How to read an insurer's combined ratio and surplus

An insurer's combined ratio tells you whether it made or lost money on underwriting: below 100 percent means premiums covered claims and expenses, above 100 means they did not. Policyholder surplus is the cushion, the statutory value of assets left after liabilities are paid, and it is what stands behind your claim if the ratios turn bad. Neither number is a profit figure, and neither says anything about how an insurer treats claimants. They are best read together, over several years, against the industry.

This is a reading guide to the statutory numbers insurers file with regulators, not a verdict on any company. The industry figures below come from the NAIC's year-end 2025 reports and Verisk's 2025 results, and they are as of the end of 2025.

Policyholder surplus is not profit or equity

Statutory accounting is the set of rules insurers use in the annual statements they file with state regulators. It is built to answer one question: could this company pay what it owes if it had to stop writing new business? Because of that, it is deliberately conservative. The balance sheet counts only assets the regulator will accept ("admitted" assets), and it records the full cost of writing a policy, such as commissions, as an expense on day one even though the premium is earned over the policy term.

Policyholder surplus is what remains when you subtract liabilities (mainly the claim claim reserve and the unearned premium owed back to customers) from those admitted assets. It is the buffer that absorbs a bad year. Three misreadings are common:

• Surplus is not profit. Profit is one year's income. Surplus is a stock built over many years from profit, investment gains and capital added by owners.
• Surplus is not the same as shareholders' equity in a public company's financial statements. Public parents also report under generally accepted accounting principles (GAAP), which values things differently. The two can differ noticeably for the same company.
• Surplus is not spare cash. It is invested, and part of it is required by regulators as capital. A large number can mean a large company, not a safe one.

For scale, the NAIC reports that the U.S. property and casualty industry's aggregated policyholders' surplus (adjusted to eliminate double counting between affiliated insurers) rose 11.9 percent to an all-time high of $1.27 trillion at December 31, 2025, in its 2025 full-year industry report. Industry surplus says little about a single company. What matters is a company's surplus compared with the premium it writes and the claims it owes, which the ratios below capture.

The three ratios that make up the combined ratio

Every property and casualty insurer's annual statement lets you compute the same three ratios.

Two details trip readers up. First, the loss ratio is usually measured against premium that has been earned (the portion of premium for coverage already provided), while the expense ratio is usually measured against premium written, because most expenses are paid when a policy is sold. That is why the parts of a combined ratio do not always come from the same denominator. Second, "loss" includes loss adjustment expense, the cost of investigating and settling claims, so a claims department's staffing shows up in the loss ratio, not the expense ratio.

A real set of numbers

The NAIC's year-end 2025 industry snapshot shows how the pieces add up for the whole U.S. property and casualty industry:

The same snapshot gives industry combined ratios of 96.9 percent for 2024, 101.7 percent for 2023, 102.5 percent for 2022 and 99.6 percent for 2021. So in three of the last five years the industry as a whole lost money on underwriting or came close to breaking even, yet stayed solvent, because investment income and surplus filled the gap. Different sources measure slightly differently: Verisk and the American Property Casualty Insurance Association reported a preliminary 2025 combined ratio of 92.9 and a 2024 figure of 96.6, according to Insurance Journal's report on their results (published March 26, 2026), which is close to the NAIC's 96.9 for 2024 but not identical.

The averages hide a lot. The NAIC report says the personal lines market's combined ratio improved to 89.1 percent in 2025 from 96.0 percent, and that personal auto liability's loss-only measure (its "pure net loss ratio") was 68.1 percent while personal auto physical damage's was 52.6 percent. Commercial liability lines told a different story, with social inflation, meaning claim costs rising faster than general inflation, still pressuring reserves. An insurer's own ratio should be compared with the lines it writes, not with the all-industry number.

What a combined ratio above 100 means

A combined ratio of 100 means that for every premium dollar earned, the insurer spent one dollar on claims, claim handling and expenses. At 103 it spent $1.03 and lost three cents on underwriting. At 92.9, as the industry did in 2025, it kept about seven cents.

Say a hypothetical insurer earns $1,000 million in premium in a year, with a 72 percent loss ratio and a 30 percent expense ratio. Its combined ratio is 102, so it loses $20 million on underwriting. If its investment portfolio earns $45 million, its overall result is a $25 million gain. That is why an insurer can run a combined ratio near or slightly above 100 and still earn money: investment income supplies part of the profit.

