There is no universal “good ROAS.” A 2x ROAS can be excellent for one business and disastrous for another. Your required ROAS depends mainly on how much contribution margin remains after fulfilling an order.
Why 4x is not automatically good
ROAS only compares attributed revenue with advertising cost. It does not tell you how much of that revenue remains after product cost, shipping, processing, refunds and other variable costs.
Start with your own breakeven point
If your breakeven ROAS is 2.2x, then a 3.0x ROAS may leave meaningful room for profit. If your breakeven ROAS is 3.5x, the same 3.0x performance is below break-even.
Find your number
Don't optimize toward a generic benchmark. Calculate the minimum ROAS your economics require.
Use the free ROAS calculatorSet a target above breakeven
Once you know breakeven ROAS, choose a target that also leaves enough contribution for overhead and your desired net margin. The calculator can estimate this target using your selected profit goal.
Use ROAS together with CPA
Your maximum CPA often gives media buyers a more direct bidding guardrail. A healthy campaign should keep acquisition cost below the contribution margin available per new order.