The single most consequential number on a self-insured balance sheet, explained without actuarial jargon.
Plain-English explainers on reserving methodology. A dated feed of what's actually moving loss development this quarter. Written for the CFOs, captive boards, and risk officers who own the number, not just the actuaries who calculate it.
By Sam, EditorBegin with the fundamentals.
Loss Reserves Explained: What They Are, How They Are Calculated, and Why They Matter
A loss reserve is the dollar estimate of what an insurer, captive, or self-insured entity still owes on claims that have already happened. Here is what sits inside that number, how actuaries arrive at it, and why it moves after you book it.
Read the explainerWhat's catching our eye this month.
Filter the feed by line of business or by reserving discipline.
Lockton: Stop-Loss Renewals Could Hit 30% for 2027
Lockton's Q3 2026 market update puts 2027 stop-loss renewal increases at up to 30%, but the reserve story is not the premium: carriers are repricing attachments on less current data, which means self-funded plans holding deductibles flat are quietly retaining more severity than their IBNR assumes.
Marsh Q3 Index: Excess Casualty Jumps 13% as WC Falls 5%
Marsh's Q3 2026 Global Insurance Market Index shows US excess and umbrella casualty rates up 13% while workers' comp rates fell 5%, the widest spread between the two lines this year and the first quarter where the gap stopped narrowing. Falling WC premiums reflect calendar-year profits and carrier competition, not falling loss costs; self-insureds who let soft renewal quotes drive trend selection will underfund the retained layer while excess carriers price a 9.5 to 12% severity trend.
DC Captive Reform Would End Prior Dividend Approval
DC's Captive Insurance Company Amendment Act of 2026 would let pure captives and protected cells pay dividends on board approval plus 30 days' notice, replacing the regulator's prior sign-off. The external check that declared surplus was genuinely redundant now falls entirely on the captive's own actuarial opinion and board diligence.
Yale New Haven's Third Verdict in a Year Hits $54.8M
Three malpractice verdicts and judgments totaling roughly $54.8 million have landed against Yale New Haven Hospital in under 10 months, and the clustering itself is the reserve signal: for a self-insured hospital, three large losses at one institution across unrelated service lines gives institution-specific severity enough actuarial credibility to outweigh industry benchmarks in tail factor and case reserve selection.
New Mexico's $47M Verdict: Nuclear Severity, No Fatality
A Rio Arriba County jury awarded $47 million to a 21-year-old who will need round-the-clock care for life after a 2022 tanker crash, against a $100,000 pretrial offer. The reserve lesson: catastrophic nonfatal injury, projected over a multi-decade life-care horizon, now out-severs fatality claims, and case reserves anchored to early settlement posture are the ones that miss it.
SIIA Survey: Medical Stop-Loss Is Now Captives' Growth Engine
SIIA's sixth annual captive survey shows demand concentrating hard in medical stop-loss, with 91.3% calling renewal pricing predictable; the argument here is that predictability is a reserving claim, and captives growing fastest into MSL are the ones whose reserve basis is thinnest.
IBNR, Explained Without the Jargon
What incurred-but-not-reported really means, why it is almost always the largest piece of a self-insured entity's reserves, and how to read an IBNR estimate without being an actuary.
Pure IBNR vs. Broad IBNR: Why the Distinction Matters More for Self-Insureds
The IBNR line on your actuarial report bundles two very different uncertainties into one number; understanding which piece is driving the estimate changes what you should ask and how you should fund.
How to Read a Loss Development Triangle
A loss triangle looks like a spreadsheet with a staircase cut out of it. Here is what the rows, columns, and diagonals are telling you, and what to look for before you trust the projection on the bottom line.
Point Estimate vs Range: Which One Should a Self-Insured Book?
A single-number reserve looks decisive. A range looks honest. The right choice depends on what you are using the estimate for, and the answer is rarely the middle of the range.
What a Reserve Review Should Cost: A Buyer's Guide to Actuarial Fees
Fee ranges by program type, the scope levers that move price up and down, and the red flags in a quote that looks too cheap or too expensive.
How to Write an RFP for a Reserve Review: A Buyer's Template
The sections an RFP actually needs, the data package to send with it, and what to leave out so the proposals you receive are comparable and the engagement runs clean.
IBNR for Public Entity Pools and JPAs: A Plain-English Guide for Pool Administrators and Member Finance Officers
What IBNR means for a public entity risk pool or joint powers authority, how actuaries handle member allocation and sovereign immunity, and what to require in the annual reserve study.
Commercial Auto and Fleet IBNR for Self-Insured Trucking, Delivery, and Transit
How actuaries estimate unpaid auto liability claims for self-insured fleets, why bodily injury severity dominates the reserve, and what to require in the report.
Hospital and Health System Professional Liability IBNR
How actuaries estimate unpaid medical professional liability claims for hospitals and health systems, why the captive structure creates a net-exceeds-gross wrinkle, and what to require in the report.
Public Entity General Liability IBNR: Municipalities, Schools, and Special Districts
How actuaries estimate unpaid general liability claims for public entities, why latent exposures and revival windows make the tail longer than it looks, and what to require in the report.
Workers Compensation IBNR for Self-Insured Employers
How actuaries estimate unpaid workers compensation claims for self-insured programs, what drives the number, and what to require in the report.
