Compute Take-Home Pay From Japan's Withholding Tax Slip

Computing your take-home annual pay from the gensen choshuhyo (withholding tax slip) — the number written nowhere on it

Negotiating terms for a new job, planning mortgage repayments, reviewing the household budget. If someone asked "What is your take-home annual pay?", could you answer on the spot? In fact, no field anywhere on the withholding slip says "take-home". On top of that, the slip does not show resident tax, so the document is designed in a way that staring at the printed figures alone will never get you to your take-home pay. This article walks through how to compute take-home annual pay from four numbers on the withholding slip, with a worked example using actual figures.

Only four numbers are needed

Of the amounts printed across the top of the withholding slip, the take-home calculation directly uses the following three, plus resident tax. Each field is explained in detail in our guide to reading the withholding slip.

Where to find your resident tax — the notice, or a 10% estimate

Resident tax appears not on the withholding slip but on the resident tax decision notice distributed through your employer around June each year (how to read the notice). If you do not have it at hand, the following estimate is accurate enough for practical purposes.

The "+¥50,000" is a rough correction for the fact that the basic deduction for resident tax is ¥50,000 smaller than for income tax. The exact mechanism is covered in how resident tax works and is calculated, but if your goal is knowing your take-home pay, the estimate is fine. One caveat: resident tax is levied the following year on the previous year's income, so in a year when your income changes sharply — or in your first year in the workforce — the resident tax being deducted now and the resident tax on this year's income will not match.

Worked example: gross pay of ¥4.5 million

Take a company employee living alone whose withholding slip reads as follows.

How to increase the take-home pay you just computed

Once you know your take-home pay, the next step is increasing it. Three levers can move a take-home figure based on the withholding slip: (1) increase income deductions (iDeCo, furusato nozei hometown-tax donations, the medical expense deduction and so on); (2) understand how social insurance premiums are determined (how the standard monthly remuneration works); (3) make use of tax-free allowances. The full checklist is in our take-home pay action list. If bonus take-home is on your mind, see tax and take-home pay on bonuses as well.

Summary

• Take-home annual pay = amount paid − (social insurance premiums + withholding tax + resident tax). Only resident tax is missing from the withholding slip.
• Check resident tax on the resident tax notice that arrives around June each year. If you don't have it, estimate it as (employment income after deduction − total income deductions + ¥50,000) × 10%.
• A single person earning ¥4,500,000 gross takes home about ¥3,510,000 a year, a take-home rate of about 78%.
• As gross pay rises, the take-home rate falls from 80% toward 75%.
• You can move your take-home pay in three directions: income deductions, how social insurance premiums are set, and tax-free allowances.

Sources

This article is based on the following primary sources.

• National Tax Agency No.1400: Employment income
• National Tax Agency No.2662: How the year-end adjustment works
• Ministry of Internal Affairs and Communications: How individual resident tax works

*This article is general information. Tax and premium amounts depend on individual circumstances (dependents, deductions, municipality, health insurance plan). Check exact figures on your withholding slip, resident tax decision notice and pay statements.