Reverse Sales Tax Calculator (Remove Tax From Total)

Know the tax-inclusive total? Remove sales tax to see the pre-tax price and the exact tax amount.

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Formula

Net = Total ÷ (1 + rate) — Tax = Total − Net (rate as a decimal, e.g. 7.5% = 0.075)

Examples

InputResult
$107.50 at 7.5%net $100.00 · tax $7.50
$220 at 10%net $200.00 · tax $20.00
$530 at 6%net $500.00 · tax $30.00

Frequently Asked Questions

When do I need to reverse sales tax?

When a receipt or invoice shows only the final total and you must report the pre-tax amount and the tax it contains — common for expense claims, bookkeeping and tax-inclusive pricing.

Why divide instead of subtracting?

The tax was added on top of the net price, so the total is net × (1 + rate). Dividing undoes that multiplication; subtracting the rate from the total gives a wrong (too low) tax figure.

Does this work for VAT or GST?

Yes — the math is identical for any percentage-based tax included in a price. Just enter your VAT/GST rate.

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Disclaimer: This calculator is for informational and educational purposes only and does not constitute financial, investment, tax or legal advice. Results are estimates — actual returns, rates and terms vary. Consult a qualified financial professional before making financial decisions.