Discount & Margin Impact Calculator
See exactly how a discount affects your gross margin — and how much extra volume you need to compensate for the margin loss.
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How this calculator works
Discounts feel good to give but are mathematically brutal on margins. A 20% discount on a product with 40% gross margin requires 100% more volume just to maintain the same gross profit. This calculator shows the volume increase needed to break even on any discount, preventing impulsive discounting.
New margin = (Discounted price − COGS) ÷ Discounted price | Break-even volume increase = Discount% ÷ (Original margin% − Discount%) × 100
Last updated: March 2026 · Rates and slabs updated for FY 2025-26
Discounts compound dangerously
Once you train customers to expect discounts, full-price sales become nearly impossible. Use sparingly and strategically.
Offer value instead
Add free shipping, extended warranty, or a bonus product instead of discounting price — same customer perception, better margin.
Calculate break-even first
Always run this calculator before approving any discount. Know what volume increase is required to justify it.
Frequently Asked Questions
Once you train customers to expect discounts, full-price sales become nearly impossible. Use sparingly and strategically.
Add free shipping, extended warranty, or a bonus product instead of discounting price — same customer perception, better margin.
Always run this calculator before approving any discount. Know what volume increase is required to justify it.