831(b) Captives: What Advisors Need to Know Before Recommending One to a Client

If you advise closely held business owners, the captive question will eventually land on your desk — raised by a client who heard about it at a conference, or by a promoter who has already done the selling. As the CPA, attorney, or financial advisor in the room, you are the person best positioned to tell the difference between a captive that genuinely serves the client and one that will create more problems than it solves. This piece is about how to make that call.

The short version: a micro-captive that elects under Section 831(b) of the Internal Revenue Code is real insurance first and a tax treatment second. When the order gets reversed — when the structure is built backward from a deduction — it fails, and the client is left holding the consequences. Your value here is the same discipline you bring to everything else: insisting on substance before form.

Start with the client’s risk, not the client’s tax bill

The reason a captive can ever make sense is a risk problem, not a tax problem. A profitable, closely held business often carries meaningful exposure that the commercial market underprices, sublimits, or simply will not write — non-damage business interruption, the loss of a concentrated customer, a thin cyber limit, an exclusion that quietly leaves the owner self-insured. A captive lets that owner finance those risks through a licensed insurer they control, write real policies, set arm’s-length premiums, and pay their own claims.

That is the lede, and it has to stay the lede. Section 831(b) lets a qualifying small insurance company elect to be taxed only on its investment income rather than its underwriting income, provided its annual net written premiums stay at or below the statutory ceiling — $2.9 million for the 2026 tax year (Rev. Proc. 2025-32, indexed annually) — and it meets the diversification requirements added by the Protecting Americans from Tax Hikes (PATH) Act of 2015. But the election is a consequence of operating genuine insurance, not a strategy you run in reverse. As the statute is built, the election only becomes available after the company already qualifies as an insurance company. If the underlying risk financing does not make sense on its own, the election does not rescue it.

This is general educational information, not legal or tax advice — outcomes depend on the specific facts, and any election should be reviewed with qualified tax and legal advisors. See our disclosures.

When a captive genuinely fits — and when it does not

The most useful thing you can do early is screen. Before any structure is on the table, four questions decide whether a captive is even worth studying.

A captive tends to fit when the client has:

• Real insurable risk the market underprices. Genuine, fortuitous exposures that are uninsured or underinsured today — not a tax line item dressed up as a risk.
• A documented loss history. Losses you can actually price against, so premiums follow the exposure rather than reaching for a ceiling.
• A credible path to risk distribution. A way to pool enough genuinely independent risk that the arrangement distributes, not just shifts.
• The commitment to run it as an insurer. Steady funding, annual filings, claims handling, and audits — every year, not once.

It does not fit, and the honest answer is to say so, when the real motivation is a deduction rather than a risk to finance; when the business cannot fund premiums without strain; when there are no genuine uninsured exposures; or when no credible path to distribution exists. A client who fails the screen is not a client you talk into a captive — they are a client you protect from one. That candor is the advisor’s job, and it is also what keeps you out of the line of fire if the arrangement is later examined.

The insurance substance that makes it defensible

For a captive to be insurance for federal tax purposes, it has to be insurance in substance. Federal law has no statutory definition of insurance; the controlling Supreme Court source holds that an arrangement is insurance only if it involves both risk shifting and risk distribution (Helvering v. Le Gierse, 312 U.S. 531 (1941)). The IRS and the Tax Court apply that through a working framework of four elements — as applied in Avrahami and Reserve Mechanical:

1. Insurance risk. A real, fortuitous risk of loss — not an investment or ordinary business risk wearing an insurance label.
2. Risk shifting. The financial consequence of a loss genuinely moves from the insured to the captive; the risk actually leaves the operating business.
3. Risk distribution. The captive pools enough independent, uncorrelated exposures that the law of large numbers lets predicted losses approximate actual losses — the many premiums pay the few claims.
4. Insurance in its commonly accepted sense. It looks and operates like real insurance: arm’s-length pricing, real policies, claims actually handled, adequate capital, an entity run like an insurer.

For a single-owner captive, shifting is the easy half. Distribution is where micro-captives are made or broken. A captive insuring only the owner’s related businesses has very few independent exposures, and a handful of correlated risks do not distribute. Distribution is legitimately achieved by adding unrelated risk — typically by having the captive assume a measured slice of unrelated insureds’ losses through a genuine pool or reinsurance arrangement while ceding a slice of its own. The pool only counts if it is real: arm’s-length pricing, genuine claim exposure, and counterparties that could actually pay.

