Should You Take a Salary or Work as a Self-Employed Associate?
Every UK dentist faces this choice at some point. Foundation dentists start on a salaried PAYE contract with automatic NHS Pension enrolment. After foundation training, the path splits. You can take a salaried associate position (employed by the practice) or a self-employed associate role (fee split arrangement). The tax and NI treatment differs significantly between the two, and the right answer depends on your personal circumstances, risk appetite, and long-term plans.
This article compares the dentist tax structure for both routes using 2025/26 rates. It uses real examples to show the net income difference, the pension implications, and the non-financial factors that matter. The goal is to help you decide which structure fits your situation, not to recommend one over the other for everyone.
How the Two Structures Work
Salaried Associate (PAYE)
A salaried associate is an employee of the dental practice. The practice deducts income tax and employee National Insurance through PAYE before paying you. The practice also pays employer NI at 15% on earnings above £5,000 per year (2025/26 rate). You receive a payslip, a P60 at year end, and have employment rights including holiday pay, sick pay, and maternity/paternity leave. Your NHS Pension contributions are deducted automatically by the practice.
Self-Employed Associate (Fee Split)
A self-employed associate invoices the practice for their share of fees. You handle your own tax and NI through Self Assessment. You pay Class 4 NI at 6% on profits between £12,570 and £50,270, and 2% above that. Class 2 NI was abolished from April 2024. You have no employer NI cost for the practice. You have no statutory employment rights. Your NHS Pension contributions are your responsibility to arrange and pay, though the practice may handle the deduction as an agent.
Tax and NI Comparison for 2025/26
The headline difference is employer NI. A practice paying a salaried associate must add 15% employer NI on top of the salary. For a self-employed associate, the practice pays nothing beyond the fee split. This makes self-employed associates cheaper for the practice, which is why most private and mixed practices prefer this model.
For the dentist, the comparison looks like this on a gross income of £80,000:
Example 1: Salaried Associate on £80,000
- Gross salary: £80,000
- Personal allowance: £12,570
- Basic rate tax (20% on £37,700): £7,540
- Higher rate tax (40% on £29,730): £11,892
- Total income tax: £19,432
- Employee NI (8% on £37,700 + 2% on £29,730): £3,011 + £595 = £3,606
- Net take-home pay: £80,000 - £19,432 - £3,606 = £56,962
- Employer NI cost to practice: 15% on £75,000 (£80,000 - £5,000 threshold) = £11,250
- Total cost to practice: £80,000 + £11,250 = £91,250
Example 2: Self-Employed Associate on £80,000 Gross Fees
- Gross fees: £80,000
- Allowable expenses (estimate 10% for lab, materials, CPD, indemnity, travel): £8,000
- Net profit: £72,000
- Personal allowance: £12,570
- Basic rate tax (20% on £37,700): £7,540
- Higher rate tax (40% on £21,730): £8,692
- Total income tax: £16,232
- Class 4 NI (6% on £37,700 + 2% on £21,730): £2,262 + £435 = £2,697
- Net take-home pay: £72,000 - £16,232 - £2,697 = £53,071
- No employer NI cost to practice
- Total cost to practice: £80,000 (fee split)
The self-employed associate takes home about £3,891 less than the salaried associate on the same gross income. But the practice saves £11,250 in employer NI. This is why many practices offer a higher gross fee to self-employed associates to make the arrangement attractive.
NHS Pension Implications
The associate vs employee decision has major consequences for your NHS Pension. Salaried associates are automatically enrolled and the practice deducts contributions. Self-employed associates must opt in separately and arrange contributions themselves. The employer contribution (currently 20.68% of pensionable pay for the 2015 scheme) is paid by the practice for salaried associates. For self-employed associates, the practice does not pay employer contributions. You only get the member contribution (your own money) building up in the scheme.
This is a significant difference. On £80,000 pensionable earnings, the employer contribution would be £16,544 per year. A self-employed associate loses that entirely. Over a 30-year career, that could mean £500,000 less in pension value before investment growth. If NHS Pension membership is important to you, a salaried role may be the better choice despite the lower headline fee.
