Module 1: Lead Generation Economics & Commercial Targets
Lesson 3 · Lead Generation Economics & Commercial Targets
Lesson 3 objective
Understand the economics at each stage between a Google Ads enquiry and a paying customer, and diagnose exactly where value is being lost.
A raw lead is only one stage in a commercial funnel.
The economics of Google Ads can change dramatically as that lead progresses — or fails to progress — towards revenue.
Lead
Qualified
Opportunity
Customer
Contribution
The point where volume collapses is often more important than the CPL Google Ads reports.
1. Qualification rate
Qualification rate asks:
Of all the enquiries generated, how many are genuinely worth pursuing?
A lead might qualify according to need, budget, geography, timing, authority or another condition specific to the business.
Need
Does the prospect genuinely require the product or service?
Budget
Can the prospect realistically afford the commercial solution?
Location
Can the business actually serve the prospect?
Authority
Is the enquiry coming from someone capable of influencing or making the purchase?
The exact definition differs by business. What matters is that qualification has commercial meaning.
2. Cost per qualified lead
Suppose Google Ads generates 100 raw leads from £5,000 of spend.
Raw CPL = £50.
If only 25 leads qualify:
Cost per qualified lead = £5,000 ÷ 25 = £200.
The £200 figure may be far more useful than the £50 shown in a surface-level report.
3. Opportunity rate
Not every qualified lead becomes a genuine sales opportunity.
A prospect may appear suitable initially but fail to progress because of timing, price, procurement requirements, internal priorities or further qualification.
Tracking progression from qualified lead to opportunity tells you whether apparent lead quality survives deeper commercial scrutiny.
4. Close rate connects acquisition to revenue
Consider this funnel:
| Stage | Volume | Conversion from previous stage |
|---|---|---|
| Raw leads | 200 | — |
| Qualified leads | 80 | 40% |
| Opportunities | 40 | 50% |
| Customers | 12 | 30% |
Overall raw lead-to-customer conversion is:
12 ÷ 200 = 6%
If media spend was £12,000:
Raw CPL = £60
Cost per qualified lead = £150
Customer acquisition cost = £1,000
5. Diagnose the stage that changed
If CAC deteriorates, the media team should not immediately assume Google Ads is the problem.
| Observed change | Possible interpretation |
|---|---|
| CPL rises, qualification remains stable | Media acquisition has become more expensive. |
| CPL stable, qualification falls | The traffic mix may be moving towards weaker prospects. |
| Qualification stable, opportunity rate falls | Initial qualification may be too loose or prospect fit may have changed. |
| Opportunity rate stable, close rate falls | Sales execution, proposition, pricing or competition may be the constraint. |
Without stage-level visibility, all four can be misdiagnosed as:
“Google Ads performance got worse.”
6. Campaign comparisons become more useful downstream
| Campaign A | Campaign B | |
|---|---|---|
| Raw CPL | £40 | £70 |
| Qualification rate | 18% | 55% |
| Qualified lead → customer | 15% | 25% |
Campaign A looks stronger if the analysis stops at CPL.
Campaign B may be dramatically more valuable once qualification and customer conversion are included.
7. Funnel leakage compounds
A small deterioration at several stages can create a large deterioration in final CAC.
Suppose:
50% qualify × 40% become opportunities × 30% close = 6% lead-to-customer conversion.
If those rates decline to:
40% × 30% × 25% = 3%.
The overall lead-to-customer rate has halved, even though no single stage appears catastrophic.
8. The lead funnel is a shared system
Google Ads influences who enters the funnel.
Landing pages influence expectation and self-qualification.
CRM processes influence visibility.
Sales teams influence progression and close rate.
The strategist therefore needs to understand the whole system rather than defending the media account in isolation.
Interactive diagnosis
Month 1: 100 leads → 40 qualified → 20 opportunities → 8 customers.
Month 2: 100 leads → 40 qualified → 20 opportunities → 4 customers.
CPL is unchanged.
Practical challenge
Map your real lead funnel and calculate:
Raw CPL · Qualification rate · Cost per qualified lead · Opportunity rate · Close rate · CAC
Then identify the single stage where improving performance would currently have the greatest economic impact.
Knowledge check
1. A campaign spends £8,000, produces 100 leads and 25 qualified leads. What is the cost per qualified lead?
2. CPL and qualification rate remain stable, but opportunity-to-customer close rate falls sharply. What is the strongest initial interpretation?
3. Why is cost per qualified lead often more useful than raw CPL?
4. Qualification falls from 50% to 40%, opportunity rate from 40% to 30%, and close rate from 30% to 25%. What is the strongest conclusion?
Key takeaway
Do not stop at the lead. Follow performance through qualification, opportunity and customer acquisition. The stage where value disappears tells you what actually needs fixing.