How to Calculate Profitability per Service in a Clinic Without Confusing Revenue with Margin

In managing a private clinic, there is a fundamental distinction that is often lost in the rush of day-to-day operations: revenue is not margin. Revenue represents the gross income generated by clinical activity, while margin is the net result after deducting all the costs associated with providing the service. Confusing the two concepts can lead to poor strategic decisions, such as keeping prices too low for services that consume critical resources or overlooking efficiency in areas that appear profitable but conceal high indirect costs.

To address this complexity, the literature on hospital management and health technology assessment offers robust methodological frameworks. The aim of this analysis is to adapt these concepts to the context of a private clinic in Spain, guiding readers in identifying costs, estimating the margin per service, and applying these data to decision-making.

Opportunity cost: the economic basis of the decision

Before classifying expenses, it is necessary to understand what is meant by cost in the broad economic sense. According to economic theory applied to healthcare, the relevant concept is opportunity cost. This is defined as the value of the best alternative forgone when a resource is used. In a clinic, resources (operating-room time, staff hours, physical space) are limited. Therefore, every hour devoted to a specific procedure means forgoing other possible activities.

Although accounting practice often uses market prices or wages paid as proxies for these costs, it is important to recognize that, in some cases, the price paid does not accurately reflect opportunity cost. For example, if staff who were previously unemployed are hired, the social opportunity cost could be lower than the wages paid. However, for the internal management of a private clinic, the practical approach focuses on actual monetary costs and the efficient allocation of available resources.

Cost classification: beyond visible expenses

The health technology assessment literature classifies costs into several categories, providing a more complete view of a clinic’s cost structure:

• Direct healthcare costs: These are the most visible and easily quantifiable. They include medicines, medical devices, surgical consumables, diagnostic tests, and the specific time healthcare staff devote to patient care. In a private clinic, these costs vary significantly depending on the type of service (a general medicine consultation has a much lower direct cost than orthopedic surgery).
• Direct non-healthcare costs: These include non-clinical resources related to the condition, such as patient transport or home adaptations. Although these costs are usually borne by the patient or their insurer in a private clinic, they are important to consider when evaluating the overall service experience.
• Indirect costs: These represent lost work productivity for the patient and caregiver. In the context of clinic management, these costs are not assigned directly to the entity’s operating account, but they are relevant to the social evaluation of the service.
• Intangible costs: Subjective aspects such as pain or anxiety. Although difficult to monetize, they influence patient satisfaction and therefore the clinic’s retention and reputation.

For internal profitability management, the focus should be on direct healthcare costs and the correct allocation of the clinic’s fixed and indirect costs (rent, administration, marketing, technology).

Cost systems and control of variability

A study published in Gaceta Sanitaria analyzed the relationship between the level of development of cost systems (CS) and variation in unit costs in hospitals in Spain’s National Health System (SNS) between 2010 and 2013. The results showed that implementing more developed cost systems was associated with an approximately 3.2% reduction in variation in cost per weighted activity unit (UPA).

This finding is relevant to private clinics because it shows that merely reducing expenses is not enough to control costs; a management information system is needed to measure and allocate resources correctly. A mature cost system makes it possible to identify which services are more expensive to produce and why, facilitating process optimization and supplier negotiations.

Practical application: from the ICU to the private consultation room

The methodology developed for highly complex units, such as Intensive Care Units (ICUs), can be adapted to less complex services in private clinics. An article in Medicina Intensiva details how costs are calculated in an ICU, distinguishing between:

1. Staff costs: Salaries, social security contributions, and overtime.
2. Fixed expenses: Rent, equipment depreciation, maintenance, insurance, and administrative expenses. These costs do not vary with activity volume in the short term.
3. Variable costs (consumables): Medicines, disposable materials, and energy consumed directly by treatment. These costs do vary with activity volume.

For a private clinic, the process for calculating the margin per service could follow these steps:

1. Identify cost centers: Group expenses by area (consultations, operating rooms, diagnostic imaging, administration).
2. Allocate direct costs: Record the consumables and staff time specific to each type of service. For example, the cost of an ultrasound includes the gel, the doctor’s and technician’s time, and use of the equipment.
3. Allocate indirect costs: Use allocation bases (such as the number of patients, usage time, or space occupied) to allocate fixed expenses to services. It is crucial to choose an allocation base that is consistent with actual resource consumption.
4. Calculate the total allocated unit cost: Divide the direct cost and the portion of indirect and fixed costs attributed to the service by the number of units performed during the period. The allocation should specify which costs it includes; an incomplete cost figure does not make it possible to calculate a net result.
5. Calculate the result per service: Subtract the total allocated unit cost from the net revenue per service. If only variable direct costs are deducted, the result is the contribution margin, not the net margin. To calculate the net margin per service, relevant indirect and fixed costs must also be included and allocated using an explicit criterion. It is useful to distinguish the monetary margin from the margin percentage: the latter is calculated by dividing the result per service by net revenue and multiplying by 100.

Implications for pricing strategy and service portfolio

Knowing the actual margin of each service allows clinic management to make informed decisions:

• Price review: If a service has a negative or very low margin, it is necessary to assess whether the price is too low, costs are inefficient, or the service should be discontinued.
• Capacity optimization: Services with a higher margin per hour of capacity should be prioritized in scheduling, provided this does not negatively affect quality or patient satisfaction.
• Portfolio management: It is possible to identify which services are