A combined ratio above 100 is not by itself a warning of failure. What matters is how long it lasts, how far above 100 it goes, and whether surplus is shrinking as a result. A company at 108 for one hurricane-heavy year with a thick surplus is in a different position from one at 104 for four straight years with thin surplus.

The NAIC report adds the investment side of the picture for 2025: net investment income earned rose 4.2 percent to $88.9 billion across the industry, mostly from bonds, and the industry's net income was $150.6 billion. Verisk and the APCIA put the industry's net underwriting gain at $63 billion for 2025, compared with $23 billion for 2024. Those figures show how much of an insurer's earnings can come from the investing side, and how fast the underwriting side can swing.

Premium-to-surplus leverage

The combined ratio tells you how a year went. Premium-to-surplus leverage tells you how much risk is sitting on the cushion. It compares the premium an insurer writes with the surplus available to absorb mistakes. The more premium per dollar of surplus, the less room there is for a bad year, a reserve increase or a catastrophe.

A hypothetical example: a regional insurer writes $600 million in net premium and holds $240 million in surplus. Its net premium to surplus ratio is 2.5 to 1, or 250 percent. A year with a 15 percent worse loss ratio costs about $90 million, which is 37.5 percent of surplus. A competitor writing the same premium with $600 million of surplus (1 to 1) would lose only 15 percent of its cushion in the same year.

The NAIC publishes a screening tool for regulators called the Insurance Regulatory Information System (IRIS). The 2025 property and casualty tables, dated May 19, 2026, cover 2,647 companies and include two leverage tests: gross premium to surplus, flagged as unusual at 900 percent or more, and net premium to surplus, flagged at 300 percent or more. Net means after reinsurance, so an insurer that passes much of its risk to reinsurers (see reinsurance) can write more premium on the same surplus, but it then depends on the reinsurers paying. The IRIS tables also flag a change in net premium written of 33 percent up or down in a year, since fast growth and fast shrinkage both strain a company. The IRIS means and medians publication lists all 13 property and casualty tests, and a flag is a prompt for a regulator to look closer, not a finding.

For context, the NAIC says the industry's net writings leverage ratio improved to 77.3 percent in 2025 and has been near or below 80 percent for over fifteen years. Most insurers operate well inside the IRIS limit. Leverage that sits far above the industry's, or that climbs year after year, deserves the questions in the checklist below.

Reserve development: the number that can change last year's result

An insurer's reserve is its estimate of what it still owes on claims that have happened but are not fully paid. Auto liability claims, especially injury claims, can take years to settle, so the estimate is revised as facts arrive.

Reserve development is the change in the estimate for prior years. If last year's claims turn out cheaper than reserved, the insurer releases the excess and this year's results improve ("favorable" or "redundant" development). If they turn out costlier, it must add to reserves and this year's results worsen ("adverse" development). Adverse development is a signal that prior years' profits were overstated. That is why regulators track it: the IRIS tests include one-year and two-year reserve development to surplus (both flagged at 20 percent or more) and an estimated current reserve deficiency to surplus (flagged at 25 percent or more).

The NAIC reports that the industry benefited from prior-year reserve releases in 2025, with a one-year redundancy of $20.0 billion and a two-year redundancy of $13.5 billion. It follows several years in which adverse development in commercial liability lines, driven by economic and social inflation, had reduced those releases. A favorable 2025 therefore partly reflects reserves that were set conservatively earlier. If a company's combined ratio looks excellent but a large share of the improvement comes from releasing old reserves, the underlying year was weaker than the headline.

For car insurance specifically, the useful questions are whether the insurer's personal auto liability reserves have been developing favorably or adversely, and whether it writes commercial auto or other liability lines whose reserves have been under more pressure.

Investment income: the cushion under the ratios

Insurers collect premium up front and pay claims later, and in between they invest the money, mostly in high-quality bonds so cash is available for claims. The NAIC says the industry's investment income in 2025 came primarily from bonds and that portfolios are conservatively managed to keep cash available for claims. Industry investment yield was about 3.6 percent in 2025 per the snapshot.

Investment income explains why an insurer can sit at a combined ratio of 100 to 103 and still earn money. It also explains why rising interest rates help insurers and why a poor investment year, or a drop in bond values, can reduce surplus even when underwriting is fine. The NAIC notes that net income fell 10 percent in 2025 even though underwriting income jumped, because realized investment gains dropped. When you look at a company, check whether its profit came from underwriting or from investment gains, because only underwriting profit is a sign that its pricing works.