IBNR for Self-Funded Health Plans: A Plain-English Guide for Benefits CFOs and HR Directors
What IBNR means for a self-funded employer health plan, how actuaries estimate it, and what to expect from a reserve study.
Reading Your Captive's Annual Reserve Report: A Board Member's Guide
What a captive board member should read in the annual reserve report and Statement of Actuarial Opinion, the questions to ask the actuary, and the gross-ceded-net bridge every captive board must understand.
Captive Feasibility Studies: What the Actuary Contributes Before the Captive Exists
What the actuary contributes to a captive feasibility study: the pro forma loss pick, exposure base selection, retention analysis, confidence level capital sizing, and what the buyer should require from the report.
Captive Funding at a Confidence Level: How the Percentile Selection Drives the Capital Number
How actuaries fit aggregate loss distributions and select confidence levels for captive funding, why the variance assumption can drive the answer more than the chosen percentile, and what to require from the actuary's report on the funded amount.
Discounting Captive Reserves: Statutory, Tax, GAAP, and IFRS Compared
Why a captive's statutory, tax, GAAP, and IFRS reserve values differ for the same liabilities, how the discount is constructed in each framework, and what the board should require for reconciliation.
Cell Captives and Protected Cell Companies: How the Structure Changes the Reserving Problem
What a cell captive and a protected cell company actually are, how statutory ring-fencing affects reserving and capital sizing, and what to require from the actuary's report on a cell's reserve.
Loss Portfolio Transfers, Adverse Development Covers, and Captive Runoff: How Captives Close Out Retained Risk
How loss portfolio transfers, adverse development covers, and runoff work for captive insurers, the actuarial inputs that drive pricing, and what to require from the actuary during the transaction.
Claims Analytics and Loss Reduction: How Operational Data Lowers Future IBNR
What claims analytics actually is, how it differs from actuarial reserving, and the operational interventions that measurably reduce future losses for self-insured employers, captives, and risk pools.
Five Leading Indicators of Adverse Reserve Development: What Your TPA Already Tracks That Your Actuary May Not See
The five claim-level metrics that predict adverse reserve development 6 to 18 months before it shows up in your actuarial report, and how to ask your TPA for them.
What's Actually Driving Your IBNR Higher? A Claim-Level Diagnostic Guide for Risk Managers and CFOs
How to diagnose whether your adverse reserve development is coming from case reserves, payment patterns, or claim mix, and what to do about each one.
When Self-Insured Reserves Hit the Financial Statements: ASC 450, ASC 944, and What the Auditor Is Actually Evaluating
The GAAP accrual rules for self-insured losses, how a range with a best estimate gets treated differently from a range without one, and what the external auditor is trying to conclude when they review your reserve number.
Audit Committee Reserve Governance: The Five Questions Every Committee Should Ask
What the audit committee needs to see on reserves, the five questions that should be asked every year, and how a CFO or risk manager prepares the packet that turns a technical topic into a governance conversation.
What Captive Domicile Regulators Look At: A Finance Officer's Survey of Vermont, Cayman, Bermuda, South Dakota, and Utah
What each major domicile actually examines in the annual filing, the reserve review requirements, solvency triggers, and what 'regulated but light' means in practice. For anyone choosing a domicile or considering a re-domicile.
Collateral and Surety for Self-Insured Workers Compensation: How Reserves Drive the Bond You Have to Post
How state workers comp bureaus set collateral requirements, why the number often exceeds the actuarial reserve, and how to negotiate with the bureau when the requirement feels disconnected from your actual exposure.
The §832 Deduction: What Makes Your Captive's Reserves Tax-Deductible
The risk shifting and risk distribution tests, what the IRS actually evaluates, how reserve methodology ties to deductibility, and what recent micro-captive rulings mean for conventional captive owners.
How Actuaries Estimate Your Unpaid Claims: A Buyer's Guide to the Five Core Methods
Every reserve estimate starts from one equation and five methods. Here is what each method assumes, when it works, when it breaks, and which one your actuary probably leaned on for the number you are signing off on.
Chain Ladder: How Actuaries Project Claims From Historical Patterns
The chain ladder is the most widely used reserving method, and the one most likely to produce the number on your balance sheet. Here is how it works, what it assumes, and where it fails.
Bornhuetter-Ferguson: The Method That Balances Past Data and Prior Expectation
BF blends the chain ladder's development pattern with an expected claim ratio, weighted by maturity. Here is how it works, what it assumes, and why it is the natural default for your most recent accident years.
Fronting, Reinsurance, and Why Your Captive's Net IBNR Can Exceed Gross
How gross, ceded, and net reserves should bridge in a fronted captive, why net IBNR can sometimes exceed gross, and the six questions to ask about your actuary's gross-to-net bridge.
Berquist-Sherman in Plain English
When your claims operation changes mid-stream, the historical triangle lies. Berquist-Sherman is the standard correction, and you should know what it does, what it assumes, and when to demand it.
The Expected Loss Ratio Method: Reserving When Your Data Cannot Speak Yet
The expected loss ratio method sets ultimate losses from an expectation instead of from claim experience. Here is where that expectation comes from, when ignoring your own data is the right call, and how to challenge the one assumption doing all the work.
The Reserving Briefing.
One email a week for self-insureds and captives. Reserving fundamentals, method notes, and commentary on what's actually moving loss development this quarter.