Category: PI comparison · Reviewed by Chrissie Anderson, Client Executive · Last reviewed May 2026
Aviva and RSA are two of the largest UK composite insurers, and both write professional indemnity (PI) as one of many commercial lines within wider portfolios. Buyers comparing the two are typically looking at PI within a broader commercial insurance programme that may also include public liability, employers’ liability, property, motor and management liability. The way each insurer structures its PI within that wider book matters as much as the PI wording itself.
This guide compares Aviva and RSA PI neutrally, on the dimensions that typically matter to buyers and brokers. It does not rank one above the other and does not recommend either. It sets out what to expect from each, where their offerings often differ, and what questions to ask of a quotation.
This article does not rank Aviva and RSA, and it does not recommend one over the other. Insurer appetite, wording, capacity and product structure all change over time, and the only definitive position is the policy schedule, the IPID and the current wording at the time of placement.
What the article does provide is a structured way to compare two composite insurers writing UK PI, so buyers and their brokers can ask the right questions of each quotation.
Composite insurers differ from specialist PI markets in several practical ways. PI within a composite book sits alongside many other commercial lines, which affects how the placement is structured, how cross-line questions are handled, and how renewal conversations proceed. None of this is inherently better or worse than a specialist PI placement — it suits different buyer profiles.
Three layers drive real differences between PI markets: the wording (trigger, defence costs, exclusions, retroactive position); the appetite of the underwriter for the specific profession; and the claims-handling approach. With composite insurers, a fourth layer matters too: how PI interacts with the rest of the commercial programme. None of this is visible from price alone. Policyholders should review their schedule and wording carefully, and applicants should check the IPID and current terms at the time of placement.
PI policies respond on either a civil-liability or a narrower negligence basis. Both Aviva and RSA publicly market civil-liability style PI in many of their wordings, but the precise clause varies. Confirm the trigger in the wording offered.
Both structures appear in the UK PI market and across composite-insurer PI products. Confirm which applies.
Defence costs may sit inside the limit or in addition. The treatment varies by product variant and is commercially significant.
Continuity of retroactive date at renewal or switch is critical. Confirm at quotation whether the prior retro will be honoured.
Run-off cover continues to respond to claims arising from past work after a firm winds down. Availability, length and cost vary.
Composite insurers commonly offer PI both as a standalone product and as a section within a wider commercial combined policy. The commercial combined approach can simplify administration where multiple lines are needed, but attaches PI to broader terms that affect both lines.
Both Aviva and RSA write across a broad range of UK commercial sectors. Specific PI appetite for a profession varies by underwriter and by product variant.
Aviva distributes commercial business via brokers, and also has a direct channel for some SME commercial products. RSA’s UK commercial book is broker-distributed. The PI placement route depends on the specific product variant.
A composite insurer typically allows multiple commercial lines to be written together with one renewal date, one policy reference and one underwriter relationship. This is one of the practical reasons buyers consider a composite for PI rather than placing it standalone.
Aviva is a large UK composite insurer writing a wide range of commercial and personal lines. PI is one of several commercial lines Aviva writes in the UK, alongside PL, EL, property, motor and management liability. Aviva is FCA-authorised; authorisation details are on the FCA register.
Aviva writes UK commercial PI across SME and lower mid-market placements, often within a wider commercial programme. Buyers who want a single insurer relationship across multiple lines are a common buyer profile for Aviva PI; buyers who want standalone PI from a specialist may prefer a different approach. Both are valid and depend on the situation.
Aviva is publicly active across a broad range of UK commercial professions and sectors. Specific PI appetite is set at underwriting and may be supported by scheme arrangements where they exist.
Aviva publicly markets civil-liability style PI in many of its wordings, with the usual definitions, conditions and exclusions. Where PI is included in a commercial combined product, the precise feature set depends on the product variant.
Confirm the trigger wording, the limit basis, defence-costs position, retroactive date, run-off availability, whether the placement is standalone or sits within a combined product, and how other lines (if any) interact with the PI section.
RSA is a large UK composite insurer with a substantial commercial book covering PI, PL, EL, property, motor and other lines. RSA distributes UK commercial business via brokers and is FCA-authorised; authorisation details are on the FCA register.
RSA writes UK commercial PI across SME and lower mid-market placements, with cross-line opportunities for buyers who use RSA for other commercial cover. Buyers who want a single composite relationship across multiple lines are a common buyer profile.
RSA is publicly active across a broad range of UK commercial professions and sectors. Specific PI appetite is set at underwriting and may be supported by scheme arrangements where they exist.
RSA publicly markets civil-liability style PI in many of its wordings, with the usual definitions, conditions and exclusions found in UK PI. The precise feature set depends on the product variant and whether the placement is standalone or part of a combined product.
