How about this then , the average UDA value (unit of dental activity) is £28 in England .
A very experienced dentist in a low needs area can do 30 UDAs a day , on average . Of course this is not every day , working at 5 day week , with time off for holidays and training which is not paid for.
That makes £840 a working day coming in.
To run one room in a cheap area in a practice set up for mainly NHS work ( no practice does no private work) costs from £140 an hour without paying clinician etc . That includes lunch times,training days , sick days etc. So just to cover fixed costs is £1320 a day without clinician being paid.
Another way to look at it is the average payment per person per course of treatment , including patient payments is £39. How much time and equipment would that buy for a plumber or garage. There is no other money coming in to fund a practice and people , everything is funded from that.
Unless your practice was bought decades ago by the current owner has no mortgage or loans for equipment (equipment needs replacing very often and is massively expensive) or has a massively higher UDA it will do some private work to keep the lights on and pay clinicians . The large majority of dental work value is private across all practices.
Finally two of my friends gave up their NHS contracts this year to go completely private. Their NHS contract were well under a million yet both practices were losing a six figure sum on the NHS and they could no longer justify that degree of subsidy from the private side