Enter the amount and rate
How to use the tax calculator
"What's the tax-included price of ¥1,000 net?" "What's the net price behind a receipt total?" It is easy to get the direction wrong. This tool works both ways — net to tax-inclusive and back — and also shows the tax amount.
How to use it
Pick the direction, then enter the amount and rate. Choose 10% (standard), 8% (reduced) or a custom rate. If the rate ever changes, just type it into "Custom" and keep using the tool.
About the reduced rate
In Japan, food and drink (excluding alcohol and dining out) and subscription newspapers use the reduced 8% rate. The same shopping trip can mix rates by item, so check the receipt. Since the scope can change, confirm details with official sources such as the National Tax Agency.
Frequently asked questions
How is tax-inclusive / tax-exclusive calculated?+
Switching direction covers both adding and removing tax.
When is the reduced 8% rate used?+
Scope can change, so check official sources.
What are tax-included and tax-added prices?+
This tool handles both via the direction switch.
How is rounding handled?+
In practice, businesses may round down or up differently.
Are my inputs stored?+
・Tax-inclusive = net × (1 + rate) / net = tax-inclusive / (1 + rate)
・Tax = net × rate
・Displayed values are rounded to the nearest unit (business rounding varies)
・Rates and reduced-rate scope follow official information such as Japan's National Tax Agency. The rate is user-adjustable.
This site does not represent the National Tax Agency or any other body and does not guarantee the accuracy of the results or their tax correctness. Rounding and applicable rates vary by transaction and business. For exact tax and filing, consult a tax professional or official information.