The Google Ads bidding strategy that works best for a B2B SaaS account is the one that matches its conversion data. Use Maximize Conversions while a campaign builds volume, Target CPA once it clears roughly 30–50 conversions a month at similar values, and Maximize Conversion Value with a Target ROAS once you import pipeline stages with different values. The choice of strategy matters less than what you tell it to optimise toward. Bid to SQLs or pipeline value, because a perfectly tuned Target CPA on form fills will still buy you the cheapest leads, not the best ones.
Every Google Ads bidding strategy, in B2B SaaS terms
| Strategy | Optimises for | Use in B2B SaaS when | Watch out for |
|---|---|---|---|
| Manual CPC | Your bid per keyword | No conversion tracking yet, or tiny-volume niche terms | Can't use auction-time signals; doesn't scale |
| Maximize Clicks | Most clicks within budget | Briefly, to gather search-term data on a new campaign (with a max CPC limit) | Buys the cheapest clicks, which in SaaS are rarely buyers |
| Maximize Conversions | Most conversions within budget | Campaigns building toward steady volume | Spends the full budget; optimises to whatever counts as a conversion |
| Target CPA | Conversions at or below a set cost | ~30–50+ conversions/month per campaign, similar values | Targets set from wishes throttle volume; thin data makes it erratic |
| Maximize Conversion Value | Most total conversion value within budget | Pipeline stages imported with different values (SMB vs mid-market) | Behaves like Maximize Conversions if values are flat or missing |
| Target ROAS | Conversion value at or above a set return | After 4–6 weeks on Maximize Conversion Value | An aspirational target stops spend |
| Target Impression Share | Showing at a chosen position/share | Brand defence only, with a max CPC limit | On non-brand terms, pays for visibility, not outcomes |
Enhanced CPC no longer appears here because Google retired it for Search and Display campaigns; anything still showing it has moved to Manual CPC.
Which strategy to use at each stage
- Tracking just set up, no history. Maximize Conversions on a campaign that combines your highest-intent terms, so conversions accumulate in one place. Avoid splitting into many small campaigns that each have too little data.
- Steady volume, similar deal sizes. Target CPA, with the first target set near what the campaign already achieves. The number that should eventually go in comes from your unit economics: see how to adjust Target CPA for B2B SaaS.
- Pipeline stages imported from the CRM. Once SQLs, opportunities and closed-won deals flow back with values, move to Maximize Conversion Value. The decision and migration path are in Maximize Conversion Value vs Target CPA.
- Four to six weeks later. Add a Target ROAS slightly above the return the strategy has actually delivered, then move it gradually.
If campaigns sit below 30 conversions a month, a portfolio bid strategy shared across several campaigns pools their data, and importing an earlier funnel stage as a secondary signal helps. The options are in Google Ads on thin data and the 50-conversion learning problem.
What you optimise toward matters more than the strategy
Every Smart Bidding strategy maximises the conversion you mark as primary. In most SaaS accounts that is a demo request or trial signup, which treats a student and a VP of Sales at a 500-person company as the same result. Three changes do more than any switch of strategy:
- Make the deepest reliable stage primary (SQL or opportunity) once it has enough volume, and keep form fills as secondary.
- Give stages values based on close rate × ACV, so the algorithm can tell a mid-market SQL from an SMB trial (see the conversion value ladder).
- Count one conversion per click for lead actions, so a buyer who submits two forms isn't counted twice.
On profit-based bidding: Google's profit optimisation is a retail feature built on cost-of-goods data from Merchant Center. The SaaS equivalent is value-based bidding on pipeline or margin-adjusted lifetime value, which is what the steps above set up.
Bidding mistakes that cost funded SaaS teams the most
| Mistake | What happens | Fix |
|---|---|---|
| Target CPA set to the cost the board would like | Spend stalls; the campaign only enters the cheapest auctions | Start at the achieved CPA and step down gradually |
| Big target or budget changes at once | Bidding re-learns and performance swings for weeks | Change in steps of roughly 15–20% with time between |
| Many small campaigns, each on its own target | None has enough data to bid well | Consolidate, or use a portfolio strategy |
| Bidding to form fills after a budget increase | Lead volume rises, SQL rate falls | Import pipeline stages and bid to them before scaling |
If spend is about to go up, read how to scale Google Ads for a funded SaaS before changing the bid strategy.
Next step
A B2B SaaS Google Ads audit checks each campaign's bid strategy against its conversion volume and what it is optimising toward. To check the basics yourself first, run the free 10-point Google Ads audit.