Is PII Tax Deductible for a Solicitor? The Short Answer

Yes. Professional indemnity insurance (PII) premiums paid by a UK solicitor or law firm are an allowable expense for tax purposes. Whether you are a sole practitioner, a member of an LLP, or a director of a limited company, the cost of your PII cover is deducted from your taxable profits before tax is calculated.

This applies to all forms of PII that a solicitor is required to hold under the SRA Minimum Terms and Conditions (MTC). It also applies to voluntary top-up cover, run-off policies, and excess layer insurance. The key principle is that PII is a necessary cost of carrying on a legal practice, so HMRC treats it as a normal trading expense.

For a sole practitioner or partnership, the premium is deducted from the firm's profit before each partner's share is allocated. For an LLP, the same principle applies: the premium is a deduction from the LLP's profit before members' profit shares are calculated. For a limited company solicitor, the premium is deducted from the company's profits before corporation tax is charged.

There is no special tax rule that restricts PII deductibility. It is not a capital expense. It is not a personal expense. It is a straightforward revenue cost of running a law firm. If you are a solicitor paying for your own PII as a locum or consultant, the same logic applies: the premium is deductible against your professional income.

What Types of PII Cover Are Deductible?

Most solicitors are familiar with the SRA's MTC cover. This is the minimum level of PII that every SRA-regulated firm must hold. The MTC requires a minimum cover of £2 million per claim (or £3 million for sole practitioners and partnerships). The premium for this cover is fully deductible.

Beyond the MTC, many firms purchase additional cover. This includes:

  • Top-up layers that increase the aggregate limit above the MTC minimum.
  • Run-off cover that protects a firm after it closes or after a partner retires.
  • Excess layer insurance that covers claims above the primary layer.
  • Cyber liability extensions added to the PII policy.

All of these are allowable expenses. The test is simple: is the cost incurred wholly and exclusively for the purposes of the trade? For a solicitor, PII is a regulatory requirement. Without it, you cannot practise. The cost is therefore wholly and exclusively for the trade.

There is one nuance. If you have a policy that includes personal cover (for example, cover for activities outside your legal practice, such as acting as a trustee in a personal capacity), you must apportion the premium. The personal element is not deductible. In practice, most solicitors' PII policies cover only professional activities, so this is rarely an issue.

How Is PII Treated in Partnership and LLP Accounts?

For a traditional partnership or an LLP, the PII premium is a deduction from the firm's profit before allocation to partners. This means that the cost is shared among all partners in proportion to their profit shares. It does not matter whether the firm pays the premium in one lump sum or by monthly instalments. The deduction is taken in the accounting period to which the premium relates.

For example, suppose a four-partner firm pays an annual PII premium of £40,000. The firm's profit before PII is £400,000. After deducting the premium, the profit is £360,000. Each partner's share is then calculated from that reduced figure. The partners do not claim the premium individually on their personal tax returns. The deduction happens at the firm level.

This is straightforward. But there is a common mistake. Some solicitors think that because they are personally liable for claims under the MTC, they can claim the premium personally. That is wrong. The firm pays the premium. The firm deducts it. The partners benefit through lower profit shares.

If you are a locum solicitor or a consultant who pays your own PII, you claim the premium as a deduction on your self-assessment tax return. You enter it under "allowable business expenses" on the self-employment pages. Keep the invoice and proof of payment.

Run-Off Cover: A Special Case

Run-off cover is PII that protects a firm after it has ceased to trade. The SRA requires firms to maintain run-off cover for six years after closure. This is a significant cost for retiring partners or firms that are winding up.

Is run-off cover tax deductible? Yes, but the timing matters. If the firm pays the run-off premium before it closes, the deduction is taken in the final accounting period. If the firm has already closed and the former partners pay the premium personally, each partner can claim their share as a deduction on their personal tax return.

HMRC accepts that run-off cover is a trading expense of the former firm. The key is to ensure that the payment is made by the correct entity. If the firm pays, the firm deducts. If the partners pay after dissolution, each partner deducts their share.

There is a trap. If the firm closes and the partners do not keep a bank account open to pay the run-off premiums, they may pay from personal funds. In that case, they should claim the deduction on their self-assessment returns. They should also keep a clear record showing that the payment relates to the former firm's PII.

PII for Locum and Consultant Solicitors

Locum solicitors and consultant solicitors often work through a personal service company (PSC) or as sole traders. In either case, the PII premium is deductible.

If you are a sole trader locum, you claim the premium on your self-assessment return. If you work through a PSC, the company claims the deduction against its corporation tax. The key is that the PII must be in your name (or your company's name) and must cover your professional activities.

Some locum solicitors make the mistake of relying on the hiring firm's PII. That is risky. The hiring firm's policy may not cover you if a claim arises from your own negligence. You should have your own PII. And if you do, the premium is deductible.

