The exact ROAS youcan't go below.
Every account has a line where ad spend stops being an investment and starts being a donation. This finds that line from your real margins, then tells you the ROAS you need for any profit target on top of it.
Your numbers
Revenue per order before costs.
Revenue left after product cost.
As a % of revenue you eat.
Typical promo / coupon as % of revenue.
Profit you want left after ads.
The verdict
Break-even ROAS
2.13×
Target ROAS
3.12×
Break-even CPA
$38
Target CPA
$26
Contribution margin
47.0%
Gross margin minus shipping & discounts.
Max ad spend / order
$38
Most you can pay to acquire one order.
The two lines you're trading between
Reverse-solve · grade a live campaign
What does your real ROAS leave you?
Net margin left
13.7%
Profit / $1k revenue
$137
At 3.00×, ad cost eats 33.3% of revenue against your 47.0% contribution margin — leaving 13.7% net. You're clear of the 2.13× break-even.
Sensitivity · margin moves the line
Break-even & target ROAS by gross margin
| Gross margin | Break-even | Target |
|---|---|---|
| 20% | 14.29× | -12.50× |
| 30% | 5.88× | 50.00× |
| 40% | 3.70× | 8.33× |
| 50% | 2.70× | 4.55× |
| 60% | 2.13× | 3.12× |
| 70% | 1.75× | 2.38× |
| 80% | 1.49× | 1.92× |
| 90% | 1.30× | 1.61× |
Every point of margin you recover lowers the ROAS you have to hit. That's why fixing pricing or COGS often beats optimizing the ad account — it moves the line itself.
Your move
Know your line. Now let's clear it.
Break-even ROAS 2.13×, target 3.12× for a 15% net margin.
If your break even ROAS came back uncomfortably high, the answer is rarely a new ad. It's the offer and the margins underneath it. Send me your numbers and I'll show you the fastest way to lower the bar and clear it.
Plain English
Break even ROAS is your line in the sand.
Break even ROAS is the return at which the margin on a sale exactly covers what you paid to make it. One dollar below it, you're losing money on every order, no matter what the ad platform's dashboard tells you.
It's set entirely by your contribution margin: gross margin minus the shipping, fulfillment, and discounts that quietly eat revenue. The thinner that margin, the higher the ROAS you need just to stand still.
Knowing break even changes how you read every campaign. A 2.5× ROAS is a triumph at 50% margin and a slow bleed at 30%. Target ROAS goes one step further: the return you need not just to survive, but to leave the profit you actually want on the table.
The formula
Break even ROAS = 1 ÷ contribution margin
60% gross margin, minus 8% shipping and 5% discounts = 47% contribution margin. Break even ROAS = 1 ÷ 0.47 = 2.13×. To clear a 15% net margin on top, you need 1 ÷ (0.47 − 0.15) = 3.13×.
Break even came back high. Read it right.
Break even above ~3×.
Your margins are doing the damage, not your ads. Every point of margin you recover drops the ROAS you need. Fix pricing and COGS first.
Discounts are a big slice.
Habitual promos quietly raise your break even. A 15% off default can add a full turn to the ROAS you must hit. Wean the audience off it.
Shipping eats the margin.
Free shipping is a margin decision disguised as a marketing one. Set an order threshold that protects contribution margin instead of giving it away.
Target ROAS feels impossible.
If the math demands a return no channel can deliver, the offer has to change, higher AOV, better margin mix, or a subscription that earns the second purchase for free.
Lower the bar you have to clear
01Raise AOV
Higher order value spreads fixed costs and shrinks the ROAS you need on every sale.
02Protect price
Each discount turn you remove directly lowers break even ROAS, the cheapest fix there is.
03Set a free shipping threshold
Recover fulfillment margin while still nudging bigger carts.
04Improve product margin
Renegotiate COGS or shift mix toward higher margin SKUs to widen the contribution base.
05Add a second purchase
Subscriptions and replenishment turn one expensive acquisition into many cheap repeat orders.
06Bundle low margin items
Pair thin margin products with fat margin ones so the blended order clears your line.
The vocabulary
- Break even ROAS
- The return where margin exactly equals ad spend: 1 ÷ contribution margin.
- Contribution margin
- Gross margin minus variable selling costs (shipping, fulfillment, discounts).
- Target ROAS
- The return needed to hit a chosen net profit margin after ad spend.
- Break even CPA
- The most you can pay to acquire one customer and still break even: AOV × contribution margin.
- Net margin
- Profit left as a percentage of revenue after all costs, including ads.
Break even ROAS, answered
Divide 1 by your contribution margin. If 47 cents of every revenue dollar survives product cost, shipping, and discounts, your break even ROAS is 1 ÷ 0.47 ≈ 2.13×. Beat it and you profit; miss it and you lose.
Keep going
A calculator tells you what. A call tells you what to do about it.
Send me the account behind these numbers. I'll tell you straight where the money's leaking and what I'd fix first — free, and you keep it whether you hire me or not.