Associate pay comes in three shapes: a percentage of gross fees (common in private and mixed practices), a rate per UDA (common for NHS work), or a blend of both. The headline number in the advert — "50%", "£14 a UDA" — tells you almost nothing on its own, because what it is a percentage of, and what comes off before it reaches you, can move the answer by five figures a year.
Whatever the format, the same four variables determine what actually lands in your account:
Only the first is usually advertised, and it is the least informative of the four.
Take an illustrative associate working four days a week, 44 weeks a year — 176 clinical days — generating an average of £1,250 a day in gross fees. That is £220,000 of gross fees for the year. Two offers land:
On a book with £26,000 of annual lab and materials, the arithmetic runs like this:
The lower headline percentage pays £3,300 more. Push the book towards crown and bridge so lab and materials reach £40,000, and the gap widens sharply: Offer A pays £70,000, Offer B pays 45% × £180,000 = £81,000 — a difference of £11,000 on identical clinical work. Move the other way, to a light-lab hygiene-heavy book at £12,000, and Offer A wins: £98,000 against Offer B's £93,600.
Those numbers are not a coincidence, and you can reduce them to a rule you can apply in ten seconds. Comparing "50% of gross with lab on you" against "45% of gross after lab", the two are identical when lab and materials equal 9.1% of your gross fees. Above that, the 45%-after-lab deal pays more. Below it, the 50% deal pays more.
So before you compare the percentages at all, work out one number: your lab and materials as a share of the fees you generate. Most mixed-practice associates land between 8% and 14%; a restorative-heavy private book runs higher. That single ratio tells you which structure suits the dentistry you actually do — and it is the reason two associates can look at the same pair of offers and be correct about opposite answers.
On NHS earnings your pension contribution is deducted at source, and the rate depends on your pensionable earnings. From 1 April 2026 the NHS Pension Scheme member tiers are:
The critical feature is that these tiers are not marginal the way income tax bands are. The rate that applies is applied to all your pensionable earnings, not just the slice above the threshold. An associate with net pensionable earnings of £52,000 pays 9.8% — £5,096. At £52,800 they pay 10.7% on the whole amount — £5,649.60. That extra £800 of pensionable earnings costs £553.60 in contributions, leaving £246.40. It is still a gain, and the employer contribution of 23.7% means the scheme remains outstanding value, but it is worth knowing where the steps sit before you agree sessions that nudge you over one.
The other point matters for your tax return rather than your pay: superannuation is a pension contribution, not a business expense. Putting it through your accounts as a cost of trade overstates your relief. Our associate expenses guide sets out what does and does not belong in the accounts.
On NHS work, a practice that delivers below 96% of its contracted UDAs faces financial clawback from the commissioner, up to the full value of the activity target, plus a breach notice. Between 96% and 100%, the activity carries forward into the following year instead. The question your contract answers is whether any part of that lands on you personally.
Personal clawback liability is a real term in real associate agreements, and it is not unreasonable in principle — but the drafting decides whether it is fair. A clause that recovers money from you for UDAs you were booked to deliver and did not is one thing. A clause that passes on a share of a practice-wide shortfall caused by unfilled surgeries, staff absence or a diary you did not control is another. Ask which it is, in writing, and ask what happens if you leave mid-year with your personal delivery ahead of target.
A headline rate in an empty diary loses to a slightly lower rate in a full one, every time. Before comparing percentages, establish what surrounds them: nursing support and whether you ever work without a nurse; materials quality and who chooses them; equipment age, and whether the scanner and the rotary endo you are used to are actually there; and marketing — who fills the book, and how new patients are allocated between associates. Ask what the current associates generate per day, and ask how long they have been there. A practice that will not answer either question has answered both.
An hour spent modelling an offer properly is the highest-paid hour of your year. We run that model with associate clients as a matter of course, alongside the basics in the associate tax guide — and if you are weighing your first contract, the first-year associate guide covers what else changes when you go self-employed.
Deadlines coming up, rule changes that affect dentists, and one number worth checking — once a month, no spam.
Neither is inherently better — they suit different dentistry. A percentage of gross rewards high-value private work and scales with what you can charge, so it favours associates with a restorative or cosmetic book in a practice whose fee scale is genuinely competitive. A UDA rate is predictable and insulates you from fee pressure, which suits high-volume NHS work where your output is measured in courses of treatment rather than fee value. The mistake is comparing the two formats on their headline numbers. Convert both into a realistic annual figure using your own achievable output and your own lab ratio, and the comparison becomes arithmetic rather than instinct.
More than almost any other term. If lab and materials are deducted from the gross before your percentage is applied, you carry only your share of that cost. If you receive a percentage of gross and then pay all the lab yourself, you carry the whole of it. On £220,000 of gross fees with £26,000 of lab, 50% of gross with lab on you pays £84,000, while 45% of gross after lab pays £87,300. The crossover sits at lab and materials of about 9.1% of gross: above that the lower percentage wins, below it the higher one does. Work out your own ratio from your pay statements before you compare any two offers.
An associate agreement can include personal clawback liability, and many do. What matters is the scope. Recovering money for activity you were scheduled to deliver and did not is a defensible term. A clause that passes on a share of a practice-wide shortfall caused by unfilled surgeries, equipment failure or a diary you did not control is far harder to justify, because you are being charged for a commercial risk you cannot manage. Ask for the clause to distinguish the two, ask what happens if you leave mid-year with your own delivery ahead of target, and get the answer in the contract rather than in an email.
It depends on your pensionable earnings, and the rate applies to all of them rather than only the amount above a threshold. From 1 April 2026 the NHS Pension Scheme member tiers run 5.2% up to £13,259, 6.5% to £28,854, 8.3% to £35,155, 9.8% to £52,778, 10.7% to £67,668 and 12.5% above that. Because the tiers are not marginal, crossing a threshold raises the rate on everything: £52,000 of pensionable earnings costs £5,096, while £52,800 costs £5,649.60. The employer contribution is 23.7%, so the scheme is still exceptional value — but the steps are worth knowing before you agree extra sessions.
Incorporation changes how your profits are taxed, not how much the practice pays you, so it never fixes a poorly structured associate agreement. It also interacts badly with the NHS pension: NHS pensionable earnings must be earned personally, so routing NHS income through a company can cost you scheme membership on that work. For an associate with substantial private income and no NHS commitment the sums can favour a company; for an NHS associate building 1995 or 2015 Section benefits, the pension usually outweighs the tax saving. Settle the pay structure first, then look at the wrapper — our incorporation guidance covers where the line falls.
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