What Is a Lead Actually Worth to Your Business?

Most businesses we meet measure marketing by how busy it makes them feel, not by what it returns. That is understandable, but it leads to two expensive mistakes: underspending on things that work because they look pricey, and overspending on things that look cheap but never close. A simple per-lead value fixes both.

Once you know roughly what a customer is worth, you can set a ceiling on what you are willing to pay to win one and still profit. Everything else, the channel, the agency, the ad budget, becomes a comparison against that ceiling rather than a leap of faith.

Let us run round numbers to show the method. These are illustrative figures to demonstrate the maths, not a client result.

Say your website gets 1,000 visitors in a month. At an average website conversion rate of around 5.1% (Ruler Analytics, 2026), that is roughly 50 enquiries. Now apply your close rate. If your team wins 4 in every 10 genuine enquiries, that is 20 new customers. At an average job value of £1,500, those 20 jobs are worth £30,000 in revenue for the month.

Now you can value a lead. £30,000 of revenue from 50 enquiries means each enquiry is worth about £600 in revenue on average, and each won customer is worth £1,500 before you count any repeat work or referrals. That single figure changes every decision that follows. If a lead is worth £600 in revenue, paying £40 or £80 to generate one is plainly sensible. Paying nothing and getting no leads is the expensive option.

The example above only counts the first job. For most trades and local businesses, a happy customer is worth far more than one transaction. They book you again, they recommend you to neighbours, and they leave the reviews that win the next enquiry for free.

If your average customer comes back once and refers one other paying customer over a few years, the true lifetime value can be two or three times that first job. We are not putting a fixed figure on that here because it varies by trade, but it matters: the more a customer is worth over time, the more you can comfortably invest to win them in the first place, and the faster good marketing pays for itself.

Return on investment is simply revenue out divided by spend in. The reason the maths above matters is that it lets you forecast ROI before you commit, instead of hoping for it afterwards. If you know a lead is worth roughly £600 and a channel reliably brings them in at £80, the return speaks for itself.

Different channels convert at different rates, which affects the cost. Across channels, average conversion rates sit at about 5.4% for paid search, 4.9% for email and 4.9% for organic search (Ruler Analytics, 2026). Email in particular tends to punch above its weight on return; UK marketers reported an average of £42 back for every £1 spent on email marketing (DMA UK, Marketer Email Tracker, 2019). The point is not to chase one channel, it is to measure each one against the per-lead value you have already worked out.