- Cost per lead
- An operational starting point, always to be read together with quality.
- Qualified-lead rate
- Separates volume from requests that meet the commercial criteria.
- Contact rate
- Measures real reachability and the effectiveness of the callback process.
- Duplicate or invalid lead rate
- Corrects volumes and exposes problematic traffic sources.
- Appointment rate
- A strong intent signal, far more predictive than the form.
- Opportunity rate
- Shows how many enquiries become deals with an expected value.
- Proposal rate
- Isolates qualification problems from closing problems.
- Lead-to-sale conversion
- Closes the chain and makes sources and campaigns comparable.
- Customer acquisition cost
- The economic reference metric, not cost per lead.
- Revenue and margin by source
- Shows where budget produces revenue and where it produces activity.
- Value by service
- Different services deserve different cost targets.
- Response time
- A process variable with direct impact on contact and closing rates.
- Sales cycle duration
- Defines how long to wait before judging a campaign.
- Customer lifetime value
- Where the service recurs, it completely changes the investment threshold.
- Profit ROAS
- Brings the comparison between channels back to margin instead of gross revenue.