Captive insurance versus a reserve fund: what a physician group is really taking on

A physician group considering a captive insurer is not simply choosing a different account for premiums. It is considering whether to retain and finance risk through an insurance company it owns. That decision can affect capital, cash flow, claims control, regulatory work, tax reporting, and the group's ability to absorb a severe loss.

A reserve fund is different. It is money set aside for a deductible, self-insured retention, exclusion, or other uninsured cost. It does not issue a policy, transfer risk, or create a duty to defend. Start by naming the actual problem the group wants to solve.

First identify the risk, then the structure

Ask whether the group is trying to finance predictable small losses, reduce commercial premium volatility, retain a defined layer of malpractice risk, cover an excluded operational risk, or gain a different claims-administration model. Each purpose can point to a different solution: commercial insurance, a higher deductible, a self-insured retention, a reserve fund, a captive, reinsurance, or some combination.

Do not begin with a contribution target or a tax result. Those are outcomes to test after the group has defined the exposure, loss layer, capital requirement, and legal structure.

A captive must perform the work of an insurer

The owner creates a separate insurance company. The medical practice pays premiums to the captive. The captive issues policies and may pay covered claims. It can purchase reinsurance for losses above the layer it retains, subject to the reinsurance contract.

Ownership alone does not create insurance. The captive needs a defined risk, supportable pricing, sufficient capital, clear policy terms, claims administration, governance, and domicile-specific regulatory reporting. Its issued policy and any reinsurance agreement control their respective obligations; a feasibility study or premium invoice does not.

A complete proposal includes:

• a defined risk;
• a feasibility study based on exposure and loss data;
• premium calculations from qualified, independent professionals;
• capital and liquidity that remain available for claims;
• policies with stated terms, limits, and exclusions;
• a claims process that insureds can use;
• financial reports, regulatory filings, and governance; and
• reinsurance or another documented source of protection for severe losses; and
• a tax and exit analysis that does not assume capital is freely available to owners.

Be skeptical of a proposal that selects the contribution before it defines the insured risk. Expected and severe losses should inform premium and capital. They do not guarantee that a premium is reasonable, deductible, or adequate for a particular captive.

Select the risk that the group will retain

The group needs enough stable exposure and loss data to estimate the risk it plans to retain. Formation documents cannot replace this data. A new group with thin or changing experience may need external benchmarks and a conservative analysis; that uncertainty is a finding, not a gap to hide.

Use an appropriate historical period and state why it is appropriate. Review paid losses, reserves, clinician count, procedures, locations, policy limits, deductibles, self-insured retentions, commercial premiums, and changes in the practice. Separate frequent losses from severe losses that could exceed the captive's capital or reinsurance layer.

Then select the retained amount. A group can retain a deductible, self-insured retention, or defined amount of each loss. It can seek reinsurance above that amount. The analysis should test whether the retained layer justifies the fixed cost without making the group unable to fund a severe year.

Use this order: identify the exposure, estimate expected and severe losses, select the retained amount, and calculate the premium and required capital. A contribution target is not an underwriting method.

Define the claim process

Write and test the complete claim process before funding a captive.

1. Which event triggers notice?
2. Who investigates coverage and facts?
3. Who sets the reserve?
4. Who appoints defense counsel?
5. Who can settle the claim?
6. Which account pays defense and indemnity?
7. When does reinsurance attach?
8. Who reports the result to owners, reinsurers, regulators, and tax advisers when required?

Test the process with a representative claim before binding or renewal: a demand arrives, the patient is still receiving care, defense costs begin, the retained layer may be exhausted, and a reinsurer must be notified. The exercise should identify the actual policy terms, people, records, reporting deadlines, and funding path. It should not assume the captive or reinsurer will respond.

Require evidence for each part of the proposal

Ask these questions and require the listed documents.

The proposal must make each part of the insurance operation credible. A license, policy, and bank account alone do not prove a viable risk-financing program.

Compare a reserve account

A reserve account holds money for deductibles, retained losses, exclusions, and other uninsured costs. It does not issue a policy or transfer risk. It also has no insurer duty to defend a claim.

The owner controls the reserve and decides when to use it, subject to any contract, lender, or legal restriction. The account is not itself a captive insurer and ordinarily does not require a captive domicile, insurer balance sheet, or insurance-regulator filing. In return, the owner retains the loss and receives no contractual insurance protection from the account itself.

Compare both options with the same information:

1. Name each risk and the largest plausible loss.
2. Identify commercial coverage already available.
3. Price a higher deductible or self-insured retention.
4. Estimate expected losses and a severe-loss scenario.
5. Add every captive operating cost, capital requirement, tax cost, and exit constraint.
6. Compare the total cash committed over an explained time horizon.
7. Decide who will defend, settle, report, and administer each claim.

Commercial insurance and a reserve account may meet the needs of many physician practices. A group with reliable loss data, enough scale, durable governance, and capital can evaluate a captive. There is no universal premium threshold. The decision depends on the retained risk, capital, fixed costs, claims data, regulatory posture, and exit terms.

First compare commercial coverage, deductibles, self-insured retentions, reserve funding, and uncovered risks. If a captive remains potentially useful, obtain independent legal, actuarial, tax, accounting, regulatory, and insurance review of its capital, claims, pricing, governance, reinsurance, and exit terms together. A structure built to produce a preferred answer is not a substitute for a program that can pay the claims it writes.