Confirm the trigger wording, the limit basis, defence-costs position, retroactive date, run-off availability, whether the placement is standalone or sits within a combined product, and how other lines (if any) interact with the PI section.
| Dimension | Aviva typical position | RSA typical position | What to ask |
|---|---|---|---|
| Structure | Large composite, PI within wider commercial portfolio | Large composite, PI within wider commercial portfolio | Standalone PI or part of a combined product? |
| Distribution channel | Broker + direct for some SME products | Broker-distributed for commercial PI | Which channel is the quotation coming through? |
| Trigger wording | Civil-liability commonly marketed | Civil-liability commonly marketed | Confirm the exact trigger in the wording offered |
| Aggregation basis | Varies by product | Varies by product | Aggregate or each-and-every for this quotation? |
| Defence costs | Varies by product | Varies by product | Inside or in addition to the limit? |
| Retroactive date | Negotiable subject to underwriting | Negotiable subject to underwriting | Will prior retro be honoured? |
| Cross-line opportunity | PL, EL, property and others available alongside | PL, EL, property and others available alongside | Is a combined commercial approach being considered? |
| Sector appetite | Broad commercial professions | Broad commercial professions | Is the specific profession in current appetite? |
| Limit bands typically seen | SME-to-mid-market | SME-to-mid-market | What is the capacity for this risk? |
“Varies by product” is a common honest answer because both insurers offer multiple PI variants.
Aviva and RSA are most often considered together in commercial PI placements where the buyer is already evaluating composite insurers for multiple lines. Buyers comparing a combined commercial programme (PI, PL, EL, property and others) will often see Aviva and RSA quoted side by side. Brokers building a multi-line programme will commonly approach both markets to see which composite structure aligns best with the buyer’s mix of lines.
For SME and lower mid-market buyers with a broad commercial insurance footprint, both insurers are routinely approached. For buyers whose primary need is standalone PI without other commercial lines, a specialist PI market may also feature in the comparison — that is a separate question outside the scope of this guide.
Distribution structure is one practical difference. Aviva has both broker and (for some SME products) direct channels; RSA’s UK commercial PI is broker-distributed. Which route applies depends on the specific product variant being quoted.
Sector appetite is another area where differences appear, particularly at the edges of the SME book and at the start of the mid-market. Both insurers write across many professions, but specific live appetite is best confirmed by a broker in dialogue with both underwriting teams at the time of placement.
The cross-sell question is a third area. Both insurers offer multiple commercial lines, so a buyer can build a combined programme with either. The specific cross-line opportunities — for example, whether a common excess applies, whether a single renewal date is convenient, whether a single account manager is provided — vary by broker arrangement and product variant.
If you are a buyer with a broad commercial insurance programme spanning multiple lines and you value a single composite relationship, either Aviva or RSA may align with your needs depending on which underwriting team is in current appetite for your profession and what cross-line terms are available. If you are a buyer whose primary need is a focused PI placement and you do not require other commercial lines from the same insurer, a different conversation — including specialist PI markets — may be more relevant. Both Aviva and RSA can write standalone PI, but the cross-sell context is often part of the reason a buyer chooses a composite.
A PI broker can request comparable quotations from Aviva and RSA, present wording differences side by side, and advise on whether a combined commercial approach or a standalone PI placement is administratively cleaner for the specific buyer. The broker can also coordinate quotations on related lines (PL, EL, property) to allow a multi-line view of the composite proposition. Apex Insurance Brokers has access to multiple PI markets, including both Aviva and RSA, and presents differences neutrally so that buyers can make their own decision. We do not take a position on broker vs direct as a category — that decision depends on the buyer’s circumstances.
Are Aviva and RSA both regulated to write PI in the UK? Both are FCA-authorised UK composite insurers. Current authorisation status can be checked on the FCA register before placement.
Is one of them cheaper than the other? Price depends on profession, fee income, activities declared, claims history, limit, excess and wording. Comparing premiums alone misses wording differences that affect cover. A like-for-like comparison should be on equivalent terms.
Can I get PI as part of a wider commercial combined policy from either? Both insurers offer commercial combined products that can include PI alongside other lines, subject to product variant and underwriting. Whether a combined approach is appropriate depends on the buyer’s mix of lines.
Do both offer standalone PI? Both write standalone PI as well as PI within combined products. The choice depends on the buyer’s circumstances and the broker’s approach to the placement.
Do both offer run-off cover? Both publicly offer run-off subject to underwriting. Length and cost vary and should be confirmed at the time of placement or at the trigger event.
Does my professional body require either insurer? Most UK professional bodies do not specify a particular insurer. They set minimum cover requirements such as limit, wording features and run-off. Confirm body-specific requirements against the policy schedule.
Is a composite insurer suitable for higher PI limits? Both write across SME and lower mid-market limit bands. For larger limits, composite capacity may need to be combined with other markets in an excess layer arrangement. A broker can advise on building a programme above a certain limit.
How often should I review my PI placement? PI is typically reviewed annually at renewal. Material changes during the year — new services, new sectors, acquisitions, claims activity — should prompt an interim review with your broker.
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About Apex Insurance Brokers — Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority, FCA firm reference 724952. Registered in England and Wales, Companies House 07014570. Last reviewed: May 2026.
Note on accuracy: insurer policy wordings, appetite, capacity and distribution arrangements change over time. The descriptions in this guide reflect publicly available materials and broker-market context as understood at the time of writing in May 2026. Always confirm current policy terms with the policy schedule, IPID and current wording before relying on them for placement decisions.
Apex Insurance Brokers serves UK professional services firms and commercial businesses. Call 0117 325 0027, email hello@apexinsurancebrokers.co.uk, or request a quotation.
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