Captive Insurance for Small Businesses: How 831(b) Micro-Captives Work and the IRS Risks

By Yarik Yarosh, CPA ·September 5, 2026 ·7 min read

Written by Yarik Yarosh, CPA (US & Canada) September 5, 2026 · FL CPA license AC61704 · CPA Ontario

Captive insurance is a legitimate risk management tool used by tens of thousands of businesses worldwide, but the micro-captive election under IRC 831(b) has attracted intense IRS scrutiny because of widespread abuse. The concept is straightforward: a business owner forms a wholly owned insurance company (the “captive”), pays premiums to the captive for coverage of specific business risks, deducts those premiums as a business expense, and the captive receives the premiums tax-free under the 831(b) election (taxed only on investment income, not underwriting income). When the risks being insured are real, the premiums are actuarially justified, and the captive operates as a genuine insurance company (with proper licensing, reserves, claims procedures, and risk distribution), this structure provides both legitimate risk management and a tax benefit. When the captive is a shell that insures fabricated risks at inflated premiums with no real intention to pay claims, it is a tax shelter that the IRS has been winning in court consistently.

✓Key takeaway

831(b) micro-captive basics:

Element	Details
831(b) election	Captive taxed only on investment income (not premium income)
Premium limit	$2,800,000/year (2025, indexed for inflation)
Parent deduction	Premiums are deductible as business expense (IRC 162)
Captive taxation	Investment income taxed; premiums received = tax-free
Risk distribution	Must insure risks from multiple sources or through a risk pool
State licensing	Captive must be licensed as an insurance company (many states allow, plus offshore domiciles)
IRS reporting	Transactions of interest (Notice 2016-66): must disclose on return

Legitimate vs. abusive captive characteristics:

Legitimate Captive	Abusive Captive
Insures real, identifiable business risks	Insures vague, overstated, or nonexistent risks
Premiums set by independent actuary based on risk data	Premiums set to maximize deduction, not match risk
Claims are paid when covered events occur	Claims are rarely or never paid
Proper reserves maintained	Reserves loaned back to the parent or owner
Licensed in a reputable domicile	Formed in a minimal-regulation jurisdiction
Independent board and management	Owner controls everything
Arm’s-length transactions	Circular flow of funds back to the owner
Risk distribution (multiple insureds or risk pool)	Single insured with no distribution

How does a legitimate micro-captive save taxes?

Hypothetical example

Round numbers. A business owner with $2,000,000 net income operates a manufacturing business with legitimate uninsured or underinsured risks.

Risks insured through the captive:

Risk	Commercial Coverage Available?	Captive Premium (Actuarial)
Cyber attack / data breach	Partial (high deductibles)	$200,000
Supply chain disruption	Limited or excluded	$300,000
Key employee loss	Limited (key man life only, not departure)	$150,000
Regulatory compliance risk	Not available	$200,000
Product recall	Excluded from general liability	$150,000
Total captive premiums		$1,000,000

Tax impact:

Item	Without Captive	With Captive
Business net income	$2,000,000	$2,000,000
Captive premiums deducted	$0	($1,000,000)
Taxable income (pass-through, 37% bracket)	$2,000,000	$1,000,000
Federal income tax	$740,000	$370,000
QBI deduction impact (20% of QBI)	($400,000 x 20% rate savings)	($200,000 x 20%)
Net tax savings from captive		~$280,000

The captive receives $1,000,000 in premiums and pays tax only on its investment income (say $30,000 on a $2M invested portfolio at 1.5% yield = $450 in tax). The net tax deferral is approximately $280,000 per year.

Where the money sits (the captive’s balance sheet):

Year	Premiums In	Claims Paid	Investment Income	Year-End Assets
Year 1	$1,000,000	$50,000	$15,000	$965,000
Year 2	$1,000,000	$100,000	$30,000	$1,895,000
Year 3	$1,000,000	$75,000	$45,000	$2,865,000
Year 5	$1,000,000	$200,000	$75,000	$4,590,000
Year 10	$1,000,000	$150,000	$125,000	$9,200,000

After 10 years, the captive has accumulated ~$9.2 million. This money belongs to the captive (and indirectly to the owner), but extracting it requires either paying claims, distributing dividends (taxable), or dissolving the captive (taxable).

