What Is Accounts Receivable? A Small Business Guide

Accounts receivable (AR) represents the money your clients owe you for products or services you've already delivered but haven't been paid for yet. If you've ever sent an invoice and waited for payment, you've dealt with accounts receivable — you just may not have called it that.

For small businesses, managing AR effectively is the difference between steady cash flow and constantly scrambling to cover expenses. This guide explains the AR process, how to read aging reports, and the best practices for getting paid faster.

Accounts Receivable: The Basics

When you complete work for a client and send an invoice with Net 30 terms, that invoice amount becomes an account receivable. It's an asset on your balance sheet — money you've earned but haven't collected yet.

How AR Fits Into Your Financial Picture

• Balance sheet: AR appears under current assets. It represents cash you expect to receive within the year.
• Income statement: The revenue is recorded when you earn it (deliver the service), not when you receive payment.
• Cash flow statement: AR affects your operating cash flow. Growing AR means you're earning revenue but not collecting it quickly enough.

The AR Process

1. Deliver the service or product to your client
2. Send an invoice with payment terms (e.g., Net 30)
3. Record the receivable in your accounting system
4. Follow up on outstanding invoices as due dates approach
5. Receive payment and record it against the invoice
6. Reconcile to ensure all payments match their invoices

Using invoice software automates steps 2-6, which dramatically reduces the manual work and errors in your AR process.

Understanding AR Aging Reports

An aging report is the single most important tool for managing accounts receivable. It categorizes outstanding invoices by how long they've been unpaid.

Sample Aging Report

Client	Current	1-30 Days	31-60 Days	61-90 Days	90+ Days	Total
Acme Corp	$5,000	$2,500	—	—	—	$7,500
Beta LLC	—	$3,000	$3,000	—	—	$6,000
Gamma Inc	—	—	—	$4,500	$2,000	$6,500
Totals	$5,000	$5,500	$3,000	$4,500	$2,000	$20,000

How to Read It

• Current: Invoices not yet due. No action needed.
• 1-30 days overdue: Send a polite reminder. Most are just forgotten.
• 31-60 days overdue: Firmer follow-up. Call instead of email.
• 61-90 days overdue: Escalate. This is becoming a collection issue.
• 90+ days overdue: Significant risk of non-payment. Consider collections.

The further right the money sits, the less likely you are to collect it. Industry data shows that invoices over 90 days old have only a 50-70% chance of being collected.

Key AR Metrics to Track

Days Sales Outstanding (DSO)

DSO = (Accounts Receivable ÷ Total Credit Sales) × Number of Days

DSO tells you the average number of days it takes to collect payment. If your terms are Net 30 and your DSO is 45, clients are paying 15 days late on average.

Benchmarks:

• DSO under 30: Excellent
• DSO 30-45: Average
• DSO over 45: Needs improvement

AR Turnover Ratio

AR Turnover = Net Credit Sales ÷ Average Accounts Receivable

This measures how many times you collect your average receivable balance during a period. Higher is better — it means you're collecting faster.

Collection Effectiveness Index (CEI)

CEI = (Beginning AR + Monthly Sales - Ending AR) ÷ (Beginning AR + Monthly Sales - Ending Current AR) × 100

CEI measures how effective you are at collecting receivables that are due. A score above 80% is solid.

Accounts Receivable Best Practices

1. Invoice Immediately

Every day between delivering the work and sending the invoice is a day of delayed payment. Send invoices the same day you deliver, or use milestone billing to invoice during the project.

2. Make Payment Terms Clear

Ambiguous terms lead to late payments. Specify:

• Exact due date (not just "Net 30")
• Accepted payment methods
• Late fee policy
• Where to send payment or link to pay online

3. Offer Multiple Payment Methods

The easier you make it to pay, the faster you get paid. Accept:

• Credit/debit cards
• ACH bank transfers
• Digital wallets (PayPal, Stripe)
• Checks (as a last resort — they're the slowest)

4. Send Payment Reminders Before the Due Date

Don't wait until an invoice is overdue. Send a reminder 3-5 days before the due date:

"Just a friendly heads-up that Invoice #1087 for $4,200 is due on March 15. Here's the payment link: [link]"

This simple step reduces late payments by 20-30% for most businesses.

5. Follow Up Consistently

Develop a standard follow-up sequence:

• Day 1 overdue: Friendly email reminder
• Day 7 overdue: Second email, mention late fee policy
• Day 14 overdue: Phone call
• Day 30 overdue: Formal letter, late fee applied
• Day 60 overdue: Final notice before escalation

6. Review Your Aging Report Weekly

Make it a Monday morning habit. Five minutes reviewing the aging report tells you exactly who needs a nudge and where potential cash flow problems are developing.

7. Require Deposits on Large Projects

For projects over $1,000-$2,000, require a 25-50% deposit before starting work. This reduces your AR balance and risk exposure from the start.

8. Vet New Clients

Before extending Net 30 terms to a new client, consider:

• Requiring payment on receipt for the first project
• Starting with smaller engagements
• Checking references from other vendors

Trust is earned. Payment terms are a form of credit — extend them carefully.

When to Write Off Bad Debt

Sometimes, despite your best efforts, a client won't pay. Signs it's time to consider writing off the debt:

• The invoice is over 120 days old with no response to follow-ups
• The client's business has closed
• The cost of pursuing collection exceeds the invoice amount
• Legal counsel advises against further pursuit

Write-offs are a tax deduction, so document the efforts you made to collect and consult with your accountant on proper treatment.

AR and Financial Reporting

Accounts receivable directly impacts your financial reports. When reviewing your financials, pay attention to:

• AR as a percentage of revenue. If this is growing, you're extending more credit than you're collecting.
• Bad debt expense trends. Increasing write-offs signal a need to tighten credit policies or improve collections.
• Cash flow from operations. Growing AR reduces operating cash flow even when revenue is strong.

Conclusion

Accounts receivable management isn't glamorous, but it's essential. Money your clients owe you is money you can't spend until it's in your account. Invoice promptly, follow up consistently, review your aging report weekly, and don't extend generous payment terms until clients have earned them.

Use invoicing software that automates reminders and generates aging reports so you can focus on the work instead of chasing payments. Your cash flow will thank you.