What is a good cost per lead?

The calculation

Step 1: average customer value. Use lifetime value, not first purchase, if customers come back. A business with strong repeat purchase can afford to lose money on the first sale.

Step 2: lead-to-customer rate. Of every ten enquiries, how many become paying customers? Most businesses overestimate this. Check it against actual records rather than instinct.

Step 3: multiply. Customer value × conversion rate = maximum profitable cost per lead.

Step 4: set a target. Work to a fraction of that maximum so there is margin for delivery costs and profit. Many businesses target around a third.

Why cheaper leads are often worse

Cost per lead is the easiest metric to improve and the easiest to game. Broaden your targeting, weaken your form, drop the qualifying questions, and cost per lead falls immediately. So does lead quality.

We have seen accounts halve their cost per lead and lose revenue, because the cheaper leads were out of area, out of budget, or looking for a service the business does not offer. If you optimise a campaign on cost per lead alone, it will drift towards the cheapest enquiries available.

The metric that avoids this is cost per acquired customer, or cost per qualified lead if your sales cycle is too long for that.

What actually moves it

Landing page conversion rate. Usually the biggest and cheapest lever. Doubling conversion rate halves cost per lead with no change in ad spend.

Targeting precision. Tighter keywords and match types cost more per click and usually less per lead.

Offer. "Free quote" converts worse than something specific and valuable. What you ask for in exchange matters as much as the ad.

Follow-up speed. Not a campaign metric, but it decides whether leads become customers — which is what you are actually paying for.

Tracking it properly

You cannot manage this without conversion tracking that reflects reality. That means Google Analytics 4 and conversion tracking configured correctly, call tracking if leads arrive by phone, and ideally offline conversion imports so closed sales feed back into the platform.

Without call tracking, a trades or automotive business is typically blind to the majority of its conversions. Set that up before drawing conclusions about which campaigns work.