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Tax Calculator
add or remove VAT / sales tax, invoice by rate
Enter an amount and a rate to get the tax and the total instantly. For invoices, lines are grouped by rate and tax is rounded once per rate — required for Japanese qualified invoices and common for VAT invoices.
- Local
- No upload
- No sign-up
- Free
How to use it
- In Quick, enter an amount and a rate, and say whether tax is included.
- See the tax and the total right away.
- For invoices, switch to Invoice lines, add each line, and get tax rounded once per rate; print or export CSV.
FAQ
Why round once per rate?
For Japanese qualified invoices, tax must be totalled per rate and rounded once per rate per invoice, not rounded per line and summed (NTA Q&A). The issuer chooses down, half-up or up.
Can I mix gross and net prices?
No. One invoice uses one basis; switch it with “Prices are”.
Why no country rate presets?
Rates change and local taxes vary. To avoid stale data, only Japan's officially sourced rates are preset; enter other rates from official sources.
Is anything saved?
Nothing leaves this page, and it clears when you close it. Export CSV or print to keep a copy.
Are my files uploaded to a server?
No. The tool runs in your browser; your files and anything you enter are processed on your device only. The site only counts how often tools are opened and finished, never their contents.
Do I need to sign up or pay?
No. Every tool is free, needs no sign-in and has no watermark or usage limit.
Does it work on my phone?
Yes, in a recent Chrome, Safari or Edge. For large files a computer is faster.
Still have a question or found a bug? Let us know.