Gombo Tools

Gombo Tools

VAT Calculator

Use this free VAT calculator to calculate tax-exclusive amounts, VAT amounts, and tax-inclusive totals. Enter an amount, choose whether it includes VAT, and apply the VAT rate you need. It is useful for invoices, quotes, pricing, and quick tax checks.

Result overview

Amount excluding VAT

100,000

VAT amount

18,000

Total including VAT

118,000

How to calculate VAT

VAT can be calculated in two common ways: from an amount excluding VAT, or by extracting VAT from an amount that already includes VAT.

From amount excluding VAT

Amount excluding VAT
+
VAT amount
=
Total including VAT

VAT amount = Amount excluding VAT × VAT rate

Total including VAT = Amount excluding VAT + VAT amount

Use this method when your price is tax-exclusive and you want to add VAT on top.

From amount including VAT

Amount including VAT
÷
1 + VAT rate
=
Amount excluding VAT

Amount excluding VAT = Amount including VAT ÷ (1 + VAT rate)

VAT amount = Amount including VAT − Amount excluding VAT

Use this method when your price already includes VAT and you need to extract the tax amount.

Use the VAT rate as a decimal in formulas. Example: 18% = 0.18.

How to use this calculator

  • Enter your amount
  • Enter the VAT rate
  • Choose whether your amount excludes or includes VAT
  • Read the amount excluding VAT, VAT amount, and total

VAT calculation examples

Example 1: amount excluding VAT

Amount excluding VAT
100,000
VAT rate
18%
VAT amount
18,000
Total including VAT
118,000

Example 2: amount including VAT

Amount including VAT
118,000
VAT rate
18%
Amount excluding VAT
100,000
VAT amount
18,000

VAT calculation tips

Confirm the VAT rate that applies in your country or market.
Check whether your price is tax-exclusive or tax-inclusive before calculating.
Use consistent rounding rules for invoices and accounting.
Keep invoices, quotes, and tax records organized to avoid mistakes.

Need to create invoices with VAT automatically?

Gombo helps you create invoices, manage customers, track payments, and monitor business operations from one connected platform.

Start with Gombo

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