Definition
Target ROAS (tROAS) is a Google Ads bidding strategy that tells Google how much revenue you want to generate for every dollar spent. For example, a 500% ROAS target means generating $5 in revenue for every $1 spent. Google adjusts bids based on the expected value of each conversion.
Formula: tROAS = (Conversion Value / Ad Spend) × 100
If you spend $10,000 and generate $50,000 in conversion value, your ROAS is 500%. A tROAS setting of 500% tells Google to hit that ratio on average across the campaign.
Why Most B2B SaaS Accounts Run tROAS Wrong
tROAS only works when Google Ads knows how much each conversion is worth. Most B2B SaaS accounts don't send conversion values to Google, so the algorithm can't tell which conversions are more valuable.
If you set tROAS on a campaign where the only conversion action is "Demo Booked" with no value assigned, the algorithm has nothing to optimize against. It defaults to treating every demo as worth $1 (or $0), which makes the entire strategy meaningless. Smart Bidding still runs. It just runs blind.
This is why tROAS underperforms in most B2B SaaS accounts. The setting is applied without the data structure required for it to work.
How to Assign Pipeline Value to a Demo
The fix is value-mapping every conversion action to a monetary number based on your funnel. Here's how it works for a typical B2B SaaS setup:
Step 1: Know your funnel conversion rates.
- Demo booked to SQL: 50%
- SQL to Opportunity: 40%
- Opportunity to Closed-Won: 25%
- ACV: $30,000
Step 2: Calculate expected value per demo.
Expected Value = ACV × (Demo-to-SQL rate) × (SQL-to-Opp rate) × (Opp-to-Close rate) Expected Value = $30,000 × 0.50 × 0.40 × 0.25 = $1,500 per demo
Step 3: Assign that value in Google Ads.
Set "Demo Booked" as a conversion action with a value of $1,500. Now Smart Bidding knows each demo is worth $1,500 on average, and it can optimize toward the clicks most likely to produce them.
Step 4: Layer in downstream values as data flows back.
Through offline conversion tracking, assign real values to SQLs ($3,000), Opportunities ($7,500), and Closed-Won deals ($30,000). Now the algorithm optimizes against the full pipeline, not just the top.
Without conversion values, tROAS has very little to work with. With it, tROAS becomes the most powerful bidding strategy Google offers for B2B SaaS.
When to Actually Use tROAS
tROAS makes sense only under the following conditions:
- Offline conversion tracking is live and passing real values back
- The account has 60+ valued conversions per month
- Conversion values reflect actual pipeline economics
If any condition is missing, stay on Target CPA. Force-applying tROAS to an underdeveloped account produces worse performance, not better.
For the broader context on how first-party data feeds Smart Bidding, our guide on first-party data in Google Ads for B2B SaaS covers the setup, and our Google Ads attribution for B2B SaaS piece covers the measurement layer that makes tROAS work.
The Rule for tROAS in B2B SaaS
Value-map your conversion actions from MQL through Closed-Won before turning on tROAS.
Any Google Ads agency that skips this step is running tROAS in name only.
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