Where to find the numbers

Every U.S. insurer files an annual statement on the NAIC's standard form with the insurance department of its home state. The form contains the balance sheet (including surplus and reserves), the income statement, the underwriting and investment exhibit, and Schedule P, which shows how reserves for past years have developed. Access for consumers varies by state, so the practical routes are:

1. Confirm the exact company. A brand such as a national auto insurer is a group of legal entities, and each files its own statement. The declarations page of your policy names the one that insures you (see which legal entity actually insures you: reading your policy documents).
2. Check the company's rating. An agency rating packages the same data into a letter grade (see AM Best financial strength ratings explained). It is a shortcut to the analysis in this article, not a substitute for it.
3. Ask the regulator. The department of insurance in the insurer's home state can tell you what financial filings it releases and how. The NAIC's Consumer Insurance Search is the place to find the correct legal name and see report options for a company.
4. Look at the parent's public filings. A publicly traded parent usually files audited GAAP reports with the Securities and Exchange Commission, which are easier to read than the statutory forms but measure surplus differently.
5. Use the industry snapshot as a yardstick. The NAIC's snapshot is a one-page summary of the industry's premium, loss ratio, expense ratio, combined ratio, investment income, net income and surplus. A company's own one-page summary can be read the same way.

A checklist for reading one company

Use this list on any company's numbers, and compare each answer with the industry and with the same company's prior years:

• What was the combined ratio for each of the last five years? A single year tells you little.
• Is the loss ratio rising or falling? Was the change driven by catastrophes, claim costs or pricing?
• How does the expense ratio compare with similar companies? A high expense ratio can reflect agent commissions or a small premium base.
• What is net premium to surplus, and how has it moved? Rising leverage with a thin cushion is the pattern to question.
• Has the company grown or shrunk by more than about a third in a year?
• Has reserve development been favorable or adverse, and how large is it compared with surplus?
• Did earnings come from underwriting or from investments?
• Is the company part of a group that can add capital if needed?

Why ratios say more about solvency than claims service

These numbers answer a narrow question: can this company pay what it owes? A rating agency says as much. AM Best's Guide to Best's Financial Strength Ratings states that its rating does not address an insurer's claims-payment policies or procedures. The same limit applies to the ratios.

A low loss ratio can mean accurate pricing, or it can mean strict claim handling; a high one can mean generous payments or underpricing. The ratios cannot tell you which. A company with a strong surplus can still be slow, and a thin one can be fair when it pays. For service quality, look at complaint data (see The NAIC explained and our guide to loss ratios and rate filings: how insurers justify an increase for how loss ratios feed rate requests), and for solvency, use the ratios. They answer different questions, and neither answers price.

If a company does fail, state guaranty funds step in for covered claims up to statutory limits (see what happens if your car insurer goes insolvent), and regulators try to intervene early; our article on risk-based capital: how regulators spot a failing insurer early explains how.

Common questions

Is a combined ratio above 100 bad for me as a policyholder?

Not necessarily. It means underwriting lost money that year, which investment income may offset. Look at the trend and the surplus. A long run above 100 with shrinking surplus is the worrying combination, and it is also a reason an insurer may raise rates.

Which is better, a large surplus or a low premium-to-surplus ratio?

The ratio, because it compares the cushion with the risk written. A large insurer can have a huge surplus and still be heavily leveraged. A small company with a modest surplus and low leverage can have more room per dollar of premium.

Where do ratings fit in?

Ratings summarize these same data plus management quality and business profile, in a letter. They are quicker to check, and they carry a date, so read the date. See Financial strength ratings compared: AM Best, S&P, Moody's, Demotech for how the main agencies differ.

Does a profitable insurer pay claims better?

Not by that evidence alone. Profit shows pricing and expense discipline; it does not show how fair or fast claim handling is.

Key takeaways

• Policyholder surplus is a statutory cushion (admitted assets minus liabilities), not profit and not the same as GAAP equity.
• Combined ratio is loss ratio plus expense ratio plus dividends; below 100 is an underwriting profit. The NAIC put the industry at 92.9 percent for 2025, down from 96.9 percent in 2024.
• Premium-to-surplus leverage shows how much risk sits on the cushion. The NAIC's IRIS screen flags net premium to surplus of 300 percent or more.
• Reserve changes and investment income can make a year look better or worse than the underwriting really was.
• These ratios speak to solvency, not to claims service. Use complaint data for service, and compare several years against the industry.