Japan Consumption Tax Calculator

How Japan’s consumption tax is calculated

Japan’s consumption tax (消費税, shōhizei) is added to the price of most goods and services. Since October 2019 the standard rate has been 10%, with a reduced rate of 8% for food and non-alcoholic drinks bought to take away and for subscription newspapers published at least twice a week. Prices shown to consumers must include the tax, so the question people usually need answered runs backwards: what was the price before tax?

For VAT in other countries, adding or extracting tax at any rate with cent rounding, the VAT calculator is the general version of this page.

From a tax-inclusive price to the pre-tax price

Divide by 1.10 at the standard rate, or by 1.08 at the reduced rate. ¥3,300 ÷ 1.10 = ¥3,000, so the tax is ¥300. When the division does not come out in whole yen — ¥1,000 ÷ 1.10 = ¥909.09… — the tax is rounded: ¥1,000 × 10 ÷ 110 = ¥90.90…, which rounds down to ¥90, so the pre-tax price is ¥910.

From a pre-tax price to the tax-inclusive price

Multiply the pre-tax price by the rate to get the tax, round it, and add it back. ¥980 at 8% gives ¥78.40 of tax, which rounds down to ¥78, for a tax-inclusive price of ¥1,058.

Rounding fractions of a yen

The rules leave the rounding method to the business: rounding down (切り捨て), rounding to the nearest yen (四捨五入) or rounding up (切り上げ). Rounding down is by far the most common and is the default here. The calculator rounds the tax and then derives the other price from it, so the pre-tax price and the tax always add up exactly to the tax-inclusive price. Receipts can still differ by a yen, because a shop may round per item rather than per receipt.

Which rate applies?

• 8% (reduced): food and non-alcoholic drinks bought to take away or delivered; subscription newspapers published at least twice a week.
• 10% (standard): almost everything else, including eating in at restaurants, alcohol, and restaurant-style catering.

The line is drawn by where you eat, not what you eat. A ¥500 bento at a convenience store is ¥540 to take away and ¥550 if you eat it in the store’s seating area, which is why many tills ask. Bottled water is food at 8%; alcoholic drinks are 10%.

This is a summary for everyday price calculations, not tax advice. For invoices, bookkeeping and filing, follow the National Tax Agency’s guidance or ask a tax professional. Both rates include local consumption tax (2.2 points of the 10%, 1.76 of the 8%); JETRO, the government’s trade agency, sets out the rates and the reduced-rate rules in English in its overview of consumption tax, current as checked in September 2026 — the standard rate has been 10% since October 2019 and the reduced rate has stayed at 8% since the same date, with no change announced for 2026.

Worked examples

• ¥3,300 tax-inclusive, standard rate. ¥3,300 ÷ 1.10 = ¥3,000 exactly, so the tax is ¥300 with nothing to round.
• ¥1,000 tax-inclusive, standard rate. The unrounded tax is ¥1,000 × 10 ÷ 110 = ¥90.909…, which rounds down to ¥90. The pre-tax price is ¥1,000 − ¥90 = ¥910, so ¥910 + ¥90 always adds back to ¥1,000.
• ¥980 pre-tax, reduced rate. Tax is ¥980 × 8% = ¥78.40, which rounds down to ¥78, giving a tax-inclusive price of ¥1,058.
• Same ¥980, rounding to nearest instead of down. ¥78.40 rounds to nearest yen as ¥78 too, since 0.40 is below the halfway point — round-to-nearest only changes the answer when the fraction is 0.5 or more.

Edge cases and blocked input

• Negative amounts are rejected — a price cannot be negative, so the field shows an error instead of a result.
• More than two decimal places in the amount, such as ¥100.005, are rejected. Yen has no smaller unit in ordinary pricing, so the calculator accepts at most sen-level precision (two decimals) on the way in.
• A custom rate outside 0–100%, or one with more than two decimal places, is refused.
• A zero-yen amount is accepted and simply returns zero pre-tax, zero tax and zero total.
• Very large amounts — the engine works in whole sen (hundredths of a yen) as integers to avoid floating-point drift, which keeps results exact well beyond any realistic retail price.

Common mistakes

• Multiplying a tax-inclusive price by the rate directly. ¥1,100 × 10% is ¥110, not the ¥100 tax actually included in that price — dividing by 1.10 first, not multiplying, is how you go backwards from an inclusive price.
• Applying 10% to a takeaway food item. Food and non-alcoholic drinks bought to take away are taxed at 8%; the same item eaten in a restaurant's seating area is 10%.
• Expecting the calculator's total to match a receipt to the yen. A shop may round per item instead of per receipt, or use a different rounding rule, so a one-yen gap is normal and not a calculation error.
• Assuming alcohol counts as food for the reduced rate. It does not — alcoholic drinks are taxed at 10% even when bought to take away.

Limitations

This calculator handles the two published rates (10% standard, 8% reduced) plus any custom rate from 0% to 100%, and the three rounding methods businesses use for fractions of a yen. It does not determine which rate applies to a specific product — that judgement (eating in versus takeaway, food versus alcohol) is described above but must be applied by the user. It is not a substitute for the National Tax Agency's own guidance for invoicing or filing. All calculation happens in your browser; no amount you enter is sent to a server.

Frequently asked questions