Every business owner running Google Ads eventually asks this. It’s the wrong question — but here’s how to get to the right one.
There is no universal ‘good’ cost per lead. I know that’s not the answer you want. But after 8 years and $11 million in managed ad spend, I’ve watched businesses obsess over a number that means almost nothing in isolation — while ignoring the calculation that actually determines whether their advertising is working.
Here’s how to figure out your actual CPL target.
Why ‘Average Cost Per Lead by Industry’ Doesn’t Help You
Google ‘average cost per lead’ and you’ll find benchmarks ranging from $20 to $500 depending on industry. These numbers are real. They’re also useless for making decisions about your specific business.
A $50 cost per lead could be catastrophically expensive for one business and wildly profitable for another. It depends entirely on what happens after the lead comes in — your close rate, your average deal size, your customer lifetime value.
An industry benchmark tells you what other businesses are paying. It tells you nothing about whether that number works for your economics.
How to Calculate Your Maximum Cost Per Lead
Step 1: Find your customer lifetime value. How much does an average customer spend with you over the entire relationship? Not just the first transaction — everything.
Step 2: Calculate your max customer acquisition cost. Divide your LTV by three. That’s the most you should spend to acquire a customer, all in — ad spend, agency fees, sales time, everything. This is a rough heuristic, not a law, but it’s a useful starting point.
Step 3: Factor in your close rate. If you close 25% of leads, you need 4 leads to get one customer. Divide your max CAC by 4. That’s your maximum CPL.
Example:
- LTV: $3,000
- Max CAC (LTV ÷ 3): $1,000
- Close rate: 25%
- Max CPL: $250
Now $250 per lead isn’t a benchmark you found on a blog. It’s a number tied directly to your business economics.
What If the Math Says My CPL Target Is Too Low?
I had a client last year whose math came out to a maximum CPL of $8. Their actual cost per lead was $65.
The instinct was to fire the agency. The real problem was that their average customer was worth $180 in lifetime value. No amount of optimization was going to bridge that gap.
If your CPL target comes out extremely low, you don’t have an advertising problem. You have a business model problem. The lever is LTV — charge more, increase retention, add recurring revenue, upsell existing customers. When LTV goes up, your max CPL goes up with it.
What Actually Determines Whether Your CPL Is ‘Good’
A good CPL is one that produces customers at a cost below your max CAC target.
That’s it. It has nothing to do with what other businesses in your industry are paying. Two businesses in the same industry with the same CPL can have completely opposite results — one profitable, one hemorrhaging money — based purely on differences in close rate and customer lifetime value.
Stop benchmarking against the industry. Benchmark against your own economics.