Go to the calculator
Voluntary agreement calculatorOur calculator takes 1 to 2 minutes to use.
What you can do with this calculator
The voluntary agreement calculator is for workers, such as subcontractors, who are subject to a voluntary agreement. The rate of withholding is either the payee's Commissioner's instalment rate or a flat rate of 20%.
The calculator results are based on the information you provide.
What else you can do
To find out more about how much to withhold, how to make a voluntary agreement and how long an agreement lasts, see Payments under a voluntary agreement.