Cash application
Matching each customer payment received to the invoices it pays, so receivables show what is still owed.
In short
- A payment is not really collected until it is applied to the right invoices.
- The hard part is payments without clear remittance: partial, combined or unexplained amounts.
- Unapplied cash makes customers look late when they are not, and triggers wrong reminders.
Cash application is the step in accounts receivable where incoming payments are matched to open invoices. When a customer pays $18,450, someone or some software has to decide which invoices that payment covers, mark them paid and deal with any difference.
Why it is harder than it sounds
A single payment often covers several invoices. Some customers pay slightly less than billed because they took a discount, deducted a disputed amount or paid net of fees. Others pay without saying what the payment is for. The remittance advice, when there is one, may arrive separately from the payment, by email or through a portal, in a format that does not match the bank data.
How it is done
- Exact match: the amount equals one invoice or a known combination of invoices.
- Remittance-based: the customer's remittance lists which invoices are paid.
- Rules: for example, apply to the oldest invoices first, or accept differences under a small tolerance.
- Exceptions: short payments and unidentified receipts go to a person to investigate.
Why it matters
Until a payment is applied, the customer still appears to owe the money. Aging reports overstate overdue balances, collectors chase customers who have already paid, and credit holds block orders from good customers. Fast, accurate cash application makes every other AR report trustworthy.
Worked example
One payment, three invoices
A customer sends $18,450 with a remittance listing invoices 1041 ($9,200), 1047 ($6,000) and 1052 ($3,500). Those total $18,700. The $250 difference is a deduction noted as "damaged pallet". The first two invoices are marked paid, 1052 is applied $3,250 with a $250 deduction opened for investigation, and the customer's balance is correct the same day.