Reconciling the payables ledger to the creditors balance feels like hunting for errors and is mostly categorising timing. Sorting the differences into three known categories before investigating anything resolves most of them quickly, and it leaves a much shorter list of genuine unknowns than the raw difference suggested.
Category one: goods received, not invoiced
Deliveries recorded against orders where the supplier has not billed yet. A real obligation, normally accrued rather than sitting in payables, and therefore a difference in a predictable direction. Its size depends on how promptly your suppliers invoice and how promptly receipts are recorded, both of which you can observe.
Category two: invoiced, not posted
Invoices in the payables queue, unapproved or in exception, and therefore not yet in the ledger. This is the operational queue, valued. It is worth reading as a process signal as well as a reconciling item: a growing figure here means the queue is growing, and that is usually news to somebody.
Category three: in transit and misallocated
Payments made and not yet cleared, and credits applied to the wrong invoice. Both resolve within a period or two. What is left after these three categories is the genuine unknown, and investigating a short list properly is far more productive than investigating a long list superficially.
Questions people ask about how to reconcile accounts payable
How often should we reconcile?
Monthly. Less often and the differences accumulate to the point where categorising them is itself a project.
Who decides the accounting treatment?
Your accountant. Payables produces accurate detail and dates; how it is treated in the accounts is decided elsewhere.
What about persistent differences?
Investigate them as items rather than carrying them forward. Real errors hide among timing differences precisely by persisting quietly.