What Is a UDA Value?
A UDA value is the monetary amount paid to a dental practice for each Unit of Dental Activity completed under an NHS contract. The term "UDA" stands for Unit of Dental Activity, which is the basic measure of NHS dental treatment in England and Wales. Each course of treatment is assigned a specific number of UDAs depending on its complexity, from a simple examination (1 UDA) to a more complex procedure such as a crown or bridge (up to 12 UDAs).
The UDA value is the price per unit that the practice receives from NHS England (or the equivalent body in Wales) for delivering that activity. It is not a fixed national figure. Each practice negotiates its own UDA rate as part of its NHS contract, and these rates can vary significantly by region, by practice, and even by contract type.
For UK dentists, understanding your UDA value is fundamental to practice financial planning. Whether you are a practice owner managing an NHS contract or an associate working under a fee-per-UDA arrangement, the UDA rate directly affects your income and the viability of your practice.
How Is a UDA Value Calculated?
There is no single formula for calculating a UDA value. The rate is determined when the NHS contract is awarded or renegotiated. Historically, UDA values were set based on historical activity levels and the practice's previous gross fees, adjusted for inflation and local commissioning priorities.
In practice, the calculation works backwards. The total annual contract value (the gross fee the practice receives for NHS work) is divided by the total number of UDAs the practice is contracted to deliver. For example:
- Annual contract value: £200,000
- Total contracted UDAs: 8,000
- UDA value: £200,000 ÷ 8,000 = £25.00 per UDA
This is a simplified example. In reality, the contract value may include adjustments for seniority payments, maternity leave, or other allowances. But the core principle remains: the UDA value is the contract value divided by the UDA target.
It is important to note that UDA values vary widely. In England, the average UDA rate is often quoted between £25 and £35, but individual contracts can range from as low as £15 per UDA in some areas to over £45 in others. Wales uses a different contract structure with its own unit values, and Scotland operates under the Statement of Dental Remuneration (SDR) system, which does not use UDAs at all.
Why Does UDA Value Matter for UK Dentists?
Your UDA value determines the financial health of your NHS contract. A higher UDA rate means more income for the same amount of clinical work. Conversely, a low UDA rate can make it difficult to cover practice overheads and pay associates a fair fee.
For practice owners, the UDA value is a key metric when assessing whether to take on or renew an NHS contract. It also affects the valuation of the practice. When you sell a dental practice, the goodwill value is often linked to the profitability of the NHS contract, which in turn depends on the UDA rate. Practices with higher UDA values tend to command higher multiples.
For associates, the UDA rate determines your fee split. Most associate agreements are structured as a percentage of the UDA value, typically 40% to 55% depending on the practice's overheads and whether the associate pays for lab fees and materials. If your UDA value is £30 and your fee split is 50%, you earn £15 per UDA before tax and expenses. Understanding your UDA calculation is therefore essential for negotiating your associate contract.
For locum dentists, the UDA rate affects the daily or per-UDA rate you can charge. Practices with higher UDA values can afford to pay locums more, while those with lower rates may struggle to cover locum costs.
How to Check Your UDA Value
Your UDA value should be stated in your NHS contract documentation. If you are a practice owner, the contract will specify the total annual contract value and the UDA target. Dividing the former by the latter gives your UDA rate.
If you are an associate, your practice owner should be able to tell you the UDA value for the contract you work under. Some associate agreements explicitly state the UDA rate used for calculating your fee. If yours does not, ask for it. It is reasonable to know the rate that underpins your income.
You can also use our NHS UDA value calculator to estimate your rate based on your contract details. This tool is useful for checking whether your contract is financially viable or for comparing different contract offers.
UDA Value and Practice Profitability
The UDA value is only one part of the profitability equation. You also need to consider the cost of delivering each UDA. Overheads such as staff salaries, rent, materials, lab fees, and equipment depreciation all eat into the margin.
