Sale season in India — whether it's Amazon Great Indian Festival, Flipkart Big Billion Days, or end-of-season retail sales — is full of confusing discount claims. "Up to 80% off", "Extra 10% with HDFC card", "Buy 2 get 30% off" — calculating the actual price and actual savings takes a moment. Here's how to do it correctly every time.
Simple Discount Formula
Discount Amount = MRP × Discount% ÷ 100
Sale Price = MRP − Discount Amount
= MRP × (1 − Discount% ÷ 100)
Example: MRP ₹2,000 with 30% off = ₹2,000 × 0.70 = ₹1,400 sale price. You save ₹600.
Double Discount (Successive Discounts)
When there's a 30% off and then an extra 10% off with a bank card — these are NOT the same as 40% off:
Final Price = MRP × (1 − D1/100) × (1 − D2/100)
₹2,000 with 30% + 10% extra: ₹2,000 × 0.70 × 0.90 = ₹1,260 (saving ₹740 = 37% total off, not 40%)
| Stated Discount | Actual Combined Discount | Effective Saving |
|---|---|---|
| 20% + 10% | 28% | ₹560 on ₹2,000 |
| 30% + 10% | 37% | ₹740 on ₹2,000 |
| 50% + 20% | 60% | ₹1,200 on ₹2,000 |
GST on Discounted Prices
Under GST rules, tax is charged on the actual transaction value (post-discount), not the MRP. So if MRP is ₹2,000 and you get 30% off to ₹1,400, GST is charged on ₹1,400. This is why post-discount prices inclusive of GST are lower than MRP.
Use our Discount Calculator to calculate final price, savings amount and effective discount percentage for any combination of discounts instantly.