Understanding Break-Even ACoS

Break-Even ACoS = (Price − COGS − FBA Fees) / Price × 100

If your product sells at $35, costs $8 to make, and has $7 in FBA fees:

Break-Even ACoS = ($35 − $8 − $7) / $35 = 57%

Any ACoS below 57% is profitable. Target ACoS = Break-Even × 0.6 for healthy margins.

7 Ways to Lower ACoS

1. Harvest and Negate — Review your Search Term Report weekly. Any term with >10 clicks and 0 conversions gets added as a Negative Exact.

2. Bid Down Low Performers — Keywords with ACoS > Break-Even for 30 days get a 20% bid reduction. Repeat until profitable or paused.

3. Dayparting — Use niche.ltd's Dayparting tool to pause ads during low-conversion hours (typically 1–6 AM).

4. Exact Match Isolation — Move your top converters to Exact Match campaigns. Exact keywords waste less on irrelevant searches.

5. Portfolio Budget Caps — Set portfolio budgets to prevent your best campaign from eating your entire budget on the first day.

6. Improve Listing Conversion — A 1% improvement in CVR drops ACoS by ~10% with no bid changes. Test your main image and price point.

7. Negative Keyword Sculpting — Prevent keywords from triggering in multiple campaigns at the same time (causes internal bid competition).

Using niche.ltd's ACoS Tools

  • PPC Analytics Dashboard — See ACoS by keyword, product, and campaign
  • Keyword Harvest — Auto-suggest negative keywords from Search Term Report
  • Bid Optimizer — Set target ACoS and let AI adjust bids automatically