Calculadora Preço com Desconto + Imposto

The discount is always applied first. Tax is calculated on the discounted (sale) price, not the original price. Legally and mathematically: Sale Price = Original × (1 − discount%), Tax = Sale Price × tax rate, Final = Sale Price + Tax.

10% off $100 = $90 sale price. Then 8% tax on $90 = $7.20. Final price = $90 + $7.20 = $97.20. You save $10 on the discount but pay $7.20 in tax.

Yes, in high-tax states with small discounts. Example: $100 item with 5% off ($95) in Tennessee (9.5% average tax) → $95 + $9.025 tax = $104.025 final — more than the original $100. This is why always calculating your final out-of-pocket price matters.

In the US, sales tax is always calculated on the sale (discounted) price, not the original MSRP. This is the law in all 50 states. So 10% off a $100 item means you pay tax on $90, not $100 — saving you money both on the discount AND on the tax amount.