Self-Insurance
Also known as: Risk Retention, Self-Funding, Self-Insured Program
Self-insurance is the deliberate decision to retain risk and fund losses internally rather than buy a traditional insurance policy. Instead of paying premium to transfer risk, the business earmarks money — through reserves, a dedicated fund, or a formal program — to pay claims as they occur. It is distinct from simply going bare: a genuine self-insurance program measures expected losses, sets aside adequate funds, and administers claims, often with the help of a third-party administrator. For frequent, predictable losses, self-insuring can eliminate the insurer's expense load and profit margin, keeping investment income and unspent loss dollars with the company.
For a small-business buyer, pure self-insurance is usually reserved for larger or well-capitalized organizations, especially in workers compensation and auto, where states require self-insured employers to qualify financially and post security such as a bond or letter of credit. Most smaller firms instead use partial self-insurance embedded in ordinary policies — a deductible or a self-insured retention means you are self-insuring the first layer of every loss. Understanding this helps you weigh higher retentions (lower premium, more retained risk) against lower retentions (higher premium, more transfer).
A practical nuance: self-insurance works best for high-frequency, low-severity losses that are statistically predictable, and it should almost always be paired with excess workers compensation or excess liability coverage to cap the tail risk of a catastrophic claim. Businesses that outgrow simple retentions often graduate to a captive or group captive to formalize their self-insurance with tax and reinsurance advantages. The core discipline is the same regardless of structure: fund the expected losses honestly, administer claims professionally, and buy protection above the level you can comfortably absorb.
Real-world scenario
Sierra Ridge Logistics, a 340-employee regional trucking-and-warehousing firm with an annual payroll of $21,000,000, decided to self-insure its workers' compensation exposure after its guaranteed-cost renewal quote hit $685,000. Instead of paying a carrier a fixed premium, the company applied to its state for a self-insurance certificate, agreeing to fund claims directly up to a self-insured retention of $250,000 per occurrence and posting a $1,200,000 surety bond as security for the state.
To cap the tail risk, Sierra Ridge bought an excess workers' compensation policy for $145,000 that pays anything above the $250,000 retention, subject to statutory limits and a $2,000,000 annual aggregate cap. It also hired a third-party administrator to handle claims for a flat $110,000 per year. In its first program year a warehouse forklift accident produced a serious back injury: medical bills reached $340,000, an indemnity settlement was struck at $215,000, and outside legal defense added $28,000 — a single claim of roughly $583,000, of which the excess carrier reimbursed $333,000 above the retention while Sierra Ridge retained $250,000.
Across the full year Sierra Ridge retained $250,000 on that claim plus about $150,000 in smaller lost-time and medical-only claims — $400,000 in total retained losses — then added the $145,000 excess premium and $110,000 in fees for an all-in cost near $655,000 versus the $685,000 guaranteed-cost quote, keeping roughly $30,000 of the underwriting profit and float that a carrier would otherwise have earned.
How it affects your premium
Self-insurance has no traditional "premium" — instead your all-in cost is driven by expected losses, the security you must post, and the excess coverage that caps your downside. The biggest cost levers are:
- Expected loss volume and frequency. Your projected incurred losses — based on payroll, headcount, and historical claim experience — are the largest funding line, since you pay every dollar below your retention.
- Retention level. A higher self-insured retention lowers your excess premium but raises the cash you must reserve for each claim; a lower retention does the reverse.
- Excess/stop-loss pricing. The cost of your stop-loss or excess policy depends on your industry hazard, retention, and aggregate cap — the layer that protects you from a catastrophic claim.
- Collateral and security requirements. States and excess carriers require surety bonds, letters of credit, or cash deposits, which tie up working capital and carry financing costs.
- Claims administration. Third-party administrator (TPA) fees, medical bill review, and litigation management are fixed costs you now pay directly instead of embedding them in a carrier premium.
- Reserve adequacy and IBNR. Under-funding known case reserves or losses that are incurred but not reported can turn a "cheap" year into a deficit that hits future budgets.
Common misconceptions
Myth: Self-insurance means going completely without insurance and hoping nothing happens.
Reality:
Almost no responsible self-insured program is truly bare — companies retain routine losses but buy excess or stop-loss coverage above a retention to cap catastrophic claims. Self-insurance shifts how you pay for losses, not whether you're protected.
Myth: Self-insurance is always cheaper than buying a guaranteed-cost policy.
Reality:
It's only cheaper if your actual claims come in below the carrier's built-in margins — a bad claim year, under-funded reserves, or collateral costs can make it more expensive. It rewards employers with strong loss control and predictable, favorable claim experience.
Myth: Once you self-insure, you no longer need any carrier relationship or filings.
Reality:
Self-insured employers must qualify with the state, post security, file financials, and often use a fronting carrier to issue certificates and satisfy contractual insurance requirements.
Frequently asked questions
What's the difference between self-insurance and a high deductible?
They're economically similar, but with a deductible the carrier still issues the policy, pays claims, and bills you back; with self-insurance you fund and often administer claims yourself and must qualify with the state. A large deductible is often the simplest on-ramp before formal self-insurance.
Do I still need excess coverage if I self-insure?
Almost always yes. An excess or stop-loss policy caps a single catastrophic claim or a bad-year aggregate, which is essential because workers' comp has unlimited statutory medical exposure.
How much money do I have to set aside to self-insure?
You must fund expected retained losses plus a margin, and post state-required security such as a surety bond, letter of credit, or cash deposit — often tied to your outstanding case reserves and IBNR. Amounts vary by state and by your loss history.
Is self-insurance the same as a captive?
No. A captive is a licensed insurance company you own that formalizes self-insurance with its own policies, reserves, and reinsurance. Self-insurance retains risk on your own balance sheet without forming a separate insurer, though a risk retention group is a related pooled option.
What size company should consider self-insurance?
Generally mid-size and larger employers with stable cash flow, strong safety programs, and enough claim volume for losses to be predictable — often those paying six figures or more in premium where their own experience, not a rate class, drives cost.
Sources cited
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