Ensure your sum insured reflects the right amount for your needs — not too much, and not too little. Overestimating means paying higher premiums, while underestimating could leave you at risk of underinsurance, which means you may not be able to meet the costs of rebuilding your home in the case of a total loss claim. If you adjust your sum insured your premium will change as well. If you need a little help with finding out how much your sum insured should be, for either a complete home rebuild or full contents replacement, you can use Suncorp's home building calculator or contents calculator.