Payment allocation
The act of linking a cash receipt or payment to the specific invoice or invoices it settles, so that both the bank transaction and the outstanding balance are cleared correctly in the accounts. Unallocated payments leave invoices falsely open and distort aged debtors or creditors.
Payment allocation is the step that joins the money side of the books to the invoicing side. When £1,500 arrives in your bank account, Xero records it as a bank statement line. That line becomes meaningful only once it is allocated to the invoice it settles. Without that link, the bank clears but the invoice stays open as an unpaid debt, overstating what customers owe in your aged debtors report.
How Xero handles allocation
In Xero you allocate a payment during reconciliation by selecting the matching invoice from the suggestions, or directly from the invoice screen via “Make a payment”. The allocation posts the cash to your bank account in the ledger and marks the invoice as paid. If the payment only covers part of the invoice, the residual balance stays open as a partial payment. If it exceeds the invoice, the surplus sits as an overpayment until refunded or offset against a future invoice.
Allocation errors are a common source of month-end problems. A supplier payment coded to an expense account without clearing the bill leaves it outstanding in aged creditors; a receipt matched to the wrong invoice closes the wrong debt and leaves another open. Reviewing unallocated receipts and unmatched credit notes before closing the period catches these before they distort the VAT return or balance sheet.