Core insurance workflows, explained
A plain-English guide to how an insurance company actually works — the value chain, then the three analytical core workflows (underwriting, claims, actuarial) plus distribution — each with a worked example and the key terms. It's the same work InsureBench measures AI models on; every statistic is sourced.
The insurance value chain
An insurer is a sequence of workflows that turn a customer's risk into a priced promise and, eventually, a paid claim. Industry models from McKinsey and others describe a consistent chain — with actuarial and reinsurance running across all of it as support functions.1
Product
Design the coverage and policy wording.
Distribution
Reach customers via agents, brokers, or direct.
Underwriting
Assess the risk, price it, decide to cover.
Policy admin
Issue, service, endorse, renew.
Claims
Investigate, value, and pay losses.
Cross-cutting throughout: actuarial (pricing & reserving), reinsurance (risk & capital), investments, and technology.
Underwriting
Underwriting is how an insurer decides whether to take a risk and at what price. A submission moves from intake through risk assessment, rating, and a decision — bind, modify, or decline. Authority is tiered: junior underwriters handle clean, in-appetite cases, while unusual or large risks are referred up to a senior underwriter before they can be bound.2
Submission & intake
A broker or agent submits the risk: the business, the property or exposure, and the loss history. The insurer logs it and checks line-of-business fit.
Risk assessment
For property, underwriters weigh COPE — Construction, Occupancy, Protection, Exposure — alongside loss history and catastrophe risk.3
Apply guidelines & appetite
Check the risk against the insurer's appetite, capacity limits, and referral triggers; sort it into a risk class.
Rating & pricing
Apply rate factors to the exposure to compute a premium that covers expected losses plus expenses and profit.
Decision: bind, modify, refer, or decline
Accept (sometimes with added terms or exclusions), refer up if beyond authority, or decline.
Quote, bind & issue
Issue the quote; a binder gives temporary cover; the formal policy follows, with post-bind inspection and renewal.
"Maple Lane Goods" applies for commercial property cover
- The risk: an owner-occupied masonry retail shop, with a fire department and hydrant on the block.
- Assess via COPE: masonry construction (less combustible), low-hazard retail occupancy, good protection, modest neighbouring exposure — plus a clean loss history.3
- Total insurable value: $750k building + $150k contents = $900k.
- Price by rate-per-$100: base rates commonly run $0.30–$0.80 per $100. At $0.55: $900,000 ÷ 100 × $0.55 = $4,950/yr.4
- Terms: $1,000 deductible, 80% coinsurance, standard flood/earthquake exclusions.
- Decision: clean record + sound construction → bind within authority. A coastal cat zone or poor loss history → refer up or decline.
Where it goes wrong
- Adverse selection — high-risk applicants buy disproportionately when the insurer can't see the full picture.6
- Underpricing — a small rate error, compounded across thousands of policies, erodes the combined ratio.
- Missing data — submissions arrive as inconsistent PDFs; a mistyped ZIP or undisclosed use can flip a "clean" risk.
- Loss ratio — incurred losses ÷ earned premium.
- Combined ratio — loss + expense ratio; under 100% is an underwriting profit (US P&C was 96.5 in 2024).7
- Risk appetite — the risk an insurer is willing to accept.
- Binding authority — delegated authority to commit cover.
Where AI fits. Accenture's 2025 survey of 430 underwriting executives found more than a third of an underwriter's time goes to non-core admin and data collection, and insurers expect AI use in underwriting to climb from 14% today to 70% within three years.8 See the underwriting AI benchmark.
The claims lifecycle
A claim runs from the first report of a loss to final payment and recovery. The consumer-facing flow is straightforward; the industry mechanics — reserving, loss-adjustment expense, subrogation — sit underneath it.9
First Notice of Loss (FNOL)
The policyholder reports the loss, opening the claim and triggering everything downstream.
Triage & assignment
The claim is categorised by severity and complexity and routed to the right adjuster.
Investigation & coverage determination
The adjuster verifies what happened and whether the policy responds — working through exclusions and conditions.
Reserving
The insurer books a reserve: its best estimate of the ultimate cost of the open claim, revised as facts firm up.
Valuation & settlement
Damages are valued (replacement cost vs. actual cash value), then approved, negotiated, and paid — minus the deductible.
Subrogation & closing
If a third party was at fault, the insurer recovers from them; the file is then settled and closed.
A homeowner's water-damage claim (HO-3, $2,500 deductible)
- FNOL: a burst sink supply line floods the first floor. The owner stops the water, photographs the damage, and files via the app.
- Coverage: sudden & accidental discharge is covered; gradual leaks usually aren't — a frequent dispute point.
- Reserve: the adjuster books ~$28k structure + $4k contents + a small expense reserve.
- Valuation: structure on replacement cost ($26k to rebuild); contents at actual cash value (a $1,500 sofa depreciated to $700).
- Payout: many insurers pay ACV first ($26k − $6k depreciation holdback = $20k, − $2,500 deductible = $17,500), releasing the held-back depreciation once repairs are proven.
- Subrogation: if a plumber installed the failed line, the insurer recovers from the plumber's liability carrier.
