Short answer
Compare campaigns using cost per new qualified lead under the same definition, then connect leads with sales and margin. Cheap calls do not ensure profitability; revenue and margin should be shown separately with explicit assumptions.
Key verification: Reproduce the calculation using unique leads, confirmed sales and comparable costs.
Sources and limitationsTo compare phone campaigns, divide spend by new qualified leads using a common definition of “qualified”. Then relate that cost to sales and margin. A channel generating cheaper calls can be less profitable if it produces few customers or services with lower margins.
The denominator determines what you are measuring
Count people or commercial needs according to your rule, rather than treating every follow-up call as a new acquisition. Define fit, minimum information and the reviewer. Keep answered calls, unique leads, qualified leads and closed deals separate.
WhatConverts documents channel reports with qualification metrics, quote and sales values, spend and cost per lead. CallRail also presents reports relating leads to advertising spend. The formulas below are our own analysis, not results obtained in those tools.Marketing channels report and CallRail reports.
A complete example of two campaigns
| Fictional data | Campaign A | Campaign B |
|---|---|---|
| Advertising spend | €1,000 | €800 |
| New leads | 50 | 20 |
| Qualified leads | 10 | 10 |
| Closed sales | 2 | 4 |
| Revenue recognised in the example | €1,200 | €2,400 |
| Contribution margin before advertising | €600 | €1,200 |
A has a raw CPL of €20; B, €40. However, cost per qualified lead is €100 for A and €80 for B. Advertising cost per sale is €500 and €200 respectively. These differences change the decision you would make from calls or leads alone.
Revenue is not profit
In the example, revenue divided by advertising spend gives a ROAS of 1.2 for A and 3 for B. Subtracting advertising from contribution margin leaves −€400 and +€400, before other costs not included. Do not call that difference net profit: costs absent from the model are still missing.
Coste por cualificado = gasto atribuible / contactos nuevos cualificados
Coste publicitario por venta = gasto publicitario / ventas atribuidas
ROAS = ingresos atribuidos / gasto publicitario
Contribución después de publicidad = margen de contribución - gasto publicitarioThe formula block retains its original Spanish labels. In English: cost per qualified lead equals attributable spend divided by new qualified leads; advertising cost per sale equals advertising spend divided by attributed sales; ROAS equals attributed revenue divided by advertising spend; contribution after advertising equals contribution margin minus advertising spend. If phone systems, agency fees or tools are included in the numerator, label the result total cost and apply the same scope to both channels. A zero denominator means no basis for calculation, not zero cost.
Comparison process
- Choose a period and a common attribution rule.
- Remove identified tests and separate follow-ups from new acquisitions.
- Validate qualification and sales using the agreed criteria.
- Import or record spend for the same period and scope.
- Calculate ratios and show counts beside them.
- Review margin, closing delays and small samples before changing investment.
Ten qualified leads provide a limited signal; a difference of two sales can reflect individual cases. The analysis needs mature periods and commercial review, rather than only a ranked table.
Tools and coverage
If you outsource campaign execution, Brandify presents itself as an advertising and AI visibility agency. It describes measuring qualified leads when qualification data is connected, and sales when tracking and commercial data permit. Source: Brandify services and measurement (consulted on 3 October 2026).
Before purchasing, request a quote separating media spend, management, tools and production. Confirm support for your market and language, the qualification definition and data access. Apply this guide’s calculation to an agreed sample; do not assume hiring the agency reduces costs or guarantees sales. CallsIQ has not tested its service. For its organic visibility proposal, see theAEO/GEO evaluation guide.
WhatConverts can help examine qualification and value alongside source. CallRail is an alternative for operations in supported markets; Spain is absent from its published phone-number list. Confirm fit before purchasing. Official CallRail coverage.
This calculation evaluates acquisition by channel. Thesales-team dashboard examines individual activity and processes and cannot substitute for marketing profitability analysis.
Sources and limitations
Documentary review: . Content type: Documentation-based guide.
Sources describe terms and capabilities stated by their owners. Proposed protocols and fictional examples do not establish product tests performed by CallsIQ.
- Marketing channels reportwww.whatconverts.com
- CallRail reportswww.callrail.com
- Source: Brandify services and measurementbrandify.io
- Official CallRail coveragewww.callrail.com
Check current terms
Consider these options if they solve the problem described. Confirm features, limits and availability in your country.
CallRail for international clients: its phone-number documentation lists availability in the United States, Canada, the United Kingdom and Australia. Spain is not on that list. Consider this option if you manage phone operations in those markets, and confirm numbers, destinations and terms with the provider. Availability checked on 2 October 2026.
WhatConvertsAffiliate linkCallRailAffiliate linkBrandifyAffiliate linkThe labelled commercial links may earn CallsIQ a commission or referral reward. Our commercial policy.
Official sources, explained calculations and clearly labelled examples. Read about our methodology and use of AI in writing.