What Is a Self-Insured Retention (SIR) in Commercial Real Estate?

Self-insured retention is one of the most misunderstood concepts in commercial real estate insurance, and one of the most important for any operator evaluating a captive structure. Understanding what it is, how it differs from a deductible, and how it functions in a captive program is foundational knowledge for any real estate professional who wants to intelligently manage their insurance economics.

The definition: what a self-insured retention is

Self-insured retention (SIR) is a defined dollar amount of risk that an insured party (the real estate owner or operator) agrees to absorb on each covered claim before the insurance policy pays anything. It is the floor of the insured's financial exposure per incident.

If a property has a $250,000 SIR on its general liability policy and a visitor is injured on the premises, producing a $400,000 judgment, the property owner pays the first $250,000 from their own resources. The insurer pays the remaining $150,000 above the SIR threshold.

SIR versus deductible: a critical distinction

Most operators are familiar with deductibles but less familiar with SIRs. The distinction matters significantly in how each works in practice:

How a deductible works

With a traditional deductible, the carrier defends the claim, controls the settlement process, and pays the full judgment or settlement. After resolution, the carrier bills the policyholder for the deductible amount. The carrier is in control throughout, including the decision of whether to settle and at what amount.

How a SIR works

With a self-insured retention, the insured is responsible for defending and paying claims up to the SIR threshold before the carrier's policy is triggered. The insured controls claim handling, defense counsel selection, and settlement decisions within the SIR layer. The carrier's obligations begin only when and if the claim exceeds the SIR amount.

This distinction has important practical implications. An operator with a $100,000 SIR is not just agreeing to pay the first $100,000 of claims, they are agreeing to manage the claims process up to that threshold, including hiring defense counsel and making settlement decisions. This requires either internal claims management capability or a relationship with a third-party administrator (TPA) who can handle claims on the operator's behalf.

The SIR gives the insured more control but requires more capability. The deductible gives the carrier more control but provides more simplicity. For sophisticated operators with strong risk management practices, the SIR is typically the more favorable structure.

Why SIRs matter in real estate insurance

Premium reduction

Accepting a higher SIR reduces the insurance premium because the carrier's exposure is reduced. An operator who accepts a $250,000 SIR on their GL policy is effectively self-insuring the routine, smaller claims layer (slips, falls, minor property disputes) and transferring only the larger, more catastrophic exposure to the carrier. This dramatically reduces the premium for the retained catastrophic coverage.

Alignment with captive structures

The SIR concept is foundational to understanding how captive insurance programs work in real estate. In a captive structure, the operator is essentially formalizing a large self-insured retention into a structured insurance entity. The captive retains the claims layer that the traditional SIR covers, but with important enhancements: reserves are professionally managed, claims are administered through a TPA, and the underwriting profit on the retained layer distributes back to ownership rather than being absorbed as pure loss exposure.

A captive structure turns the SIR from a pure cost center into a potential profit center and the operator retains the risk, but when that risk costs less than the retained premium, the difference is profit rather than absorbed loss.

SIR sizing in real estate: practical guidance

The appropriate SIR level depends on several factors:

• Portfolio size and cash flow: the SIR should be sized so that a maximum loss year (multiple claims at the SIR threshold) would not materially impair the portfolio's debt service or operating reserves

• Claims history and loss ratio: operators with consistently below-average loss ratios have documented evidence that supports accepting larger SIRs because the historical data shows the retained layer will cost less than the premium reduction it generates

• Market and litigation environment: operators in nuclear verdict markets (Houston, Cook County, South Florida) should be more conservative with SIR sizing because the worst-case single-claim scenario is more severe

• Reinsurance backstop availability: in a captive structure, the SIR can be sized aggressively when stop-loss reinsurance caps the maximum exposure at a defined threshold

$100K–$500K: Typical SIR range for professionally managed multifamily GL policies, varies by portfolio size and market.

20–35%: Typical premium reduction from moving from a low deductible to a meaningful SIR on commercial GL.