Automating invoicing describes two capabilities pointing in opposite directions, and the ambiguity costs organisations weeks of vendor conversations. Sending invoices automatically is billing, measured in cash collected. Receiving and verifying them is payables, measured in not paying twice or for things that never arrived. Almost nothing carries over between the two.
Automating the sending
Invoices generated from contracts, subscriptions, deliveries or timesheets and issued without typing, with chasing when unpaid. Concerns are billing accuracy, recurring schedules and tax treatment. It lives in billing or accounting software, and none of its capabilities help verify a supplier's claim before paying it.
Automating the receiving
Invoices captured, validated, matched against orders and receipts, routed for approval with cover and escalation, coded and paid on terms with a second-person release. Concerns are elapsed time, exception handling and payment fraud. It lives in payables software and knows nothing about billing schedules.
The cheap filter
State your direction and your monthly document volume in the first two sentences of any vendor contact. It costs nothing, it saves both sides a fortnight, and a vendor who continues regardless has told you something useful about how well their product fits the direction you named.
Questions people ask about automating invoicing
Which direction should we start with?
Whichever carries more document volume, because effort and saving are both per document.
Can one product serve both?
Accounting suites do to a degree, usually strongly on one side. Ask what it was originally built for.
Where does e-invoicing fit?
It serves both and, on the receiving side, removes the reading step altogether.
How long does either direction take to implement?
Billing automation usually follows the shape of your contracts and can be quick where they are uniform and slow where every customer is a special case. Payables automation is quicker to land in the workflow layer and slower where it depends on purchase orders and goods receipts existing, because that part is a habit change across other departments rather than a configuration exercise.