A deductible and a self-insured retention both describe money the insured pays before the carrier's money is used. They are not interchangeable, and the difference decides who handles the claim, who pays the lawyer, and whether the insured is on their own for the first several thousand dollars.

Deductible

The carrier handles the claim from the first dollar. It adjusts the loss, appoints defence counsel, and pays — then recovers the deductible from the insured, or nets it out of the settlement. The insured's obligation is financial, not operational.

Practically: you report the claim and the carrier takes it from there. You owe the deductible, but you are never alone with the claim.

Self-insured retention

The insured pays the first layer themselves, and on most forms the carrier's obligations — including the duty to defend — do not attach until the retention is exhausted. Below the SIR the insured is effectively their own insurer: they hire and pay counsel, manage the file, and fund the defence.

That is the real difference. A $25,000 deductible and a $25,000 SIR cost the same in a large loss. In a claim that resolves for $18,000, one gets handled for you and one is entirely yours to run.

The four differences that matter in practice

  • Who defends. Under a deductible the carrier defends immediately. Under an SIR the insured usually must, until the retention is spent. Defence costs on a small claim can exceed the claim.
  • Where the limit sits. An SIR normally sits below the limit, so the limit stacks on top. Deductibles vary by form — some reduce the limit, some do not. Read it rather than assuming.
  • Additional insureds. An SIR can create genuine problems for a party added to your policy under contract. If they have to satisfy your retention before coverage responds, you may not be delivering the protection your contract promised.
  • Contracts and financial strength. Many construction and vendor contracts either cap or prohibit self-insured retentions, and carriers will want evidence the insured can actually fund one. A retention only works for a business with the cash to meet it.

Where you see each

Deductibles are the norm on property and on most standard-market casualty. Self-insured retentions turn up on professional liability, D&O, EPLI, and a lot of excess and surplus lines placements — often as the price of a lower premium on a risk the carrier wants the insured invested in.

The question to ask a client

"If a claim came in tomorrow that was going to settle for less than [the retention], are you set up to hire the lawyer and run it yourself?" If the answer is no, a retention is the wrong structure however attractive the premium looks.

Related: Defense inside the limit · E&O reference sheet

Educational only — confirm against the actual policy form and endorsements.