Solicitors' PI Top-Up Cover: Insuring Above the SRA Minimum

Reviewed by Matthew Bartlett, Director, Apex Insurance Brokers Limited · Last reviewed 2026-08-10

The compulsory layer of solicitors' professional indemnity is one of the most heavily regulated insurance products in the UK. Everything above it is one of the least. That asymmetry is the single most important thing to understand about topping up: the moment you buy limit above the SRA minimum, you leave a prescribed, policyholder-friendly regime and enter an ordinary commercial market where the wording says what it says. For a firm buying £5m, £10m or more of total limit, the judgement calls sit almost entirely in the excess layers.

Is the SRA minimum actually enough for our firm?

For many firms, no — and the profession's buying behaviour reflects that. The £2m/£3m minimum was set as a baseline for the whole regulated population, from sole practitioners doing private client work to multi-partner commercial firms. It takes no account of what your firm actually does.

The starting point is the size of the largest matter that could plausibly go wrong, not your average file. A residential conveyancing practice acting on £1.5m purchases can face a claim approaching the full transaction value if a title or fraud issue emerges. A firm advising on a corporate disposal, a development site assembly, a pension transfer within a trust, or a high-value estate can face claims that dwarf the minimum limit. Claimant costs and interest sit on top of the underlying loss, and litigation against solicitors is well funded and well organised.

There is also a defensive dimension partners sometimes underweight. In a traditional partnership, liability above the insured limit lands on the partners personally. In an LLP or limited company the entity absorbs it, but an uninsured seven-figure judgment can still be terminal for the business. Top-up cover is, in substance, personal asset protection for the people reading this article — which is why the decision belongs at partner level rather than being treated as a renewal formality.

Finally, external parties increasingly set the floor for you. Lender panels, institutional clients, and counterparties on corporate and property transactions frequently stipulate PI limits well above the SRA minimum as a condition of instruction or panel membership. If your firm competes for that work, the question is not whether to top up but how far. We cover the contractual side of this in more depth in our note on what to do when a contract requires a higher PI limit.

How should we decide how much limit to carry?

There is no formula, and any broker who offers one is selling you a shortcut. The sensible inputs are: the value profile of your top matters over the last few years, not just the current year, because PI is written on a claims-made basis and today's limit responds to yesterday's work; the aggregation risk in your practice — a systemic error repeated across a book of similar files can turn many small matters into one very large claim; the limits your peers and your clients' panels expect; and the marginal cost of additional limit, which typically falls as you move up the tower because higher layers sit further from the claims activity.

Two structural points matter as much as the headline number. First, understand the basis of the limit: the MTC primary is written on an any one claim basis, but excess layers are negotiated and some are offered with aggregate limits or aggregated treatment of related claims. The difference is fundamental to how much cover you really have in a bad year — we unpack it in any one claim vs aggregate PI limits. Second, think about defence costs: on the compulsory layer these are typically payable in addition to the limit, whereas excess-layer treatment varies by wording and should be checked rather than assumed.

How does the top-up market differ from the MTC primary layer?

The compulsory layer must be written by a participating insurer on terms no less favourable than the SRA Minimum Terms and Conditions. The MTC is deliberately prescriptive and deliberately tilted towards the insured and, above all, towards claimants: broadly, it constrains insurers' ability to decline or avoid cover in ways an ordinary commercial policy would permit. The primary insurer carries obligations it cannot negotiate away, and prices accordingly.

Top-up layers sit outside that regime entirely. They are conventional commercial excess-of-loss contracts, negotiated between insurer and insured, and everything is in play: the wording, exclusions, conditions, notification provisions, the treatment of defence costs, and the basis of the limit. Several practical consequences follow.

Capacity above the primary is generally cheaper per million than the compulsory layer, because the excess insurer sits behind a heavily regulated primary and attaches above the working layer where most claims are resolved. But cheaper capacity is not identical capacity. An excess wording may contain exclusions or conditions the MTC would never permit on the primary — and many excess policies impose their own notification and claims-cooperation conditions with real teeth. It is entirely possible, with a carelessly assembled tower, to have a claim that the primary insurer must pay in full to its limit while an excess insurer declines its share on grounds unavailable to the primary. The general mechanics of layered programmes — attachment points, follow-form language, and how layers respond in sequence — are covered in our guide to excess layer PI insurance.

What should we look for in a top-up wording?

The objective is simple to state and harder to achieve: the top-up should respond whenever the primary responds, so far as the market will allow. When we review or place excess layers for law firms, these are the points that most often need attention:

• Follow-form language and its carve-outs. Many top-up policies are expressed to follow the primary, but the exceptions to that follow-form promise are where the risk lives. Every carve-out is a potential gap between layers.
• Basis of the limit and aggregation wording. Confirm whether the layer is any one claim or aggregate, and how the wording aggregates related claims — ideally consistently with the layer below, so a series of connected errors erodes the tower predictably.
• Notification provisions. Excess insurers typically require their own notification of circumstances. A matter correctly notified to the primary but not to the excess layer is a self-inflicted wound, and one we see regularly on programmes assembled from different sources over several renewals.
• Exclusions absent from the primary. Any exclusion in the excess wording that has no counterpart in the MTC narrows your effective cover for larger claims — precisely the claims the layer exists for.
• Continuity across renewals. Because PI is claims-made, switching excess insurers or wordings mid-stream needs care around circumstances already notified and the consistency of cover for prior work.

None of this argues against buying top-up cover — it argues for buying it deliberately. A tower placed as a coherent whole, with wordings read against each other, behaves very differently in a serious claim from a tower accreted layer by layer on price alone.

What happens to top-up cover when the firm closes or merges?

The MTC requires six years of run-off cover on the compulsory layer when a firm ceases without a successor practice. That protection does not automatically extend to your excess layers: run-off on top-up cover is a commercial negotiation, and whether, for how long, and on what terms an excess insurer will provide it varies considerably. A firm that carried £10m of cover while trading and drops to the compulsory minimum in run-off has made a real decision about partner exposure — often without noticing it. If succession, merger or closure is on the horizon, the excess-layer run-off position should be established before you commit, not discovered afterwards.

How should we approach the market?

The excess market for solicitors is competitive but discriminating. Underwriters respond to well-presented risks: a clear breakdown of work types, matter values, supervision and risk-management arrangements, claims history with explanation rather than bare figures, and a coherent account of why the firm is asking for the limit it wants. Presentation quality moves both price and wording — on excess layers, where everything is negotiable, it moves them more than it does on the prescribed primary.

Timing matters too. Excess layers should be marketed alongside the primary, not bolted on after the primary is bound, so that attachment, wording and insurer relationships can be aligned across the tower. And the broker's job is not finished at placement: maintaining a single notification discipline across all layers, year after year, is where much of the value of a properly managed programme is actually realised.

Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority (FRN 724952). This article is general information, not advice on a specific policy.