Why law firm A/R ages past 90 days (and how to stop it)

Very few invoices go straight from sent to 90 days past due. They get there one quiet week at a time: a reminder that never goes out, a client question sitting in an inbox, and an aging report nobody opens until the balance is three months old. This guide covers the most common causes, how to spot yours, and a weekly routine that stops it.

Seven reasons invoices drift past 90 days

1. Nobody owns the follow-up

Billing staff assume the attorney will mention it. The attorney assumes billing has it covered. Meanwhile the invoice sits. The fix: name one person responsible for every past-due invoice, with a written schedule for each email and call. Ownership is what makes follow-up happen in a busy week as well as a slow one.

2. Follow-up stops after the automated reminder

Automated reminders from billing software are useful, but a client who ignored the first one will often ignore the next three. The fix: add a person. A phone call around day 10 to 14 does something an email can’t. It asks the client what is in the way.

3. The attorney doesn’t want to bring it up

Attorneys often worry that asking about money will strain the relationship, especially with a long-time client. Waiting usually makes the conversation harder. The fix: keep routine billing follow-up separate from the legal work, with staff or an outside team handling it, so the attorney is only pulled in when the client has a real question.

4. A billing question goes unanswered

A client who thinks one entry looks wrong will often hold the whole invoice. If that question never reaches the billing attorney, the invoice simply ages. The fix: ask in every reminder whether anything on the bill looks unclear, and send any question to the billing attorney the same day. Our guide on what to do when a client disputes attorney fees walks through the response.

5. The bill was a surprise

A large first invoice, or one much higher than the client expected, is more likely to sit while the client works up to dealing with it. The fix: set expectations before the bill arrives. Our guide on getting clients to pay on time includes a short heads-up email for large bills.

6. The matter closed before the bill was paid

Once a case ends, the client has less reason to stay in touch, and final invoices are easy to forget on both sides. The fix: send the final invoice promptly, and treat its follow-up as part of closing the file.

7. Paying takes too many steps

If the only options are mailing a check or calling the office with a card, some clients will put it off. The fix: put one payment link on every invoice and every reminder, accept partial payments, and agree on payment plan terms in advance so staff can offer one on the spot.

How to tell which causes apply to your firm

Run your A/R aging report by client and list every account over 90 days. For each one, answer five questions:

1. When was the last logged contact with the client, and who made it?
2. Did the client ever raise a question about the bill?
3. Was the matter still open when the invoice went out?
4. Was this the client’s first invoice, or their largest?
5. Can the client pay online, in full or in part?

Patterns show up quickly. No logged contact in the last month points to ownership. Open questions point to routing. Final invoices on closed matters point to your file-closing steps.

A weekly routine that keeps invoices from reaching 90 days

The routine is short. What matters is that it happens every week, whoever is in the office.

1. Every Monday, run the aging report and list the invoices that went past due in the last week.
2. Send a short, friendly reminder on each one, with the invoice attached and the payment link.
3. Call every client whose invoice is now 10 to 14 days past due.
4. Send any open billing question to the billing attorney, with a date for a reply.
5. Log every email and call with the date and the outcome.
6. Flag any account approaching 60 days to the billing attorney for a decision.

For sample reminder emails and a call script, see how to collect unpaid legal fees. For step 6, a short internal note keeps the decision moving.

Subject: [Client name] balance at 60 days: decision needed by [date]

[Attorney name],

[Client name]’s balance of [amount] on invoice [number] is now 60 days past due.

Contact so far: [dates, and whether by email or phone]
Client response: [none / question about (entry) / promised payment by (date)]

Options:
1. Keep following up on the current schedule.
2. Offer a payment plan of [approved terms].
3. Review the bill with the client.

Could you let me know which you would like by [date]? I will keep the record updated either way.

[Name]

What to do with accounts already past 90 days

Give every account over 90 days a documented decision instead of letting it roll into next month. The billing attorney might keep a payment plan going, write off a small balance or send a final notice letter. Rules on referral vary by state, so read what ethics opinions say about collection agencies before going that route.

ARCounsel is a done-for-you accounts receivable follow-up service for law firms that connects read-only to QuickBooks Online, LeanLaw and Clio. Our AR specialists own the follow-up on past-due invoices for up to 120 days, in the firm’s name and on templates the firm approves. On day 120, we hold a next-step planning session with the firm for anything still open, using a dated record of every email, call and reply. We are not debt collectors, and clients pay the firm directly.

Frequently asked questions

Is law firm A/R over 90 days still collectible?

Often, yes, but it gets harder as a balance ages. An account with a logged history of contact and an open line to the client is in a far better position than one nobody has touched in months.

How do you reduce law firm A/R over 90 days?

Give one person ownership of follow-up, add a phone call to automated reminders, send billing questions to the billing attorney the same day, and review every account over 60 days with the billing attorney before it reaches 90.

Should the attorney call the client about an unpaid bill?

It depends on the firm and the client. Many firms keep routine billing follow-up with staff or an outside team, so the attorney can stay focused on the legal work, and bring the attorney in when the client has a question about the bill.

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