Opting out is a cash-flow and tax decision, not just a clinical one
Handing back or not renewing your NHS dental contract changes far more than your appointment book. It ends your Units of Dental Activity (UDA) income, removes your year-end clawback exposure, alters your NHS pension position and reshapes how you take money out of the practice. None of this is a single tax event with one bill attached. It is a set of moving parts that interact, and the right answer is specific to your contract, your patient base and how close you are to retirement.
This article sets out the real implications of opting out of an NHS contract for a UK dentist going fully or more private, framed for the 2026/27 tax year. It covers what happens to your UDA income and clawback risk, the NHS pension consequence, the VAT position (and the myth that going private means charging VAT), profit extraction at current rates, and the cash-flow change you should plan for.
What you actually give up: UDA income and clawback risk
An NHS General Dental Services (GDS) contract is a target-based agreement. You receive monthly payments against an annual UDA target, and at year-end your actual delivery is reconciled against that target. Deliver below target and the commissioner claws back the unearned portion. There is no single national UDA value; each contract has its own per-UDA rate set from a historic baseline and uplifted over time.
When you opt out, two things happen at once. You lose the guaranteed monthly UDA income, and you also lose the clawback exposure that comes with it. For a practice that has been under-delivering and facing repeated year-end clawback, removing that liability is a genuine benefit of going private that is easy to overlook. For a practice that comfortably hits target, the loss of predictable income is the dominant effect.
Crucially, the NHS contract has no separate capital value to you. You cannot sell it to another dentist on its own, and handing it back is not a disposal of a chargeable asset. The contract only carries value into a transaction on a sale of the practice as a going concern, where it transfers to the buyer by novation with commissioner consent. If you simply opt out, that route closes. We cover the sale-and-novation alternative in our guide on transferring an NHS dental contract on a practice sale.
The VAT myth: clinical dental care stays exempt
The single most common error around opting out is the belief that going private means you must start charging VAT on your treatment. You do not. The supply of clinical dental care by a registered dentist or dental care professional is exempt from VAT under VATA 1994 Schedule 9 Group 7, and that exemption applies whether the care is NHS-funded or privately paid. Switching your funding mix from NHS to private does not convert exempt clinical care into a taxable supply.
The exemption turns on the supply being medical care, meaning its principal purpose is protecting, maintaining or restoring health. The only dental income that falls outside the exemption and becomes standard-rated is work that is purely cosmetic or aesthetic with no therapeutic purpose. Facial aesthetics such as Botox and dermal fillers carried out for cosmetic reasons are the classic example, and some tooth whitening is a borderline case HMRC scrutinises on a principal-purpose basis.
| Type of income | VAT treatment | Counts towards the £90,000 threshold? |
|---|---|---|
| NHS clinical dental care | Exempt (Sch 9 Group 7) | No |
| Private clinical dental care | Exempt (Sch 9 Group 7) | No |
| Cosmetic facial aesthetics (no therapeutic purpose) | Standard-rated at 20% | Yes |
| Cosmetic-only tooth whitening | Standard-rated (principal-purpose test) | Yes |
So VAT exposure does not grow because you go more private. It grows only if you build a meaningful book of cosmetic, standard-rated work. The VAT registration threshold is £90,000 of taxable (non-exempt) turnover measured over a rolling 12 months, raised from £85,000 on 1 April 2024. Your exempt clinical income, however large, does not count towards that £90,000. Many practices going more private add facial aesthetics at the same time, so it is the aesthetic income, not the dental income, that needs watching.
If your taxable supplies do cross the threshold and you register, you become partially exempt: you make both exempt (clinical) and taxable (cosmetic) supplies, and you can only recover input VAT attributable to the taxable side, subject to the de minimis test. That is a manageable position, but it is driven by your cosmetic income, not by the act of leaving the NHS. Our guide on facial aesthetics and VAT walks through the partial-exemption mechanics in detail.
The NHS pension consequence
The NHS Pension Scheme is one of the most valuable benefits attached to NHS work, so the accrual you give up is often the largest hidden cost of opting out. Leaving the contract does not close your scheme membership, but it ends NHS pension accrual on the income you stop earning. As your NHS-derived pensionable income falls, your future benefit build-up falls with it.
Everyone now accruing in the scheme does so in the 2015 Career Average Revalued Earnings (CARE) section, which builds pension at 1/54th of each year's pensionable earnings, revalued each year while you remain active. The benefits you have already earned are preserved and revalued, and you keep them. What you lose is the future accrual on the income that disappears. If you continue any NHS work as a locum or associate, you keep accruing on that reduced pensionable income.
There is a further trap if you go private through a limited company. For an incorporated dentist taking a PAYE salary, only the salary is pensionable; dividends are not pensionable. So a switch from NHS-derived pensionable profit into a low-salary, high-dividend extraction can cut your pensionable pay sharply and stop accrual on the dividend portion entirely. For a dentist within ten to fifteen years of retirement, the cumulative accrual given up can run well into the tens of thousands of pounds of eventual annual pension. This is the part of the decision that most rewards careful modelling. Our guide to what counts as NHS pensionable pay for dentists sets out exactly which earnings build benefits.
Profit extraction after you go private (2026/27 rates)
Once your income shifts from guaranteed UDA payments to variable private fees, how you structure and extract profit becomes more important. The headline tax rates do not change when you leave the NHS, but the loss of a predictable income floor changes the planning.
