How to calculate a discount?

To calculate a discount, multiply the original price by the discount percentage (as a decimal). For example, a 20% discount on a $50 item: $50 x 0.20 = $10 discount. The sale price is $50 - $10 = $40. For dollar-amount discounts, simply subtract the discount from the original price.

How much volume do I need to offset a discount?

The volume increase needed depends on your profit margin. The formula is: Volume Increase = (Original Margin / New Margin) - 1. For example, at a 40% margin, a 20% discount requires you to sell 100% more units (double your volume) to maintain the same total profit.

What is a good discount strategy for ecommerce?

The best ecommerce discount strategies protect margins while driving sales: bundle discounts to increase AOV, volume/tiered discounts to reward bigger orders, conditional discounts like free shipping thresholds, time-limited offers for urgency, and loyalty-only discounts to reward retention over acquisition.

Should I offer percentage or dollar discounts?

Use the Rule of 100: for items under $100, percentage discounts feel larger (20% off $50 sounds better than $10 off). For items over $100, dollar discounts feel larger ($25 off $200 sounds better than 12.5% off). From a margin perspective, both are equivalent at the same dollar amount.

How to discount without destroying margins?

Set minimum margin thresholds and never discount below them. Use bundles to maintain per-unit margins while offering perceived savings. Discount slow-moving inventory selectively rather than running blanket sales. Track actual margin impact in real-time, and calculate your break-even volume before running any promotion.

Discount Calculator

Calculate discounts and see what they actually cost you. A 20% discount doesn't mean you need 20% more sales to break even.

Enter Your Numbers

Original Price

Discount Type

Discount Value

Profit Impact (optional)

Cost per Unit

Your all-in cost to fulfill one unit

Current Monthly Volume

Units sold per month at original price

Results

Enter a price and discount to see results

How Discounts Really Affect Your Profit

A 20% discount does not cost you 20% of your profit. It costs much more. This is the most dangerous misconception in ecommerce pricing, and it catches even experienced merchants off guard.

Here is why: discounts reduce revenue, but your costs stay the same. If you sell a $50 product that costs you $30 to fulfill (a 40% margin), your profit per unit is $20. Apply a 20% discount and the price drops to $40 - but your cost is still $30. Your new profit per unit is just $10. That 20% discount just eliminated 50% of your profit.

The math gets worse at lower margins. At a 30% margin, a 20% discount wipes out 67% of your per-unit profit. At a 25% margin, a 20% discount eliminates 80% of your profit. And at margins below the discount percentage, you are literally paying customers to buy from you.

This is why the profit impact analysis in our calculator exists. Before running any promotion, you need to know the real cost - not just the discount amount, but the volume increase required to maintain your total profit. That number is almost always larger than merchants expect.

Smart Discounting Strategies for Ecommerce

1. Bundle Discounts

Instead of discounting a single product, bundle complementary items at a slight overall discount. A "Buy 2, Save 10%" offer increases AOV while the per-unit margin drop is smaller than a straight 10% discount on individual items. Customers perceive high value, and you move more inventory with better unit economics.

2. Volume/Tiered Discounts

Offer increasing discounts at higher quantities: 5% off 2 units, 10% off 3, 15% off 5+. This rewards larger orders and improves your shipping cost per unit. The key is setting tiers where the incremental margin on additional units still exceeds your variable costs. The result is higher order values with controlled margin impact.

3. Conditional Discounts

Free shipping thresholds, gifts with purchase above a certain amount, or percentage discounts that only unlock at a minimum cart value. These increase AOV while limiting margin erosion because you only discount on orders that already exceed your profitability threshold. Free shipping thresholds consistently increase AOV by encouraging customers to add items to reach the threshold.

4. Time-Limited Offers

Flash sales, weekend deals, and holiday promotions create urgency without permanently eroding your price point. The critical rule: never run them so frequently that customers learn to wait for the next sale. Brands that discount too frequently see meaningfully lower margins even on full-price periods because customers have been trained to expect deals.

5. Loyalty-Only Discounts

Reserve your best discounts for repeat customers. Their acquisition cost is already paid, so the margin math is fundamentally different. A 15% loyalty discount for a returning customer with $0 acquisition cost is more profitable than a full-price sale to a new customer acquired at $50 CAC. This strategy rewards retention - the single highest-leverage metric in DTC.

Discount Impact by Margin Level

This table shows the volume increase needed to maintain the same total profit at different margin and discount levels. The numbers reveal why discounting is a dangerous game at low margins.

Margin / Discount	10% Off	15% Off	20% Off	25% Off	30% Off
30% Margin	+35%	+70%	+140%	+350%	Loss
40% Margin	+20%	+36%	+60%	+100%	+180%
50% Margin	+13%	+21%	+33%	+50%	+75%
60% Margin	+8%	+13%	+20%	+29%	+40%

Key insight: at a 40% margin, a 20% discount requires you to sell 100% more units - double your volume - just to break even on profit. At a 30% margin, a 30% discount is a guaranteed loss on every unit. Always run these numbers before committing to a promotion.

Lifetimely by Amp tracks how every discount, promotion, and coupon code affects your real margins - across every product, order, and channel. See the true cost of your promotions in real-time.

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