What the scrutiny history actually teaches

Micro-captives sit under active IRS scrutiny, and any advisor recommending one should understand why. The lesson of the cases the IRS has won is not that captives are illegitimate — it is a precise diagnosis of what separates durable structures from the ones that failed.

In Avrahami v. Commissioner, 149 T.C. 144 (2017) — the first major Tax Court loss for a micro-captive — the arrangement was held not to be insurance because it lacked risk distribution and was not insurance in the commonly accepted sense. The red flags read like a checklist of what to avoid: premiums that jumped roughly seven-fold once the captive appeared and tracked the 831(b) ceiling rather than the risk, pricing that was not actuarially supported, and a reinsurance “pool” that functioned as a circular flow of funds rather than a bona fide insurer. In Reserve Mechanical Corp. v. Commissioner, T.C. Memo. 2018-86 (aff’d, 34 F.4th 881 (10th Cir. 2022)), the captive failed on two independent grounds — inadequate risk distribution and policies that were not insurance in the commonly accepted sense — with a pooling arrangement the court again found to be a circular flow and premiums that were not arm’s length. The Tenth Circuit’s affirmance confirmed that the Avrahami principles hold up on appeal.

A related case is frequently overstated, so it is worth being precise. CIC Services, LLC v. IRS, 593 U.S. 209 (2021), was a unanimous procedural ruling: the Anti-Injunction Act did not bar a pre-enforcement challenge to an IRS reporting requirement. It was not a ruling that micro-captives are legitimate, and it should never be cited as the Supreme Court blessing captives. The substance of legitimacy still rests exactly where Le Gierse put it.

The takeaway for an advisor is clean: durable structures have genuine risk transfer, real distribution across enough independent exposures, premiums set by an independent actuary to the actual risk, adequate capital, and an entity operated like the insurer it claims to be. The ones that failed were engineered toward a number. The difference is not subtle, and it is the difference you are best placed to spot.

A word on the disclosure regime — confirm the current rule

The reporting rules around micro-captives are themselves being litigated, and the status has changed more than once. The IRS finalized disclosure regulations in 2025 (T.D. 10029, published January 14, 2025), curing the procedural defect that had sunk its earlier Notice 2016-66 — which a federal court vacated in 2022 for failing the Administrative Procedure Act’s notice-and-comment process. Then, in 2026, a federal court vacated the listed-transaction designation while leaving the transaction-of-interest designation in place, and both sides have appealed.

For an advisor, the practical point is not to memorize a designation that may shift again. It is this: micro-captives sit under active, changing scrutiny, and the specific disclosure obligation for any client — what must be reported, by whom, and on which form — should be confirmed with current qualified tax counsel for the relevant tax year rather than frozen from an article like this one. Treat the disclosure question as live, and verify it when it matters. This is general information, not legal or tax advice — see our disclosures.

The advisor’s role — and how Tessera works alongside you

Your job in a captive conversation is the same one you already do well: protect the client by insisting on substance. That means leading with the risk, screening honestly, and being willing to say no. When a captive does fit, it means making sure it is structured as insurance from the ground up — real risk transfer, genuine distribution, arm’s-length pricing, adequate capital, and clean ongoing operation — so that if the questions ever come, the answers are already on the table.

Tessera is built to work alongside the advisors a client already trusts, not to displace them. The single most important safeguard against the failures above is structural: the parties who validate a captive should be independent of the party who manages it. Tessera performs the underwriting, the feasibility study, and the ongoing management — and then submits that work for outside review. An independent actuary sets and validates pricing. Independent tax counsel advises on the tax position. An independent auditor performs the insurance-company audit. The client’s own CPA and attorney stay in the picture. No one marks their own homework, and that independence is itself part of what makes the arrangement defensible.

That collaboration is also, candidly, good for your relationship with the client — the advisor who quarterbacks an honest, well-built solution earns trust that lasts. But that is a consequence of getting it right, never the reason to raise a captive. The reason is always the client’s risk. If a captive genuinely fits, the right next step is a feasibility study that tests the structure before anything is formed. If it does not, the most valuable thing you can tell a client is that it is not the tool for them — and you will have done your job either way.