It is worth being precise about which parts of invoice management an automated system actually automates, because the word covers everything from a reminder email to a decision. The honest division is that mechanical, rule-driven steps automate reliably, and steps requiring a judgement about the transaction or a conversation with a person do not, and should not.
Automates reliably
Capturing the invoice into a record, checking it against duplicates and known suppliers, matching it against the order and receipt within tolerance, routing it to the approver named by rule, reminding and escalating, and pushing the approved result to the ledger. All rule-driven, all high volume, all repetitive. This is where the elapsed time is and where automation earns its money.
Assists but does not decide
Coding to an account, since the answer is a judgement about the transaction and not printed on the document. Suggesting is useful; deciding propagates last year's mistake. The same applies to flagging a possible duplicate with a different invoice number, where the software raises the question and a person answers it.
Stays human entirely
Resolving an exception with purchasing, agreeing a credit with a supplier, deciding whether a short delivery should be chased or accepted, and judging whether an unfamiliar supplier is legitimate. These involve context the system does not have, and automating them would mean guessing on questions where guessing is how money is lost.
Questions people ask about automated invoice management system
What share of invoices can be fully automatic?
Bounded by how many have an order and a receipt behind them, which is your own measurable number rather than a product capability.
Does it need to integrate with accounting?
To avoid rekeying at the end, yes. Without it you have automated the front half and left a manual step where the transaction is recorded.
What is the most oversold claim?
That it reduces exception handling. Exceptions come from documents disagreeing or missing, which automation surfaces faster but does not resolve.