If you trade as a sole trader or partnership, you pay income tax plus Class 4 National Insurance on your profit share. Class 4 NIC is 6% on profits between £12,570 and £50,270 and 2% above £50,270, and Class 2 NIC is no longer payable (it was removed from 6 April 2024, with self-employed profits above the small-profits threshold treated as having paid). The personal allowance is £12,570 and tapers away between £100,000 and £125,140 of income, creating an effective marginal rate above 60% in that band that careful timing of income can soften.
If you operate through a limited company, the company pays corporation tax and you extract profit through salary, dividends and pension contributions. The current rates are:
| Tax | 2026/27 position |
|---|---|
| Corporation tax | 19% small-profits rate (profits up to £50,000), 25% main rate (above £250,000), marginal relief in between |
| Dividend ordinary rate | 10.75% |
| Dividend upper rate | 35.75% |
| Dividend additional rate | 39.35% |
| Dividend allowance | £500 |
| Employer (secondary) NIC | 15% on salary above the £5,000 secondary threshold |
| Class 4 NIC (self-employed) | 6% (£12,570 to £50,270), then 2% |
The dividend ordinary and upper rates rose from 6 April 2026 (to 10.75% and 35.75%), which narrows the gap between extracting profit as dividends through a company and simply drawing self-employed profit. That matters specifically for the opt-out decision, because the case for incorporating a newly-private practice is weaker than the old 8.75%/33.75% figures suggested. Pair any incorporation tax comparison with the NHS pension accrual you would lose on the dividend portion: the two effects pull in opposite directions and need to be weighed together, never the tax saving alone.
If you employ staff, employer NIC is 15% on earnings above the £5,000 secondary threshold. The Employment Allowance can offset some of that where you are eligible, though it is not available to a company whose only employee is a single director. A genuinely employed spouse paid at a market rate for real work can change that position, but the work and pay must be genuine and documented through PAYE.
The cash-flow change to plan for
The financial risk of opting out is not really about tax rates. It is about cash flow during the transition. NHS monthly payments are predictable; private fee income is not, especially in the first 12 to 24 months while you rebuild patient relationships on a fee-paying basis. You may lose the income floor before the private base has fully replaced it.
Plan for that gap deliberately:
- Build a buffer. Hold enough working capital to cover the dip between losing UDA payments and private income stabilising.
- Reset your drawings. If you incorporate, set a sustainable salary and take dividends only out of genuinely available distributable profit, not in anticipation of it, to avoid an overdrawn director's loan account and a section 455 charge.
- Re-budget your tax payments. Self-assessment payments on account are based on the prior year. A profit profile that changes sharply after opting out can leave payments on account misaligned with the new reality, which you can manage by claiming to reduce them where justified.
- Watch any new cosmetic income against the VAT threshold. If facial aesthetics grow, track that taxable turnover against the rolling £90,000 limit so registration does not arrive as a surprise.
Handback versus a practice sale
There are two ways to leave NHS dentistry, and they have very different financial consequences:
- Handback or non-renewal. You notify the commissioner and the contract ends. You keep no capital value from the contract, and you continue as a private practice or wind down. This is the route this article focuses on.
- Sale as a going concern. You sell the practice and the buyer takes over the NHS contract by novation with commissioner consent. The contract value is preserved within the sale price, and any gain on the disposal of goodwill and other assets can potentially be relieved.
If your goal is to extract value from the business, a sale almost always beats a handback, because the contract carries value into the transaction rather than simply ending. A handback makes sense when you intend to keep practising privately, or where a sale is not realistically achievable. The two routes are not interchangeable, and the choice should be made before you give notice. Our guide on transferring an NHS dental contract on a practice sale covers the novation route in full.
Steps to take before you give notice
Before you commit to opting out, work through the following:
- Model the NHS pension you would give up. Especially if you are within fifteen years of retirement, the lost accrual can be the deciding factor.
- Stress-test the cash-flow transition. Build a month-by-month forecast through the first two years of private-only income.
- Confirm your VAT position. Establish whether any cosmetic income will push your taxable turnover towards the £90,000 threshold, and ignore the myth that clinical care becomes taxable.
- Decide handback versus sale deliberately. If there is any prospect of selling, explore the novation route before giving notice.
- Keep your Performers' List status if you will do any NHS work. You must remain listed to continue as a locum or associate.
- Take dental-specialist advice. The interaction of UDA income, NHS pension, VAT and profit extraction is fact-specific, and a generalist adviser can miss the pension and VAT points entirely.
Final thoughts
Opting out of an NHS dental contract is a significant financial decision, but it is not the tax minefield it is sometimes made out to be. Handing back the contract ends your UDA income and your clawback risk, reduces your NHS pension accrual on that income, and changes your cash flow. It does not, by itself, make your clinical dental care subject to VAT: clinical care stays exempt, and VAT only enters the picture through cosmetic, standard-rated work. The profit-extraction maths runs at the same 2026/27 rates whether you are NHS or private, with the dividend rise narrowing the incorporation case.
The dentists who handle opt-out well plan it 12 to 24 months ahead, model the pension and cash-flow effects properly, and decide consciously between handback and sale. If you are weighing up leaving the NHS contract, speak to the team at Dental Finance Partners for a confidential discussion of your options.