A policy effected without insurable interest is a wager, but policy proof of interest policies (PPI) are used in practice. The Life Assurance Act 1774 enacts that all policies shall be null and void if the insured has no interest (see insurable interest) in the event insured against or if made by way of wagering or gambling.

Wages may be insured under business interruption insurance as an unspecified working expense or left uninsured as a specified working expense. Wages are also a key variable in employers’ liability and other adjustable policies. See and compare PAYROLL COVER; DUAL BASIS PAYROLL.