To calculate your income you must separate your NHS contract and estimated private income.

NHS

£10.00 per UDA x 8,000 UDAs per year                               £80,000

+

Private

Additional 20% of £80,000                                                    £16,000

Total Income with NHS and private treatments                       £96,000

One UDA is worth between £9.00 and £12.00 (net) it varies around the country, and the more need an area has for NHS dentists, the more a UDA is worth.

The actual cash value of a UDA is set by the local NHS Primary Care Trust, in discussion with the Dental Practice. If a dentist does a "simple" course of treatment, involving perhaps Exam, Radiographs, OHI, Perio Care, they will be awarded 1 UDA.

A treatment that involves fillings or extractions will earn the dentist 3 UDAs, and a course of treatment that needs lab work (like dentures or crowns) earns 12 UDAs.

UDAs go by the completed treatment, not the number of items in the treatment plan. 
- If you do a treatment with crowns, you will get 12 UDAs. (£180). It doesn't matter if it is 1 crown or 20 crowns, you still get a total of 12 UDAs.
- If you do a treatment involving endo, you get 3 UDAs (£45). Again, it doesn't matter if it is a simple upper incisor, or 5 difficult molars - the "payment" is the same.  (If you then restore the teeth with normal fillings, that is also included in the 3 UDAs for that course of treatment.)

How many UDAs?

The PCT sets a limit on how many UDAs you are allowed to do in a year. They may set your "contract" at  between 6,000 and 9,000 UDAs per year. The PCT will check regularly that you are achieving enough UDAs to meet your target.

If you accept the contract, you must complete your allocated UDAs by the year end. If you don't, the practice must pay back a proportion of the money. If you do more than 6,000 UDAs in a year the PCT won't pay you any extra for exceeding your contract.