In at least one embodiment of the present invention, a computer implemented method for Account Payable (AP) accounting for a multi-company group is provided. The method comprises recording a voucher with a multi-company accounting system including entering input voucher detail lines into the system. At least two of the input voucher detail lines are associated with two distinct companies of the multi-company group. The system automatically adds at least a pair of multi-company generated balancing lines associated with the voucher for balancing money owed by each of the distinct companies to define an outstanding balance associated with each of the distinct companies. A payment is recorded in the system to reduce the outstanding balances and system automatically adds a pair of multi-company generated “Due To/Due From” lines as “Due To/Due From” entries to balance the money owed between the distinct companies.