What is a self-insured retention (SIR)?

A self-insured retention functions similarly to a deductible in that it represents your out-of-pocket share of a claim, but there are important mechanical differences that tree service owners need to understand. With a standard deductible, the insurance carrier manages the claim from the first dollar — paying defense costs, investigating, and negotiating — then bills you for the deductible amount at settlement. With an SIR, you are responsible for managing and funding the claim entirely until your retention amount is exhausted, at which point the insurance carrier steps in.

SIRs are most commonly found in excess and surplus (E&S) lines policies, umbrella policies, and professional liability policies. For tree service companies that have been placed in the E&S market due to claims history or high-hazard operations, an SIR of $5,000 to $25,000 on general liability is typical. Larger operations or those with significant claims history may face SIRs of $50,000 to $100,000.

The practical implications of an SIR versus a deductible are significant. First, defense costs: under most SIR structures, defense costs (attorney fees, expert witnesses, investigation costs) erode the SIR. If your SIR is $10,000 and defense costs reach $10,000 before any settlement payment, your SIR is satisfied and the carrier takes over — but you have paid $10,000 without any compensation to the claimant. Under a deductible structure, the carrier pays defense costs separately and the deductible applies only to the indemnity payment.

Second, cash flow: an SIR requires that you have the funds available to pay claims and defense costs as they are incurred. If you cannot fund the SIR, the claim goes unmanaged, potentially resulting in a default judgment. Some carriers require proof of financial ability to fund the SIR before issuing the policy — this may include financial statements or a letter of credit.

Third, claims reporting: even though you are responsible for the claim within the SIR, you must still report the claim to your carrier promptly. Failure to provide timely notice — even for a claim you believe will resolve within your SIR — can result in the carrier denying coverage if the claim later exceeds the retention amount.

When evaluating a policy with an SIR, compare the premium savings against the retained risk. A $10,000 SIR might reduce your annual GL premium by $3,000 to $5,000. If you typically have one small claim per year, the SIR costs you more than the savings. But if you have a clean claims history, the premium savings accumulate while the SIR is rarely triggered. Discuss the trade-offs with your broker and ensure your cash reserves can handle the retention if a claim arises.