Google Ads for SaaS: Is It Worth It? A Founder's Honest Guide

You've probably thought about running Google Ads. Maybe you tried, burned some cash, and gave up. Or maybe you've been putting it off because you're not sure it's worth it for SaaS.

Fair question. Here's an honest answer.

What Google Ads does (and doesn't do)

Google Ads captures demand. Someone types "CRM for real estate teams" and your ad shows up. That person is already looking for what you sell. That's the power.

It doesn't create demand out of thin air. If nobody's searching for your category yet, Google Ads won't help. LinkedIn or content might be a better starting point.

But if people are searching for solutions like yours (and in most SaaS categories, they are), Google Ads puts you in front of them at the exact right moment.

What it actually costs

Real numbers. The average cost per click for B2B SaaS keywords sits between €2 and €8. Some competitive categories go higher.

If you need 50 clicks to get one demo request, and your CPC is €5, that's €250 per demo. If 20% of demos close, that's €1,250 per customer. Is that worth it? Depends on your contract value. If your average deal is €10K+ per year, absolutely. If you're selling a €9/month tool, probably not through Google Ads alone. You'd need a very efficient funnel.

The rule of thumb: Google Ads makes sense when your customer lifetime value is at least 3× your cost to acquire them.

When to start (and when to wait)

Start when you have product-market fit. You've got 15–20 happy customers, you know who your ideal buyer is, and your website can convert a visitor into a demo or trial.

Don't start if you're still figuring out your product, your pricing, or your target market. Google Ads amplifies what's already working. It doesn't fix a broken funnel or a product people don't want yet.

One more thing: have at least €2–3K per month to dedicate to ads alone (not counting agency fees). Less than that and you won't get enough data to learn what works.

The biggest mistake founders make

They judge Google Ads by the wrong metric. You look at cost per click, maybe cost per lead. But what you should care about is cost per customer.

A lead is someone who filled a form. A customer is someone who pays you. These are very different things.

Most SaaS companies running Google Ads have no idea which clicks actually turn into revenue. They see 100 leads and think it's working, while their sales team says 90 of those leads are garbage. The fix isn't complicated: connect your sales data back to Google Ads so the algorithm learns what a real customer looks like. But most teams never set this up.

How to know if your Google Ads are actually working

Forget impressions. Forget click-through rate. The only numbers that matter are: how many qualified leads did ads generate this month? What did each one cost? How many became customers? What revenue did that produce?

If your agency or whoever manages your ads can't answer these questions, you have a reporting problem before you have an ads problem.

The bottom line

Google Ads works for SaaS when the economics make sense and the tracking is right. It's not magic, and it's not a scam. It's a channel that captures people already looking for what you sell. The question isn't whether it works. It's whether your setup lets it work.