How much is a lead worth to a service business?

Before you can say whether $50 or $500 per lead is “expensive,” you need to know what a lead is worth to you. That number comes from four inputs you already have or can measure: what a job pays, what it costs to deliver, how many leads become jobs, and how often customers come back. This guide gives the formulas, then works through three businesses.

Two of these change by channel. Many operators find booking and close rates on shared leads, where several companies call the same person, run lower than on calls that came to them alone. Angi, for example, matches each request with up to five pros⁷.

The “share of gross profit you will spend” is a business choice. A common rule of thumb is to keep acquisition cost to a fraction of first-job gross profit, often somewhere between 20% and 40%, so the rest covers overhead and profit. Pick a number that fits your margins and cash.

Inputs. Where a number is sourced, the source is shown. The rest are illustrative.

The math:

1. Gross profit per job: $1,714 × 0.50 = $857.
2. Lead-to-job rate: 0.445 × 0.85 = 37.8%.
3. Lead value, first job: 0.378 × $857 = about $324. That is the break-even cost per lead.
4. Maximum affordable CPL at 30% of gross profit: $324 × 0.30 = about $97.
5. Lifetime gross profit per customer: $857 × 1.5 = $1,285.50. Lifetime lead value: 0.378 × $1,285.50 = about $486.
6. Cost per paid job at a $57 CPL: $57 ÷ 0.378 = about $151, or 18% of first-job gross profit.

At these inputs a $57 lead is well within budget, and the company could pay up to about $97 and stay inside its 30% rule. The weak point is the 85% assumption. If the team answers late and only half of booked calls turn into paid work, the lead-to-job rate drops to 22% and cost per paid job rises to about $256.

Roofing has big tickets and long sales cycles, so lead value is high but very sensitive to close rate.

The math:

1. Gross profit per job: $31,871 × 0.30 = $9,561.
2. Lead-to-job rate: 0.50 × 0.25 = 12.5%.
3. Lead value, first job: 0.125 × $9,561 = about $1,195.
4. Maximum affordable CPL at 20% of gross profit: $1,195 × 0.20 = about $239.
5. Cost per signed job at $228.15 per lead: $228.15 ÷ 0.125 = about $1,825, which is 19% of gross profit.

The benchmark CPL sits just under this roofer’s ceiling. Now change one input. Suppose shared leads cost $80 but four other roofers chase each one, and only 6% become signed jobs. Cost per signed job is $80 ÷ 0.06 = about $1,333. That is cheaper than search ads in this example, but only if the 6% holds. Many roofers also do repairs worth a small fraction of a replacement. Mixing those into one average job value will overstate what a lead is worth, so calculate repair and replacement leads separately.

Repeat work matters less here because roofs last years. Referrals from finished jobs matter more, so count them as a separate source rather than adding them to lead value.

Health practices should not pay marketers per patient, per new client or per referral. The federal Anti-Kickback Statute makes it a felony to knowingly and willfully pay anyone to induce referrals for services paid by a federal health care program⁵. For substance use treatment facilities, recovery homes and labs, a separate federal law, EKRA, covers payments to induce referrals for services covered by any health care benefit program, which federal law defines to include private plans as well as public ones⁶⁸. Many states add their own rules. For these reasons, practices commonly buy marketing on a flat fee that does not change with the number of patients. Talk to a healthcare attorney before signing any marketing contract.

That changes the math. Instead of asking “what is my maximum cost per lead,” the practice asks “how many new clients does a flat monthly spend need to produce to pay back?”

The math:

1. Total monthly spend: $1,500 + (4 × $29.95) = $1,619.80.
2. New clients: 40 × 0.30 = 12.
3. Cost per new client: $1,619.80 ÷ 12 = about $135.
4. Gross profit per session: $150 × 0.45 = $67.50. Per client over 12 sessions: $810.
5. Payback: monthly gross profit per client is 4 × $67.50 = $270, so $135 ÷ $270 = half a month.
6. Break-even: the spend pays back on first-course gross profit once the practice adds $1,619.80 ÷ $810 = 2 new clients a month.

The binding constraint for most practices is not marketing cost. It is open clinician hours. Twelve new clients at four sessions a month need 48 open session slots. If the practice cannot see them, extra inquiries only raise cost per client. Note also that this practice pays the same fee whether it gets 2 or 20 new clients, which is the point of a flat-fee structure.

• Using revenue instead of gross profit. At a 40% gross margin, valuing leads on revenue overstates them by 2.5 times (1 ÷ 0.40).
• Using one close rate for every channel. Branded searches, referrals and shared marketplace leads close at very different rates.
• Counting lifetime value you cannot prove. Use repeat rates from your own records, or leave them out of the bid ceiling.
• Blending small and large jobs. A drain clearing and a repipe are different products with different lead values.
• Ignoring capacity. Leads you cannot serve in time have no value and can damage reviews.
• Judging a channel in its first month. Wait for 90 days of tagged leads and outcomes.

1. Calculate first-job lead value for each main job type.
2. Set a maximum CPL per channel from that number and your target share of gross profit.
3. Track cost per paid job by source every month.
4. Raise spend on sources under your ceiling. Fix answering, follow-up or targeting on sources above it before cutting them.
5. Recalculate every quarter, or when prices, wages or materials change.

• Lead value = lead-to-job rate × gross profit per job. Use gross profit, not revenue.
• In the plumbing example, a lead is worth about $324 on the first job, and a $57 lead costs about $151 per paid job¹.
• Roofing lead value is high but swings with close rate, so value repair and replacement leads separately²³.
• Health practices should use flat-fee marketing, not per-patient pricing, and get legal advice first⁵⁶.
• Set a maximum cost per lead from your own numbers, then judge every channel by cost per paid job.