Retainage Amount
To calculate the retainage amount, the program multiples the document amount (or the document total, if you include taxes in retainage) by the retainage percentage. You can enter a new retainage amount, if necessary. When you enter an amount to replace a calculated amount, the program recalculates the retainage percentage.
The retainage amount is subtracted from the document amount (or the document total) to calculate the amount due.