Why there is no single answer
A £15 cost per lead might be excellent for a local trades business and completely unviable for a B2B software company with a six-month sales cycle. A £200 cost per lead might look expensive until you realise the average customer is worth £8,000.
The number that matters is not the cost per lead in isolation. It is the cost per lead relative to the value of a customer and the rate at which leads convert to paying customers. Those two things together tell you whether your Google Ads are profitable, not the CPL figure alone.
Start with your numbers, not industry averages
Before benchmarking against anything external, work out what a lead is actually worth to your business. This is simpler than it sounds.
- Average customer value. What does a typical customer spend with you over their lifetime, or at minimum over the first 12 months?
- Lead to customer conversion rate. What percentage of enquiries actually become paying customers? If you close 1 in 5, that's a 20% conversion rate.
- Maximum viable CPL. Multiply average customer value by your conversion rate. If the average customer is worth £2,000 and you close 1 in 4 leads, each lead is worth £500 to you. Spending £100 per lead is very profitable. Spending £400 per lead still makes money but leaves little room for error.
Once you have that number, you have a ceiling. Your target CPL should be comfortably below it, leaving enough margin for your other business costs.
The formula: Maximum CPL = Average customer value x Lead to customer conversion rate. If a customer is worth £3,000 and you convert 25% of leads, your maximum viable CPL is £750. Aim for well below that to leave margin.
Typical cost per lead ranges by sector
These are broad ranges based on typical UK Google Ads performance in 2026. They vary significantly based on location, competition, account quality and budget.
| Sector | Typical CPL range | Key variable |
|---|---|---|
| Local trades and home services | £15 to £60 | Location and service type |
| Legal services | £40 to £200 | Practice area and case type |
| Financial services | £50 to £250 | Product type and regulation |
| B2B professional services | £60 to £300 | Deal size and sales cycle |
| Healthcare and dental | £30 to £150 | Treatment type and location |
| Education and training | £20 to £100 | Course type and duration |
| Construction and property | £50 to £250 | Project size and geography |
| SaaS and technology | £80 to £400 | Product price point and ICP |
These ranges are wide for a reason. A solicitor handling personal injury claims will have a very different CPL to one handling conveyancing. A national construction firm has different economics to a local builder. Use them as a rough orientation, not a hard target.
What affects your cost per lead
Search intent
Keywords with strong buying intent cost more per click but tend to convert at a higher rate. "Emergency boiler repair London" will cost more per click than "how to fix a boiler" but the person clicking the first one is ready to hire someone now. The second might just be curious. Higher cost per click with better conversion rate often produces a lower cost per lead overall.
Competition in your market
The more advertisers bidding on the same keywords, the higher the cost per click. Legal, financial and insurance sectors are among the most expensive in Google Ads because the customer lifetime value justifies aggressive bidding. If you are in a competitive sector, a higher CPL is the starting point, not a failure.
Quality of your landing page
Two advertisers can spend the same amount per click and get completely different costs per lead if their landing pages perform differently. A page that converts 8% of visitors produces leads at half the cost of one that converts 4%, even with identical ad spend. Improving your landing page is one of the most direct ways to reduce cost per lead without changing your bids or budget.
Account structure and targeting
A well-structured account with tightly themed ad groups, relevant ads and a clean negative keyword list will consistently produce lower CPLs than a poorly structured one, even at the same budget level. Quality scores affect how much you pay per click, and better account structure leads to better quality scores.
Time of day and device
Most accounts see meaningful differences in conversion rate by time of day, day of week and device type. If mobile users convert at half the rate of desktop users for your particular business, running ads at full bid on mobile is raising your average CPL unnecessarily. Adjusting bids based on performance data is a straightforward way to bring CPL down.
When your CPL feels too high
If your cost per lead is higher than you'd like, the first thing to check is whether the leads themselves are good quality. A high volume of cheap leads that never convert to customers is worse than a smaller number of more expensive leads that do.
If lead quality is fine but CPL is too high, the most common causes are broad keyword targeting bringing in irrelevant traffic, a landing page with a low conversion rate, or a competitive market where the budget isn't quite large enough to be competitive in the best auction slots.
If lead quality is poor and CPL is high, that usually points to a keyword or targeting problem. The wrong people are clicking, and the right people either aren't seeing the ads or aren't clicking them.
CPL is not the only metric that matters
Cost per lead is useful but it doesn't tell the whole story. These metrics matter just as much.
- Lead to customer conversion rate. Are your leads actually turning into customers? If not, the problem might be in the sales process rather than the ads.
- Cost per acquisition. What does it cost to acquire a paying customer, not just a lead? This is the number that most directly relates to profitability.
- Lead quality score. If you can rate the quality of leads coming through, over time you can identify which keywords and campaigns produce the best quality enquiries and shift budget towards them.
- Return on ad spend. For businesses where the revenue from ads is trackable, ROAS gives a direct picture of whether the investment is paying off.
The bottom line
There is no universal answer to what a good cost per lead looks like. The right number for your business depends on what a customer is worth to you and how many leads convert to customers. Work those numbers out first, set a maximum CPL based on them and then focus on getting your account to perform within that ceiling.
If you are not sure whether your current CPL is reasonable for your market or if there is room to improve it, a proper audit of your account will tell you. It will identify where spend is going and whether the account structure, keywords and landing pages are set up to produce the best possible cost per lead for your budget, the kind of detail a contract Google Ads specialist would dig into as standard.