Home & Garden E-commerce: ROAS Lifted from 5.2x to 8.3x

A professional-tier e-commerce account in the Home & Garden vertical operating at an $8,000 monthly Google Ads budget reduced cost-per-acquisition by 34.68% (from $83.68 to $54.66) and lifted ROAS by 60.66% (from 5.16x to 8.29x) over a 90-day optimization window, while growing conversion value from $141,215 to $242,566 (+71.7%).

Key Takeaways

• ROAS lifted from 5.16x to 8.29x, moving decisively above the 4.0x stated target.
• Conversion value grew +71.7% — the dollar figure that matters most for a high-value vertical.
• Conversions grew 63.7% while spend grew only 6.9%.
• CTR remained in the 16-18% range, indicating that this account operates in a niche where Shopping or branded traffic dominates (unusually high for Home & Garden).

The Account

A professional-tier e-commerce retailer in the Home & Garden vertical selling higher-value items nationally. Monthly budget around $8,000, with a target ROAS of 4.0x. The account’s unusually high CTR (16%+) suggests a combination of strong brand recognition and tight keyword targeting.

The Challenge

Metric	Baseline (90 days)
Spend	$27,362.71
Conversions	326.99
Conversion Value	$141,214.78
CPA	$83.68
ROAS	5.16x
CTR	18.09%

ROAS at 5.16x was already 29% above the 4.0x target, so the account was not distressed. The optimization goal was to push efficiency further while preserving the baseline.

The Approach

Step 1: Selective search-terms audit. With a high-CTR account, the volume of flagged terms is typically lower than in broader accounts, so the audit focused on precision rather than volume.

Step 2: Asset group expansion in Performance Max. The team added signal to the working asset groups and refined creative themes.

Step 3: Negative keyword work on specific campaigns. 10 flagged terms across 6 campaigns in a single review session demonstrates the spread-thin pattern typical of a well-structured account.

Step 4: Controlled scale-up. Spend grew only 7% — a deliberately small increase to test whether the algorithm could absorb additional volume at target.

The Results

Over the 90-day optimization window (September 16 to December 14, 2025):

Metric	Before (90 days)	After (90 days)	Change
Spend	$27,362.71	$29,259.78	+6.9%
Conversions	326.99	535.33	+63.7%
Conversion Value	$141,214.78	$242,565.59	+71.7%
CPA	$83.68	$54.66	-34.7%
ROAS	5.16x	8.29x	+60.7%
CTR	18.09%	16.52%	-8.7%

Conversion value growing 71.7% on a 6.9% spend increase represents a massive expansion in the revenue productivity of every budget dollar. The slight CTR decline (from an already-high base) is expected as the account expands into slightly broader query territory.

Lessons Learned

1. High-CTR accounts reward precision over breadth. With 18% CTR, every new impression is expensive in terms of the risk of diluting the auction mix. Expansion should be careful and tested.

2. Conversion value is the real metric for high-value verticals. In Home & Garden, a single high-value order can matter more than ten low-value ones. The reporting should reflect this.

3. Going 2x above target is not overkill. 8.29x vs. a 4.0x target gives the business real margin to reinvest in growth. Operating with this kind of headroom is the correct posture for a healthy account.

4. Small spend increases test big efficiency gains. The 7% spend increase was enough to confirm that the efficiency improvements would hold at higher volume, without risking the baseline.

Methodology Note

Data sourced from a managed Google Ads account in the Home & Garden vertical operating at the professional budget tier. All identifying information has been removed. Performance metrics reflect the best 90-day window (September 16 to December 14, 2025) compared against the prior 90-day baseline (June 17 to September 15, 2025). The account executed 83 documented optimization actions during the measurement period. Metrics reported in USD.