Most public discussion of accountants' professional indemnity insurance in the UK centres on the ICAEW route. The ICAEW scheme has one appointed broker, a well-known formula in Bye-law 61, and a large body of published guidance behind it. For the roughly one-in-two practising accountants in the UK who hold their qualification through a different body, the picture is less well documented and the placement route is different. This page is written for those practitioners: ACCA members in public practice, CIOT and ATT members with a practising client base, AAT licensed accountants, IFA practising certificate holders, and non-chartered accountants who fall outside the scope of the ICAEW scheme.
You are likely to be reading this page if you are one of the following. An ACCA member holding an ACCA practising certificate and providing regulated or unregulated services to fee-paying clients. A member in practice of the CIOT or ATT — a chartered tax adviser or taxation technician whose day-to-day work is tax advice, compliance and representation. An AAT licensed member operating as a sole trader, partnership or limited company under the AAT Licensed Accountant scheme. An IFA member holding a practising certificate from the Institute of Financial Accountants. A CIMA member who has stepped from an in-house finance role into practice and needs to think about cover. Or a non-chartered accountant with no professional-body affiliation but a live client base and a fee income to protect.
What links these cohorts is that none of them place cover through the ICAEW scheme route. The scheme is only open to ICAEW-regulated firms. Every other route is an open-market placement, and the mechanics of what "adequate" means vary meaningfully from body to body.
UK accountancy is a multi-body profession. The bodies most relevant to PI placement are these:
ICAEW — the Institute of Chartered Accountants in England and Wales. Sets the terms of chartered accountant regulation south of the border and covers a large slice of the profession. Bye-law 61 sets the PI standard. The ICAEW route is not the subject of this page — see our separate explanation of Bye-law 61.
ACCA — the Association of Chartered Certified Accountants. Global body with a substantial UK practising membership. ACCA members in public practice are subject to ACCA's Professional Indemnity Insurance Regulations.
CIOT — the Chartered Institute of Taxation. Represents chartered tax advisers. Many CIOT members are also members of ICAEW or ACCA; a meaningful minority hold CIOT alone. CIOT has its own PI regulations for members in practice.
ATT — the Association of Taxation Technicians. The sister body to CIOT, focused on the technician-grade tax practitioner. Uses the same PI regulation framework as CIOT.
AAT — the Association of Accounting Technicians. Operates the AAT Licensed Accountant scheme, which enables members to offer accountancy services to the public with a specified scope of work.
IFA — the Institute of Financial Accountants. Grants practising certificates and regulates public practice by its members under Public Practice Regulations.
CIMA — the Chartered Institute of Management Accountants. Most CIMA members work in industry; a small number hold Members in Practice status and offer services to the public. Where CIMA members are in practice, they are subject to CIMA's Members in Practice regulations, which include a PI requirement.
Each body sets its own minimum limit and its own supporting rules. The mechanics of these are what a specialist broker needs to know cold; the summaries that follow reflect the regulations as published by each body at the date of this review.
ACCA rewrote its PII Regulations effective 1 September 2023, with transitional arrangements requiring all policies to comply from 1 January 2025. The current framework works on two bands set by firm total income.
For firms with total income of less than £600,000 in the preceding year, the minimum PII limit is the greater of two figures: two and a half times the firm's relevant total income; and £100,000. For firms with total income of £600,000 or more, the minimum limit is £1.5 million on any one claim.
The cover has to be effected on an any-one-claim basis and must remain in force for as long as the practising certificate is held. On ceasing practice, ACCA requires the member to arrange run-off cover for at least six years. The regulations apply to any ACCA member holding an ACCA practising certificate and engaged in public practice.
CIOT and ATT operate a common PI framework. Every member in practice must ensure that PI is effected and maintained in respect of their firm. The cover must be on an each-and-every-claim basis and, as a minimum, on a costs-inclusive basis.
The minimum limit is based on fees raised in the preceding financial year, subject to a floor of £100,000 for a sole practitioner or £200,000 in any other case, and a maximum requirement of £1 million. The CIOT and ATT both recommend that members carry £1 million as a matter of good practice regardless of firm size.
