Sales Tax Calculator
Compute sales tax forward and backward. Calculate tax on a pre-tax price or extract the pre-tax price from a tax-inclusive total.
Inputs
Calculation
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Run calculation
Pre-tax amount—
Tax amount—
Total with tax—
Pre-tax vs. tax-inclusive math
Most invoices show pre-tax pricing with sales tax added. But customer-facing prices in many regions (especially Europe) are tax-inclusive. Knowing how to extract the pre-tax amount from a tax-inclusive total is essential for revenue reporting, margin math, and cross-border pricing.
Frequently Asked Questions
What rate should I use?
Quebec QST+GST: 14.975%. Ontario HST: 13%. US state-level rates vary 0-9.5%. Use your jurisdiction\u2019s actual rate for compliance.
Need pricing strategy that handles multi-region tax cleanly?
Riman Agency builds international DTC and SaaS pricing.