Discount Calculator

Every shopper encounters percentage discounts constantly — seasonal sales, online promo codes, bulk pricing, loyalty rewards, and clearance events all express savings as a percentage off the original price. This discount calculator shows the exact final price, the amount you save, and the after-tax total in a single step. Knowing the true cost before you reach the checkout prevents budget surprises, especially when combining a percentage discount with a variable sales tax. US sales tax rates range from 0% in states like Oregon and Montana to over 10% in some cities when state and local rates are combined. Entering your local tax rate gives you the precise out-of-pocket amount, not just the headline sale price. Retail buyers, resellers, and procurement managers use this calculation when evaluating bulk discounts from suppliers. A 15% reduction on a $50,000 order represents a specific dollar figure per unit that matters for margin analysis and competitive pricing decisions. Online shoppers benefit from running a quick check before assuming a sale represents genuine value. Retailers sometimes inflate original prices before applying a headline discount, so comparing the discounted final price against competitors is always worthwhile. The savings field makes this comparison concrete — a 10% discount on a $20 item saves $2.00, while the same rate on a $2,000 purchase saves $200. The calculator handles all three figures instantly and applies the correct order of operations: discount first, then tax.

The discount calculator applies up to three sequential formulas. First, the savings amount is calculated by multiplying the original price by the discount rate expressed as a decimal: Savings = Original Price × (Discount% ÷ 100). For a $120 item at 25% off: $120 × 0.25 = $30.00 saved. Second, the sale price before tax is found by subtracting savings from the original: Sale Price = Original Price − Savings, giving $120 − $30 = $90.00. Third, if a sales tax rate is provided, the tax is calculated on the discounted price — not the original — since sales tax is assessed on the actual transaction amount at the point of sale: Tax Amount = Sale Price × (Tax Rate ÷ 100). The final price is then: Final Price = Sale Price + Tax Amount. This order of operations is important. In all US retail transactions, discounts are applied first and tax is computed on the reduced amount. Applying tax before the discount would overstate the true cost. A practical extension of this calculation is understanding stacked discounts: two successive discounts of 20% and 10% are not equivalent to a single 30% discount. Instead, you pay 80% of the original after the first discount, then 90% of that, resulting in 0.80 × 0.90 = 0.72, meaning you pay 72% — a 28% total reduction, not 30%. This calculator handles single percentage discounts with optional sales tax.