deductions is key to increasing net pay (i.e., reducing taxable income). A deduction is an amount subtracted from the income that tax is calculated on. Main types include:
- Basic deduction: available to anyone below an income threshold.
- Employment income deduction: an automatic "deemed expense" based on salary.
- Social insurance deduction: premiums paid are fully deductible.
- Spouse / dependent deductions: for supporting family members.
- Life insurance, iDeCo, and medical expense deductions: claimable via filing or year-end adjustment.
Claiming these lowers taxable income, reducing income and resident tax and raising net pay. This is exactly why furusato nozei and iDeCo are described as "tax-saving."
Note: This is general information about gross vs. net pay, taxes, and social insurance. Rates and deduction rules change by year, region, and personal situation, and the figures here are estimates. For exact amounts and personal advice, consult your payroll department, local government, official sources (National Tax Agency, Japan Pension Service), or a licensed tax professional.
FAQ
What is the difference between gross and net salary?
Gross is the total pay before taxes and social insurance; net (take-home) is what remains after income tax, resident tax, and social insurance are deducted — the money you can actually spend. The job-ad figure and your usable income differ a lot.
Roughly what percentage of gross do I take home?
Generally about 75–85% of gross. The rate is higher at lower incomes and falls as income rises, due to progressive income tax and social insurance.
What is deducted from gross pay?
Mainly social insurance (health, employees' pension, employment insurance) and taxes (income tax and resident tax). For employees, the social insurance share is often around 15% of gross — frequently larger than taxes.
Why does my take-home pay drop in my second working year?
Resident tax is based on the previous year's income. With no income in year one, no resident tax applies; deductions begin in year two, so net pay falls even if your salary is unchanged.
How can I increase my take-home pay?
Use deductions to lower taxable income. Beyond social insurance and spouse/dependent deductions, options like iDeCo, life insurance premium deductions, and furusato nozei can reduce income and resident tax, raising your net pay.