Make reverse tax math accessible to everyone
Reverse Sales Tax Calculator helps shoppers, freelancers, and small businesses split tax from any total in seconds. We cover US sales tax, Canadian GST/HST/PST, European VAT, India GST, and global consumption taxes — each with localized calculators, examples, and links to official agencies.
Receipts rarely show the price before tax
We started after too many expense reports where the only number available was the final charge. Spreadsheets work, but most people need a faster, clearer answer at the point of purchase. Our tools run in the browser, respect your privacy, and pair instant math with educational guides — not signup walls.
How we build and update content
Regional pages begin with official rate publications and agency guidance. Writers draft localized examples; reviewers verify formulas and disclaimers. When states or countries change rates materially, we update pages and refresh “Last updated” labels. Details live in our editorial guidelines.
Math you can verify
Reverse calculation uses original = total ÷ (1 + rate). Calculators apply your inputs exactly — no hidden adjustments. Published rates are starting points; your receipt, invoice, or compliance software is authoritative for filings.
Trust through transparency
- Cite official government and standards sources where rates are discussed
- Attribute articles to named authors and reviewers
- Label educational content — we do not provide personalized tax advice
- Correct errors quickly when readers report them
Meet our editorial team · References & resources · Verification Standards
Your numbers stay on your device
Calculator inputs are processed locally in your browser. We do not store receipt amounts or sell calculation data. Read our full privacy policy for cookies, analytics, and contact handling.
What we will never do
We will not promise specific refunds, audit outcomes, or filing results. We will not present estimates as legal advice. We will not hide who wrote or reviewed our content. If we are unsure about a rule, we say so and point you to the relevant agency.