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Marketing and retention

How to run discounts without destroying your margin

Use break-even maths to decide how deep a discount can go, which offers protect profit (bundles, thresholds, gifts) and how to measure real incremental sales.

By Orvexa TeamUpdated 3 min read
Trays of colourful decorative ornaments in Jaipur
Photo: Ninara, CC BY 2.0 · All photo credits
Key takeaways
  • A discount of d on a margin of m needs unit sales to rise by d ÷ (m − d) just to break even
  • Bundles, free-shipping thresholds and gifts often protect margin better than percentage discounts
  • Measure incremental sales, not just total sales during the offer

Discounts bring sales. They also teach customers to wait for the next sale, and they quietly eat profit. Use maths before you press publish.

The break-even rule

If your margin per unit is m (as a share of price) and you give a discount d (also as a share of price), you need unit sales to rise by:

Required lift = d ÷ (m − d)

Example: your contribution margin is 40% and you offer 10% off. Required lift = 0.10 ÷ (0.40 − 0.10) = 0.33, so you need 33% more units just to earn the same profit. At a 15% discount you need 60% more. At 20% you need 100% more. Deep discounts demand big increases.

Offers that often protect margin

OfferWhy it can work
Bundles ("buy 2, save ₹150")Lifts order value and shifts stock together
Free shipping above a thresholdRaises basket size without cutting product price
Gift with purchasePerceived value is high, real cost is low
First-order offerTargets new customers only, with a cap
Loyalty rewardsRewards repeat buyers, not one-time deal hunters (loyalty)
Limited, real eventsFestive or end-of-season sales that are genuine

Offers that often hurt

  • Permanent "sale" pricing, which makes the full price meaningless.
  • Site-wide percentage cuts that subsidise purchases that would have happened anyway.
  • Stackable codes that combine into losses.
  • Public codes that leak to coupon sites.

Plan before you launch

  1. Set the floor. Compute the lowest price at which each product still earns your minimum profit (pricing guide).
  2. Choose the product set. Discount slow movers and high-margin items, not best sellers that sell anyway.
  3. Cap it. Limit by time, quantity or customer type.
  4. Be truthful. Do not invent a higher "original" price. Consumer rules in India act against misleading pricing.
  5. Prepare operations. More orders mean more shipping and support.

Measure properly

Compare the offer period with a similar period without one, and ideally with a control group that did not see the offer. Track:

  • Incremental orders and revenue.
  • Profit per order, after the discount.
  • New vs returning customers.
  • Return rate and COD share (COD returns).
  • Repeat purchases in the next 60 days: did buyers return at full price?

Festive sales

Festive periods justify genuine offers, but plan stock, couriers and support first (festive playbook). A few well-chosen offers beat a blanket sale.

What to do next

Calculate the required lift for your next planned discount. If the lift looks unrealistic, switch to a bundle or a threshold offer.

Frequently asked questions

Is free shipping better than a discount?

Often it is, because it lifts basket size without lowering product price. It depends on your shipping cost and average order value, so run the numbers.

How often can I run sales?

Fewer, clearer sales train customers less than constant discounting. Many brands limit themselves to a handful of real events a year.

What about first-order discounts?

They are common and effective if capped and not stackable. Measure whether those customers come back.

Topics:discountsmarginpromotionspricingoffers

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