The percentage by which you are underinsured matters.
Underinsurance clauses are based on the principle that if you pay only a portion of the premium that you should be paying to fully cover your home or contents – then you can only receive back an equivalent proportion of any claim.
Consider the following scenario:
	
		
			| Your true replacement costs | = | $1,000,000 | 
		
			| Your chosen sum insured | = | $500,000 | 
		
			| Percentage undervalued | = | 50% | 
	
Your home is partially damaged in a windstorm and you make a claim for $250,000 for repairs. You would be paid: 
	
		
			| $250,000 (full claim amount) - 50% (percentage underinsured) = $125,000 (minus your deductible) |