Percent Off Calculator
Calculate the final price after one or two stacked discounts, plus GST on the price. See the total savings and the effective discount instantly.
A second discount applied on top, e.g. a festival offer.
Final price
₹2,000
You save
₹500
20% off the original price
GST on final price
₹0
₹2,000 × 0%
Total to pay
₹2,000
Final price + GST
Stacked discounts apply one after the other — 20% then 10% equals 28% off, not 30%. GST is calculated on the discounted price.
Last updated: March 2026
How this calculator is verified
Checked by True Calculator automated test suite on
- Formula verified against a published worked example in the automated test suite
- Edge cases (zero, negative, boundary and unit-mismatch inputs) covered by unit tests
The full verification method is on our how we verify page. Found an error? Tell us and we will re-check it.
When to Use This Calculator
Use the percent off calculator for every sale price you see, because Indian retail piles discounts on top of each other — a festival sale percentage, an exchange bonus, a card offer — and the combined figure is rarely what the tags suggest. The tool handles both a single cut and a stacked pair, and adds GST so the final bill is realistic instead of just a discounted price. It is equally useful for the other direction: when a shop says '₹400 off' on a ₹2,500 item, that is 16%, and you can compare it against a neighbouring '20% off' deal on the same product. Small business owners quoting discounted prices to customers can verify the GST-inclusive total before printing price tags, and shoppers comparing two shops with different discount structures can reduce both to a final price in one place.
How to Use This Calculator
- Step 1: Enter the original price — the MRP or list price printed on the item.
- Step 2: Enter the main discount percentage.
- Step 3: Add a second (stacked) discount if there is one, such as a card offer on top of a sale.
- Step 4: Enter the GST rate if you want the final bill, then read the savings and total to pay.
Worked Example
A ₹2,500 item with 20% off drops to ₹2,000. A further 10% card offer applies to that ₹2,000, bringing it to ₹1,800 — total savings of ₹700, which is 28% off the original, not 30%. With 18% GST on the discounted price, the final bill is ₹2,124. A single 30% discount on a ₹1,499 product saves ₹449.70 and leaves ₹1,049.30. The stacked-discount math is where the arithmetic usually goes wrong.
Tips and Common Mistakes
- •Tip 1: Two stacked discounts are never the sum of the percentages — 20% then 10% is 28% off, not 30%.
- •Tip 2: GST applies on the discounted price, so compute the discount first, tax second.
- •Tip 3: On 'extra 10% on MRP' tags, check whether the extra applies to MRP or to the sale price.
- ✗Mistake 1: Do not apply GST to the original price and then discount — the order changes the final bill.
- ✗Mistake 2: Do not trust the store's claimed savings percentage; recompute on the actual discounted price.
Frequently Asked Questions
How do stacked discounts work?
Each discount applies to the price after the previous one. A 20% discount followed by 10% gives 28% off overall — not 30% — because the second discount applies to the already-discounted price.
Does GST apply before or after the discount?
GST applies on the discounted price. A ₹2,500 item at 20% off has GST computed on ₹2,000, so your final bill is the discounted price plus GST on that price.
Why do sale prices sometimes differ from my calculation?
Stores may round the final amount, apply discounts to the maximum retail price (MRP) instead of your price, or add service charges. Also check whether the discount already includes the GST benefit or not.
Can I calculate the effective discount of two offers?
Yes — compare the final price under each offer. For example, a flat ₹400 off a ₹2,500 item equals a 16% discount, while '20% off plus 10% extra' equals 28% and wins.
Is the savings percentage the same as the discount percentage?
With a single discount they match. With stacked discounts the savings percentage is the combined figure (28% in the example above), which is what this calculator reports.
Compare these tools
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- Gratuity Calculator (India) — Calculate gratuity under the Payment of Gratuity Act, 1972 with the 15/26 formula and the ₹20 lakh tax-exempt cap for Indian employees
- GST Calculator (India) — Add or remove GST from any amount, with CGST + SGST split for intra-state and IGST for inter-state supplies
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