A surplus note is a long-dated, deeply subordinated debt instrument issued almost exclusively by U.S. insurance companies to raise capital that state regulators treat as equity rather than as a liability. It looks like a bond on the surface, with a fixed coupon and a stated maturity, but two features set it apart from anything else in corporate finance: every payment of interest and principal requires advance approval from the insurance commissioner in the insurer’s home state, and the note ranks below policyholders and all other creditors if the company fails.
Who Issues Surplus Notes
Life, property and casualty, and health insurers all issue surplus notes, but mutual insurance companies rely on them most heavily. Mutuals are owned by their policyholders and have no stock to sell, so a surplus note is often the only practical way to bring in outside capital without converting to a stock company. Stock insurers issue them too, usually as a supplement to conventional financing. Reciprocal insurers sometimes hold surplus that consists entirely of surplus notes, which shows how central the instrument can be to certain corners of the industry.1National Association of Insurance Commissioners (NAIC). Supplemental Analysis Guidance – Review of Surplus Notes
The proceeds go to a range of purposes. An insurer might strengthen its Risk-Based Capital (RBC) ratio, absorb catastrophic losses, finance a merger, or fund expansion into new lines of business. Whatever the use, the appeal is the same: the money comes in as capital, not as ordinary debt.
Why the Note Counts as Capital
The entire point of the structure is the accounting treatment under Statutory Accounting Principles (SAP), the framework state regulators and the NAIC use to measure insurer solvency. Under SAP, an approved surplus note counts as statutory surplus, meaning equity, rather than a liability. The classification lifts the insurer’s capital ratios immediately, giving the company what the industry calls surplus relief.2National Association of Insurance Commissioners (NAIC). Surplus Notes
To earn that treatment, the note has to satisfy the criteria set out in the NAIC’s Statement of Statutory Accounting Principles No. 41R. It must be subordinated to policyholders, claimants, and all other creditors. Interest and principal payments must require approval from the domiciliary commissioner. And the insurer must receive the proceeds in cash or other admitted assets whose value and liquidity satisfy the commissioner.3National Association of Insurance Commissioners (NAIC). SSAP No. 41R – Surplus Notes, Enhanced Disclosures A note that fails any of these requirements is treated as ordinary debt and loses the capital benefit entirely.
Equity Under SAP, Debt Under GAAP
The SAP treatment stands in sharp contrast to Generally Accepted Accounting Principles, which publicly traded companies use for their financial statements. Under GAAP, a surplus note appears on the balance sheet as a long-term debt liability because the insurer is contractually obligated to repay principal and interest. That dual identity, equity under SAP and debt under GAAP, is one of the defining oddities of the instrument.2National Association of Insurance Commissioners (NAIC). Surplus Notes
One additional restriction shapes how the debt side behaves. Unpaid interest on a surplus note cannot be added to principal, and interest does not accrue on unpaid interest.1National Association of Insurance Commissioners (NAIC). Supplemental Analysis Guidance – Review of Surplus Notes There is no compounding. If the commissioner withholds approval for several years, the insurer owes the original missed payments and nothing beyond that.
The Commissioner Controls Every Payment
The single most important thing to understand about a surplus note is that the insurer cannot pay the holder, even if it has the money and wants to, without the state insurance commissioner’s permission. That approval requirement applies to every coupon payment and every principal repayment for the life of the note.2National Association of Insurance Commissioners (NAIC). Surplus Notes
When a payment comes due, the insurer submits a request. The regulator evaluates whether making the payment would compromise the company’s ability to meet its obligations to policyholders. The review looks at overall financial health: RBC ratio, premiums-to-surplus ratio, profitability trends, recent changes in surplus, and whether the company would still meet the surplus floor written into the note agreement after the payment.1National Association of Insurance Commissioners (NAIC). Supplemental Analysis Guidance – Review of Surplus Notes
If the commissioner concludes that the payment would push surplus below adequate levels, the payment is denied or deferred. Here is where surplus notes diverge from every other form of corporate debt: that denial is not an event of default. There is no acceleration of principal, no cross-default with other obligations, no remedies available to the noteholder. The note simply keeps running, and the insurer tries again at the next payment date. That is why regulators are comfortable calling the instrument capital. The holder’s claim can be suspended whenever policyholders need protection.
Where Holders Rank if the Insurer Fails
Surplus notes sit at the bottom of an insurer’s capital structure, above only true equity. If an insurance company enters receivership or liquidation, state receivership laws, many modeled on the NAIC’s Insurer Receivership Model Act, generally pay claims in this order: administrative expenses of the liquidation, then policyholder claims, then state guaranty association claims, then employee wages, taxes, and general creditors. Surplus notes fall below all of these categories.3National Association of Insurance Commissioners (NAIC). SSAP No. 41R – Surplus Notes, Enhanced Disclosures
Insurance liquidations often leave insufficient assets to cover even higher-priority claims, so recovery rates for surplus notes in a failed insurer can be very low. The deep subordination is exactly what makes the instrument valuable to regulators. It absorbs losses before any policyholder is affected.
Debt for Federal Tax Purposes
Despite the equity treatment on the state regulatory side, surplus notes are generally treated as debt for federal income tax purposes, which means the insurer can deduct interest payments as a business expense. The IRS evaluates whether an instrument is truly debt or disguised equity using factors outlined in Internal Revenue Code Section 385.4Office of the Law Revision Counsel. 26 U.S. Code 385 – Treatment of Certain Interests in Corporations as Stock or Indebtedness Surplus notes generally pass because they carry a fixed maturity date, pay a stated interest rate, and create a genuine obligation to repay principal. The conditional payment feature adds complexity, but the obligation itself is unconditional. Only the timing of payment depends on regulatory approval.
An insurer whose notes look too much like equity, for instance because the note is held entirely by a parent company with no realistic expectation of repayment, could face IRS reclassification and lose the interest deduction.
Who Buys Surplus Notes
Surplus notes are not sold to retail investors. They are issued through private placements, typically under SEC Rule 144A, which limits sales to qualified institutional buyers, defined as entities that own and invest at least $100 million in securities of unaffiliated issuers. The actual buyers are other insurance companies, pension funds, and large asset managers comfortable with illiquid, long-dated instruments.
Maturity and Liquidity
Most surplus notes carry maturities of 20 to 30 years, and some run longer. AM Best treats notes with a remaining maturity over 10 years as having equity-like characteristics, which is part of the reason issuers favor long terms. There is no active secondary market. An investor should plan on holding to maturity or finding another institutional buyer through a negotiated private sale. Many notes include call provisions letting the insurer redeem early, but like every other payment, an early call requires the commissioner’s approval.5AM Best. Evaluating US Surplus Notes
Ratings and Yield
Rating agencies notch surplus notes below the insurer’s own issuer credit rating to reflect the subordination and payment conditionality. AM Best’s methodology calls for two to three notches below the issuer credit rating for insurers rated bbb- or higher, and three or more notches for insurers rated bb+ or lower.5AM Best. Evaluating US Surplus Notes An insurer rated “A” might see its surplus note rated somewhere around “BBB.”
The yield compensates for the risk. Surplus notes generally offer a spread above comparable senior unsecured bonds from public insurance companies and well above Treasury yields at similar maturities. Investors are being paid a premium for accepting an instrument where the regulator, not the borrower, controls the cash flow. A generous coupon means little if the commissioner never lets the insurer pay it, so buyers evaluating a surplus note look past the headline rate at the insurer’s RBC ratio, underwriting profitability, reserve adequacy, and the historical willingness of the domiciliary state to approve payments.