Sales Tax
Add sales tax to a purchase and see the pre-tax and after-tax totals.
About Sales Tax
Sales tax is added to the pre-tax price to produce the amount you actually pay at the register. Taxes vary by region and can shift the true cost of an item, so computing them up front avoids surprises at checkout.
Formula
Sales Tax
After-tax price = pre-tax price + pre-tax price x tax rate
- tax rate
- Sales tax as a percentage of the price
Worked example
With the default values below, Sales Tax returns After-Tax Price of $129.90. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Pre-tax price
- 120
- Sales tax rateaccepts 0–30 %
- 8.25 %
Results
- After-Tax Price
- $129.90
- Tax Amount
- $9.90
- Tax Share
- 7.62%
Step by step
- 1Values used
- 2Sales Tax
- 3After-Tax Price= 129.90
- 4Tax Amount= 9.90
- 5Tax Share= 7.62
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Sales Tax calculated?
After-tax price = pre-tax price + pre-tax price x tax rate Sales tax is added to the pre-tax price to produce the amount you actually pay at the register.
Why does Sales Tax matter?
Taxes vary by region and can shift the true cost of an item, so computing them up front avoids surprises at checkout.
What values do I need to enter?
This calculator takes 2 inputs: Pre-tax price, Sales tax rate. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.