Add sales tax to a price or remove tax from a tax-included total. Canada province presets included.
GST · HST · PST · QST · USA Manual Rate · Canada & USA
Tax & Salary
Sales Tax Details
Enter the pre-tax price — we calculate the tax and total.
Enter your combined local sales tax rate.
Total After Tax
$110.00
$100.00 + $10.00 tax
See a full breakdown and tax context below.
Breakdown
Pre-tax amount vs. sales tax portion
Add Tax Result
Starting from pre-tax amount, adding sales tax
Pre-tax Amount
$100
Sales Tax
$10
Total
$110
Tax share of total
9.09%
FinCalc Smart AI Sales Tax Analysis
AI-assisted insights by FinCalc Smart
Pre-tax
$100
Sales Tax
$10
Total
$110
At 10% rate, 9.09% of your total payment goes to sales tax.
Estimated Tax
$10.00$100.00 pre-tax + $10.00 tax = $110.00 total.
Tax Rate Check
10% — Moderate
10% is a moderate rate — typical for combined GST/PST or some US state rates.
Add vs Remove Tax
Adding tax mode
You entered $100.00 pre-tax. At 10%, the total you pay is $110.00. Flip to Remove Tax mode to reverse-check a tax-included price.
Receipt Context
$10 in tax
On a $100 purchase at 10%, you pay $10 in sales tax. Over 10 similar purchases, that's $100 in tax annually.
Disclaimer: Educational estimate only. Sales tax rules vary by province, state, locality, product type, exemptions, tax holidays, and business-specific rules. Canada preset rates are general combined rates for illustrative purposes. USA rate must be entered manually. Rates may change — always verify with your provincial/state tax authority. This is not tax or legal advice.
When adding tax to a pre-tax amount, multiply the amount by the tax rate and add the result:
Tax = Amount × Rate
Total = Amount + Tax
Example: $100 at 13% → Tax = $13.00 → Total = $113.00
When removing tax from a tax-included total, divide by (1 + rate) to recover the pre-tax base:
Pre-tax = Total ÷ (1 + Rate)
Tax = Total − Pre-tax
Example: $113 total at 13% → Pre-tax = $113 ÷ 1.13 = $100.00 → Tax = $13.00
In Remove Tax mode, the "tax share of total" is always lower than the statutory rate. This is mathematically correct: the statutory rate (e.g., 13%) applies to the pre-tax base, but the tax share is measured against the total. At 13%, tax is 11.50% of the total — not 13%.
This calculator is for educational and illustrative purposes only. Sales tax rules vary by province, state, locality, product type, exemptions, tax holidays, and business-specific rules. Canada preset rates are general combined rates and may not reflect your specific situation. USA rate must be entered manually as US sales tax varies by state, county, city, and district. Rates may change — always verify with your provincial/state tax authority or a qualified professional. This is not tax or legal advice.