Discount Calculator
Stack up to two successive discounts on a price and see the final price, how much you save and the true combined discount.
What is a Commercial & Consumer Discount?
A discount is a reduction in the normal or listed retail price (Maximum Retail Price - MRP) of a product or service offered by sellers to incentivize immediate purchase, clear obsolete inventory, or reward volume purchasing. Discounts form the bedrock of consumer merchandising, business-to-business (B2B) trade procurement, and festival sales promotions.
This calculator determines the net payable sale price, total rupee savings, and effective percentage reduction across two common retail structures: Single Flat Discounts (e.g., 30% off MRP) and Successive / Double Discounts (e.g., 30% festive sale discount + an extra 10% instant bank credit card discount).
Single vs Successive (Compound) Discounts Explained
Retailers frequently advertise compound discount promotions such as "40% + 10% Off". A common consumer misconception is assuming this equates to a 50% discount:
- Successive Discount Mechanics: The initial 40% discount applies to the original MRP. The second 10% discount applies strictly to the reduced intermediate price, not the original MRP.
- True Equivalent Discount: A 40% discount followed by a 10% discount produces an effective discount of 46%, not 50%. This calculator prevents retail confusion by exposing the exact net mathematical saving.
The Discount Mathematical Formulas
Single: Price = MRP × (1 − D ÷ 100) | Successive: Price = MRP × (1 − D₁ ÷ 100) × (1 − D₂ ÷ 100)
- MRP: Original catalog or tag price before discounts (in ₹)
- D: Primary discount percentage (e.g., 20% = 0.20)
- D₂: Secondary or payment discount percentage (e.g., 10% card discount)
- Total Savings: MRP − Final Discounted Price (in ₹)
- Effective Overall Discount %: [ (D₁ + D₂) − (D₁ × D₂ ÷ 100) ]
Worked example: ₹2,500 Tag Price with 30% + 10% Discounts
Consider a retail purchase with an original MRP of ₹2,500 with a 30% store discount and an additional 10% instant checkout discount:
- Original MRP: ₹2,500
- Step 1 (30% Store Discount): ₹2,500 × 30% = ₹750 discount → Intermediate Price = ₹1,750
- Step 2 (10% Payment Discount): ₹1,750 × 10% = ₹175 additional discount
- Final Discounted Price: ₹1,750 − ₹175 = ₹1,575
- Total Rupee Savings: ₹750 + ₹175 = ₹925
- Effective Blended Discount: (₹925 ÷ ₹2,500) × 100 = 37.0% (Not 40%)
True Effective Discount Rates for Common Retail Promotions
| Advertised Successive Offer | Intermediate Price on ₹1,000 | Final Payable Price | Actual Rupee Savings | True Effective Discount |
|---|---|---|---|---|
| 10% + 5% Off | ₹900.00 | ₹855.00 | ₹145.00 | 14.5% |
| 20% + 10% Off | ₹800.00 | ₹720.00 | ₹280.00 | 28.0% |
| 30% + 10% Off | ₹700.00 | ₹630.00 | ₹370.00 | 37.0% |
| 40% + 20% Off | ₹600.00 | ₹480.00 | ₹520.00 | 52.0% |
| 50% + 50% Off | ₹500.00 | ₹250.00 | ₹750.00 | 75.0% (Not Free!) |
Trade Discounts vs Cash Discounts in Commercial Accounting
In business procurement, discounts fall into two distinct accounting treatments:
- Trade Discount: Granted upfront on gross list price based on volume or distributor tiers. Deducted directly from the face of the invoice; GST is charged strictly on the net price after trade discount.
- Cash Discount: Granted post-invoicing to incentivize prompt bill payment (e.g., "2/10 Net 30" - 2% discount if paid within 10 days). In GST compliance, cash discounts are allowable as a deduction from turnover only if agreed prior to supply and linked to specific invoices under Section 15(3).
Discount vs Margin vs Markup
Business owners frequently confuse discounting with markup:
- Discount: Calculated downward from Selling Price (e.g., 20% discount on ₹100 = ₹80 price).
- Markup: Calculated upward from Cost Price (e.g., 25% markup on ₹80 cost = ₹100 selling price).
- Profit Margin: Profit divided by Selling Price (₹20 ÷ ₹100 = 20% margin).
Frequently Asked Questions on Discounts
Key insights into successive discounts, "Buy X Get Y" promotions, GST billing rules, and margin calculations.
The first discount (20%) reduces the original price, and the second discount (10%) applies strictly to that lower intermediate figure. For a ₹1,000 item, 20% off leaves ₹800, and 10% off ₹800 leaves ₹720. The total discount is ₹280 or 28%, not 30%.
"Buy 1 Get 1 Free" (BOGO) provides 2 items for the price of 1, representing exactly a 50% discount per item. "Buy 2 Get 1 Free" gives 3 items for the price of 2, representing an effective discount of 1 ÷ 3 = 33.33% per item.
Divide the discounted price by (1 − Discount % as decimal). For example, if you paid ₹1,600 after a 20% discount: Original Price = ₹1,600 ÷ (1 − 0.20) = ₹1,600 ÷ 0.80 = ₹2,000.
Under Section 15 of the CGST Act, GST is charged on the net taxable value after deducting trade discounts shown on the invoice. If a ₹1,000 item has a ₹200 discount, 18% GST is levied on the net ₹800 base (₹144 GST), totaling ₹944.
A trade discount is deducted upfront from catalog prices based on order volume. A cash discount is offered to encourage prompt payment within a specified period (e.g., 2% off if paid in 7 days). Trade discounts directly reduce invoice value, while cash discounts are recorded as financial expenses.
Successive discounts are an effective psychological merchandising tool. "40% + 10%" sounds closer to 50% in a shopper's mind than the actual 46% effective discount, while allowing the retailer to protect their gross profit margins.
A discount reduces the cash outgo immediately at the point of sale. A cashback charges you the full invoice amount upfront and credits virtual wallet balance or bank cash days later, tying you to future purchases with the merchant.
A 20% discount on a ₹100 item brings the price to ₹80. To mark that ₹80 item back up to ₹100 requires a 25% markup (₹20 ÷ ₹80 = 25%). Markup percentage is always mathematically higher than its equivalent discount percentage.
Yes. Discounts granted to customers reduce gross sales revenue, which directly reduces taxable business profits under Section 28 of the Income Tax Act.
A tiered discount offers escalating percentage reductions as order volume increases (e.g., 5% off for 10 units, 10% off for 50 units, 15% off for 100+ units), incentivizing bulk commercial purchasing.