By Dr. Ndubuisi “Andy” Egwim – MBBS, former NHS Salaried GP, author of The Moneywise Doctor.
Moneywise Doctor provides financial education, not regulated financial advice.
Many consultants start private practice without a clear plan for the tax that follows. Private practice income adds to your total taxable income for the year, which means it can push you into a higher tax band, trigger the personal allowance taper, or affect your annual pension allowance. How you structure that income, whether as a sole trader or through a limited company, also changes how much tax you actually pay.
This guide breaks down what happens to your tax position once private income enters the picture, and what to check before your first private clinic.
Why does this matter for consultants specifically?
NHS consultant salaries already sit close to key tax thresholds for many doctors. Private practice income lands on top of that NHS salary. It doesn’t get its own separate, lower tax treatment. This is why some consultants find that a chunk of new private earnings disappears faster than expected. The extra income can push total earnings into the 60% tax trap band or the additional rate band.
If you want a clear picture of how your own combined income sits against these thresholds, the Tax Hack X-Ray Scorecard flags the gaps most doctors miss in under two minutes.
How does private income affect your overall tax position?
HMRC treats your NHS salary and your private practice income as one combined total for tax purposes. Your tax band depends on that combined figure, not on each income source separately. This has three main effects:
- It can push part of your income into a higher tax band.
- It can trigger the personal allowance taper if your total income passes £100,000.
- It can increase your pension growth for the tax year, which may create an annual allowance charge.
What are the key rules to understand?
- Sole trader route. Most consultants start here. You report private income through Self Assessment and pay Income Tax and National Insurance on the profit.
- Limited company route. Some consultants incorporate once private income grows. The company pays Corporation Tax on profit, and you then take income as salary, dividends, or a mix of both.
- Expenses reduce taxable profit. Costs like professional indemnity for private work, room hire, and equipment can often be deducted before tax is calculated, whichever structure you use.
What mistakes do consultants commonly make?
- They treat private income as separate from NHS income for tax purposes, when HMRC combines both.
- They delay registering for Self Assessment, which can lead to penalties.
- They don’t track private practice expenses properly, so they miss deductions they’re entitled to.
- They incorporate too early or too late. Timing matters, and it depends on income level, not just personal preference.
What should you think about before deciding how to structure private income?
Think about how much private income you expect to earn in the next few years, not just this year. Consider whether a limited company structure could reduce your overall tax exposure at your expected income level. Check how new private income might affect your NHS pension annual allowance, especially in a year with other income changes.
When should you get professional advice on this?
Get advice before your private income grows significantly, not after. A regulated adviser or accountant can help you choose between sole trader and limited company structures. They can also help you plan around the annual allowance and the personal allowance taper before a tax bill arrives unexpectedly.
Frequently asked questions
Do I pay tax on private income separately from my NHS salary?
No. HMRC combines both incomes into one total for tax purposes. Your tax band depends on the combined figure.
Should I set up a limited company for private practice income?
It depends on your income level and plans. A limited company can reduce tax at higher income levels, but it also brings extra admin and Corporation Tax obligations. A regulated adviser can help you decide.
Can private practice income affect my NHS pension?
Yes, indirectly. Higher total taxable income in a year can increase your pension growth for annual allowance purposes, which may create a tax charge.
Do I need to register for Self Assessment for private income?
Yes, in most cases. If you earn private income outside PAYE, you generally need to register for Self Assessment and report it.
Can I claim expenses against private practice income?
Yes. Costs like professional indemnity for private work, room hire, and equipment can often reduce your taxable profit, subject to normal HMRC rules.
Find out exactly where your combined income creates tax risk
Take the Tax Hack X-Ray
Private income changes your tax position fast. The Tax Hack X-Ray Scorecard is a two-minute diagnostic built for doctors. It scans your combined income, allowances, and reliefs for the gaps most consultants miss.
It helps you:
- See where your combined income sits against key tax thresholds
- Spot allowances and reliefs you may not be using
- Get a clear next step, whether that’s a simple fix or a conversation with an adviser