What it means
Coverage is defined by four moving parts: what perils are insured, what property or liabilities are insured, how much the insurer will pay, and what is carved out by exclusions. Change any one of those and the protection changes, even if the premium stays the same.
Limits set the ceiling on payment, and they can apply per claim, per year in aggregate, or to a specific sub-category such as theft of cash or damage from a named storm. A $5,000,000 policy with a $100,000 sub-limit for flood offers very little flood protection despite the headline number.
Many property policies also include a coinsurance or average clause, which requires the business to insure its assets for at least a stated proportion of their full value. Insure for less and the insurer reduces every claim proportionately, even claims far smaller than the sum insured.
Coverage should be reviewed whenever the business changes shape. New premises, a new product line, a first overseas customer, a large equipment purchase or a shift to remote working can all move a company outside the assumptions its policy was written on.
The practical test of coverage is a simple question asked in advance: if this specific event happened tomorrow, which policy responds, how much would it pay, and what would we fund ourselves? A business that cannot answer that for its three biggest risks does not really know what it has bought.
In practice
Real-world examples.
Example
An architecture firm discovers its professional indemnity policy excludes work on residential towers above six storeys. It buys a specific extension before bidding for a nine-storey scheme rather than after winning it.
Example
A retailer with $900,000 of seasonal stock finds its policy sets a $400,000 limit on stock held at any one time. It arranges a temporary increase for the eight weeks before Christmas, at a cost of $2,800.
Example
A manufacturer expands into a second site and assumes its existing property cover follows automatically. Its broker adds the new address to the schedule, because unspecified premises would have been outside the coverage entirely.
Formula
Calculation
Where a coinsurance clause applies, the settlement formula is: Payout = (Sum insured / Required sum insured) x Loss, then less the deductible.
A food manufacturer owns a building with a full replacement value of $2,000,000. The policy carries an 80% coinsurance clause and a $25,000 deductible. To save premium, the owner insured the building for $1,200,000.
Required sum insured = 80% x $2,000,000 = $1,600,000.
Coinsurance ratio = $1,200,000 / $1,600,000 = 0.75.
A fire causes $400,000 of damage. Applying the ratio: 0.75 x $400,000 = $300,000.
Less the deductible: $300,000 - $25,000 = $275,000 paid.
The manufacturer therefore carries $125,000 of a $400,000 loss, calculated as $400,000 - $275,000, purely because the sum insured was set too low. The premium saving from under-insuring was around $3,000 a year, so this single event wiped out roughly forty years of savings.Case study
Seen in the real world.
Ravensworth Mills is a fictional textile business created for this illustrative example. It had grown from one leased unit to four over six years, and its insurance schedule had grown with it, largely by adding lines whenever the broker sent a renewal invitation.
A cyber incident locked the company out of its production planning system for nine days. Ravensworth had a cyber policy, so the finance director expected a straightforward claim, but the wording covered data restoration and notification costs only, with business interruption from a cyber event specifically excluded. The restoration bill of $48,000 was paid; the $260,000 of lost contribution was not.
The following year Ravensworth mapped its ten most damaging plausible events onto its policy schedule, one row per scenario, and found three more gaps of the same kind. This illustrative exercise cost two days of management time and reshaped roughly $40,000 of annual premium into cover that matched the actual exposures.
Watch out
Common mistakes.
- Reading only the headline policy limit and ignoring the sub-limits, which are where the real ceilings on cover for theft, flood or cyber usually sit.
- Leaving sums insured unchanged for years while asset values rise, which triggers a coinsurance reduction on every future claim.
- Assuming that because a policy is called cyber, property or liability cover, it responds to every loss that sounds like that category.
Questions
People also ask.
What is a coverage gap?
It is a loss the business is exposed to that no policy in its portfolio would pay for, and it is usually found only after the loss occurs.
Does higher coverage always mean a higher premium?
Broadly yes, but raising the deductible while raising the limit often costs little, because most of the premium pays for frequent small claims.
How often should coverage be reviewed?
At least annually at renewal, and immediately after any material change such as a new site, a new product line or a large contract.
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