How Much Does a Missed Window Lead Cost?

A window lead is unusually valuable because one inquiry can represent anything from a single opening to a whole-house project. That range is exactly why a missed window lead shouldn’t be assigned a made-up flat value.

Start with project mix — Suppose 50 percent of your sold projects are smaller jobs averaging $7,500, 35 percent are midsize projects averaging $16,000, and 15 percent are larger projects averaging $30,000. Your blended average sale isn’t a guess — it comes from that mix: (0.50 × $7,500) + (0.35 × $16,000) + (0.15 × $30,000) = $13,850.

At a 40 percent gross margin, each sale contributes about $5,540 in gross profit before overhead.

Then apply your real lead conversion — If 55 percent of qualified window leads book an appointment, 88 percent of those appointments run, and 32 percent of completed appointments sell, each qualified lead carries an expected gross profit value of roughly $858.

That number will be higher or lower for your own company — the point is that a lead has value before it becomes a sale, because it contains a measurable probability of becoming one.

Why window leads are easy to underestimate — A caller may say they only want two windows, and during the in-home inspection the actual project turns out larger. That doesn’t justify treating every lead like a guaranteed whole-house sale, but it does justify giving the first conversation enough attention to learn what’s really there.

Instead of asking what one missed window lead costs in theory, calculate what your own qualified lead is worth — then compare that against how many leads go unanswered each month.