Accounts receivable (AR) is the money your customers owe you for goods or services you’ve already delivered but haven’t been paid for yet. On a balance sheet, AR sits under current assets — it’s value you’ve earned but not yet collected.

What it means in practice

When you send an invoice with Net 30 terms, that invoice creates an AR balance the moment it’s issued. The balance stays on your books until the client pays — typically as a bank deposit, ACH, wire, or payment-link click. Once payment lands, you “apply” the payment to the invoice, the AR balance drops to zero for that invoice, and your cash balance increases by the same amount.

In an accounting system like QuickBooks, every unpaid invoice contributes to your AR total. Reports that surface this:

A typical small-business AR snapshot looks like this — using a real export structure from QuickBooks:

Customer            | Invoice | Date       | Due        | Amount    | Open Balance
--------------------|---------|------------|------------|-----------|-------------
Acme Corp.          | 1042    | 2026-03-15 | 2026-04-14 | $2,400.00 | $2,400.00
Beta Industries     | 1044    | 2026-03-18 | 2026-04-17 | $1,890.50 | $1,890.50
Gamma LLC           | 1051    | 2026-03-22 | 2026-04-21 | $   612.25| $   612.25

The “Open Balance” column is your AR. The sum across all rows is your total AR balance.

Why it matters for invoice reconciliation

AR is only as accurate as your last reconciliation. The single most common bookkeeping error in small business is AR that doesn’t match reality — invoices marked unpaid that were actually paid by bank transfer weeks ago, or invoices marked paid that bounced. This shows up as:

The fix is reconciling AR against your bank statement on a regular cadence. checkunpaidinvoices.com automates that comparison: bank CSV + invoice CSV → four-bucket result (Paid / Likely paid / Unpaid / Anomalies) in 30 seconds.

AR vs. accounts payable

Accounts payable (AP) is the mirror image: money you owe to suppliers. AR is what’s coming in; AP is what’s going out. Together they’re the two main components of your working capital, and the gap between them — the cash conversion cycle — is a critical metric for cash-strapped businesses.

AR vs. cash

AR is not cash. It’s a promise of cash. Two key distinctions:

The allowance for doubtful accounts is the accounting adjustment that reflects this — you reduce AR by an estimated bad debt percentage to keep the balance sheet honest.

See your outstanding AR in 30 seconds — drop your invoice list + bank statement into the reconciliation tool. No signup.

Quick FAQ

Is AR the same as outstanding invoices? Functionally yes — your total AR is the sum of all open invoice balances. Technically AR can include other obligations (notes receivable, accrued interest) but for most small businesses, AR ≈ open invoices.

Why does my QuickBooks AR balance not match my invoicing tool? Because each system updates AR independently. If a payment lands in your bank and you mark the invoice “paid” in QuickBooks but not in your invoicing tool (or vice versa), the two systems drift apart. Reconciling against the bank statement — the source of truth — solves this.

How often should I review AR? Weekly if you have 50+ open invoices, monthly if you have fewer. The cost of waiting is statistical: invoices in the 0-30 day bucket recover at ~95%, invoices past 90 days recover below 30%. Speed is money.

What’s a healthy AR-to-revenue ratio? Industry-dependent. For most B2B service businesses with Net 30 terms, AR ≈ one month of revenue is normal. AR > 2-3× monthly revenue is a sign of either explosive growth or collection problems.