About the discount & sales tax calculator
Shelf tags show the discount but not what you’ll actually pay. Enter the original price, the discount, and your local sales tax rate to see the final total. Tax is applied to the discounted price.
How to use this calculator
- Enter the original price.
- Enter the discount percentage.
- Enter your sales tax rate, or leave it at 0.
Worked examples
- Sale price: 80 × 0.75 = $60
- 8% tax: $4.80
Total $64.80; you save $20.
Measurement guidance
Stacked discounts
Two discounts usually apply one after the other: 20% then 10% off is 28% off, not 30%.
Frequently asked questions
Is tax charged before or after the discount?
Usually after. This calculator applies tax to the sale price.
What tax rate should I use?
Your combined state and local rate (or VAT/GST where prices may already include it).
How do I do two discounts?
Run the calculator twice, using the first sale price as the second original price.