imprest
noun [ C or U ]
mainly UK uk/ˈɪmprest/ us ACCOUNTING
an amount of money that is used by a company, an organization, etc. to pay for regular small costs:
an imprest account/fund A petty cash box with an imprest account should be operated.
Compare
float noun
petty cash
FINANCE
a loan or an amount of money that is given to someone before they do business or a service for the government