The short answer
A target ROAS is a goal; actual ROAS is a measured result under a defined reporting method. Your business may also have a required ROAS based on costs. Keep those three concepts separate when deciding whether a campaign is meeting expectations.
Identify which target you mean
An economic requirement comes from contribution and profit assumptions. A platform bidding target is an instruction to an advertising system. Google describes Target ROAS as a strategy that aims for conversion value per cost consistent with the target across conversions; individual conversions can differ. See the official Target ROAS documentation for current details.
Compare a goal with an observation
Illustrative inputs: the bidding goal is 400%, equivalent to 4×. The reported period has $2,000 spend and $7,000 conversion value, giving $7,000 ÷ $2,000 = 3.5×, or 350%. The gap is 50 percentage points in percentage notation. Relative to the 4× goal, the measured ratio is (3.5 − 4) ÷ 4 × 100% = −12.5%.
Check what the conversion value represents
If values reflect modeled leads, profit proxies, or assigned scores, the resulting ratio is not automatically revenue ROAS. Verify the conversion actions and value basis before comparing it with a revenue-based economic threshold. A precise target on an inconsistent value signal does not make the business comparison meaningful.
Allow the observation to mature
Check conversion delay, the reporting window, and whether the target changed during the period. A period spanning different goals may need a more careful comparison than using only the current setting. Record both the settings and extraction date with the report.
Do not assume a higher target creates better economics
Changing the target is not a guarantee of a higher realized return at the same volume. Evaluate spend, conversion value, contribution, and order counts together. If the cost model requires a return that current campaigns cannot support, the decision may involve the offer, costs, measurement, or testing approach as well as bidding.
Use the calculator to check the actual ratio from consistent totals. Keep the economic threshold visible beside it, and label any proposed target as a planning choice until results are observed.
Label all three numbers
- Gather: Record the cost-based requirement, platform bid target and actual conversion value per spend.
- Produce: Check that the conversion value is on the same revenue basis before comparing.
Decision boundary: A bidding target is an instruction, not a guaranteed future result.
Next reading
Examples are illustrative, not client results or benchmarks. The calculations use the inputs shown; real-world decisions depend on your records and assumptions. Report a correction.