Tool
Discount calculator
Apply a discount to a price to see the final price and your savings; or enter the original and final price to find the implied discount.
Final price
—
With the discount applied
You save—
Total effective discount—
Assumptions & method
- Final price = price × (1 − d1) × (1 − d2): chained discounts multiply, they don't add up.
- “25% + an extra 10%” equals 32.5% effective, not 35% — the classic sale-price trap.
- Implied discount = 1 − (final price ÷ original price).
- Percentages apply to the displayed price; if the price includes IVA (Mexican value-added tax), the discount includes it proportionally too.
FAQ
The essentials, in short
Why is 25% + 10% not 35%?
Because the second discount applies to the already-reduced price: $1,000 − 25% = $750; $750 − 10% = $675, which is 32.5% off the original price. Retailers know this; now you do too.
How do I find the real discount between two prices?
Divide the final price by the original and subtract from 1: from $1,500 to $1,125 is 25%. That's the 'implied' mode of this calculator — handy for checking 'was/now' offers.
Does a discount affect IVA?
IVA is calculated on the already-discounted price, so you also save the proportional IVA. On the invoice, the discount must be itemized before the tax.
Next step
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