GP corporation tax affects thousands of medical professionals operating through limited companies in the UK. Whether you're considering incorporation or already running an incorporated practice, understanding how corporation tax applies to medical services is essential for effective tax planning.
The decision to incorporate your GP practice fundamentally changes your tax obligations. Instead of paying income tax and National Insurance as a sole trader or partnership, your practice pays GP corporation tax on profits, while you pay personal tax on salary and dividends.
Current GP Corporation Tax Rates 2025/26
Corporation tax rates for GP practices follow the standard UK rates. For the 2025/26 tax year, these are:
- Small profits rate: 19% on profits up to £50,000
- Marginal rate: 26.5% on profits between £50,000 and £250,000
- Main rate: 25% on profits over £250,000
Most GP practices fall into the marginal rate band. For example, a practice with £150,000 profit pays 19% on the first £50,000 (£9,500) and 26.5% on the remaining £100,000 (£26,500), totalling £36,000 in GP corporation tax.
How GP Corporation Tax Differs from Personal Tax
The shift from personal taxation to corporate taxation creates both opportunities and complications for medical professionals.
Timing Differences
Corporation tax is paid nine months and one day after your company's year-end, not through PAYE like employed doctors. This creates cash flow advantages but requires discipline to set aside funds.
Profit Extraction Options
Once your practice pays GP corporation tax, you have several ways to extract the remaining profits:
- Salary: Subject to income tax and National Insurance but deductible for corporation tax
- Dividends: Taxed at dividend rates with no National Insurance
- Pension contributions: Tax-efficient but subject to annual allowance limits
Many GP practices use a low salary (typically £12,570 to maximise the personal allowance) combined with dividends for tax efficiency.
Medical Professional Expenses and Corporation Tax
Incorporated GP practices can claim corporation tax relief on a wide range of professional expenses:
- GMC registration and revalidation costs
- Professional indemnity insurance (MDU/MPS)
- BMA membership fees
- Continuing professional development courses
- Medical journals and publications
- Practice equipment and supplies
These expenses reduce your taxable profit, directly lowering your GP corporation tax liability. However, expenses must be "wholly and exclusively" for business purposes.
NHS Pension Considerations for Incorporated GPs
Incorporation affects your NHS pension arrangements significantly. As a company director, you're not automatically entitled to NHS pension membership.
Many incorporated GPs maintain NHS pension eligibility through their salary, but this requires careful planning to ensure contributions qualify. The annual allowance (£60,000 for most doctors, potentially tapered for high earners) applies to total pension growth across all schemes.
Corporation Tax Relief on Pension Contributions
Your company can make pension contributions on your behalf, receiving full corporation tax relief. However, these contributions count towards your annual allowance and must not exceed your relevant UK earnings.
Planning Strategies to Minimise GP Corporation Tax
Several legitimate strategies can help reduce your corporation tax liability while maintaining compliance.
Timing of Income and Expenses
Unlike NHS employees who have little control over income timing, incorporated GPs can influence when profits are recognised. Consider:
- Delaying invoicing near year-end to defer income
- Accelerating equipment purchases to increase deductions
- Making pension contributions before year-end
Capital Allowances
Medical equipment purchases may qualify for capital allowances, including the annual investment allowance (currently £1 million). This can provide immediate tax relief rather than spreading costs over several years.
Research and Development Relief
GP practices involved in clinical research may qualify for enhanced corporation tax relief. This specialized area requires expert advice but can significantly reduce GP corporation tax for qualifying activities.
Common GP Corporation Tax Mistakes
Several errors frequently increase corporation tax liabilities for medical professionals:
- Poor record keeping: Missing expense claims due to inadequate documentation
- Personal vs business expenses: Claiming inappropriate personal costs
- Timing errors: Misunderstanding when income and expenses are recognised
- Dividend vs salary mistakes: Sub-optimal profit extraction strategies
These mistakes often arise because medical training doesn't cover tax planning. Working with specialists familiar with medical practice taxation is typically cost-effective.
Filing Requirements and Deadlines
Incorporated GP practices must file annual corporation tax returns (CT600) and pay any tax due. Key deadlines include:
- Corporation tax return: 12 months after year-end
- Tax payment: 9 months and 1 day after year-end
- Quarterly payments: Required for large companies (rare for GP practices)
Late filing or payment triggers automatic penalties, starting at £100 for late returns and interest on overdue tax.
When to Seek Professional Help
Given the complexity of GP corporation tax and its interaction with personal tax, NHS pensions, and medical professional requirements, most incorporated practices benefit from professional support.
Consider specialist advice if you're:
- Considering incorporation for your practice
- Struggling with optimal profit extraction strategies
- Dealing with complex expense claims
- Planning significant equipment investments
- Managing multiple income sources (NHS and private)
At Medical Accounts, we specialise in helping UK medical professionals navigate corporation tax efficiently. Our services are designed specifically for GP practices and other medical professionals operating through limited companies.
If you need help with your GP corporation tax planning or have questions about incorporation, please contact us for expert guidance tailored to medical professionals.