Discount Calculator
Find the sale price after a percentage off, plus tax and total savings.
Working out a real sale price means more than knocking a percentage off the sticker — tax usually lands on top of the reduced amount. This calculator does both steps in the right order: it takes your discount off the original price, then applies the tax rate to what's left, and shows the final price alongside how much you saved and how much tax was added. Enter the price, the discount, and the tax rate, and it updates as you type, all in your browser.
How the final price is built
The calculation runs in three steps — discount first, then tax on the discounted amount:
Saved = P × D ÷ 100 • Net = P − Saved • Final = Net + (Net × T ÷ 100)
For a $80 item at 25% off with 8% tax, you save $20, leaving $60, and $4.80 of tax brings the final price to $64.80. Applying tax to the discounted amount — rather than the original — matters, because taxing before the discount would overstate the total. The tax field is optional; leave it at zero to see just the discounted price and savings.
A note on how stores calculate tax
In most places sales tax is charged on the price you actually pay, so applying it after the discount — as this tool does — matches a typical receipt. Rules can vary by region and by the type of promotion (a coupon versus a manufacturer rebate, for instance, can be treated differently), so if you need an exact figure for a specific jurisdiction, check the local rule. For everyday shopping and budgeting, this gives a reliable final number.
Frequently Asked Questions
Does it apply the discount before or after tax?
Before. It subtracts the discount from the original price first, then calculates tax on the reduced amount — which is how most receipts work.
Can I use it without a tax rate?
Yes. Leave the tax field at zero and you'll see the discounted price and your savings with no tax added.
Can I stack two discounts?
Not in one step. To model a second discount, take the final price from the first calculation and enter it as the new starting price with the second percentage.
Is my data saved?
No. Everything is calculated in your browser and nothing you enter is uploaded or stored.