Many self-employed dental associates ask whether they can employ their spouse and claim the salary as a tax-deductible business expense. The short answer is yes, but only if the arrangement is genuine and the pay is at a market rate for the work done. HMRC scrutinises family employment arrangements closely, and the rules on income shifting mean you cannot simply redirect your associate income to a spouse to reduce your tax bill.

This guide explains the tax rules for a dental associate employing a spouse, what counts as genuine employment, how to set up payroll correctly, and the common pitfalls that trigger HMRC enquiries. If you are an associate thinking about putting your spouse on the books, read this before you start.

Can a Self-Employed Dental Associate Employ Their Spouse?

Yes, a self-employed dental associate can employ their spouse. The associate's dental practice income is treated as trading income for tax purposes, and the costs of employing staff to assist with the practice are allowable deductions, provided the employment is genuine and the salary is reasonable.

However, the key condition is that the spouse must actually perform real work for the practice. HMRC will look at the facts, not just the paperwork. If the spouse has no meaningful duties, or if the salary is far above what the work is worth, HMRC can disallow the expense and treat the payments as income shifting.

Income shifting is the practice of diverting income from a higher-rate taxpayer (the associate) to a lower-rate taxpayer (the spouse) to reduce the overall tax bill. HMRC has specific anti-avoidance rules under the Arctic Systems principle (Jones v Garnett) that apply when a person performs services for a business and the income is redirected to a family member who does not contribute equally.

What Counts as Genuine Employment for a Spouse in a Dental Practice?

For HMRC to accept the spouse's salary as a deductible expense, the spouse must carry out real duties that are necessary for the practice. Examples of genuine roles include:

  • Administration and bookkeeping: Managing appointment scheduling, patient records, invoicing, chasing payments, reconciling bank statements, and preparing quarterly VAT returns.
  • Marketing and social media: Running the practice website, managing social media accounts, creating patient newsletters, and handling online reviews.
  • Patient liaison: Answering phone calls, handling patient queries, managing recall systems, and coordinating referral letters.
  • Compliance and CPD support: Keeping CPD records, managing indemnity renewals, organising training, and maintaining GDC registration documents.
  • Payroll and HR: Running payroll for any other staff, managing holiday and sickness records, and handling recruitment paperwork.

The spouse does not need to be a dental professional. Many associates employ a spouse who has skills in accounting, marketing, or general administration. The important point is that the work is actually done, and you can evidence it with timesheets, emails, task lists, or a written job description.

What Does Not Count as Genuine Employment?

HMRC will challenge arrangements where the spouse has no real duties. Common red flags include:

  • The spouse has no separate email address, phone line, or workspace.
  • The spouse's duties are identical to what the associate does themselves (e.g., both claim to do the same clinical work).
  • The spouse works very few hours but receives a large salary.
  • There is no written contract or job description.
  • The spouse does not appear on any practice correspondence or records.
  • The associate pays the spouse a round-sum amount each month with no link to hours worked.

If HMRC opens an enquiry and finds these features, they will likely disallow the salary and treat the payments as a gift from the associate to the spouse. The associate would then face additional tax, interest, and possibly penalties.

What Salary Can You Pay Your Spouse as a Dental Associate?

The salary must be at a market rate for the work done. You cannot pay your spouse £30,000 a year for 10 hours of basic admin work per week if the going rate for that work is £12,000. HMRC will look at what a third-party employee would be paid for the same role.

For 2025/26, the National Living Wage is £12.21 per hour for workers aged 21 and over. A reasonable salary for part-time administrative work might be between £12 and £18 per hour, depending on the complexity of the role and the associate's location. For more skilled roles (bookkeeping, marketing management), the rate could be higher.

A common approach is to pay the spouse up to the personal allowance threshold of £12,570 per year. This means the spouse pays no income tax on the salary, and the associate gets full tax relief at their marginal rate (20%, 40%, or 45%). The spouse will still need to pay Class 1 National Insurance contributions if earnings exceed the primary threshold (£12,570 for 2025/26).

Paying above £12,570 is possible, but the spouse will start paying income tax and employee NI, reducing the net tax saving. You also need to consider the employer's NI cost (15% on earnings above £5,000 per year from 2025/26).

Worked Example: Associate Employing Spouse at £12,570

Dr Patel is a self-employed dental associate earning £80,000 per year. She employs her husband, Ravi, to manage her practice administration and bookkeeping for 15 hours per week. She pays him £12,570 per year.

Tax saving for Dr Patel:

  • Salary paid: £12,570
  • Employer's NI (15% on £7,570 above £5,000 threshold): £1,135.50
  • Total cost to Dr Patel: £13,705.50
  • Tax relief at 40% on total cost: £5,482.20
  • Net cost after tax relief: £8,223.30

Tax position for Ravi:

  • Salary: £12,570
  • Personal allowance: £12,570
  • Income tax due: £0
  • Employee NI: £0 (earnings at threshold, no NI due)
  • Ravi takes home: £12,570

The household saves approximately £4,347 in tax compared to Dr Patel earning the full £80,000 and paying 40% on the top slice. However, this saving is only legitimate if Ravi genuinely does the work.

