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Underinsurance in Australia: how to check your home and contents cover

Underinsurance is common in Australia. Learn how to spot an underinsured home or contents policy, what averaging clauses do, and how to review your sum insured at renewal.

Underinsurance means the amount your policy will pay is less than it would cost to rebuild your home or replace your contents. It is one of the most common — and most expensive — mistakes Australian households make with home insurance.

Why underinsurance happens

  • Rebuild costs rise faster than premiums feel like they do. Labour and materials can jump between renewals.
  • Contents quietly accumulate. New phones, bikes, tools and furniture rarely get added to the sum insured.
  • Renovations are forgotten. A kitchen upgrade can add tens of thousands to rebuild cost.
  • People insure for market value. Sale price is not rebuild cost. Land value does not need rebuilding; the building does.

Building vs contents: two different numbers

Building (home) sum insured should reflect the cost to rebuild the structure to a similar standard, including demolition, debris removal, architects and temporary accommodation where relevant — not what a buyer would pay for the property.

Contents sum insured should reflect the cost to replace belongings at today's prices. High-value items (jewellery, art, collectibles) may need to be specified separately.

What an averaging clause can do

Some Australian home policies include an averaging or underinsurance provision. If you insure for less than the required percentage of full value, the insurer may pay only a proportion of a partial loss. Underinsurance is not only a problem for total losses.

Check your PDS for words like "average", "co-insurance" or "underinsurance". If present, getting the sum insured right matters even for mid-sized claims.

A practical underinsurance check

  1. Pull your current home and contents schedule and note both sums insured.
  2. Use a reputable rebuild cost estimator (many insurers and industry bodies provide one) for the building figure.
  3. Walk room by room for contents. Do not estimate from memory — open cupboards.
  4. Add recent renovations and big-ticket purchases from the last two years.
  5. Compare the totals to your schedule before the next renewal, not after a claim.

Renewal is the moment that matters

Insurers often index sums insured upward automatically, but indexation is not a personalised rebuild quote. Treat each renewal as a review: open the schedule, check the numbers, and adjust before the policy rolls over.

  • Did you renovate?
  • Did you buy expensive portable items?
  • Has your suburb seen sharp building-cost inflation?
  • Are temporary accommodation limits still realistic?

Keep the paperwork where you can find it

Underinsurance reviews fail when last year's schedule is lost in email. Keep building and contents documents together with renewal dates so the annual check actually happens.

Insuro files home and contents policies in one vault and reminds you before renewal — the natural moment to revisit sum insured. Forward insurer emails to your@insuro.com.auaddress. Free during beta.

Frequently asked questions

What is underinsurance?⌄

Underinsurance means your sum insured is lower than the cost to rebuild your home or replace your contents. After a major claim, the payout may not be enough to restore what you had.

How common is underinsurance in Australia?⌄

Industry research and insurer guidance have repeatedly found that a large share of Australian homes are underinsured for rebuilding costs, especially after construction-price spikes.

What is an averaging clause?⌄

Some policies reduce a claim payout proportionally if you are underinsured. For example, if you insured for 70% of the true rebuild cost, a partial claim may be paid at roughly 70%.

How often should I review my sum insured?⌄

At every renewal, and after renovations, major purchases, or big moves in building costs. Do not assume last year's figure is still enough.

Stop losing track of your policies.

Free during beta. Forward policy emails to your private @insuro.com.au address and we take it from there.

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