Loss Leader Calculator
Evaluate whether a loss leader pays for itself through attach sales and repeat purchases, and calculate the attach rate required to break even.
🎪 Pricing📐 Breakeven attach rate = loss per leader unit / contribution per attached item💼 Business
Loss leader selling price
Loss leader cost
Attached item average contribution
Actual attach rate (%)
Loss leader units sold
Repeat purchase uplift (%)
Please enter valid values.
Formula & Reference
| Variable | Symbol | Formula | Units |
|---|---|---|---|
| Loss Leader Calculator | — | Breakeven attach rate = loss per leader unit / contribution per attached item | percent |
Step-by-Step Examples
Example 1
Working Loss Leader
Price 12, cost 16, attached contribution 22, 45% attach rate, 2,400 units, 15% repeat uplift.
- Loss per unit = 16 − 12 = 4
- Breakeven attach = 4 / 22 = 18.2%
- At 45% attach: 1,080 attached sales × 22 = 23,760
- Loss on leaders = 9,600
- Net = +14,160
✓ 18.2% breakeven, 45% actual — works
Example 2
Failing Loss Leader
Price 12, cost 16, attached contribution 9, 20% attach rate.
- Breakeven attach = 4 / 9 = 44.4%
- Actual attach 20% is well below breakeven
- Low-contribution attach items cannot support the loss
✓ 44.4% needed, 20% actual — loses money
Example 3
Not Actually a Loss
Price 18, cost 16.
- Price exceeds cost by 2 per unit
- This is a low-margin item, not a loss leader
- No attach rate is required to justify it
✓ Contributes 2 per unit
Real-World Applications
Traffic Driving
Loss leaders bring customers into a store or site where they encounter full-margin products.
Attach Rate Discipline
Calculating the breakeven attach rate turns a marketing instinct into a testable threshold.
Lifetime Value
Loss leaders that acquire repeat customers can be justified on lifetime value even when the single transaction loses money.
Item Selection
The best loss leaders have high perceived value and natural complementary purchases.
Common Mistakes to Avoid
⚠️
Choosing loss leaders without natural attachments
An item with nothing to attach to generates traffic that buys only the discounted product, which is pure loss.
⚠️
Ignoring cherry-picking customers
Some shoppers buy only the loss leader and nothing else. The measured attach rate must reflect actual behaviour, not the hoped-for rate.
⚠️
Overlooking below-cost selling regulations
Some jurisdictions restrict or prohibit sustained below-cost selling. Worth checking before making it a standing strategy.
Frequently Asked Questions
What is a loss leader? ▾
A product priced deliberately below cost to attract customers, on the expectation they will also buy full-margin items.
How do I calculate the breakeven attach rate? ▾
Divide the loss per leader unit by the contribution per attached item. That percentage of buyers must also purchase an attached product.
What makes a good loss leader? ▾
High perceived value, frequent purchase, easily price-compared, and with natural complementary products that carry strong margin.
What is cherry-picking? ▾
Customers who buy only the discounted item and nothing else. A high cherry-picking rate can make the strategy unprofitable regardless of headline traffic.
Is below-cost selling always legal? ▾
Not everywhere. Some jurisdictions restrict sustained below-cost pricing under unfair competition rules, so it is worth verifying locally.