Key facts at a glance
Resident tax (住民税)
~10%
Income levy: 6% municipal + 4% prefectural
Assessed on
Last year
Billed and paid the following year
Per-capita levy (均等割)
~¥5,000/yr
Flat, regardless of income level
Here's the answer before the mechanism: Japan's resident tax (住民税, juminzei) that you pay THIS calendar year is calculated on the income you earned LAST calendar year, not your current salary. If this is your first full year earning income in Japan, you'll pay close to ¥0 in resident tax, then a real bill lands the following June based on what you actually earned, often catching people off guard because their take-home pay visibly drops on an unchanged salary.
This is a well-known but genuinely confusing feature of Japanese payroll, and it's easy to misread as either a mistake or a permanently low rate. It's neither. It's a timing mechanism, and once you see the mechanism clearly across a few years, budgeting around it becomes straightforward.
See your exact resident tax bill for this year, based on last year's income.
Open the Resident Tax CalculatorThe exact mechanism: how the previous-year assessment works
Every January, employers file a report (給与支払報告書) with each employee's city or ward office (市区町村役場) listing their total employment income for the calendar year just ended. The local tax office uses that figure, together with the employee's registered address as of 1 January, to calculate resident tax liability for the coming fiscal year. Two components make up the bill: the income levy (所得割), a flat 10% of taxable income (roughly 6% municipal, 4% prefectural), and the per-capita levy (均等割), a small flat amount of about ¥5,000/year that applies regardless of income (waived below a low-income threshold that varies by municipality).
That bill then gets collected starting around June, either withheld from salaried employees' payslips in 12 equal monthly installments running through the following May (特別徴収, the standard method for employees), or paid directly by the taxpayer in four quarterly installments if self-employed or between employers (普通徴収). Either way, the amount withheld in any given month from June onward is always based on the calendar year that ended the previous 31 December, never the year currently in progress.
A four-year worked example
Take someone who arrives in Japan and starts earning a partial-year salary of ¥3,000,000 in Year 1, then gets a raise to a steady ¥6,000,000 from Year 2 onward. Here's what their resident tax bill looks like each year, and which year's income it's actually based on.
| Calendar year | Salary earned that year | Resident tax billed that year |
|---|---|---|
| Year 1 (arrival) | ¥3,000,000 (partial year) | ≈ ¥0 (first year, no prior Japan income) |
| Year 2 | ¥6,000,000 (full year, raise) | ≈ ¥105,275 (based on Year 1's ¥3,000,000) |
| Year 3 | ¥6,000,000 (unchanged) | ≈ ¥295,550 (based on Year 2's ¥6,000,000) |
| Year 4 | ¥6,000,000 (unchanged) | ≈ ¥295,550 (based on Year 3's ¥6,000,000, now steady-state) |
Notice the two-step ramp: Year 1's low salary produces a modest Year 2 bill, then Year 2's full salary produces a much larger Year 3 bill, nearly triple, on the exact same ¥6,000,000 income the person has already been earning for two years. From Year 4 onward the bill stabilizes into a steady state, since salary and the prior year it's based on are both flat. That two-year ramp, not the steady-state 10% figure, is what a real first-mover in Japan actually experiences on their payslip.
The trap: a pay cut or job loss doesn't cancel last year's bill
Because resident tax is fixed based on a year that's already over, it doesn't adjust if your circumstances change afterward. Someone who earned ¥10,000,000 last year and takes a lower-paid role, goes freelance, or loses their job this year will still be billed resident tax on that ¥10,000,000, arriving exactly when they can least afford it. This is the single most common resident tax complaint among people who've changed jobs or left Japanese corporate employment.
The practical takeaway: whenever your income is about to drop, whether by choice or otherwise, set aside roughly one more year's worth of resident tax at your OLD, higher salary level before you count on the lower salary's full take-home. The same logic runs in reverse when leaving Japan permanently: your employer will either deduct the full outstanding balance from your final paychecks in one go, or you'll need to appoint a local tax representative to keep paying installments after you've left.
How this differs from national income tax
National income tax runs on the opposite timing: it's withheld from every paycheck as you earn the income, based on your CURRENT year's salary, across 7 progressive brackets from 5% to 45%, plus a 2.1% reconstruction surtax. So at any given moment, your payslip is combining two different taxes calculated on two different years, national tax on this year's income, resident tax on last year's. Neither figure is wrong, they're just never looking at the same calendar year at the same time. Our Japan Resident Tax Calculator puts both side by side so you can see exactly what's driving each line.
See your own resident tax timing gap
Enter last year's and this year's salary separately and see your actual resident tax bill, plus what it would be if it tracked your current income instead.
Open the Japan Resident Tax CalculatorMonthly briefing
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Frequently asked questions
Why is Japan's resident tax based on last year's income instead of this year's?
It's a structural design choice, not an error or delay in processing. Japan's local governments (prefectures and municipalities) calculate resident tax once a year using each resident's final income figure for the calendar year that just ended, then spend the following year billing and collecting it, typically withheld from salaried employees' payslips in 12 monthly installments from June through the following May. National income tax, by contrast, is withheld continuously as you earn it during the current year. The two taxes are never looking at the same calendar year at the same time.
How much resident tax will I actually pay in my first year in Japan?
Close to zero, or exactly zero, if you had no Japan-sourced income the previous calendar year. If you already had partial-year Japan income the year before you started your current role (say you arrived mid-year), you'll owe a small amount based on that partial figure, not your new, higher salary. Either way, your genuine first-year resident tax bill is almost always dramatically lower than the ~10% figure quoted in most salary discussions, which describes the steady-state rate that only applies from your third calendar year onward in a typical arrival scenario.
When does my resident tax finally 'catch up' to my real salary?
Around June of your third calendar year in Japan, in the common case of arriving partway through year one. Your year-one resident tax (paid during year two) is based on a small or zero prior-year figure. Your year-two resident tax (paid during year three) is based on your first full calendar year's income, which is when the bill starts to reflect something closer to your real salary. From year three onward, assuming your salary stays flat, resident tax reaches a steady state where it's always based on the immediately preceding full year.
What's the exact resident tax rate and how is it split?
Two components. The income levy (所得割) is a flat 10% of your taxable income (the same taxable-income base used for national income tax, after the employment income deduction, social insurance deduction, and basic deduction), split roughly 6% municipal and 4% prefectural. On top of that, a small flat per-capita levy (均等割) of about ¥5,000/year applies regardless of income (roughly ¥3,000 municipal plus ¥1,000 prefectural, plus a small national forest environment tax component added since FY2024), though many municipalities waive this for very low earners.
What happens to my resident tax if my salary drops or I lose my job?
Nothing changes about what you already owe. If you earned a high salary last year and this year you're unemployed or earning much less, you'll still be billed this year's resident tax based on last year's higher figure, arguably the worst possible timing, since the bill lands exactly when your income has dropped. This is one of the most-cited financial planning traps for people leaving a job or taking a pay cut in Japan: budget for one more year of resident tax at your OLD salary level even after your income changes.
Do I owe resident tax if I leave Japan before the bill catches up?
Yes, resident tax liability is fixed based on the calendar year you were resident, regardless of where you live when the bill is issued. If you leave Japan permanently before that liability is paid off, your employer typically either deducts the full remaining balance from your final paychecks in one lump sum (一括徴収) or you're required to appoint a tax representative (納税管理人) in Japan to handle ongoing installment payments on your behalf. Confirm which applies with your employer's payroll or HR team before you leave.