Stop Wasting Money on High ACoS: Top Strategies for Cutting Costs

Most Amazon sellers are unknowingly burning 40–60% of their ad budget on irrelevant clicks. The problem isn't that they're spending too much — it's that they haven't built a system that tells their campaigns where to spend. Here's the exact framework we use to cut ACoS in half without sacrificing sales volume.

Why High ACoS Is a Structural Problem, Not a Bid Problem

The instinct when ACoS spikes is to lower bids. But bid adjustments are a band-aid on a structural wound. If your campaigns are built on broad match keywords with no negative keyword strategy, you're feeding an algorithm that's incentivised to spend your budget — not protect your margin.

We've audited hundreds of Amazon ad accounts. The single most common issue is never the bid level — it's the campaign architecture. Brands running everything in one catch-all Automatic campaign, or using broad match for every keyword, will always struggle to control ACoS regardless of how many bid adjustments they make.

Step 1 — The Negative Keyword Audit

Pull the last 90 days of search term reports. Sort by spend, descending. Every search term that has generated spend but zero conversions after 10+ clicks is a candidate for negation. This single exercise can reduce wasted spend by 20–35% in the first week.

Categorise your negatives into three buckets: irrelevant searches (competitors, unrelated categories), wrong-intent searches (informational queries, "how to"), and poor-converting modifiers (terms that generate clicks but never buy in your category).

Step 2 — Campaign Architecture by Funnel Stage

Separate your campaigns by funnel stage: Awareness (Sponsored Brands, broad reach), Consideration (Sponsored Products, phrase match on category keywords), and Conversion (exact match on your highest-intent, best-converting terms). This lets you assign different target ACoS benchmarks to each layer rather than managing one blended number.

Your conversion campaigns should run at a tighter ACoS — sometimes even at break-even or slight loss — because the organic ranking boost from high sales velocity on those keywords pays dividends that aren't captured in the ad metric alone.

Step 3 — Weekly Optimisation Cadence

ACoS management is a weekly discipline, not a monthly task. Every week: pull search term reports, add negatives, shift budget from underperforming campaigns to high-ROAS campaigns, and review bid adjustments based on the previous 14 days of conversion data at the ASIN level.

The brands that win on Amazon PPC are the ones that treat campaign management like a process, not a project. The framework above isn't complex — but it requires consistency to produce compounding results.

Ready to stop wasting ad budget and start scaling profitably? Book a free Amazon audit and we'll review your account, identify the waste, and show you exactly what's possible.