TACoS

What is the TACoS formula?

TACoS equals total ad spend divided by total revenue, expressed as a percentage. The denominator is everything you sold — advertised and organic — over the same period. That is the only difference from ACoS, and it changes what the number means entirely.

ACoS asks whether an ad paid for itself. TACoS asks whether your advertising is buying you a business. Those questions have different answers surprisingly often, which is why an account can post excellent ACoS while its TACoS quietly deteriorates.

• TACoS = ad spend ÷ total revenue × 100
• ACoS = ad spend ÷ ad-attributed revenue × 100
• Falling TACoS at steady spend: organic is compounding. This is the shape you want.
• Rising TACoS at steady revenue: you are paying more to stand still. Diagnose before optimising.
• Rising TACoS with rising revenue: acceptable during a deliberate rank push, not acceptable as a permanent state.

What TACoS is normal?

There is no single answer, which is why we publish the range we actually operate in instead of inventing a benchmark. In one month's portfolio snapshot our managed accounts ran from 8.7% on a mature recovery-device brand to about 21% on a hair-care brand in the middle of a turnaround, with most healthy accounts clustered between 9% and 12%.

For an established, review-rich brand we tell people to aim under 15%. A 10–12% TACoS paired with a 25–30% ACoS is what a healthy, profitable supplement account tends to look like. Above roughly 20% we treat it as a trigger to cut spend rather than a number to explain.

Underspending is a real failure mode too. We have seen brands sitting at 5% TACoS while sales fell 40% — the ad account was not the problem, the absence of one was.

When should TACoS be allowed to rise?

Deliberately, and with a date attached. The one case where we raise the TACoS ceiling on purpose is a rank sprint: lift the ceiling from 10% to somewhere between 15% and 23% for four to six weeks, buy position, then scale back once rank holds.

In one hair-care account that sprint took weekly PPC spend from about $5K to $9.6K, moved impressions from 0.9M to 1.3M, roughly doubled clicks, produced a record 21,200 sessions in a week — beating Prime week — and lifted weekly revenue from a $58K trough to $77K.

The discipline is that the ceiling comes back down. A raised TACoS target with no end date is not a growth strategy, it is a slowly failing account. See buying rank on purpose for the full sequence.

Which one should you actually optimise?

Optimise profit dollars, and use TACoS as the guardrail rather than the goal. We have watched a TACoS increase from 15% to 20% cost $5,000 of profit and conclude nothing — the metric moved, the business got worse.

In practice we report both: ACoS to judge individual campaign decisions, TACoS to judge whether the whole advertising programme is earning its place. Read ACoS vs TACoS for how the two get used in the same weekly review.