For a locum solicitor paying their own PII, the cost is typically between £1,500 and £5,000 per year, depending on the practice area and claims history. That is a direct reduction in taxable income. It is worth getting right.

Common Mistakes Solicitors Make with PII and Tax

Despite the straightforward rules, we see several recurring errors in our work with law firms.

Mistake 1: Treating PII as a personal expense. Some solicitors pay their PII from a personal bank account and then forget to claim it. If you are a partner, the firm should pay. If you are a locum, you can pay personally and claim. But you must claim.

Mistake 2: Not apportioning mixed-use policies. If your PII policy covers both professional and personal activities, you must apportion the premium. HMRC can disallow the personal element. In practice, most solicitors' policies are purely professional, but check your policy wording.

Mistake 3: Confusing PII with other insurance. Public liability insurance, employer's liability insurance, and office insurance are also deductible. But they are separate policies. Do not lump them together incorrectly on your tax return. Each has its own treatment, though all are generally deductible.

Mistake 4: Forgetting run-off cover. Retiring partners often forget to claim run-off premiums paid after the firm closes. If you pay a run-off premium in a tax year after you have retired, you can claim it against your other income for that year. It is not a capital loss. It is a trading expense of the former firm.

Mistake 5: Not keeping records. HMRC can ask to see proof of payment. Keep the invoice, the insurance certificate, and the bank statement showing the payment. For a firm, keep these in the accounting records. For a locum, keep them with your tax papers.

PII and VAT: A Separate Question

PII premiums are generally exempt from VAT. Insurance premiums are exempt supplies under UK VAT law. This means that if your firm is VAT-registered, you cannot reclaim VAT on the PII premium. The premium is shown on the invoice as a net amount with no VAT.

This is different from most other business expenses, which carry VAT at 20%. Do not try to reclaim VAT on your PII premium. Your accountant will know this, but it is worth understanding why the invoice looks different.

If you are a locum solicitor who is not VAT-registered, the VAT exemption does not affect you. You simply deduct the full premium from your income.

How to Record PII in Your Firm's Accounts

For a law firm, PII is a revenue expense. It is recorded in the profit and loss account under "insurance" or "professional indemnity insurance". If the premium covers more than one accounting period (for example, a 12-month policy paid in one lump sum), you should spread the cost over the period it covers using prepayments.

For example, if you pay a £24,000 premium on 1 October 2025 for cover from 1 October 2025 to 30 September 2026, and your accounting year ends on 31 March 2026, you should recognise six months of the cost (£12,000) in the year to 31 March 2026. The remaining £12,000 is a prepayment on the balance sheet.

This is standard accruals accounting. It ensures that your profit reflects the cost of cover for the period. If you use cash accounting for tax (available to unincorporated firms with turnover under £150,000), you can deduct the full premium in the year of payment. But most law firms use accruals accounting.

What About the SRA Accounts Rules?

The SRA Accounts Rules do not directly affect the tax treatment of PII. But there is a connection. The rules require firms to maintain adequate PII as a condition of authorisation. If you fail to hold PII, you risk regulatory action. That is a separate issue from tax.

However, the cost of complying with the SRA Accounts Rules, including the cost of the accountant's report, is also deductible. If you need help with the accountant's report or with ensuring your firm's compliance, we offer SRA Accounts Rules support.

Practical Steps for Solicitors

Here is a checklist for ensuring you handle PII correctly for tax purposes.

  • Ensure the firm pays the premium, not individual partners (unless you are a locum).
  • Keep the invoice and proof of payment in your accounting records.
  • If you are a partner, check that the firm's accounts show the PII as a deduction.
  • If you are a locum, claim the premium on your self-assessment return under allowable expenses.
  • If you pay run-off cover after the firm closes, claim it on your personal return.
  • Do not try to reclaim VAT on the premium.
  • If you have a mixed-use policy, apportion the premium.

If you are unsure about any of these points, speak to a legal-sector-specialist accountant. The rules are straightforward, but the application can vary depending on your firm's structure and your personal circumstances.

For more detailed guidance on PII and tax, see our professional indemnity tax treatment guide. If you are a partner considering your firm's structure, our partnership vs LLP guide may also be relevant.

We also offer a PII premium estimator to help you budget for this cost, and we provide COFA compliance support for firms that need help with regulatory requirements.

Finally, if you are buying or selling a law firm, PII costs are a key factor in practice valuation. Our practice valuation service can help you understand how PII affects the price.

Summary

Professional indemnity insurance is a fully tax-deductible expense for UK solicitors. The cost of MTC cover, top-up layers, run-off cover, and excess layer insurance all qualify. The deduction is taken at the firm level for partnerships and LLPs, and at the company level for limited companies. Locum solicitors claim the deduction on their personal tax returns.

The rules are simple. The common mistakes are avoidable. Keep good records, ensure the correct entity pays the premium, and claim the deduction in the right period. If in doubt, ask a specialist accountant.

For a free initial discussion about your firm's tax position, including PII treatment, contact us.