PII is the largest single regulatory cost for most UK law firms. The SRA Minimum Terms and Conditions set the floor on cover; the open market sets the price; the October renewal cycle dominates law firm cash planning. Premiums are tax-deductible, which is the only good news in an otherwise expensive obligation.
This guide is the practical picture: what the MTC requires, why qualifying insurers matter, how premiums are priced, the tax treatment of premium and excess payments, what happens at renewal, run-off mechanics on cessation, and the claim-handling process when something does go wrong.
The Minimum Terms and Conditions
The SRA Minimum Terms and Conditions ("MTC") define the floor on what any PII policy covering an SRA-regulated firm must contain. Every qualifying insurer's policy must meet the MTC; many policies offer cover above the MTC for additional premium.
Headline MTC requirements
- Minimum cover: £2m per claim for unincorporated firms (sole practitioner, partnership, LLP); £3m for incorporated firms; no aggregate limit at the £2m level
- Run-off cover: minimum 6 years post-cessation
- Civil liability: cover for civil liability arising from the firm's legal practice
- Defence costs: cover for defence costs in addition to the indemnity limit (in most policies)
- Innocent insureds: cover for partners and members not involved in the act giving rise to the claim
- No territorial limit on the location of the act, suit, or judgement (subject to specific policy exclusions)
Qualifying insurers
Only insurers approved by the SRA can write PII for SRA-regulated firms. The qualifying insurer list changes over time; some insurers have entered the market, some have exited (the most consequential exit being Quinn in 2010). The current list is published on the SRA website.
Why this matters: the open market for solicitor PII is narrower than for general professional indemnity. Insurer choice is more limited; pricing is sometimes idiosyncratic; broker relationships matter more than in many other classes.
Premium pricing in practice
The key variables
- Gross fee income: top-line driver; premium typically expressed as a percentage of gross fees
- Practice area mix: conveyancing-heavy firms pay more; pure private client and corporate firms pay less
- Claims history: the largest individual variable; a single significant claim can double next year's premium
- Cover limit and excess: higher cover = higher premium; higher self-insured excess = lower premium
- Firm size: per-partner pricing can apply
- Risk profile: AML controls, conflict checking, file management, supervision quality all affect underwriting
Typical premium ranges (2025/26 indicative)
- Small private client firm (£500k turnover, no high-risk work): £4,000-£12,000
- Mid-size mixed firm (£2m turnover, mixed conveyancing/commercial): £15,000-£40,000
- Conveyancing-heavy firm (£3m turnover, 70% residential conveyancing): £40,000-£100,000+
- City commercial firm (£20m turnover, large commercial litigation): £200,000-£500,000+
These are illustrative. Individual quotes depend on the underwriter's view of the specific firm's risk.
Tax treatment of premiums and excess
Premium
PII premium is an allowable trade expense for the firm. For a partnership/LLP, it reduces the partnership profit allocated to members. For a limited company, it reduces taxable profit before corporation tax. For a sole practitioner, it reduces taxable income before income tax + NI.
For VAT-registered firms, PII premium is exempt from VAT (insurance is generally VAT-exempt under VATA 1994), so no input VAT to reclaim.
Self-insured excess and deductible amounts
The self-insured excess paid by the firm when settling a claim is also an allowable trade expense. Same treatment as the premium: reduces taxable profit.
Defence costs reimbursed by insurer
Where the insurer reimburses defence costs the firm has paid, the reimbursement is a non-taxable receipt (it's returning the firm to its pre-cost position). The firm should reduce the deductible expense by the reimbursement amount.
Notifications and reserves
Claim notifications and reserves themselves don't have direct tax consequences until a payment is made. Bookkeeping notes that mention "potential PII claim £X" are not tax-deductible until cost is actually incurred.
The October renewal cycle
Most law firm PII renews on 1 October. The cycle has roots in the historic Solicitors Indemnity Fund and persists today. The renewal preparation timeline:
April-June — preparation
- Renewal information form completed (firm financial data, claims history, practice area mix)
- Broker submits to qualifying insurers for indicative quotes
- Indicative quotes received and reviewed; market position assessed
July-August — negotiation
- Final quotes from insurers
- Cover terms negotiated (limit, excess, specific exclusions, extensions)
- Preferred insurer selected
- Premium financing arranged if needed (most insurers offer 6-9 month payment plans at modest interest)
September — binding
- Final terms agreed and bound
- Policy documentation issued
- SRA notification of any material change in cover
October — renewal date
- New policy incepts at 00:01 on 1 October
- First premium instalment paid
- Certificates of cover issued
When renewal goes wrong
Renewal failure is rare but consequential. The escalation path:
Extended Indemnity Period (EIP)
If renewal isn't completed by 1 October, the firm enters a 30-day EIP. During EIP the firm continues to trade under residual cover from the prior insurer or via SRA mechanisms. The firm must work urgently to secure renewal.
