VAT Calculator

How to use

1. Choose whether you are adding tax to a price or taking it out of one.
2. Enter the amount, then the rate — 8% and 10% are one tap away.
3. Read the three figures: before tax, the tax itself, and the total.
4. Use the before-tax figure when you are recording revenue, and the total when you are quoting a customer.

Features

• Both directions, with the tax-inclusive one done correctly.
• Vietnam's 8% and 10% rates preset, alongside 0% and 5%.
• Reads 1 000 000 and 7,5 the way people type them.
• Every figure shown at once — net, tax, gross — so nothing has to be worked out twice.
• Runs entirely in your browser.

Frequently asked questions

Why is removing VAT not just subtracting the rate?

Because the rate was applied to the smaller number. A 1,100,000 total at 10% comes from 1,000,000 — but subtracting 10% of 1,100,000 gives 990,000, which is 10,000 short. The correct figure is the total divided by 1.10. At a 10% rate the two answers differ by roughly 1% of the total: small enough to pass a glance on an invoice, and wrong every single time.

Which rate applies in Vietnam?

The standard rate is 10%, with a reduced 8% applied to many goods and services under recent stimulus policies, 5% for certain essentials, and 0% for exports. Which one applies to a given line is a question for your accountant — this tool does the arithmetic once you know it.

Does it handle other countries' GST or sales tax?

Yes. The arithmetic is the same wherever a percentage is added to a price; only the rate changes. Type any rate up to 100%.

Why does the total sometimes end in an odd fraction?

Because tax rarely divides evenly. The figures are shown to two decimal places, and the rounding rule for an actual invoice is set by your tax authority — usually rounding each line, not the total. Where that matters, round the line first and enter it here.

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