Reference
$100 order · contribution before advertising
Maximum CPA equals pre-ad contribution. Break-even ROAS equals revenue divided by maximum CPA. Replace the illustrative $100 revenue with your actual order value in the calculator.
| Pre-ad contribution margin | Maximum CPA | Break-even ROAS |
|---|---|---|
| 10% | $10.00 | 10.00× |
| 15% | $15.00 | 6.67× |
| 20% | $20.00 | 5.00× |
| 25% | $25.00 | 4.00× |
| 30% | $30.00 | 3.33× |
| 35% | $35.00 | 2.86× |
| 40% | $40.00 | 2.50× |
| 45% | $45.00 | 2.22× |
| 50% | $50.00 | 2.00× |
Formula
Maximum CPA = order revenue × pre-ad contribution margin. Break-even ROAS = order revenue ÷ maximum CPA. This table assumes $100 order revenue only to make the ratios easy to inspect.