Excess is capped at £30,000 per principal — a figure that was raised from £20,000 to bring it into line with ICAEW so that dual-membership firms can hold a single policy. Subcontractors are treated as members in practice in their own right and require PI, though an exemption is available where the contracting firm names the subcontractor on its own policy and the insurer has waived subrogation against the subcontractor.
PI is mandatory for every AAT licensed member. The minimum required cover varies by legal structure and firm income. For a sole trader, the minimum is the greater of two and a half times gross fee income or £50,000. For a partnership or a limited company, the minimum is the greater of two and a half times gross fee income or £100,000. Where a firm's gross fee income exceeds £400,000, the maximum required limit is £1 million.
Two supplementary points bear noting. First, the self-insured excess must be set at a level the licensed member is able to meet at all times — a directly stated regulatory expectation rather than a market convention. Second, any AAT licensed member permitted to carry out limited assurance engagements must ensure that the PI policy explicitly covers those engagements and the third-party claims they can attract. AAT also advises — as does every other body — that the stated minimum is a floor, not a target: a risk assessment based on client mix, service mix and claim history is expected on top.
The Institute of Financial Accountants sets its PI standard through its Public Practice Regulations, the current version of which takes effect from 1 January 2026. PI is compulsory for any IFA member who holds a practising certificate and engages in public practice, regardless of the amount of practice income. The IFA approach is banded in a manner similar to ACCA's, with the required limit rising in steps as fee income rises.
Run-off cover is required for at least six years from the date the practising firm ceases to exist. Where a member is a sole principal in a firm that closes on retirement, the six-year run-off obligation sits on the individual regardless of whether the firm is still trading.
CIMA's Members in Practice regulations apply to CIMA members who provide services to the public. These members must effect PI cover before they begin to practise. CIMA members considering a move from industry into practice should treat PI as a threshold requirement — not a nice-to-have — and expect the practising status process to include evidence of cover.
Bye-law 61 sets the ICAEW standard on a fixed formula of two and a half times fee income, subject to a stated floor and a stated cap. ACCA's regulation mirrors that structural approach for firms under £600,000 of income and then sets a hard floor of £1.5 million above that threshold.
CIOT, ATT and AAT operate on the same broad principle — a multiplier of fee income, floored at a sensible minimum and capped at £1 million — but the floors and multipliers differ. The IFA framework is banded and rises in steps rather than as a straight-line multiplier.
The compulsory-cover-market mechanism that solicitors know from the SRA Minimum Terms and Conditions is not replicated in accountancy. There is no qualifying-insurer register, no MTC-equivalent standard wording, and no assigned-risks pool. Cover is placed on an open-market basis with insurers whose wording the broker has to compare against the relevant body's regulations. A wording that satisfies AAT may not satisfy CIOT — and vice versa — because "adequate" is defined in different words in each rulebook.
The practical effect is that a specialist broker acting for a dual- or triple-qualified firm has to hold the regulations of every relevant body in mind at once, and check the placed wording against each. That is the substance of the work.
ICAEW-regulated firms place PI through the ICAEW scheme, which operates via a single appointed broker. That is a market fact and a matter of straightforward record. The scheme is not open to firms regulated by any other body.
For non-ICAEW accountants, PI is placed on the open market. A specialist broker with regulator-body knowledge is able to sit the wording of a proposed placement against the body's rulebook and identify gaps or over-cover before binding. Because the minimum-cover formulas vary between bodies, and because dual-membership firms are common, the value of the placement lies as much in the wording review as in the premium.
Insurers active in this segment of the market include Aviva, RSA, Hiscox, AXA, Zurich, Markel, HDI, QBE and a number of Lloyd's syndicates. Not all of them write every profession or every fee band, and appetite changes across the underwriting cycle. Comparing across a shortlist of insurers with current appetite for the profession and the firm's income band is the reason the open-market route exists.
Frequency and severity vary widely across the different service mixes an accountancy firm can offer, but a handful of exposure areas produce the majority of losses across the profession.
