CPA vs ROAS: What Sellers Should Track

CPA (cost per acquisition) and ROAS (return on ad spend) are often treated as competing metrics, but they describe the same underlying profitability limit from two different angles.

CPA: a rupee ceiling per order

Maximum CPA tells you the most you can spend to acquire one order before it stops being profitable xe2x80x94 useful when thinking in terms of a bid cap or per-order ad budget. See the Maximum CPA Calculator.

ROAS: a ratio

Break-even ROAS expresses the same limit as a multiple of ad spend to revenue xe2x80x94 easier to compare across products with different price points, since it is not tied to a rupee amount.

Which should you track?

Ad platforms report one or the other depending on the campaign objective xe2x80x94 track whichever your platform reports by default, but understand both, since they will not always move together as your costs change.