Cessation Period
If EIP expires without renewal, the firm enters a 60-day Cessation Period. During Cessation the firm must wind down its practice. New instructions cannot be accepted. Existing matters must be transferred to other firms or completed in the available window.
Causes of renewal failure
- Major claim mid-year that causes insurers to decline renewal
- Material change in firm risk profile (significant conveyancing volume increase)
- Firm management changes that concern underwriters
- Loss of qualifying insurer relationships
- Inadequate broker engagement / late renewal preparation
The recovery path
Most renewal failures are solvable with broker help and timely action. Specialist brokers (those with strong solicitor PII books) can often place difficult risks where mainstream brokers can't. Cost is invariably higher; some firms accept materially worse terms (higher excess, sub-£2m to top-up to MTC level, additional exclusions) to secure renewal at all.
Run-off cover
SRA requires at least 6 years of run-off cover after a firm ceases or after a specific entity ceases within a deal. The 6-year period reflects typical limitation periods for negligence claims.
Run-off premium
Typically 1.5x to 3x the final annual premium, paid upfront. For a firm with £40,000 annual premium, run-off might be £80,000-£120,000. The cost reflects the insurer's risk of claims emerging over a 6-year tail without further premium income.
When run-off is triggered
- Firm cessation (closure, retirement of sole practitioner, partnership dissolution)
- Asset sale within a merger or acquisition where the original entity ceases
- Conversion from one entity type to another (occasionally — depends on whether the new entity assumes liability for the old)
Tax treatment of run-off
Run-off premium is deductible from the firm's final-year trading profit (or for partnerships/LLPs, allocated to the final-year partners). For a retiring sole practitioner, the run-off premium can produce a trading loss in the cessation year — terminal loss relief may then apply, allowing the loss to be carried back to earlier years.
Claim handling: what to do when something happens
Notification
The MTC requires notification of any circumstance that may give rise to a claim. The threshold is low — most claims start as "potentially worrying circumstances" rather than fully-formed claims. Notify the insurer in writing inside the firm's notification protocol (typically days, not weeks, from awareness).
Reservation of rights
The insurer typically responds with a reservation-of-rights letter acknowledging the notification and pending its position on coverage. This is normal — it doesn't mean the insurer is declining the claim, just that they're not committing to cover until they understand the facts.
Investigation
The insurer appoints panel solicitors (firms specialising in defending other solicitors) to investigate the claim. The firm cooperates fully. Internal communications about the matter should be treated as discoverable; legal privilege over them is uncertain.
Settlement or defence
If the claim is meritorious, the insurer typically authorises settlement. The firm contributes the self-insured excess; the insurer covers the balance up to policy limit. If the claim is defendable, the panel solicitors run the defence; defence costs are typically covered above the indemnity limit.
Post-claim premium impact
A claim's impact on next year's premium depends on size, cause, and the insurer's overall renewal appetite for the firm. A single moderate claim may add 20-50% to the renewal premium. A serious claim may double or triple it, or in worst cases lead to decline at renewal.
Cost optimisation: what actually works
- Strong AML and conflict controls: documented, audited, evidence retained. Most insurers reward demonstrably good controls with better pricing.
- Supervision quality: file management, knowledge sharing, second-pair-of-eyes on high-risk matters. Visible in claims experience over time.
- Claim management discipline: notify promptly, cooperate fully, don't argue with insurer's panel solicitors. A claim handled well has minor premium impact; a claim handled badly has major impact.
- Broker selection: the right specialist broker for your firm size and practice area mix matters more than firms typically realise. A specialist broker often delivers a 10-25% better deal than a generalist.
- Excess discipline: a higher excess saves premium; a higher excess also means more cost when a claim arises. Model both scenarios on your claims expectation, not your wishful claims expectation.
What we'd do if you brought us in
We don't broker PII; that's the specialist broker's job. We work alongside the broker on:
- Renewal information preparation (financial data, projections, mix analysis)
- Tax treatment of premiums, excess, and claim payments
- Cash flow planning around the October renewal cycle and payment terms
- Run-off cover modelling at firm cessation or merger
- Premium financing review (most insurers offer 6-9 month payment plans)
If you're approaching renewal and want a sensible accountancy-side review alongside your broker engagement, book a scoping call below.