---
title: "Sales Tax & VAT Calculator: Add or Remove | Citrus Carton"
description: "Add sales tax, VAT or GST to a price, or take it out of a tax-inclusive price, at any rate you enter, with a few published standard rates to start from."
url: https://citruscarton.shop/sales-tax-vat-calculator/
---

# Sales tax & VAT calculator

Add tax to a price, or find the price before tax hidden inside a total. Works for sales tax, VAT and GST at whatever rate applies to you.

## Adding and removing tax

Price with tax = price before tax × (1 + rate ÷ 100)
Price before tax = price with tax ÷ (1 + rate ÷ 100)

Example: 120 including 20% VAT is 120 ÷ 1.2 = 100 before VAT, so the VAT is 20. Taking 20% off 120 instead gives 96, which is wrong: the 20% was charged on 100, not on 120. At any rate, tax makes up rate ÷ (100 + rate) of a tax-inclusive price: one sixth at 20%.

### Which rate?

Enter the rate that applies to your purchase. US sales tax often combines state, county and city rates, so add them together. The buttons fill in a few published standard rates as examples; reduced rates apply to some goods, and rates change, so check the current one with the tax authority.

## Sources

- GOV.UK, [VAT rates](https://www.gov.uk/vat-rates): UK standard rate 20%.
- Revenue (Ireland), [Current VAT rates](https://www.revenue.ie/en/vat/vat-rates/search-vat-rates/current-vat-rates.aspx): standard rate 23%.
- Australian Taxation Office, [Goods and services tax (GST)](https://www.ato.gov.au/businesses-and-organisations/preparing-lodging-and-paying/business-activity-statements-bas/goods-and-services-tax-gst): GST of 10% on most goods and services.
- Canada Revenue Agency, [GST/HST calculator and rates](https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/gst-hst-businesses/charge-collect-which-rate/calculator.html): GST 5%, HST 13% in Ontario.
- European Commission, [VAT rates](https://taxation-customs.ec.europa.eu/taxation/vat/vat-directive/vat-rates_en): EU standard rates must be at least 15%; each country's rates are in the Commission's Taxes in Europe Database.

## Questions

**Why isn't removing 20% VAT the same as 20% off?**

Because the VAT was 20% of the price before tax. Divide by 1.2 to remove it; multiplying by 0.8 takes off too much.

**Can I use this for GST or HST?**

Yes. GST, HST and VAT are all charged as a percentage of the price, so the same formulas apply; just enter the right rate.

**Why might a receipt differ by a cent?**

Tax may be rounded on each item or on the whole bill, and the rules differ between countries and shops.