Spend scaled faster than total sales through a seasonal test window, with TACoS drifting up as the account leaned further into paid share.
This is a live Amazon Ads account in the Phone Cover category, reported over February to April. Phone covers are a fast-moving, price-sensitive category with seasonal and launch-driven spikes.
A seasonal test window saw spend increase faster than total sales, and we think the lesson is more useful than a tidy success story.
Spend rose 15% over the window.
In April, ad spend was 15.85% of total sales, organic included. TACoS drifting up means ads were taking a larger share of the account's sales.
Total sales grew only 4%, so spend grew considerably faster than sales.
Spend scaled faster than total sales through the test, and TACoS drifted up as the account leaned further into paid share.
That is the signal we look for to say the test has gone far enough. It told us to slow down and tighten rather than push further.
What happens next. We are rebalancing toward the products and search terms that grow total sales, and watching TACoS to see whether it settles back.
Anonymised by category, not brand — client privacy. Figures are the account's reported metrics for the window shown. Not a forecast or a guarantee of results.
These short guides explain the terms and decisions behind this account.
Ad spend scaled aggressively while ACOS held steady — paid growth pulled organic sales up with it instead of cannibalising it.
ACOS wobbled through a mid-year test before settling back down, while TACOS and daily run rate improved through the same window.
Spend scaled 5.7x in three months to capture more inventory. Efficiency softened as expected with that scale, but total sales still grew well ahead of it.
The free audit maps spend, structure and catalogue health, and flags where efficiency is leaking.