The total amount of the payment, in the payment currency. It must reconcile against whichever list is set. The five document-linked lists (invoice_payments, bill_payments, credit_note_payments, debit_note_payments, payslip_payments) are summed by amount_to_pcy; advance blocks (credit_notes, debit_notes) without an explicit currency or rate are summed by amount. With an explicit advance currency or rate, the advance and payment must instead have equal base-currency values after fees. For money-out payments (bill_payments, credit_note_payments, payslip_payments, debit_notes) amount equals that sum plus payment_fees; for money-in payments (invoice_payments, debit_note_payments, credit_notes) it equals that sum minus payment_fees. Must be greater than zero.

Bank charges, or the residual left over when the lines do not add up to amount — typically the rounding and exchange-rate difference on a payment settling documents held in another currency. May be negative, and what that means depends on the direction: on a money-out payment a negative value means the lines convert to more than the cash actually paid, while on a money-in payment it means more was received than the lines convert to. Must not be zero; omit the field instead.