For example, if your UDA value is £28 and your cost per UDA is £20, you make £8 profit per UDA. If you deliver 6,000 UDAs per year, that is £48,000 profit from the NHS contract before tax. If your cost per UDA is £25, the profit drops to £18,000. Understanding your cost base is as important as knowing your UDA rate.
Practice owners should regularly review their UDA value against their cost per UDA. If the margin is too thin, you may need to renegotiate the contract, reduce costs, or increase private income to cross-subsidise the NHS work.
For more detailed guidance on practice financial planning, see our NHS contract essentials guide.
UDA Value and Associate Agreements
Associate dentists often work on a fee-per-UDA basis. The typical arrangement is a percentage of the UDA value, with the associate receiving a set amount for each UDA they complete. The percentage varies depending on whether the practice provides materials, lab fees, and nurse support.
A common associate fee split is 50% of the UDA value. If the UDA value is £30, the associate earns £15 per UDA. If the associate completes 2,000 UDAs per year, that is £30,000 gross income from NHS work before tax and expenses.
Some associate agreements use a "net fee" model where the associate receives a fixed fee per UDA regardless of the practice's UDA value. This is less common but can be simpler for budgeting. Either way, knowing the UDA value helps you assess whether the fee is fair.
Associates should also consider the UDA target. If you are expected to deliver a high number of UDAs in a short time, the effective hourly rate may be lower than it appears. Use our associate take-home calculator to estimate your net income after tax and expenses.
UDA Value and Practice Sale
When selling a dental practice, the UDA value is a critical factor in the valuation. Buyers assess the profitability of the NHS contract by looking at the UDA rate and the cost structure. A practice with a high UDA value and low overheads is more attractive and will command a higher goodwill multiple.
Goodwill valuation methods typically use an earnings-based approach, applying a multiple to the adjusted EBITDA (earnings before interest, tax, depreciation, and amortisation). The UDA value directly affects EBITDA. A £5 increase in UDA value on a 6,000-UDA contract adds £30,000 to EBITDA. At a multiple of 1.0x, that is £30,000 more in goodwill value.
For more on this topic, see our goodwill valuation and sale playbook and our practice valuation calculator.
Common Questions About UDA Values
Can UDA values be renegotiated? In theory, yes, but in practice it is difficult. NHS contracts are typically fixed for the duration of the agreement, which can be several years. Renegotiation may be possible if there is a significant change in circumstances, such as a merger or a change in the local commissioning landscape. Most practice owners accept the UDA value as given and focus on managing costs.
Do UDA values increase with inflation? Not automatically. Some contracts include inflationary uplifts, but many do not. The NHS contract value may be reviewed periodically, but the UDA rate is not indexed to inflation in the same way as private fees. This means that over time, the real value of the UDA can fall if costs rise faster than the contract value.
How do UDA values differ between England and Wales? Wales uses a different contract structure with its own unit values. The Welsh contract is based on a "banded" system similar to England but with different band values and activity targets. The principles are the same, but the specific rates and rules differ. If you work across borders, you need to understand the contract in each jurisdiction.
What happens if I do not meet my UDA target? Failure to meet the UDA target can result in clawback of funding. The NHS may reduce the contract value for the following year or require repayment of overpaid fees. It is essential to monitor your UDA delivery throughout the year and adjust your appointment scheduling accordingly.
Practical Steps for Dentists
- Know your UDA value. Check your contract or ask your practice owner. Write it down and use it for financial planning.
- Calculate your cost per UDA. Add up all practice overheads and divide by the number of UDAs delivered. Compare this to your UDA value to see your margin.
- Review your associate fee split. If you are an associate, ensure your fee per UDA is fair relative to the practice's UDA value and overheads.
- Plan for UDA delivery. Monitor your UDA count monthly to avoid falling short of the target.
- Consider private income. If your UDA value is low, look for opportunities to increase private work to improve overall profitability.
For tailored advice on your specific situation, speak to a dental-specialist accountant. We at Dental Finance Partners work exclusively with UK dentists and understand the nuances of NHS contracts and UDA calculations. Contact us for a free initial consultation.