Guide
Amazon ACoS too high? 7 fixes that work in 2026
Seven action-first fixes, in priority order. Most sellers see 10–20% ACoS improvement within 30 days when fixes 1, 2, and 3 are applied together.
Last updated: June 2026
Short answer: the fastest ACoS reduction comes from negative-keyword harvesting plus broad-match bid cuts plus dayparting. AIAdKing automates all three daily; you can also do them manually using the steps below.
1. Harvest negative keywords
Pull your last 60 days of search-term reports. Add as negatives any term with 10+ clicks and zero conversions, or with spend exceeding 2x your target cost-per-acquisition. See the full guide.
2. Cut bids on losing match types
Broad match typically has highest ACoS because it shows your ads against tangentially related searches. Cut broad bids 30%, keep exact match untouched. Monitor 7 days before further changes.
3. Enable dayparting
Most categories convert poorly between 2am and 6am local time. Dial bids down by 50% in those hours. See the AIAdKing dayparting feature.
4. Rewrite the listing copy
High ACoS often signals a listing-to-search mismatch. Rewrite your title and first two bullets so the keywords driving your ad spend actually match buyer intent. See the listing optimization playbook.
5. Cap underperforming budgets
For any campaign with ACoS above 40%, cap its daily budget at 50% of current while you diagnose. This stops the bleed.
6. Move spend to top-of-search
Top-of-search placements convert 2–3x better. Increase top-of-search bid adjustment by 30%, decrease rest-of-search by 20%. Net spend stays similar; conversions go up.
7. Audit weekly with AI narrative
AIAdKing's account audit reports ad spend, ASIN-level ACoS, and where money is leaking in a 1-paragraph AI narrative. Read it weekly.
Let AIAdKing do this daily.
Negative keyword harvesting + bid cuts + dayparting, automated. 14 days free. No card.
Start free for 14 days$49/month after trial. Cancel anytime. Stripe billing.