Sales Tax Calculator

Sales Tax Calculator delivers exactly what its name promises, calculate inclusive or exclusive sales tax with quick rate presets, fast and free. Because it belongs to ToolsMonk's business tools collection, the whole workflow happens on a single page instead of being spread across separate apps or websites.

Typical jobs it handles include adding sales tax to a price for invoicing or quoting, working out the pre-tax base inside a tax-inclusive total, and checking the tax portion of a receipt. The same page works on desktop, tablet, and mobile, so it is equally quick for a single urgent task and for work you repeat every week.

Everything about Sales Tax Calculator is tuned for speed to first result, with privacy-friendly processing and the rest of ToolsMonk's tools nearby when the next task comes up.

Sales Tax Calculator adds tax to a price or extracts it from a tax-inclusive total, showing the base amount, the tax, and the total separately, for invoicing, quoting, and checking receipts.

Adding tax is straightforward, but reversing it is where people slip up. Because the tax was applied to the smaller base rather than the inclusive total, you can't simply subtract the percentage from the total, that removes too much. The correct method is dividing by (1 + rate), which the 'remove tax' mode does for you.

Rates vary by jurisdiction and sometimes by product, so entering the correct local rate is essential for an accurate figure, whether you're dealing with US sales tax, VAT, or GST. Keeping the tax shown separately also keeps invoices and records clean.

Everything runs in your browser, so your figures stay private. Pair it with the GST and other ToolsMonk finance calculators for the rest of your pricing and tax maths.