The IRS’s audit triggers:

Red Flag	Why It Matters
Premiums far exceed commercial market rates	Suggests premiums are inflated for tax benefit
No claims paid in 5+ years	Real insurance pays claims; no claims suggests no real risk
Captive loans money back to the parent	Circular flow negates the risk transfer
No independent actuary	Premiums not based on genuine risk assessment
”Cookie-cutter” captive from a promoter	IRS targets promoters who mass-market abusive structures
Owner is sole insured (no risk distribution)	Insurance requires risk distribution among unrelated insureds
Premiums equal exactly $2.8M (the 831(b) cap)	Suggests premium was set to maximize deduction, not cover risk

Recent IRS enforcement:

Action	Details
Notice 2016-66	Listed micro-captives as “transactions of interest” requiring disclosure
Avrahami v. Commissioner (2017)	Tax Court held captive premiums were not deductible (no risk shifting, no risk distribution)
Reserve Mechanical Corp (2018)	Tax Court denied deductions; premiums were unreasonable; captive was a tax shelter
Syzygy Insurance Company (2019)	Tax Court denied deductions; circular flow of funds, no genuine risk
IR-2023-189	IRS announced settlement initiative for micro-captive cases
Micro-captive listed as IRS Dirty Dozen (2023-2025)	Annual inclusion on the IRS’s list of tax scams

When a captive DOES make sense:

Factor	Threshold
Business income	$1,000,000+ net (otherwise savings don’t justify costs)
Genuine uninsured risks	Must have real risks that the commercial market does not adequately cover
Actuarial support	Independent actuary must set premiums based on loss data
Claims history	Must be prepared to pay claims when covered events occur
Risk distribution	Must insure risks from multiple unrelated parties (through a pool or multiple entities)
Professional management	Captive must be managed by a licensed captive management company
Domicile	Licensed in a state with established captive laws (Vermont, South Carolina, Delaware, Utah, etc.)
Annual cost	$15,000-$30,000 in management, actuarial, legal, and regulatory fees

When a captive does NOT make sense:

Situation	Why Not
Income below $500,000	Savings don’t cover costs; IRS scrutiny risk not worth it
No genuine uninsured risks	Captive must insure real risks; fabricated risks = audit bait
Promoter says “everyone is doing it”	Promoter-driven captives are the IRS’s primary target
Primary motivation is tax savings	Courts consistently deny deductions when tax savings is the primary purpose
No independent actuarial analysis	Required for defensibility

Illustrative numbers only, not a real client and not advice for your facts.

Is business insurance tax deductible?

Business insurance premiums (general liability, professional liability, property, cyber liability, and business interruption) are fully deductible as ordinary business expenses on Schedule C or the corporate return in the year paid. Workers’ compensation premiums are deductible as a labor cost. Health insurance premiums for sole proprietors and more-than-2% S-Corp shareholders are deductible on Form 1040, not on Schedule C. Key person life insurance premiums are NOT deductible, though the proceeds are generally tax-free. If a policy covers both personal and business use (auto insurance on a mixed-use vehicle), only the business-use percentage is deductible.

What happens when I receive an insurance payout?

The tax treatment depends on what the payout covers. Proceeds that reimburse a previously deducted expense (lost inventory, repair costs) are taxable income because the deduction already reduced tax. Proceeds exceeding your adjusted basis in a destroyed asset create a taxable gain, though IRC 1033 allows deferring the gain by reinvesting in similar property within two years. Business interruption payments that replace lost profits are taxable income. Liability claim proceeds (insurance pays a settlement on your behalf) are generally not taxable to the business. Document every claim and payout for the tax return.

Related guides:

RRSP Contributions as a US Citizen in Canada
Foreign Tax Credit Carryforward and Carryback
Estimated Tax Payments for Handyman Businesses

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Cite this page

Yarik Yarosh, CPA. "Captive Insurance for Small Businesses: How 831(b) Micro-Captives Work and the IRS Risks." Blue Cloud CPA, September 5, 2026. https://bluecloudcpa.com/guides/small-business-captive-insurance-831b-micro-captive

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.