Tax advice. The largest single category of accountants' PI claims by frequency and, in many cases, by severity. HMRC penalty exposure attaches to the taxpayer, but where a defensible argument exists that professional advice caused or contributed to the penalty, a claim against the adviser can follow. Recent case law on adviser liability for tax outcomes has strengthened the picture that tax advice work should be underwritten with the specific service in mind.
Audit and assurance. Higher severity, narrower frequency. Where a firm is licensed to perform audit or limited assurance engagements, the wording of the PI policy must reflect that expressly. Audit failures involving pension schemes, charities or listed subsidiaries can generate very high individual claims.
Insolvency-adjacent work. Advisory work provided to a company in the run-up to insolvency can generate creditor or shareholder claims that surface once the company enters an insolvency procedure. Wrongful trading and misfeasance actions are not accountants' claims in themselves but can name the accountant as party.
Tax scheme facilitation. Accountants who introduced clients to structured tax planning arrangements later found to be ineffective face a claim exposure that has been material in the market for the past decade. Retrospective HMRC action can extend the exposure many years past the original advice.
Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority under firm reference number 724952. Matthew Bartlett, the firm's director, holds SMF3 (Executive Director), SMF16 (Compliance Oversight) and SMF17 (MLRO) approvals.
Apex places cover for members of ACCA, CIOT, ATT, AAT, IFA, CIMA and non-chartered practising accountants. Placements are made on an open-market basis across insurers with current appetite for the profession. The firm's published guidance covers the mechanics of every relevant body's PI regulation, so that a firm placing cover through Apex is dealing with a broker that has read the same rulebook the firm is subject to.
Can non-ICAEW accountants get PI insurance? Yes. The ICAEW scheme is not the only route to cover — it is one route, open to ICAEW-regulated firms. Every other accountancy body's members place cover on the open market, and there is a well-populated insurer market for the profession. The placement mechanics differ from the scheme; the availability of cover does not.
What's the minimum PI for ACCA members? Under the ACCA PII Regulations, firms with total income below £600,000 must carry the greater of two and a half times relevant total income or £100,000. Firms with total income of £600,000 or more must carry at least £1.5 million on any one claim. Six years of run-off is required on ceasing practice.
Do ATT and CIOT members need PI? Yes. Every CIOT or ATT member in practice is required to hold PI on an each-and-every-claim, costs-inclusive basis. The minimum limit is fee-based, floored at £100,000 for a sole practitioner or £200,000 in any other case, capped at £1 million. Both bodies recommend that members carry £1 million as a matter of good practice.
How much PI cover does an accountant need? The regulatory minimum is a floor, not a target. The drivers of an adequacy assessment are fee income (the multiplier used by most bodies), service mix (audit, tax planning and insolvency-adjacent work raise the exposure), client size (large corporate clients drive higher potential losses), claim history (a record of paid claims will move an insurer to require a higher self-insured excess or a higher limit) and contractual commitments the firm has made to specific clients about the cover it will maintain.
What if I hold multiple qualifications — for example ACCA and CIOT? Both bodies' regulations apply to the firm and to every relevant service line. The broker placing the cover has to hold both rulebooks in mind and ensure the wording satisfies each. The 2023 alignment of the CIOT and ATT excess cap with ICAEW at £30,000 per principal was made in part to reduce the friction faced by dual-body firms.
Do I need run-off cover on retirement? Yes. ACCA and IFA both require six years of run-off after ceasing practice. AAT and CIOT / ATT expect the licensed or member-in-practice status to be relinquished only when arrangements for the tail have been documented. Because most PI policies are claims-made rather than losses-occurring, the absence of run-off leaves post-retirement claims uninsured.
For deeper coverage of related topics you can read our ultimate UK accountants' PI guide 2026, our ACCA versus ICAEW PI insurance comparison, our detailed Bye-law 61 explainer, our note on directly-authorised versus appointed-representative PI brokers, and our overview of the professions that direct writers cannot cover.
Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority. Firm reference number 724952.