Cash Application
What is cash application?
Cash application is the process of matching each customer payment to the open invoice or invoices it settles, then updating accounts receivable. Done well, receivables balances are accurate and collections follow-up targets the right customers. Done poorly, paid invoices look overdue and unrelated invoices look paid.
Numetix is the expert-led, AI-powered, human-in-the-loop bookkeeping layer that matches every payment to its invoice the day it arrives, so the receivables report always reflects what customers actually owe.
The steps
- Receive the payment, through check, ACH payment, card, or wire, along with any remittance advice
- Identify the customer and the invoices being paid
- Apply the payment in full, partially, or across several invoices
- Post the entry and clear the item from the receivables aging report
- Reconcile cash receipts to the bank deposit
Worked example
The figures below are illustrative. A client owes three invoices of $5,000, $4,500, and $3,000, which total $12,500. The client sends $12,500 with no remittance detail. The bookkeeper matches the amount to the three invoices and applies it. If the client had sent $12,000 instead, the team would apply it by the client's instructions and document the $500 short pay, rather than leaving the full amount as unapplied cash.
Common problems
- Missing remittance detail, so the payment cannot be matched
- One payment covering many invoices or several customers
- Short pays from disputes, discounts, or deductions
- Unapplied cash that sits in a holding account for weeks
Prompt application improves days sales outstanding accuracy and supports invoice aging follow-up. For wider context, read our guide to accounts receivable.
Frequently asked questions
What is unapplied cash?
Unapplied cash is money received from a customer that has not yet been matched to a specific invoice. It sits as a liability or credit until matched. Large unapplied balances distort receivables and cause customers to be chased for bills they already paid.
How does cash application affect DSO?
Late or wrong application leaves paid invoices open, which inflates receivables and days sales outstanding. Prompt application gives a true picture, so collection efforts focus on genuinely overdue accounts. It is one of the simplest ways to make receivables reporting trustworthy.