Cash application sits at the intersection of banking and accounts receivable: money has already moved, but the accounting system doesn't know which invoice it belongs to until someone, or something, makes that match. The three inputs are the bank or lockbox deposit, the open AR ledger, and remittance advice, whatever information the customer sent explaining what the payment covers, which can arrive as a PDF, an email, a spreadsheet, or nothing at all.

Frequently Asked Questions

What is unapplied cash, and why is it a problem?

Unapplied cash is a payment that's been received but not yet matched to an invoice. It sits on the books as a liability rather than reducing accounts receivable, which understates how much of a customer's balance has actually been paid and can mask genuine collections issues elsewhere in the portfolio.

How does cash application handle a short payment?

A short payment, where the customer pays less than the invoice amount, gets flagged for research into whether it reflects a pricing dispute, a deduction the customer took unilaterally, or a simple error. Automated systems can often identify the likely cause by comparing the shortfall against known deduction codes or recent disputes before routing it to a person.

What's the difference between cash application and AR automation?

Cash application is one specific step within AR automation, matching payments to invoices. AR automation is the broader category that also includes invoicing, collections outreach, and dispute management.

Can cash application be fully automated?

Most mature implementations reach high touchless match rates for clean, well-referenced payments, but ambiguous cases, like a single payment covering multiple invoices with a partial dispute, still benefit from human review. The goal is minimizing that exception volume, not eliminating human involvement entirely.

How does cash application affect DSO?

Every day a payment sits unmatched is a day it doesn't reduce accounts receivable in the system, even though the customer has technically paid. Faster cash application directly lowers DSO by closing that gap between payment receipt and recognition.

What information makes cash application easier?

Clear remittance advice referencing the exact invoice number is the single biggest factor. Companies that enforce this on outbound invoices, and that capture remittance data automatically from bank files, emails, and portals rather than requiring manual entry, see the highest touchless match rates.