🧾 Sales Tax & VAT Calculator
Add sales tax to a price, or find the tax amount and pre-tax price from a tax-inclusive total. Works for US sales tax and EU/UK VAT.
Last Updated: July 10, 2026
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Your Tax Breakdown
📊 Common Tax Rate Reference Table ($250 item)
| Tax Rate | Tax Added (excl.) | Total (excl.) | Tax Included (incl.) |
|---|---|---|---|
| 5% | $12.50 | $262.50 | $11.90 |
| 7.25% | $18.13 | $268.13 | $16.90 |
| 8% | $20.00 | $270.00 | $18.52 |
| 8.875% | $22.19 | $272.19 | $20.39 |
| 10% | $25.00 | $275.00 | $22.73 |
| 20% (UK VAT) | $50.00 | $300.00 | $41.67 |
💡 Sales Tax vs VAT
US sales tax is added once, at the final retail sale, on top of the listed shelf price. EU/UK VAT is collected at each stage of production but the retail price shown to consumers already includes it — so for a VAT-country price you usually need to "back out" the tax rather than add it.
🧮 How to Calculate Sales Tax & VAT
Adding Tax to a Price (Tax-Exclusive / US Sales Tax Style)
Tax Amount = Price × (Tax Rate / 100)
Total = Price + Tax Amount
Example: $250 at 8% → $250 × 0.08 = $20 tax → $270 total.
Extracting Tax from a Tax-Inclusive Price (VAT Style)
Tax Amount = Price − (Price / (1 + Tax Rate/100))
Pre-Tax Price = Price / (1 + Tax Rate/100)
Example: $250 tax-inclusive at 8% → $250 / 1.08 = $231.48 pre-tax → $18.52 tax.
💡 Real-World Examples & Use Cases
Three verified examples using both calculation modes.
$250 item, 8% sales tax (tax added)
A US retail purchase where tax is added at checkout.
Result: Tax = $20.00 → total $270.00.
$250 tax-inclusive price, 8% VAT (tax included)
The same $250 shown as a VAT-inclusive retail price.
Result: Tax portion = $18.52, pre-tax price = $231.48.
$1,200 laptop, 20% UK VAT (tax included)
A UK retail price that must already include 20% standard VAT.
Result: VAT portion = $200.00, pre-tax price = $1,000.00.
🔍 People Also Ask
Is sales tax the same in every US state?
No — combined state, county, and city sales tax rates vary from 0% to over 10% depending on location.
What is the standard UK VAT rate?
20% is the standard UK VAT rate, though some goods qualify for a reduced 5% rate or 0% zero-rating.
Do I add or remove tax for a receipt total?
If the total already includes tax (common for VAT countries), use "tax is included" mode. If tax is charged separately at checkout (typical for US sales tax), use "add tax" mode.
⚠️ Common Mistakes & Pro Tips
- Using the wrong mode: Adding 8% to a price that already includes 8% tax overstates the tax — always check whether the price is tax-inclusive first.
- Assuming one national sales tax rate: In the US, sales tax is a combination of state + local rates and varies by ZIP code — there's no single national rate.
- Forgetting exemptions: Groceries, medicine, and some services are often exempt or taxed at a reduced rate — check local rules before assuming the full rate applies.
- Mixing up VAT and sales tax math: VAT-inclusive prices require dividing by (1 + rate), not multiplying by the rate, to find the tax portion.
- Rounding too early: Round only the final displayed total — rounding intermediate tax amounts on multi-item orders can cause small discrepancies.