Overview
A general-purpose VAT and sales-tax calculator that adds tax to a net amount or removes it from a gross amount. It includes quick buttons for common rates used around the world, a custom-rate slider, and an editable currency symbol, so the same arithmetic works for UK VAT, EU VAT, or any other consumption tax.
How It Works
Pick Add tax or Remove tax (back-calculate). Enter the amount — the field label switches between net and gross depending on the mode — and optionally edit the currency symbol (up to three characters). Click a preset rate (5, 7, 8, 10, 12, 18, 20, 23, or 25 percent) or drag the custom slider from 0 to 40 in half-point steps. The results show the tax amount, the net excluding tax, and the gross including tax, all formatted with your chosen symbol.
Step-by-Step Usage Guide
- Choose Add tax for a net amount, or Remove tax for a tax-inclusive price.
- Enter the amount and adjust the currency symbol if you want it displayed.
- Click a preset rate or set a custom one on the slider.
- Read the tax, net, and gross figures in the results.
Technical Specifications & Standards
Forward mode is gross = net × (1 + rate/100). Remove mode uses the divisor form, net = gross / (1 + rate/100) and tax = gross − net, which is the correct back-calculation for a tax-inclusive price. This distinction matters: in a 120 gross at 20% VAT, the tax is 20, not 24 — subtracting 20% of the gross is the classic mistake the mode switch prevents. The preset buttons span rates you will recognise: 20 for UK VAT, 23 for Poland and Ireland, 25 for Denmark and Sweden, 10 for Japan's consumption tax, and 5 and 18 for India's GST slabs. They are conveniences, not a registry of current law — jurisdictions change rates, and the custom slider covers anything else up to 40 percent. The symbol field is cosmetic, so results in any currency read naturally. The tool applies a single uniform rate; it does not handle reduced-rate categories, registration thresholds, or reverse-charge rules, which are legal questions rather than arithmetic.
Targeted Use Cases
- Pricing an invoice by adding your country's VAT to a net fee.
- Extracting the pre-tax value from a store receipt that shows only the total.
- Comparing how a 20% versus 25% jurisdiction changes a price comparison.
- Bookkeeping checks on whether a supplier's tax-inclusive quote was computed correctly.
Notes & Gotchas
- Match the mode to your input before typing, since the same number means net in one mode and gross in the other.
- Verify your jurisdiction's current rate on an official source; presets are shortcuts, not tax law.
- Use the divisor logic mentally when checking receipts — never subtract rate percent of the gross.
- Keep the currency symbol consistent so screenshots and exports read cleanly.
Frequently Asked Questions
How do I remove VAT from a gross price?
Select Remove tax, enter the gross amount, and set the rate. The tool computes net = gross / (1 + rate/100). For 120 at 20% VAT that gives a net of 100 and VAT of 20 — subtracting 20% of 120 instead would wrongly give 96 and 24.
Which rates are on the preset buttons?
5, 7, 8, 10, 12, 18, 20, 23, and 25 percent — a spread of common consumption-tax rates across countries. The slider accepts any custom rate from 0 to 40 in 0.5 steps if your rate is not listed.
Does it support multiple tax rates on one invoice?
No. The calculation applies one uniform rate to the whole amount. If your invoice mixes reduced and standard rates, compute each line separately and add the tax amounts.
Is the currency configurable?
The symbol is — up to three characters, such as $, £, €, or ₹. The decimals and grouping follow your browser's locale. The tool does no exchange-rate conversion; it is single-currency arithmetic.