Google Ads CPA too high? These 8 tactics reduce cost per acquisition across Search, Shopping, and Performance Max — from...
Max CPA = Conversion Value × Gross Margin. At $200 AOV and 35% margin, max CPA = $70. Setting target CPA above this means every conversion loses money. Most accounts optimize CPA without knowing their ceiling — calculate yours first, then work backwards to what needs to change.
Sort your keywords by cost, descending. Any keyword with spend exceeding 2–3× your target CPA and zero conversions in the last 30 days should be paused or moved to a separate test campaign. These are your CPA anchors — removing them often cuts blended CPA by 20–40% immediately.
Google's Quality Score factors in landing page experience, which directly affects CPC. But more importantly, each second of mobile load time reduces conversion rate by 7–12%. A page loading in 5 seconds vs. 2 seconds can have 2× the CPA for identical traffic. Use Google PageSpeed Insights — mobile score matters most.
Maximize Conversions will spend your entire budget to get conversions regardless of cost. Once you have 30+ conversions in a campaign, switching to Target CPA gives Google's algorithm a profitability constraint to work within. This typically reduces CPA by 10–25% within 2–4 weeks as the algorithm calibrates.
Pull your CPA by geographic region — most accounts have significant variation. Locations with CPA 2× above target should receive negative bid adjustments of 30–50%. Locations with CPA well below target can absorb positive adjustments to capture more of that efficient inventory.
Broad match keywords can trigger searches far outside your intended category, generating clicks that never convert. Review your Search Terms report for irrelevant queries. Shift volume from broad to phrase or exact match for your highest-spend keywords — and add the irrelevant terms as negatives.
Ads with specific numbers and offers ('Get 3 quotes in 60 seconds', 'From $29/month') consistently achieve higher CTR than generic ads. Higher CTR improves Quality Score, which reduces CPC — which directly lowers CPA even at the same conversion rate.
Showing acquisition ads to existing customers wastes budget on people who've already converted. Upload your customer email list as a negative customer match audience in your acquisition campaigns. This is free, takes 10 minutes, and typically improves CPA by 5–15% by removing non-converting impressions.