PI facultative reinsurance is reinsurance arranged for a single individual PI policy, negotiated separately from any treaty. Unlike a treaty — which applies automatically to a defined class — facultative reinsurance is offered to and accepted by the reinsurer on a one-off basis. It is the mechanism insurers use to extend capacity on a specific large or unusual PI risk.
What facultative reinsurance is
Facultative reinsurance is risk-by-risk reinsurance. The ceding insurer offers a defined share or layer of a specific risk; the reinsurer accepts or declines on that risk alone; the terms (rate, scope, exclusions) are negotiated for that contract.
The word “facultative” reflects the optional, case-by-case nature of the arrangement. Both parties retain the faculty to accept or reject every risk. This contrasts with treaty reinsurance, where acceptance is automatic for all risks falling within the treaty’s parameters. See PI treaty reinsurance for the comparison.
In UK PI, facultative reinsurance plays three core roles: (a) extending capacity on a large limit that the cedant’s own treaty cannot or will not cover, (b) reinsuring a non-standard risk that falls outside treaty parameters, and (c) protecting profitability on a single large risk where the cedant wants more layered protection than treaty gives.
How a PI facultative placement works
Four stages typify a facultative placement.
Risk presentation. The cedant prepares a slip describing the underlying PI risk — the insured, sector, limits, retro date, claims history, premium, wording. The slip is offered to potential reinsurers in the open reinsurance market.
Quotation and underwriting. Each reinsurer underwrites the risk independently and offers a percentage line on the slip at a quoted rate, often with proposed wording amendments. The slip eventually firms when sufficient lines have been written to complete the placement.
Contract certainty. Under the FCA’s Contract Certainty principles, the slip must be finalised in writing before inception of the underlying PI policy. Late contract certainty was a market vice for decades; modern facultative placements aim to complete documentation within 30 days.
Claims notification and recovery. When a claim occurs, the cedant notifies the facultative reinsurers in accordance with the contract, often subject to a claims cooperation or claims control clause. Recovery flows after the cedant has paid the insured.
The contractual relationship is between cedant and reinsurer. The insured PI firm has no contract with the reinsurer and does not see the placement.
Worked UK example
A large international consulting firm seeks £25m of PI cover for a UK-and-international engagement. The primary insurer is comfortable with the first £5m but does not have treaty capacity beyond that for this particular consultant given existing concentration in management consulting. To complete the £25m limit, the broker structures the programme as:
- Primary £5m written by the cedant, retained partly behind its quota share treaty.
- £20m excess £5m built in three layers (£5m xs £5m, £10m xs £10m, £5m xs £20m), each layer written by a different lead insurer.
Each layer insurer in turn may buy facultative reinsurance to cap its own retention. For example, the £10m xs £10m layer insurer might place 60% of its line facultatively with two reinsurers — those reinsurers underwriting the specific consulting risk, the wording, and the claims history rather than being tied to the layer insurer’s treaty.
When a £14m claim is paid, recovery cascades through the tower as described in following form PI excess layers. The facultative reinsurers behind the £10m xs £10m layer then refund their 60% to the layer insurer in line with the facultative slip.
The insured firm sees only the layer insurers on its policy schedules. The facultative reinsurance behind those layer insurers is invisible to the firm, but it is what made the £25m of capacity possible in the first place.
When facultative reinsurance matters
Three situations make facultative the right answer.
Large limits beyond treaty capacity. When an insured needs £20m, £30m, £50m or more of PI cover, no single treaty will provide it. Layers are built from multiple insurers, each potentially using facultative reinsurance to limit their own exposure.
Non-standard risks outside treaty. If a treaty excludes US exposure, audits of listed companies, financial-services regulatory work or some specialist coverage, the cedant cannot write that risk unless it sets aside its own net capacity or buys facultative cover. Facultative gives the cedant a route to write business it would otherwise have to decline.
Accumulation management. A cedant may already have meaningful exposure to a sector and want to avoid adding more net retained risk. Buying facultative reinsurance on the next material risk lets it grow the gross book without growing the net.
For the policyholder, facultative reinsurance behind their cover is generally invisible. However, when a layer insurer is heavily reliant on a single facultative reinsurer who later withdraws, that layer can become difficult to renew, with knock-on effects on tower stability.
Common variations
Facultative placements take several forms:
- Facultative proportional. The reinsurer takes a defined percentage share of the underlying policy and the same share of premium and losses.
- Facultative excess of loss. The reinsurer pays losses above an attachment point up to a defined limit, regardless of the underlying policy share.
- Facultative obligatory. A hybrid: the cedant has the option to cede risks within parameters, but the reinsurer is obliged to accept what is ceded. Less common in modern PI but seen historically.
- Open cover. A pre-negotiated facility under which qualifying risks can be ceded without separate underwriting. Operationally similar to treaty but with broader cedant discretion.
- Loss portfolio transfer. Facultative arrangement reinsuring a specific known book or portfolio of losses, often used for run-off or M&A.
Related concepts
- PI treaty reinsurance — automatic class reinsurance.
- PI tower programme — layered structures often using facultative inside layers.
- PI coinsurance — primary-level proportional sharing.
- Following form PI excess layers — how excess layers attach.
- PI binding authority — delegated underwriting, sometimes backed by facultative.
Frequently asked questions
What is PI facultative reinsurance?
Reinsurance arranged for a single specific PI risk, negotiated case by case. It contrasts with treaty reinsurance, which applies automatically to all risks within a defined class.
Who buys PI facultative reinsurance?
Insurers. The insured does not buy it. Insurers use facultative to extend capacity beyond treaty, to reinsure non-standard risks, or to manage accumulation.
Do I see facultative reinsurance on my PI policy?
No. The contract is between the insurer and reinsurers. Your policy schedule shows the insurers on cover. Facultative behind those insurers is invisible to you.
Does facultative make my cover more or less secure?
It does not change your direct contract with the insurer, who remains liable to you in full. Whether facultative makes the insurer’s overall position stronger or weaker depends on the quality of the reinsurance security. Reinsurance failure is rare in regulated markets.
How does facultative differ from treaty?
Treaty applies automatically to all qualifying risks; facultative is negotiated risk by risk. Both have a place in a typical insurer’s reinsurance programme.
Why might an insurer buy facultative for a single PI risk?
To extend limits beyond treaty, to reinsure risks excluded from treaty, or to keep concentration risk under internal limits.
Does facultative reinsurance affect my premium?
Indirectly. If a layer insurer cannot place facultative on competitive terms, it may raise rates or reduce line size, affecting the layer’s pricing and the overall tower cost.
Is facultative reinsurance regulated?
Yes. UK reinsurance is regulated by the PRA and FCA. Facultative placements with overseas reinsurers must meet UK security and contract certainty expectations.
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About Apex Insurance Brokers Ltd
Apex Insurance Brokers Ltd is a Bristol-based insurance broker authorised and regulated by the Financial Conduct Authority (firm reference number 724952). The company is registered in England and Wales under Companies House number 07014570. Contact: info@apexinsurancebrokers.co.uk | 0117 325 0027.
Last reviewed: May 2026 by Apex Insurance Brokers Ltd.
Important: this article is general information, not advice on your specific circumstances. For advice on PI insurance for your firm, contact us on 0117 325 0027 or info@apexinsurancebrokers.co.uk.