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How to measure clinic marketing ROI without confusing revenue with profit
By ClinicGrower · Updated · Guidance for clinic owners and their teams
In this guide
Start with three different measures
| Measure | Calculation | What it tells you |
|---|---|---|
| Revenue-based return on ad spend (ROAS) | Attributed revenue ÷ advertising spend | Revenue associated with each £1 of ad spend |
| Contribution after marketing | Attributed revenue − direct delivery costs − marketing costs | What remains to contribute towards overheads and profit |
| Marketing return on a contribution basis | Contribution after marketing ÷ marketing costs × 100 | Return under the costs and attribution assumptions you have included |
None of these automatically establishes net profit. Net profit requires the applicable business expenses and accounting adjustments as well.
A hypothetical worked example
A campaign costs £2,000, including the marketing costs being assessed. Twelve new patients produce £600 each in recorded revenue. Direct delivery costs are £250 per patient.
| Item | Calculation | Amount |
|---|---|---|
| Recorded revenue | 12 × £600 | £7,200 |
| Direct delivery costs | 12 × £250 | £3,000 |
| Contribution before marketing | £7,200 − £3,000 | £4,200 |
| Contribution after marketing | £4,200 − £2,000 | £2,200 |
| Return on the stated contribution basis | £2,200 ÷ £2,000 × 100 | 110% |
If the £2,000 were entirely advertising spend, revenue-based ROAS would be 3.6×. If it includes other marketing costs, label £7,200 ÷ £2,000 as revenue divided by total assessed marketing cost, not ad-only ROAS.
The £2,200 is not net profit. Fixed overheads and other applicable expenses have not been deducted. These figures are hypothetical and do not predict your clinic's results.
Make the revenue number meaningful
Choose whether you are reporting booked value, invoiced value or collected revenue. Do not combine them under one label. Account for cancellations, refunds and relevant adjustments consistently.
A proposed £5,000 treatment plan is not £5,000 of collected revenue. A booking is not proof that treatment went ahead. Keep those stages visible rather than assigning every enquiry an assumed sale.
Google Ads allows different values to be attached to conversion actions. Check whether the reported value is actual revenue, an estimated lead value or another business measure before using it in a return calculation. Google Ads conversion values
Attribution is not the same as causation
A patient may encounter several campaigns, pages or recommendations before booking. An attribution model assigns credit among touchpoints; it does not by itself prove that the campaign caused every credited sale. Google Analytics attribution guidance
Use one stated attribution approach for a comparison. Explain missing source data, untracked calls and conversions still developing. Do not add two platforms' attributed revenue totals together when they may credit the same patients.
What if revenue is not connected?
Start with a reliable sequence:
Unique enquiry → contacted → booked → attended → agreed outcome → recorded revenue
Report the furthest stage you can verify. “£80 per attended consultation” is more useful than an invented return estimate.
For a scenario model, state every assumption: enquiry volume, booking rate, attendance rate, patient outcome rate, revenue, delivery cost and observation period. Clearly separate the scenario from measured performance.
What should change after the review?
- If enquiries are suitable but bookings are low, investigate response, availability and the enquiry experience.
- If bookings are strong but attendance is weak, review appointment information, scheduling and cancellations.
- If revenue grows but contribution does not, inspect costs, pricing, treatment mix and refunds before increasing spend.
- If evidence is incomplete, fix the measurement gap before treating a projection as a result.
Calculate patient acquisition cost and choose useful clinic KPIs.
Start Your Free Clinic Growth Audit to identify visible marketing and patient-journey gaps worth investigating.
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Questions clinic owners ask
How should a clinic calculate marketing ROI without confusing revenue and profit?
Define the acquisition costs and treatment contribution for the same patient cohort. Subtract acquisition costs from that contribution and divide the result by acquisition costs. State your assumptions and separate verified outcomes from estimates.
Is return on advertising spend the same as marketing ROI?
No. Return on advertising spend compares attributed revenue with media spend. It does not by itself account for treatment delivery costs, agency fees or the other costs needed to judge profitability.