VAT Calculator

This VAT calculator adds VAT to a net price, removes VAT from a gross price, and shows the VAT amount separately. It is useful for invoices, quotes, receipts, ecommerce pricing, and business cost checks.

VAT is charged as a percentage of the net price. If you already have a VAT-inclusive price, removing VAT is not the same as subtracting the VAT percentage from the total.

If a net price is GBP 100 and VAT is 20%, the VAT amount is GBP 20 and the gross price is GBP 120.

If the gross price is GBP 120 and VAT is 20%, the net price is GBP 100 because you divide by 1.20 rather than subtracting 20% from GBP 120.

Use the calculator to check whether a price is VAT-inclusive or VAT-exclusive before issuing quotes or comparing suppliers.

VAT rates and rules vary by country and product type, so confirm the correct rate and whether the transaction is taxable, exempt, zero-rated, or outside scope.

Before sending an invoice or publishing a price, confirm whether the customer expects to see the net price, VAT amount, and gross total separately. This is especially important for B2B quotes and ecommerce checkout pages.

If you are comparing supplier prices, make sure both prices are treated the same way. A VAT-inclusive price can look higher than a VAT-exclusive price even when the underlying net cost is similar.

Use this VAT calculator for three arithmetic jobs: add VAT to a net amount, remove VAT from a VAT-inclusive amount, or calculate the VAT amount only.

The rate field is editable, so it can handle standard, reduced, zero, or custom rates when you already know the correct VAT treatment.

Know whether the starting amount is VAT-exclusive or VAT-inclusive before choosing the mode. The reverse calculation divides by 1 + rate, so subtracting 20% from a gross price is not the same thing.

Use it for invoice checks, quote comparisons, retail pricing, and supplier-price comparisons where the VAT treatment is already known.

Keep VAT registration, partial exemption, flat-rate scheme, reverse charge, and reclaim rules outside this tool; those are compliance questions, not simple add/remove maths.

Adding 20% to an already VAT-inclusive price — double counting.

Using standard rate on zero-rated food, books, or exports without checking category.

Confusing VAT with income tax or corporation tax on profit.

Comparing a VAT-inclusive consumer price with a VAT-exclusive business quote without converting one of them.

Using the calculator as a VAT return tool. It does not track input VAT, output VAT, reclaimable VAT, exemptions, or tax periods.

Example: enter £100 in Add VAT mode at 20%. The VAT amount is £20 and the gross price is £120.

Now enter £120 in Remove VAT mode at 20%. The net price is £100 and the VAT amount is £20.

Change only the rate if you are testing standard versus reduced-rate pricing. Change the mode if the starting price switches from net to gross.

For invoice reviews, keep net price, VAT amount, and gross price visible so both buyer and seller can see which amount is being compared.

Use vat add remove for a lighter everyday add/remove VAT flow if you do not need the tax-category page context.

Use sales tax for US-style sales tax arithmetic rather than UK VAT wording.

Use profit margin or markup when the question is business pricing before VAT rather than the VAT amount itself.

Do not route income tax, corporation tax, or VAT-registration threshold searches here unless the calculator actually has those inputs.

Check whether the customer expects prices to be shown including or excluding VAT.

Check whether the product or service is taxable, exempt, zero-rated, reduced-rate, or outside scope before entering the rate.

Check whether reverse charge or partial exemption applies. If it does, a simple VAT amount may not be enough for accounting records.

Rerun this VAT calculator whenever the price, VAT rate, or inclusive/exclusive treatment changes.

Recheck supplier comparisons when one quote is VAT-inclusive and another is VAT-exclusive.

If this estimate differs from accounting software, check whether rounding, tax code, rate, invoice line treatment, or reverse-charge handling is different.