Expenses and Deductions
Self-employed associates can claim a wider range of business expenses than salaried associates. Typical allowable expenses include:
- Indemnity insurance (MDU, Dental Protection, MDDUS)
- CPD courses and travel
- Professional subscriptions (GDC, BDA, local dental committee)
- Surgery rent if you pay it separately
- Lab fees and materials if you bear the cost
- Use of home as office (limited)
- Travel between practices if you work at multiple sites
Salaried associates can only claim expenses that are "wholly, exclusively, and necessarily" incurred in the performance of their duties. This is a stricter test. Most salaried associates cannot claim travel to their main practice, indemnity (if the practice pays it), or GDC fees (if the practice pays them). If you pay these costs yourself as a salaried associate, you can claim them, but the bar is higher.
Employment Rights and Risk
Salaried associates have statutory employment rights. These include:
- Statutory Sick Pay (SSP) from day 4 of illness
- Statutory Maternity, Paternity, and Adoption Pay
- Holiday pay (5.6 weeks per year)
- Notice period (statutory minimum or contractual)
- Protection from unfair dismissal (after 2 years)
- Employer liability insurance cover
Self-employed associates have none of these. If you are sick and cannot work, you earn nothing. If you take maternity leave, you receive no statutory pay unless you have voluntarily paid Class 2 NI (abolished) or made other arrangements. You must arrange your own income protection insurance and critical illness cover. The trade-off is greater flexibility: you can choose your hours, work at multiple practices, and have more control over your schedule.
IR35 and Status Considerations
HMRC and employment tribunals look at the actual working relationship, not the contract label. The BDA's model associate agreement does not guarantee self-employed status. Tribunals consider control, substitution, mutuality of obligation, financial risk, and integration into the practice. If you work exclusively for one practice, use their equipment, follow their appointment book, and have no right to send a substitute, HMRC may argue you are a disguised employee.
This matters because if HMRC reclassifies you as an employee, they can demand back taxes, NI, and penalties. The practice may also face employer NI liabilities. The risk is higher for associates who work full-time at a single practice with minimal autonomy. If you work across multiple practices, set your own hours, and bear financial risk (e.g., paying lab fees), your self-employed status is more defensible.
Which Structure Suits Which Dentist?
Salaried Associate Suits You If:
- You value predictable income and employment rights
- NHS Pension membership is a priority
- You want automatic tax deductions and less admin
- You are risk-averse and want sick pay and holiday pay
- You work mainly NHS and the practice offers a salaried model
Self-Employed Associate Suits You If:
- You want higher gross fees (practices can afford to pay more without employer NI)
- You work at multiple practices and value flexibility
- You have significant business expenses to offset
- You are comfortable managing your own tax and NI through Self Assessment
- You have income protection and other insurance in place
Real-World Decision: A Worked Example
Consider Dr Patel, a foundation dentist finishing training in 2025. She has two offers:
- Offer A: Salaried associate at £65,000 with NHS Pension, 28 days holiday, sick pay
- Offer B: Self-employed associate at 50% fee split, projected gross £90,000, no benefits, must arrange own pension
On the surface, Offer B looks better. But after expenses (say £9,000), the net profit is £81,000. Tax and NI take about £19,500, leaving £61,500. No employer pension contribution. Offer A gives £65,000 less tax and NI of about £14,500, leaving £50,500, plus employer pension contributions worth £13,442 per year. Over 10 years, Offer A's pension value (employer contributions plus growth) could exceed £200,000. Dr Patel needs to decide whether the extra £11,000 annual take-home from Offer B is worth losing the pension and employment rights.
There is no universal answer. It depends on her age, health, family plans, and long-term career goals. A dental-specialist accountant can model both scenarios with her specific numbers.
Practical Steps to Decide
- Get both offers in writing with all terms specified
- Use the Associate Take-Home Calculator to compare net income
- Check the NHS Pension implications with NHSBSA or a specialist adviser
- Review your employment status risk with a dental accountant
- Consider your personal circumstances: do you need sick pay? maternity cover? flexibility?
- Speak to a dental associate tax specialist before signing any agreement
Summary
The PAYE vs Self Assessment decision for UK dentists is not just about tax rates. It involves employer NI, NHS Pension contributions, employment rights, expense deductibility, and status risk. A salaried associate typically takes home more from the same gross income due to lower NI, but the practice pays more. A self-employed associate can negotiate a higher gross fee because the practice saves employer NI, but loses employment rights and employer pension contributions.
For most dentists, the right choice depends on whether you value security and pension or flexibility and higher immediate income. There is no one-size-fits-all answer. Model your specific numbers, consider your personal circumstances, and take professional advice before committing to either structure.
For a detailed review of your situation, book a consultation with a dental-specialist accountant who understands the nuances of the dentist tax structure in 2025/26.