What 'Automatic Sum Insured' Really Means on Your Policy

Open most contents policies and you will find a figure already filled in for you. You did not choose it. The insurer worked it out, dropped it into the box, and called it your sum insured. Often it comes with a reassuring label: automatic, guaranteed, or some promise that you need not worry about getting the number right.

It is genuinely convenient. It is also, for a lot of households, the quietest path to being underinsured, because a number you never examined is a number you never checked.

Key takeaways

• An automatic sum insured is a default figure the insurer sets for you, usually from a calculator, not a number you verified.
• The convenience is real, but so is the risk: a default built for an average home can sit well below what a particular home owns.
• Reassuring words like "guaranteed" often describe how the figure is set, not a promise to replace whatever you actually have. Read the terms.
• Single-item limits still apply, so valuables can be underpaid even when the headline figure looks generous.

Where the default figure comes from

An automatic sum insured is the calculator output we describe in why your insurer never asks what you own, simply applied for you instead of suggested. The insurer takes your property type, bedroom count, and postcode, maps them to the average contents value of similar homes, and enters that.

For the insurer this is efficient and sensible. For you it has a subtle effect: it removes the moment where you might have stopped and asked whether the number was actually right. The box is already full, so you move on. The estimate is never tested against reality until you claim.

"Guaranteed" does not always mean what it sounds like

This is the part worth slowing down on. Some policies attach strong language to the automatic figure, suggesting you cannot be underinsured or that replacement is guaranteed. It sounds like a promise to make you whole whatever happens.

Read the actual terms, because the phrase often describes the method, not the outcome. It may mean the insurer guarantees to set a figure for you, or guarantees not to apply an average clause, rather than guaranteeing to replace everything in your home regardless of value. Many of these covers still pay only up to the stated amount, and still apply the usual limits. The reassurance can be real or it can be largely presentational, and the only way to tell is to read what it actually commits to.

The limits the headline figure hides

Even a healthy-looking sum insured carries internal caps. The most important is the single-item limit: the maximum a policy pays for any one unspecified item, often just a few thousand in your local currency.

That limit does not move because the overall figure is automatic. So a watch, a ring, a camera, or a piece of art worth well above the cap is underpaid unless you have specified it separately. Households with jewellery, watches, or art are the most exposed here, and these are exactly the items the averaging calculator could never see. The default figure can look comfortable while the things you would most miss are quietly capped.

How to check a number you did not choose

You do not have to reject the default. You do have to verify it, the same way you would check any figure someone else filled in on your behalf.

Work out what your belongings would actually cost to replace at today's prices, by taking a home inventory, and compare that total with the automatic figure on your policy. Note your highest-value items and check them against the single-item limits. Then take both to your insurer. If there is a gap, that is the conversation to have. This is information for it, not a recommendation. WHIG does not recommend a sum insured, and your insurer can confirm the right figure and the right way to specify valuables.

How WHIG gives you something to check it against

A default figure is only a risk while it is unexamined. WHIG gives you the number to examine it with. You record a short video walkthrough of your home, and WHIG turns it into a structured, dated, valued record of what you actually own, with replacement costs estimated from current retail pricing and a frame captured for each item. It also flags the specialist pieces worth specifying separately, so the single-item limits do not catch you out.

Then the automatic figure is no longer a number you simply trusted. It is a number you checked against your own home. The values are estimates, not professional valuations, but they give you a real basis for the comparison. See how WHIG works.