/ Marketing

Break-Even ROAS Calculator

Vanity metrics kill businesses. Know your floor.

Break-even ROAS is one divided by your gross margin as a ratio. If your gross margin is 40% (0.40), your break-even ROAS is 1 / 0.40 = 2.5x, so every euro of ad spend has to return at least 2.50 euros just to cover product cost and merchant fees. Drop below that ratio and you lose money on every sale, no matter how good the campaign looks.

How it's calculated

Gross margin is the share of each sale left after product cost and merchant fees: (AOV - COGS - fees) / AOV. Break-even ROAS is one divided by that margin. A 40% margin needs 2.5x, a 25% margin needs 4x, a 50% margin needs 2x. Add a target profit and the required ROAS climbs, because ad spend now has to fund COGS, fees, and profit too.

Worked examples

Break-even ROAS at a few common gross margins:

Gross margin Break-even ROAS
20% 5.00x
25% 4.00x
30% 3.33x
40% 2.50x
50% 2.00x
60% 1.67x

How it works

Enter your Average Order Value (AOV).

Subtract COGS (Product + Shipping).

Factor in Merchant Fees (Stripe/PayPal).

Set your desired Net Profit margin.

The remainder is your Max CPA (Cost Per Acquisition).

Why it matters

Most dropshippers and e-com founders focus on revenue. But if your ROAS floor is 3.5x and you're celebrating 2.0x, you are scaling a loss.

This tool visualizes exactly where every dollar goes, so you know your "Walk Away" number.

The Math

Max CPA = AOV - COGS - Fees - Profit
Min ROAS = AOV / Max CPA

Standard (2.9% + €0.30)

Set to 0% for Breakeven ROAS.

IMPOSSIBLE
Costs > Price
TARGET ROAS REQUIRED
0.00x
Max CPA: €0.00
Ads
Profit
Fees
COGS
Ads
Profit
Fees
COGS

Questions people ask

What is break-even ROAS?

Break-even ROAS is the return on ad spend where a campaign makes zero profit and zero loss. Revenue from the ads exactly covers the product cost (COGS), merchant fees, and the ad spend itself. Any ROAS above it earns profit, any ROAS below it burns cash. It is your floor, the number you have to beat to scale without losing money.

How do you calculate break-even ROAS?

Divide 1 by your gross margin expressed as a ratio. Gross margin is (AOV - COGS - fees) / AOV. If your margin is 40%, that is 0.40, so break-even ROAS is 1 / 0.40 = 2.5x. A 25% margin needs 4x, a 50% margin needs 2x. The thinner the margin, the higher the ROAS you need just to stay level.

What is a good ROAS?

There is no universal number, because it depends on your margin. A 3x ROAS is great on a 20% margin and a slow bleed on a 60% margin. Compare every campaign against your own break-even ROAS, not an industry average. A good ROAS is one that clears break-even with enough headroom to fund profit and overhead.