# Reverse Tax Calculator

> Free, fast, client-side web application for calculating sales tax, VAT, GST, HST, and payroll tax backwards from gross totals.

Reverse Tax Calculator provides instant mathematical tools and verified regional tax breakdowns to extract pre-tax net subtotals, tax paid, and tax rates backwards from inclusive totals.

## Core Calculators

- [Reverse Sales Tax Calculator](https://www.reversetaxcalculator.pro/reverse-sales-tax-calculator): Back-calculate sales tax and net price from inclusive total.
- [Reverse VAT Calculator](https://www.reversetaxcalculator.pro/reverse-vat-calculator): Calculate pre-VAT subtotal and VAT paid for UK, EU, and global business invoices.
- [Reverse GST Calculator](https://www.reversetaxcalculator.pro/reverse-gst-calculator): Calculate pre-GST net amount and GST tax paid.
- [Reverse HST Calculator](https://www.reversetaxcalculator.pro/reverse-hst-calculator): Back-calculate Canadian Harmonized Sales Tax for Ontario, Atlantic Canada, and provinces.
- [Reverse Tax Rate Solver](https://www.reversetaxcalculator.pro/reverse-tax-rate-calculator): Solve for exact tax rate percentage when only net and gross prices are known.
- [Net to Gross Paycheck Estimator](https://www.reversetaxcalculator.pro/reverse-income-tax-calculator): Estimate required gross salary based on desired take-home pay.
- [Reverse Tax and Tip Calculator](https://www.reversetaxcalculator.pro/reverse-sales-tax-and-tip-calculator): Separate subtotal, sales tax, and restaurant gratuity from total receipt.

## Guides & Documentation

- [Reverse Tax Formula & Math Guide](https://www.reversetaxcalculator.pro/reverse-tax-formula): Mathematical proofs, division shortcuts, and step-by-step reverse tax equations.
- [How to Calculate Reverse Tax Percentage](https://www.reversetaxcalculator.pro/guides/how-to-calculate-reverse-tax-percentage): 2,000+ word guide covering basic division factors to multi-tier tax rates.
- [Reverse Tax vs Forward Tax Comparison](https://www.reversetaxcalculator.pro/guides/reverse-tax-calculator-vs-forward-tax-calculator): Detailed comparison of forward POS pricing versus reverse accounting math.
- [Net to Gross Salary Guide](https://www.reversetaxcalculator.pro/guides/net-to-gross-salary-explained): Comprehensive payroll guide covering FICA deductions, effective tax rates, and paycheck math.
- [Canada Sales Tax Guide (GST vs HST vs PST)](https://www.reversetaxcalculator.pro/guides/gst-vs-hst-vs-pst-canada-explained): Provincial tax rate matrix, CRA Input Tax Credit (ITC) rules, and place of supply.

## Regional Tax Calculators

- [California Reverse Sales Tax](https://www.reversetaxcalculator.pro/california-reverse-sales-tax-calculator): Reverse sales tax calculations for California (7.25% base rate).
- [Texas Reverse Sales Tax](https://www.reversetaxcalculator.pro/texas-reverse-sales-tax-calculator): Reverse sales tax calculations for Texas (6.25% base rate).
- [New York Reverse Sales Tax](https://www.reversetaxcalculator.pro/new-york-reverse-sales-tax-calculator): Reverse sales tax calculations for New York (4.00% state + local rate).
- [Ontario Reverse HST](https://www.reversetaxcalculator.pro/ontario-reverse-sales-tax-calculator): Reverse HST calculations for Ontario (13% blended rate).
- [Quebec Reverse Sales Tax](https://www.reversetaxcalculator.pro/quebec-reverse-sales-tax-calculator): Reverse additive GST + QST (14.975% combined rate).

## Optional

- [Full Content Version](https://www.reversetaxcalculator.pro/llms-full.txt): Complete text, formulas, regional rates, and documentation for AI agent consumption.