Convert prices between net and gross with consumption tax

The job

Japanese prices are quoted both ways — a supplier quotes net and your invoice must show gross, or a shelf price is tax-inclusive and you need the net for accounting. Doing ¥1,234,567 × 1.1 in your head is where mistakes live.

Worked example

Net ¥1,000 at 10%: tax ¥100, gross ¥1,100. Going the other way with a gross of ¥1,080 at 8%: the tool removes the tax and shows net ¥1,000 and tax ¥80.

Pick the direction, enter the amount, and tap 10% or 8% for Japan's standard and reduced (food) rates — or type any rate like 5 or 20 for other taxes and countries.

• The tax portion rounds down, matching the common Japanese invoice convention. Individual sellers can round differently.
• Amounts up to 1,000,000,000 and rates 0–1000%. Only the rate matters, so it works for any currency.

Good to know

Since October 2019 Japan has run a two-rate system: 10% standard and 8% reduced for most food and non-alcoholic drinks. When a receipt mixes rates, split the items and run each group at its own rate.