Toolsified

Pricing and invoices

VAT / Sales Tax Calculator

Move quickly between pre-tax and post-tax prices with preset VAT or sales-tax rates, or use your own custom percentage.

Exclusive to inclusive Inclusive to exclusive Preset or custom rates

Calculator

Model a tax-inclusive or tax-exclusive price

Pick a preset if it helps, choose whether your input is before or after tax, and the calculator will show the full breakdown.

Method

How it works

The calculator applies a straightforward percentage formula.

  • gross = net x (1 + rate / 100) when the input is before tax
  • net = gross / (1 + rate / 100) when the input is after tax
  • tax amount = gross - net

Limitations: this is a planning calculator, not legal or accounting advice. Exemptions, mixed rates, import rules, reverse charge, and filing requirements are out of scope.

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Is the preset list official tax guidance?

No. Presets are convenience shortcuts and should be verified against the actual rules that apply to your product, service, and jurisdiction.

Can I use this for US sales tax?

Yes, as a rough percentage calculator. It does not handle local filing rules, exemptions, or nexus.

What if I only know the tax-inclusive price?

Select "Price after tax" and the tool will back out the net amount and tax portion.

How does reverse VAT calculation work?

Divide the gross price by (1 + rate/100) to get the net amount, then subtract net from gross to find the tax portion.

Does VAT apply to cross-border purchases within the EU?

Rules vary by transaction type and threshold; B2C sales often use the destination country rate, while B2B may use reverse charge -- consult official guidance for your situation.

Why do VAT amounts sometimes differ by a penny due to rounding?

Tax authorities typically require rounding per line item, so small rounding differences can appear when you compare line-level and total-level calculations.