How to Set Up Spouse Employment Properly

If you decide to employ your spouse, follow these steps to stay on the right side of HMRC:

1. Write a Genuine Employment Contract

Draft a written contract of employment that sets out the job title, duties, hours of work, holiday entitlement, sick pay, and notice period. Both parties should sign it. This is not a formality: it is evidence that a real employment relationship exists.

2. Register as an Employer

You must register with HMRC as an employer. You can do this online via the PAYE service. You will receive an employer PAYE reference number. You must then run payroll each month or each week, reporting to HMRC through Real Time Information (RTI).

3. Pay a Market-Rate Salary

Set the salary at a rate that reflects the work done. Keep timesheets or a log of hours worked. Pay the salary through the payroll system, not as a lump sum or irregular payment. Do not pay the spouse from your personal bank account; use the practice business account.

4. Keep Records of Work Done

Maintain evidence of the spouse's work: emails they send, invoices they process, marketing materials they create, meeting notes, and task lists. If HMRC ever enquires, you need to show that the spouse was actually working, not just receiving money.

5. Consider a Separate Bank Account

It is good practice for the spouse to have their own bank account (not a joint account) into which the salary is paid. This reinforces the idea of a genuine employment relationship.

6. File RTI Returns on Time

You must submit Full Payment Submissions (FPS) to HMRC on or before each payday. Late filing can result in penalties. Most associates use payroll software (e.g., Xero, QuickBooks, or a free HMRC basic PAYE tool) to handle this.

What About the Associate's Limited Company?

Some dental associates operate through a limited company rather than as a sole trader. The rules are similar, but there is an additional layer: the company must pay the spouse a salary that is deductible against corporation tax. The same principles of genuine employment and market-rate pay apply.

If the associate's company pays the spouse, the company gets corporation tax relief at 19% or 25% (depending on profit level). The spouse pays income tax and NI as normal. The company must also pay employer's NI on earnings above £5,000 per year.

There is a potential advantage: the company can also pay the spouse dividends, subject to the £500 dividend allowance and dividend tax rates. However, dividends are not a deductible expense for corporation tax, and HMRC may challenge dividends paid to a non-working spouse as income shifting. Dividends should only be paid to shareholders, and the spouse must own shares in the company to receive them.

Common HMRC Challenges and How to Avoid Them

HMRC has a dedicated team that reviews family employment arrangements. Common triggers for an enquiry include:

  • The spouse's salary is exactly at the personal allowance threshold with no variation.
  • The associate's tax return shows a large drop in profit after employing the spouse.
  • The spouse has no other income and no record of employment elsewhere.
  • The associate claims the spouse works full-time but the practice turnover is small.
  • The spouse's duties are vague or not documented.

To reduce the risk of an enquiry, vary the salary slightly from year to year (within reason), keep detailed records, and ensure the spouse's role is genuinely necessary for the practice. If HMRC does open an enquiry, you will need to produce the employment contract, timesheets, and evidence of work done.

If HMRC concludes that the arrangement is income shifting, they will disallow the salary as a deductible expense. The associate will face additional tax at their marginal rate, plus interest from the date the tax should have been paid, and potentially penalties of up to 30% of the tax underpaid if HMRC considers it careless.

Alternatives to Employing a Spouse

If the spouse does not have time to do genuine work, or if the associate wants to share income without the employment risk, there are other options, though each has its own tax implications:

  • Partnership: The associate and spouse could form a partnership. The spouse would need to contribute capital and actively participate in the practice. HMRC can challenge partnerships that are purely tax-driven.
  • Limited company with spouse as shareholder: The spouse can hold shares and receive dividends, but dividends are not deductible for corporation tax, and the spouse must have contributed capital or value to the company.
  • Pension contributions: The associate can make pension contributions for the spouse (up to £3,600 gross per year without the spouse having earnings), which are tax-efficient but do not reduce the associate's income tax directly.
  • ISA savings: The associate can gift money to the spouse to invest in ISAs, but this is a gift, not a tax deduction.

Each option has different tax consequences and risks. A dental associate tax specialist can help you compare them based on your specific circumstances.

Practical Steps Before You Start

Before you put your spouse on the payroll, take these steps:

  1. Define the role: Write a clear job description. What exactly will the spouse do? How many hours per week? What skills do they bring?
  2. Check the market rate: Look at what similar roles pay in your area. Use websites like Indeed or Glassdoor, or ask your practice manager what they pay for admin staff.
  3. Set up payroll: Register as an employer with HMRC. Choose payroll software. Decide on monthly or weekly pay cycles.
  4. Open a separate bank account: The spouse should have their own account for salary payments.
  5. Review your practice accounts: Ensure your practice income can support the additional cost. Employing a spouse should not push the practice into a loss unless that is commercially justified.
  6. Speak to a dental accountant: Before implementing anything, get advice from an accountant who understands dental practice finances. The rules are nuanced, and a mistake can be costly.

If you are a dental associate considering employing your spouse, we can help you structure the arrangement correctly. Our team specialises in dental accountancy and can review your specific situation, set up payroll, and ensure you stay compliant with HMRC rules. Contact us for a free initial discussion.

For more guidance on associate tax planning, see our Associate Tax Survival Guide.