Discount + Tax Calculator
Find the final price after applying a percentage discount and then adding sales tax or VAT — all in one step. See your savings, the tax amount, and exactly what you’ll pay at checkout.
Original price → discount → tax → final price
Enter the original price, discount percentage, and tax rate. Tax is always applied after the discount — the correct order for retail and sales tax.
Common tax rate presets
How to calculate final price after discount and tax
The key rule: tax is always calculated on the sale price, not the original price. Apply the discount first, then calculate tax on the reduced amount. Doing it in the wrong order gives a higher (incorrect) result.
The formula: Final price = Original × (1 − Discount% ÷ 100) × (1 + Tax% ÷ 100).
Worked example
A $150 jacket is 30% off with 8.5% sales tax:
| Step | Calculation | Result |
|---|---|---|
| Original price | $150.00 | |
| Apply 30% discount | $150 × 0.70 | $105.00 (sale price) |
| You save | $150 − $105 | $45.00 |
| Add 8.5% tax | $105 × 1.085 | $113.93 (final total) |
| Tax amount | $113.93 − $105 | $8.93 |
What if there’s no discount (tax only)?
Enter 0 in the discount field. The calculator will show the tax amount and final price for any original price and tax rate — effectively working as a sales tax calculator. For European VAT rates, use the VAT calculator which includes country presets for the UK, Netherlands, Germany, France, and Switzerland.
What if there’s no tax (discount only)?
Enter 0 in the tax field. The result is identical to our discount calculator. This combined tool is most useful when shopping in US states or countries that apply tax at checkout after store discounts.
Effective discount after tax
If a $200 item is 25% off and you’re in a 9% tax state, your final price is $200 × 0.75 × 1.09 = $163.50. The nominal saving is $50 before tax, but you actually pay $13.50 in tax on the reduced price, so the net saving versus the original taxed price ($218) is $54.50. Tax on a discounted item always costs you less in absolute dollars than tax would have on the full price.
Frequently asked questions
After. Sales tax is applied to the final purchase price, which is the discounted (sale) price. You never pay tax on the full original price when a store discount has been applied. This calculator applies them in the correct order: discount first, tax second.
$100 × 0.80 = $80 sale price. $80 × 1.10 = $88 final total. Tax amount = $8. You saved $20 from the discount.
Receipts apply tax to the discounted price, which is less than the original. If you calculated tax on the original price instead, your estimate will be too high. Another common cause: some items (like groceries) are tax-exempt even if other items in the same basket are taxed.
Yes. Enter any tax rate — whether it’s US sales tax, UK VAT (20%), or any other rate. The calculation is identical: discount applied first, then tax on the reduced price. Use the 20% VAT preset button for quick access.
Yes — completely free, no signup, no ads. All calculations run instantly in your browser.