Purchase of reoccurring service

It is getting more and more common to buy services as a subscription model rather than just buying a product up front. The whole SaaS model is based upon this.

My question: How do you in this community deal with these purchases?

My experience is that companies purchases subscriptions without a purchase order and deal with manual postings on invoice.

If we would use the normal flow in IFS, and create a Purchase Order for this purchase. I would have to make a receipt of the PO to get invoices to match. That would be as much, or even more, work than just to deal with the invoice. Also, I don’t want to receive a larger amount than I am supposed to pay each month which would force me to do a receipt each month.

Ideally there should be a functionality where I can create a PO and accept invoices/payments with re-occuring settings (for instance each month for a 2y period). It should be enough to approve one time that the purchase/payments will be done in accordance with Supplier Agreement.