How to Set Google Ads Target ROAS from Your Margin
Target ROAS (tROAS) tells Google Smart Bidding the efficiency floor you need. Set it from break-even economics — margin, AOV, and fixed costs — not from a competitor benchmark.
What target ROAS does in Google Ads
Target ROAS bidding optimizes for conversion value relative to spend. Google uses your target as a signal — campaigns may fluctuate above or below it as the algorithm learns. Your break-even ROAS is the minimum target that keeps campaigns profitable after costs Google does not see.
Calculate break-even ROAS before opening Google Ads
- Find gross margin from Shopify, your P&L, or COGS spreadsheet
- Subtract per-order fixed costs (shipping, payment fees, packaging)
- Divide AOV by contribution per order
- Add profit headroom if you want margin above break-even
Detailed platform walkthrough: Google Ads Break-even ROAS.
Common tROAS mistakes
- Using revenue ROAS from Google as if it included COGS
- Copying a competitor's 400% target without matching margin
- Setting tROAS below break-even to get more volume
- Ignoring conversion value rules — ensure value reflects AOV accurately
Frequently asked questions
- What target ROAS should I use in Google Ads?
- Start at or above your break-even ROAS calculated from margin and AOV. Add headroom for profit goals. Do not use generic 400% unless your economics support it.
- Where do I find margin for tROAS?
- Shopify gross profit reports, accounting P&L, or COGS divided by revenue. Use true gross margin before ad spend, not net profit.
- Can tROAS be lower than break-even ROAS?
- You can set it lower, but the campaign will lose money after product costs. Lower tROAS may increase volume at the expense of profitability.