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Add sales tax to a net price — or strip it back out of a tax-inclusive total.
Add sales tax to a net price — or strip it back out of a tax-inclusive total.
Enter values above and click Calculate — results will appear here with the formula explained.
Sales tax is charged on top of a sticker price in most U.S. states, so the register total equals the net price times one-plus the rate. Going the other direction — extracting the tax from a receipt total — requires dividing instead of subtracting, a step people frequently get wrong. Subtracting 8.25% from a $129.90 total gives $119.18 (wrong); dividing $129.90 ÷ 1.0825 gives $120.00 (correct).
Rates vary not just by state but by county and city, and different product categories can carry different rates. A single address can sit in overlapping jurisdictions: state + county + city + district taxes stack. Always use the specific combined rate for your purchase and location — vendor lookup tools (state DOR sites, TaxCloud, Avalara) report the exact rate by address, while the 'state rate' headline understates what the register actually charges.
Tax-inclusive versus exclusive pricing explains international confusion: EU/UK VAT prices include tax (gross-mode here), US sales-tax prices exclude it (net-mode). A €120 VAT-inclusive item at 20% VAT has a net of €100 (€20 VAT), while a $120 US item at 8% sales tax totals $129.60. Mode selection here mirrors which system you're decoding.
Exemptions and special cases matter: groceries, clothing thresholds, nonprofits, resellers and marketplace facilitator laws each create carve-outs where tax shouldn't apply. Sellers collecting under economic-nexus rules (post-Wayfair) charge based on buyer location for remote sales. When in doubt, the taxability answer lives in the state's product-specific guidance, not in a universal rate table.
Receipt verification is the audit skill this calculator teaches: gross-mode extraction proves whether a receipt's tax line matches the advertised rate, exposing rounding quirks (tax rounds per-line versus on subtotal) and misapplied jurisdictions. For business expensing, the net price is the deductible basis in most cases — the tax line belongs on its own ledger entry.
For large purchases, timing and sourcing shift liability: buying for pickup in a lower-rate jurisdiction versus delivery to a higher-rate address can change the applicable rate legally where seller nexus and sourcing rules allow — but use-tax obligations mean 'no tax charged' rarely equals 'no tax owed'. When stakes exceed casual shopping, confirm with the state's DOR or a tax professional.
Add sales tax to a net price — or strip it back out of a tax-inclusive total. Formula: Add: total = net × (1 + rate/100). Remove: net = gross ÷ (1 + rate/100). Example: A $120 order taxed at 8.25% totals $129.90 with $9.90 of tax.
Sales tax is charged on top of a sticker price in most U.S. states, so the register total equals the net price times one-plus the rate. Going the other direction — extracting the tax from a receipt total — requires dividing instead of subtracting, a step people frequently get wrong. Subtracting 8.25% from a $129.90 total gives $119.18 (wrong); dividing $129.90 ÷ 1.0825 gives $120.00 (correct).
Rates vary not just by state but by county and city, and different product categories can carry different rates. A single address can sit in overlapping jurisdictions: state + county + city + district taxes stack. Always use the specific combined rate for your purchase and location — vendor lookup tools (state DOR sites, TaxCloud, Avalara) report the exact rate by address, while the 'state rate' headline understates what the register actually charges.
Tax-inclusive versus exclusive pricing explains international confusion: EU/UK VAT prices include tax (gross-mode here), US sales-tax prices exclude it (net-mode). A €120 VAT-inclusive item at 20% VAT has a net of €100 (€20 VAT), while a $120 US item at 8% sales tax totals $129.60. Mode selection here mirrors which system you're decoding.
Exemptions and special cases matter: groceries, clothing thresholds, nonprofits, resellers and marketplace facilitator laws each create carve-outs where tax shouldn't apply. Sellers collecting under economic-nexus rules (post-Wayfair) charge based on buyer location for remote sales. When in doubt, the taxability answer lives in the state's product-specific guidance, not in a universal rate table.
Receipt verification is the audit skill this calculator teaches: gross-mode extraction proves whether a receipt's tax line matches the advertised rate, exposing rounding quirks (tax rounds per-line versus on subtotal) and misapplied jurisdictions. For business expensing, the net price is the deductible basis in most cases — the tax line belongs on its own ledger entry.
For large purchases, timing and sourcing shift liability: buying for pickup in a lower-rate jurisdiction versus delivery to a higher-rate address can change the applicable rate legally where seller nexus and sourcing rules allow — but use-tax obligations mean 'no tax charged' rarely equals 'no tax owed'. When stakes exceed casual shopping, confirm with the state's DOR or a tax professional.
A $120 order taxed at 8.25% totals $129.90 with $9.90 of tax. Conversely, a receipt showing $129.90 breaks down to $120 net plus $9.90 tax when reversed at the same rate. A VAT case: €120 gross at 20% VAT → net €100 (€20 VAT) — showing why mode selection matters across tax systems.
Formulas are standard public references (see our methodology). External standards are cited in the text where they apply.
Last reviewed: September 2026 · Report an error