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Tax Rate Sources

Regional calculators use reference rates with visible source links and last-checked dates. Always confirm the official rule for your exact transaction.

Sources used by calculators

California Reverse Sales Tax Calculator

Rate shown: 7.25%. Last checked: 2026-05-14.

  • Statewide base sales and use tax: 7.25%

Source: California Department of Tax and Fee Administration

California’s 7.25% figure is the statewide base sales and use tax rate published by CDTFA. Many addresses have higher combined rates because city, county, or district taxes may also apply—confirm the exact location with CDTFA’s rate lookup before relying on this starting rate.

Texas Reverse Sales Tax Calculator

Rate shown: 6.25%. Last checked: 2026-05-14.

  • Texas state sales and use tax: 6.25%

Source: Texas Comptroller sales and use tax

Texas local tax authorities can add up to 2%, for a maximum combined rate of 8.25%.

Quebec Reverse Tax Calculator

Rate shown: 14.975%. Last checked: 2026-05-15.

  • Federal GST: 5%
  • Quebec QST: 9.975%QST is calculated on the selling price excluding GST.

Source: Revenu Québec — basic GST/HST and QST rules

Common taxable goods and services in Quebec use 5% GST plus 9.975% QST. Some goods and services can be exempt or zero-rated.

Ontario HST Reverse Calculator

Rate shown: 13%. Last checked: 2026-05-15.

  • Federal part: 5%
  • Ontario provincial part: 8%

Source: Ontario Harmonized Sales Tax (HST) overview

Ontario HST is 13%, consisting of a 5% federal part and an 8% provincial part.

UK Reverse VAT Calculator

Rate shown: 20%. Last checked: 2026-05-14.

  • Standard VAT rate: 20%

Source: GOV.UK VAT rates

The UK also has reduced and zero-rated VAT categories. Use the rate that applies to the item or service.

Other useful sources

These sources are useful for cross-checking rates or finding official agencies. They are not a substitute for the official rule that applies to a specific transaction.