Insights

Collateral 101: LOCs vs Trusts — and What's Actually Negotiable

Once the regulatory floor is understood, the real decisions are the form the security takes and the terms written around it. A plain-English guide to trusts, LOCs and funds withheld — and where the negotiation actually lives.

31 August 2026

Every fronted captive programme eventually has the same conversation: the fronting carrier names a collateral figure, the captive owner asks where it came from, and both sides leave mildly dissatisfied. In our explainer on fronting arrangements we set out why that figure exists at all — the carrier remains liable on every policy it issues, and it can take statutory credit for the cession only if the recoverable is secured. This piece picks up where that one stops. Once the floor is understood, the decisions that actually move money are which form the security takes and which terms around it are genuinely open.

A thirty-second recap of the floor

The requirement starts at 100% of the carrier's reinsurance recoverable as it appears in Schedule F of its statutory statements — billed paid losses, case reserves, IBNR and unearned premium ceded to the captive, less any funds already held — with a cushion on top for credit risk and reserve volatility. The floor comes from regulation and is not worth contesting; the cushion is a commercial judgement, shaped by the captive's capitalisation, track record and reserving quality, which is precisely why it is worth discussing.

The part owners miss

The IBNR inside that recoverable is the carrier's own booked figure, straight from its accounting ledger — a lower estimate from the captive's actuary cannot be substituted for it. What can be written into the agreement is transparency: sight of the carrier's reserving methodology and development factors, an annual reconciliation against the captive's own estimate, and an agreed route for presenting evidence when the two diverge.

The three forms of security

Regulators recognise a short list of acceptable security, and each allocates cost and control differently.

A Regulation 114 trust. The captive places eligible assets in trust with the carrier as beneficiary. The captive retains ownership of the assets and keeps the investment income; no bank credit line is consumed. The trade-offs are trustee and administration costs, asset-eligibility rules, and slower mechanics when amounts change.
A clean, irrevocable, evergreen letter of credit. A bank instrument the carrier can draw on demand. Operationally simple and familiar, but the fees recur annually on the full face amount, the bank will usually require the captive to pledge assets against the facility anyway, and the LOC consumes credit capacity the parent may want for other purposes.
Funds withheld. The carrier simply keeps the premium. Simplest of all — but the captive gives up investment control and builds no asset base, which works against the long-term logic of retaining risk in the first place.

As programmes grow, the economics tend to favour the trust: LOC fees scale with the secured amount forever, while a trust's running costs flatten out and the investment yield stays with the captive. Smaller or newer programmes often start with an LOC for speed and convert later — and that conversion right is itself worth putting in writing at inception.

Form-level terms worth negotiating

Each form carries its own set of open terms, and they are where a prepared owner recovers real cost.

On a trust: the asset-eligibility schedule — how far beyond cash and government securities the carrier will accept — plus the top-up and withdrawal mechanics, how quickly any over-collateralisation is released after a valuation, and who bears the trustee's fees.
On an LOC: the clean-irrevocable-evergreen wording itself is a carrier requirement, not a discussion point. The negotiation sits with the bank — the fee rate and what the bank takes as pledge against the facility — and with the carrier, on automatic face-amount step-downs as valuations fall rather than reductions by request.
On funds withheld: the interest credited on the withheld balance, and a defined path for converting to a funded form once the programme matures.

The wider negotiation

Beyond the form, the open items cluster into two groups. The first is the size of the cushion above the floor, argued with evidence rather than sentiment. The second is mechanics: how often the collateral figure is revalued and settled, release triggers as old underwriting years run off, how subrogation recoveries are treated, and — in the first year, before any reserve history exists — a percentage-of-premium formula with a defined transition onto a reserve basis once experience accumulates.

The practical upshot: a captive that arrives at renewal with a current reserve study, a reconciliation against the carrier's figures, and specific asks from the lists above has a materially different conversation from one that simply asks for “less collateral”.

Go deeper

Members can continue with Lesson 3.4: Collateral Structures — LOCs, Trusts & Offsets, the Reference Library deeper dive on Schedule F and the fronting collateral formula, and the TCOR structuring decision tree. Not a member yet? See what Academy Access includes — Module 01 is free to read.

Educational content only — not legal, tax, actuarial, or financial advice. Consult qualified professionals before acting on any programme decision.