Homeowners Insurance Basics: How a Standard Policy Works

A homeowners policy is one contract that does two jobs: it pays to repair or rebuild your home after a covered loss, and it protects your savings if someone is injured on your property. Most U.S. homeowners carry the same policy form — the HO-3, the “special form” that covers the structure against any cause of loss except those the policy specifically names. Knowing what that policy includes, and where it stops, is the difference between a claim that pays and a surprise at the worst possible time.

The six coverages in a standard policy

Every HO-3 is built from six standard parts. They are labeled A through F across the industry, so the letters carry over from one insurer to the next.

  • Coverage A — Dwelling. The house itself: structure, roof, built-in systems. Sized to replacement cost — what it costs to rebuild, not the market price or what you paid.
  • Coverage B — Other Structures. Detached structures: a garage, fence, or shed. Usually set at about 10% of Coverage A.
  • Coverage C — Personal Property. Your belongings — furniture, electronics, clothing. Typically 50–70% of Coverage A. High-value items like jewelry have sub-limits and often need a separate rider.
  • Coverage D — Loss of Use. Hotel, meals, and extra living costs if a covered loss forces you out while the home is repaired.
  • Coverage E — Personal Liability. Pays if you’re found responsible for someone else’s injury or property damage, including legal defense.
  • Coverage F — Medical Payments. Smaller no-fault amount for a guest’s medical bills, regardless of who was at fault.

Replacement cost vs. actual cash value

How a claim pays out depends on two words in your policy. Replacement cost value (RCV) pays to replace the item with a new equivalent. Actual cash value (ACV) pays replacement cost minus depreciation — so a 15-year-old roof pays out as a 15-year-old roof. RCV costs more in premium and pays far more at claim time. Read which one applies to your dwelling and, separately, to your contents.

The 80% rule (why under-insuring backfires)

Insurers expect you to carry dwelling coverage equal to at least 80% of your home’s replacement cost. Fall below that line — the coinsurance or 80% rule — and the insurer can reduce even a small partial claim proportionally. Insuring to full replacement cost avoids the penalty entirely. This is the single most common way owners discover, mid-claim, that they were under-covered. Estimate how much coverage you need →

What a standard policy does not cover

Two big perils are excluded from every standard HO-3 and need separate coverage:

  • Flood. Not covered, period. Flood insurance is a separate policy through the National Flood Insurance Program (NFIP) or a private insurer; NFIP caps building coverage at $250,000 and contents at $100,000. See flood insurance vs. homeowners insurance for which you need.
  • Earthquake. Excluded by default; added by endorsement or a standalone policy in higher-risk states.

Routine wear, neglect, pest damage, and normal maintenance are also excluded — insurance covers sudden, accidental loss, not deferred upkeep.

What it costs, and why it’s in your mortgage payment

The U.S. average annual premium for an HO-3 policy is roughly $1,569 (2022 NAIC Homeowners Insurance Report, published 2025); current-year premiums run higher, and your number swings widely with location, rebuild cost, claims history, and deductible. If you have a mortgage, the lender requires coverage and usually collects it monthly through your escrow account, then pays the insurer when the bill comes due. Premiums vary enormously by state — see average home insurance cost by state.

Frequently Asked Questions

Is homeowners insurance required?

Not by law, but a mortgage lender requires it as a loan condition and typically collects the premium through your escrow account.

Does homeowners insurance cover floods?

No — a standard policy excludes flood damage. Flood coverage is bought separately through the NFIP or a private insurer.

How much coverage do I need?

Enough to fully rebuild your home (Coverage A at replacement cost) and to protect your assets on the liability side. Use our coverage calculator guide to size it.

Sources

  • National Association of Insurance Commissioners (NAIC), Homeowners Insurance Report (2022 data, published 2025) — average premium by state and policy form.
  • Insurance Information Institute (III) — homeowners insurance basics & policy structure (HO-3 / Coverage A–F).
  • FEMA — National Flood Insurance Program coverage limits ($250,000 building / $100,000 contents).
  • ISO HO-3 “special form” policy structure — standard industry coverage parts A–F and the 80% coinsurance provision.