Sales Tax Calculator
Sales Tax Calculator calculates tax amount; before-tax; after-tax. Enter your assumptions above to get the primary answer first, followed by supporting metrics and detail where useful.
Inputs
Sales Tax CalculatorResults
Adjust the inputs, then use the primary action. The result will appear here.
What this calculator answers
Sales Tax Calculator calculates tax amount; before-tax; after-tax. Enter your assumptions above to get the primary answer first, followed by supporting metrics and detail where useful.
How this calculation works
This tool uses pre-tax price; tax rate; mode add/remove tax. It returns tax amount; before-tax; after-tax. Headline results, charts, schedules, comparisons and exports are generated from the same normalized calculation state.
Worked example
After tax: 108.25 • Before tax: 100 • Tax: 8.25
Assumptions
Unless the tool says otherwise, rates are annual percentages, currency inputs are denominations rather than automatic FX conversions, and projections are mathematical models rather than guarantees. Typed values remain authoritative even outside normal slider ranges.
Limitations
Rules, limits, fees and tax calculations require a current versioned source package. When a source is stale or unavailable, the tool uses a truthful unavailable/manual state instead of pretending old data is current.
Sources & review
Changing-rule tools cite the official source, jurisdiction/effective period and verification date. Evergreen formula pages document their calculation method and review date. Last reviewed: 2026-09-25.
Privacy and review status
Financial inputs stay on this device by default and are not placed into analytics, advertising or error payloads. Review the methodology or report a calculation issue if something looks wrong. Methodology · Report a calculation issue.
Common questions
What does the Sales Tax Calculator calculate?
It calculates tax amount; before-tax; after-tax. The result is based on the inputs and assumptions shown on this page.
What inputs does the Sales Tax Calculator use?
The main inputs are pre-tax price; tax rate; mode add/remove tax. Change them to model a different scenario.