Many of the costs in medical practices are fixed and do not vary much or at all, regardless of how many patients you see.
Examples of fixed costs include rent, some insurance premiums, wages for permanent staff, cleaning services, and website hosting.
Some fixed costs may increase at regular intervals (eg your rent might increase after three years).
Generally speaking, you can do little to control your fixed costs, although you can aim to reduce some of them by, for example, negotiating with the premises’ owner, and “shopping around” for cheaper providers.
Examples of non-fixed costs include utilities and consumables, which can vary depending on how many patients you see and what their needs are, how many hours your practice is open, and purchase practices (eg buying printed stationery in bulk to reduce unit costs). You can control some of these costs by asking staff to turn off equipment and lights when they’re not in use, compare costs of different suppliers before ordering, and to not waste consumables.