WA Invoice payments, reasonable time to pay

[Pmacnz]

My wife and I have a cleaning business. We are having problems getting invoices paid from two real estate businesses that we contract to. We constantly have invoices outstanding that are 2 and 3 months old and more.
Their excuses are that they are waiting on money to be released from the customers bond account or that there is no money in the account.
My issue is that they should pay the accounts in a responsible time and that we are invoicing them the real estate company, not a third party.
What does the law say about this situation and what is a reasonable time to pay?

 

[Tim W]

The contractual relationship here is between you and the agents.
Where the money they owe you comes from is not your problem.
90 days is a reasonable amount of time to wait.

Consider taking them to court for unpaid debts.

 

[Pmacnz]

Pretty much what I thought,thanks for confirming that. The business relationship is pretty much broken now so will do, thanks.