ready money 
(also ready cash)
noun [mass noun]
Money in the form of cash that is immediately available: you might find yourself without the ready money you need to snap up a bargain...
- Its main selling point is that ready cash is lent at the much cheaper rates than apply to mortgages.
- Another worry is that while retail investors often lack ready cash of their own, many lenders seem all too willing to bankroll them through both personal and margin loans.
- In cash terms, however, maize production was a net drain on ready money: cash payments exceeded the value of sales by $132.