B2B service companies live on accounts receivable. Unlike retail businesses that collect payment at the point of sale, you’re extending credit every time you send an invoice with net-30 or net-60 terms. That means tracking what’s owed and when it’s due is essential to keeping cash flowing.

The core tracking tool is the AR aging report in your accounting software. QuickBooks and similar platforms generate this automatically. The report shows every unpaid invoice organized by how long it’s been outstanding: current, 1-30 days past due, 31-60 days, 61-90 days, and over 90 days. Run this report weekly, not monthly. Waiting until month-end to discover an invoice is 45 days past due means you’ve already lost weeks of collection opportunity.

Good tracking starts before the invoice goes out. Set clear payment terms in writing, include the due date on the invoice itself, and make sure your invoice clearly states what work was performed. Vague invoices invite questions and delays. The easier it is for your client’s AP department to understand and approve the invoice, the faster you get paid.

Build a follow-up routine that doesn’t rely on memory. Send a reminder a few days before the due date, another when it becomes overdue, and escalate contact for anything past 30 days. This can be automated in most accounting systems or handled manually if your volume is low. The point is having a system rather than occasionally noticing old invoices and making calls.

Watch for patterns in your aging report. If the same client consistently pays at 45 days despite net-30 terms, that’s useful information. Maybe you negotiate different terms, require a deposit upfront, or simply plan your cash flow around their actual behavior rather than stated terms. If certain project types consistently result in slow payment, that tells you something about your invoicing timing or how those projects end.

Track who owes you money at the client level, not just the invoice level. A client with three invoices totaling $12,000 in the 60-day column is a different problem than twelve clients each owing $1,000. The first requires direct attention. The second might indicate a process problem with your follow-up system.

Offer multiple payment options to reduce friction. Credit cards, ACH transfers, and online payment links all make it easier for clients to pay quickly. The small processing fee is worth it compared to chasing checks for weeks.

If invoicing and collections falls through the cracks because you’re busy with client work, that’s a sign you need help. Many local bookkeepers handle AR tracking as part of monthly bookkeeping, sending reminders and flagging overdue accounts before they become problems. The investment pays for itself in faster collections and fewer writeoffs.