This is the question that trips up almost everyone, and getting it wrong is expensive in both directions. Buy too little and a serious loss leaves you paying tens of thousands out of pocket. Buy too much and you're throwing money at premiums for coverage you'll never use. The good news: there's a logical way to figure out the right number for each part of your policy, and once you understand the framework it's not complicated.

Let's walk through each coverage type, what it should be set to, and the costly mistakes people make along the way.

The Mistake That Underinsures Almost Everyone

The single biggest error is confusing your home's market value with its rebuild cost. They are not the same thing, and your insurance should be based on rebuild cost.

Market value includes the land your house sits on. Insurance doesn't cover land — if your house burns down, the dirt is still there. So in expensive markets, your rebuild cost might be far lower than market value. But here's the twist: with construction costs and labor still elevated in 2026, rebuild cost in many areas has climbed sharply, and homes insured years ago at outdated figures are now badly underinsured. Either way, the lesson is the same: insure to rebuild, not to sell.

Coverage A: Dwelling — The Foundation of Your Policy

Dwelling coverage pays to rebuild the physical structure. It should equal the full cost to reconstruct your home at today's prices.

  • Quick estimate: local rebuild cost per square foot × your home's square footage. Depending on region and finishes, that's roughly $150–$400 per square foot in 2026.
  • Better estimate: ask your insurer to run a replacement-cost estimator, or hire an independent appraiser for a high-value or custom home.

Add extended or guaranteed replacement cost

After a widespread disaster, building costs spike from demand surge, and your dwelling limit may fall short. Two add-ons fix this:

  • Extended replacement cost pays an extra cushion (often 25–50%) above your dwelling limit.
  • Guaranteed replacement cost pays whatever it actually costs to rebuild, with no cap. It's the gold standard if you can get it.

Coverage B: Other Structures

This covers detached structures — garage, shed, fence, gazebo. It defaults to 10% of your dwelling limit. If you have a big detached garage, a workshop, or extensive fencing, that 10% may not be enough. Add up what those structures would cost to rebuild and bump the limit if needed.

Coverage C: Personal Property

This covers your belongings and defaults to roughly 50–70% of your dwelling limit. The question is whether that default actually matches what you own. The only honest way to know is to do a home inventory — most people dramatically underestimate the replacement cost of everything in their house until they list it room by room.

Replacement cost vs. actual cash value matters here

Make sure your personal property is covered at replacement cost, not actual cash value. The difference is huge: ACV pays the depreciated value of your 8-year-old couch (maybe $200), while replacement cost pays what a new equivalent costs (maybe $1,200). See our full breakdown of replacement cost vs. actual cash value.

Watch the sub-limits

Even with plenty of personal property coverage, specific categories have caps — typically $1,500–$2,500 for jewelry, $2,500 for firearms, limited amounts for cash and collectibles. If you own valuable items, schedule them with a separate jewelry and valuables rider.

Coverage D: Loss of Use

If a covered loss makes your home unlivable, this pays for temporary housing, restaurant meals above your normal grocery budget, and other additional living expenses. It defaults to about 20–30% of dwelling coverage. For a major rebuild that takes 6–12 months, that money goes fast — make sure the limit is realistic for how long you might be displaced and how expensive temporary housing is in your area.

Coverage E: Liability — Don't Skimp Here

Liability protects you if someone is injured on your property or you damage someone else's property and get sued. Standard policies start at $100,000, but that's dangerously low. Most experts recommend at least $300,000–$500,000, and if you have meaningful assets, an umbrella policy adds $1 million or more for surprisingly little money (often $200–$400 a year for the first $1 million).

Coverage F: Medical Payments

This pays minor medical bills for guests injured on your property regardless of fault — usually $1,000–$5,000. It's cheap and helps resolve small injuries without escalating into a liability lawsuit. Bumping it to $5,000 costs very little.

A Worked Example

Say you own a 2,200 sq ft home, rebuild cost $250/sq ft:

  • Dwelling (A): 2,200 × $250 = $550,000, plus extended replacement cost cushion.
  • Other structures (B): $55,000 (10%), increased if you have a large detached garage.
  • Personal property (C): ~$330,000 (60%), adjusted to your home inventory total.
  • Loss of use (D): ~$110,000–$165,000.
  • Liability (E): $500,000, plus a $1M umbrella.
  • Medical payments (F): $5,000.

How Your Deductible Fits In

Coverage limits set your maximum payout; your deductible sets what you pay before insurance kicks in. A higher deductible lowers your premium but raises your out-of-pocket cost per claim — a tradeoff we cover in detail in raising your deductible: pros and cons. Set limits based on rebuild and replacement needs first, then tune the deductible to balance premium and risk.

Frequently Asked Questions

Should I insure my home for what I paid for it?

No. Insure it for what it would cost to rebuild today, which can be higher or lower than your purchase price and is unrelated to current market value.

How often should I update my coverage?

Review it every year at renewal, and immediately after any major renovation, addition, or significant purchase. Construction-cost inflation alone can leave you underinsured within a few years.

What happens if I'm underinsured at claim time?

Many policies have a coinsurance clause requiring you to insure to at least 80% of replacement cost. If you fall below that, the insurer can pay even partial claims at a reduced rate — so being underinsured can hurt you even on a non-total loss.

Can I lower my coverage to save money?

Lower your premium by raising your deductible or improving your home's risk profile — not by under-insuring the structure. Cutting your dwelling limit below rebuild cost is how a recoverable disaster turns into financial ruin.

The Bottom Line

The right amount of homeowners insurance starts with rebuild cost for your dwelling, a realistic inventory for your belongings at replacement cost, and liability limits high enough to protect your assets. Add extended replacement cost so a demand surge doesn't leave you short, schedule your valuables, and revisit the whole thing every year. Set those numbers correctly and you've covered the scenarios that actually bankrupt people.