PO Prepayment Requests - partial/multiple payment functionality

It is definitely frustrating to not be able to enter the vendor invoice with multiple payments.  It seems that Acumatica designed everything with the perfect world in mind, and I cannot figure out how to handle this type of situation without having to void & re-enter prepayment invoices from vendors, split into our actual payment to the vendor.  In the real world, partial payments are sometimes needed.

Until the product changes, a couple of notes that may help in the meantime.

A prepayment request has to be paid in full, but you can create several prepayment requests on the same PO — one per milestone — and pay each as it comes due. That avoids the void-and-reenter loop if you split before paying.

Two ways to make that repeatable:

1. Two UDFs on the PO (number of prepayments and cadence). A business event on an action can generate the requests with the right amounts and due dates.
2. A small customization to allow credit terms / installments on the prepayment request itself.

Happy to compare notes if anyone has already automated the schedule.

Unfortunately, that doesn’t help if we enter the invoice with the intent to pay the entire thing, and then our customer doesn’t pay their portion, forcing us to renegotiate with the vendor to split the payment into two.  Sounds like I will have to ask our VAR to create a customization - but I am tired of paying a VAR for something that a system should just do already, especially since every upgrade could potentially break what we’ve paid the VAR to customize.  Acumatica provides that ability on normal invoices, so I’m not sure why that wouldn’t be the default on prepayment invoices.

@hsmith2 Eric's right, and it's the documented rule: a prepayment request is always paid in the full amount. Any split has to happen before the payment exists.

@mmelot your renegotiated case doesn't need a customization either. A prepayment request isn't a financial document. Releasing it posts nothing to the GL and doesn't change the vendor balance. So open the request on Bills and Adjustments, click Void on the More menu, and create two new requests from the PO for the agreed amounts. The voided request stops counting toward the PO's prepayment total, so the new ones can add up to the full order again. If a payment was already prepared but the check hasn't printed, the void is blocked until you remove the request's line from that payment's Documents to Apply tab.

If you'd rather leave the request out of it entirely, go straight to Checks and Payments. Enter a Prepayment type document for the amount you're actually sending and add the PO on the Orders tab (Load Orders finds it). Do that once per installment. When the AP bill for the PO is released, the reserved amounts apply to it. Two limits with that route: it skips approval, and it can't use a payment method that requires check printing.

Worth knowing if you upgrade. 2026 R1 adds a Prepmt. Invoice type in AP that can be paid partially, with the remainder staying in Pending Payment until you pay it or write it off. It sits behind the VAT Recognition on AP Prepayments feature, and once that's on, Create Prepayment Request on the PO becomes Create Prepayment Invoice.