From Invoice to Collected: A Law Firm A/R Collection Playbook

You did the work. You sent the invoice. And then... nothing.

A week passes. Then two. Then thirty days. You check the aging report, see the same client sitting in the 60-day column, and wonder whether you should follow up or just wait a little longer. Most attorneys wait a little longer.

This is how firms quietly bleed cash without a single bad month showing up on the P&L.

According to Clio's 2024 Legal Trends Report, the average law firm waits 92 days to collect earned fees. That's three months of revenue you've already earned sitting somewhere between sent and paid. And the AffiniPay 2025 Legal Industry Report found that 68% of firms cite fee collection as a major operational challenge.

You're not alone in this. But "common" doesn't mean "acceptable." Here's how to build a collection process that actually works.

Start With Your A/R Aging Report

Before you can fix your collections process, you need to see the full picture. Your A/R aging report organizes outstanding invoices by how long they've been unpaid: current (0–30 days), 31–60 days, 61–90 days, and 90+ days.

Most practice management and accounting platforms can generate this report in seconds. The question is whether you're actually reading it.

Look at each bucket and ask:

• How much revenue is sitting in the 60+ day column?

• Are the same clients showing up every month?

• What's the total dollar amount at risk of becoming uncollectible?

That 90+ day column deserves special attention. The longer an invoice sits unpaid, the harder it gets to collect. Research consistently shows that collectibility drops sharply after the 90-day mark. If you have significant dollars sitting there and no active follow-up plan, you're likely leaving some of that money on the table for good.

Build a Follow-Up Timeline You'll Actually Use

The biggest collection mistake law firms make isn't being too aggressive. It's being inconsistent. A follow-up email that goes out whenever someone remembers to send it isn't a process. It's wishful thinking.

Here's a simple cadence to systematize follow-up:

Day 1: Invoice sent with a clear due date (typically net 14 or net 30, depending on your engagement letter terms).

Day 7 past due: A short, friendly reminder. "Just checking in to make sure this invoice reached you. Please let me know if you have any questions." Keep it warm. Most late payments at this stage are genuinely overlooked.

Day 21 past due: A firmer follow-up. Reference the invoice number, dollar amount, and original due date. Ask directly whether there's a payment issue or a question about the bill.

Day 45 past due: A phone call. Email is easy to ignore. A call communicates that you take this seriously, and it often surfaces information you wouldn't get otherwise (the client is disputing a charge, they had a financial setback, they never received the invoice in the first place).

Day 60+ past due: Escalation decision point. This is where you decide whether to offer a payment plan, pause work, or refer the account out.

The key is documenting this process and following it every time, for every client. Inconsistency sends the wrong signal. Clients figure out which firms will wait indefinitely and which ones won't.

When a Payment Plan Makes Sense

Some clients genuinely want to pay and just can't pay all at once. Offering a payment plan is often a faster path to full collection than waiting on a lump sum.

Before agreeing to one, make sure you:

• Get the plan in writing (even a quick email confirmation)

• Set up automatic payment methods where possible

• Know when you'll stop work if payments stop

A payment plan isn't a favor. It's a business decision. Used strategically, it keeps good clients who hit a rough patch while maintaining your cash flow.

Know When to Fire a Collection Client

This is the conversation no one enjoys, but it's a necessary one. Some clients are structurally bad-paying clients, and no amount of follow-up will change that.

The signals: chronic late payment across multiple invoices, disputing charges after the work is done without merit, or failing to respond to any outreach. At some point, the relationship costs more in staff time, collections energy, and cash flow disruption than the revenue is worth.

From a financial standpoint, your billable collection rate tells you exactly what percentage of billed time you're actually collecting. If a particular client is consistently dragging that number down, that's the data making the decision for you.

When to Bring In Outside Help

Even with a solid internal process, some accounts will age past the point where in-house follow-up is effective. At that stage, a specialized collections resource designed specifically for law firms can make a real difference.

CollBox is one option worth knowing about. It's an A/R management platform built for law firms that combines automated follow-up with North American-based accounts receivable specialists who handle outreach on your behalf. Unlike traditional collection agencies, it's designed to protect client relationships while still recovering what you're owed. Firms using the platform recover an average of $66,000 per month in outstanding receivables and get paid 40% faster than with traditional processes.

For firms dealing with a backlog of aged invoices or those that don't have the internal bandwidth to manage collections consistently, it's a practical alternative to doing it alone.

The Bigger Picture

An aging A/R report isn't just a billing problem. It's a cash flow problem, a lockup problem, and a firm health problem. Revenue that sits uncollected for 90 days is revenue that isn't available to cover payroll, overhead, or growth investments.

The firms that manage this well aren't necessarily billing more. They're just collecting more of what they bill, faster, with a process that runs whether anyone is thinking about it or not.

If you're not sure where your collections process stands or what your A/R metrics are actually telling you, that's exactly the kind of thing a virtual CFO can help you get a handle on. We'd be glad to take a look.