Where it goes wrong
- Coverage disputes — sudden vs. gradual, wear-and-tear, flood-vs-water exclusions.
- Reserve adequacy — under-reserving overstates profit; over-reserving ties up capital.
- Claims leakage & fraud — the Coalition Against Insurance Fraud estimates fraud in about 10% of P&C losses.10
- FNOL — the policyholder's first loss report.
- Reserve — money set aside as a liability for an open claim.
- LAE — loss-adjustment expense; the cost of investigating/settling.
- Subrogation — recovering paid losses from the at-fault party.
- ACV vs RCV — depreciated value vs. cost-new.
Where AI fits. Cycle time is the pain point: J.D. Power's 2025 study found the average home claim now takes more than 44 days from notice to payment — the longest since 2008 — and satisfaction drops sharply past 31 days.11 See the claims AI benchmark.
Actuarial work: pricing & reserving
Actuaries are the quantitative core. Pricing actuaries estimate the cost of risk before a policy is sold (expected claims = frequency × severity, plus expenses and profit), usually via Generalized Linear Models.12 Reserving actuaries work the other direction: estimating, after policies are written, how much to hold today for claims that have occurred but aren't fully paid.13
Setting reserves with a chain-ladder triangle
Cumulative paid losses ($000s) by accident year and development age. The pattern of past years projects the immature ones to their ultimate cost.
| Accident year | 12 mo | 24 mo | 36 mo | 48 mo |
|---|---|---|---|---|
| 2022 | 1,000 | 1,500 | 1,650 | 1,700 |
| 2023 | 1,200 | 1,800 | 1,980 | 2,039 |
| 2024 | 1,100 | 1,650 | 1,869 | 1,925 |
| 2025 | 1,300 | 1,950 | 2,145 | 2,210 |
- Age-to-age factors from the mature years: 12→24 = 1.50, 24→36 = 1.10, 36→48 = 1.03.
- Project ultimates by chaining the factors: 2025's $1,300 × 1.70 ≈ $2,210 (highlighted).
- Reserve / IBNR = projected ultimate − losses reported so far ≈ $1,188k held today, across all years.
Where it goes wrong
- Reserve strengthening — worse-than-expected development forces top-ups that hit earnings; long-tail casualty has seen sustained adverse development.
- Leverage on thin data — the most recent year's ultimate can rest on a single data point times a large factor.
- Model risk — GLM rates only hold while historical relationships persist.
- Case reserves — claim-by-claim estimates of what's left to pay.
- IBNR — reserves for claims incurred but not (fully) reported.14
- Loss development factor — the ratio that ages losses toward ultimate.
- GLM — the standard statistical pricing model.
The role is growing. The US Bureau of Labor Statistics projects actuary employment to grow 22% from 2024–2034 (median wage $125,770), far faster than average.15 See the actuarial AI benchmark.
Distribution: how policies reach customers
Before any of the above, the policy has to be sold. Insurers reach customers through several channels, each with different economics and incentives.16
Captive agents
Sell for a single insurer, who owns the book of business.
Independent agents & brokers
Place business across multiple carriers; brokers represent the client and generally can't bind directly.
Direct / online
Sold straight to consumers with no intermediary commission.
MGAs
Hold delegated underwriting authority — "the pen" — to bind and issue on a carrier's behalf.
A bakery buys cover through an independent agent
- The owner calls a local agency; the agent gathers building/contents values, location, and loss history.
- The agent markets the risk to three carriers and brings back the best Business Owner's Policy at ~$4,000/yr.
- The carrier underwrites (and may inspect), then the agent binds cover on the effective date and the carrier issues the policy.
- The agent earns commission — roughly 12–20% for new business; at 15% that's ~$600 in year one.
The independent agency channel still dominates US commercial insurance: it placed 61.5% of all US P&C premium in 2024 (87.2% of commercial lines), of a $1.05 trillion market.17
Sources
- McKinsey — Insurance productivity 2030 (value chain). mckinsey.com
- Insurance Information Institute — Glossary (underwriting, unearned premium). iii.org
- IRMI — COPE (construction, occupancy, protection, exposure). irmi.com
- Insureon — Commercial property insurance cost. insureon.com
- NEXT Insurance — What is coinsurance? nextinsurance.com
- IRMI — Adverse selection. irmi.com
- Carrier Management — 2024 US P&C combined ratio 96.5 (S&P Global). carriermanagement.com
- Accenture — Underwriting, rewritten (Aug 2025). accenture.com
- Insurance Information Institute — How to file a homeowners claim. iii.org
- Coalition Against Insurance Fraud — Fraud statistics. insurancefraud.org
- J.D. Power — 2025 US Property Claims Satisfaction Study. jdpower.com
- Casualty Actuarial Society — Basic Ratemaking / GLMs (Monograph 5). casact.org
- CAS Student Central — What a reserving actuary does. casstudentcentral.org
- Milliman — A beginner's guide to casualty actuarial language (IBNR). milliman.com
- U.S. Bureau of Labor Statistics — Actuaries (Occupational Outlook). bls.gov
- Insureon — Insurance agent vs. broker. insureon.com
- Insurance Journal — Big "I" 2025 market share report (independent agents, 2024). insurancejournal.com