How to use this calculator
- Enter the Amount you have.
- Type the Tax rate that applies, such as 8.25 for a state rate or 19 for a VAT rate.
- In The amount, choose whether it excludes tax (add tax) or includes tax (remove tax).
- Read the headline price, then the Tax amount, Net amount and Gross amount.
Adding tax versus removing tax
Adding tax is a straight multiplication: net price times one plus the rate. Removing tax is the part that trips people up. You cannot subtract the percentage from the total, because the tax was calculated on the smaller net price, not on the total. You divide by one plus the rate instead.
Gross = Net × (1 + r) and Net = Gross ÷ (1 + r)- Net = price before tax
- Gross = price including tax
- r = tax rate as a decimal (8.25% = 0.0825)
- Tax = Gross − Net
Example 1: adding sales tax to $249
A $249 purchase in an area with an 8.25% sales tax rate comes to $269.54: the tax is $20.54. In the United States, sales tax is added at the register on top of the shelf price, which is why the total always exceeds the tag.
Example 2: removing 19% VAT from $119
In much of Europe, shelf prices already contain VAT. A price of 119 with 19% VAT includes 19 of tax and a net price of 100. Subtracting 19% of 119 would give 96.39, which is wrong. If you instead treat 119 as a net price and add 19%, the total is $141.61 with $22.61 tax, so always set the dropdown to match what the number on your receipt means.
How to use the result
Shoppers can use the net figure to compare prices between regions with and without tax-inclusive pricing. Freelancers and shop owners can use the tax amount to know how much of a payment is not theirs: it belongs in a separate account until it is paid to the tax authority.
If the price is part of a promotion, work out the discounted price first with the discount calculator, which can also add tax. When pricing your own products, see how the tax-free price affects profit in the profit margin calculator.
Common mistakes
The two biggest are subtracting the rate from a tax-inclusive total, and using a state rate while ignoring local or city add-ons that raise the combined rate. Another is assuming everything is taxed: groceries, medicine or digital goods may be exempt or taxed at a reduced rate depending on the place.
Rounding can also cause a cent of difference between your calculation and the receipt, since stores may round per item or per invoice.
Assumptions and limits
The calculator applies one flat rate to the whole amount. It does not look up rates for your location, handle mixed-rate baskets, tax-exempt items, or business rules such as reverse charge and input VAT recovery. Rates change, so confirm the current rate with your tax authority. For business filings, ask an accountant.
Frequently asked questions
How do I calculate sales tax?
Multiply the pre-tax price by the tax rate as a decimal. At 8.25%, $249 × 0.0825 = $20.54 of tax.
How do I remove VAT from a price?
Divide the VAT-inclusive price by 1 plus the VAT rate. With 19% VAT, 119 ÷ 1.19 = 100.
What is the difference between sales tax and VAT?
Sales tax is charged once at the final sale to the consumer. VAT is charged at every stage of production and distribution, with businesses reclaiming the VAT they paid, so the consumer ends up bearing it.
Is the displayed price tax-inclusive?
In the United States and Canada prices usually exclude sales tax. In the EU, UK and many other countries, consumer prices include VAT by law.
Does a sales tax apply to the discounted price?
Usually yes, tax applies to what you actually pay, though coupon rules vary by jurisdiction.