Discount + Sales Tax Calculator
See the real checkout price after both discount and tax — no surprises at the register.
Does It Matter If Tax Is Applied Before or After a Discount?
Here's a reassuring fact: mathematically, the final amount is the same whether tax is calculated before or after the discount.
This is because multiplication is commutative. However, in practice, stores almost always apply the discount first, then charge tax on the reduced amount — which is what customers expect to see on receipts.
US Sales Tax Rates by State (Common Rates)
| State | Rate | 10% off $100 + Tax |
|---|---|---|
| Oregon | 0% | $90.00 |
| Colorado | 2.9% | $92.61 |
| New York | 4% | $93.60 |
| Florida | 6% | $95.40 |
| Texas | 6.25% | $95.63 |
| California | 7.25% | $96.53 |
| Tennessee | 7% | $96.30 |
| Louisiana | 4.45% | $94.01 |
Note: Many states have additional local taxes. Always check your local combined rate.
Frequently Asked Questions
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