Why law firm invoices go unpaid, and how to chase them on a Mac in 2026

What unpaid invoices cost a law firm

The clearest recent benchmark comes from Clio's 2025 figures, as restated by Purpose in Action. The average law firm collection rate is 93%. The median collection lockup is 32 days, which is the time from invoice to payment. The median total lockup is 93 days, from work performed to cash. Put those together and the industry banks roughly 82 cents of each dollar of work it does, according to that summary.

A few points sound small. They are not. Purpose in Action gives a worked example. A firm invoices £250,000 a quarter and collects £212,500. That is an 85% collection rate, eight points below the 93% average. The gap is worth about £80,000 a year. Run the same sum with your own billed total and your own collection rate. If you do not track a collection rate yet, that is your first job.

Benchmarks disagree, so read them with care

Older and newer numbers do not line up. Clio's 2018 report, cited by the ABA Journal, shows an average collection rate of about 85%. The 2024 report for mid-sized firms, summarized by LawFuel, shows 84%. The 2025 figure is 93%. These come from different years and different firm sizes. Do not read them as one trend. The 2025 numbers also reach you second-hand, because Clio's own report could not be opened during research.

Vendor surveys give a rougher picture. CollBox surveyed 50 law firms about cash flow and published the results in June 2025. It found average outstanding invoices of about $206,000 per firm. Forty-one percent had invoices 90 or more days past due. Another 26% had invoices that were 60 to 90 days old. CollBox does not explain how it picked firms, so treat these as signals, not measurements.

Why invoices sit unpaid: the main causes

Purpose in Action names four causes of weak collection. Each one is a process gap, not a character flaw. Read the list and check which ones match your firm. You may find more than one at work.

• No owner for collections. When everyone is responsible, nobody is.
• Partner discomfort. Many partners would rather not ask for money, so the follow-up waits.
• No cadence or escalation at 30, 60 or 90 days. The first reminder becomes the only reminder.
• Billing delay and vague bills. Clients pay for work they have largely forgotten.

The billing side matters too. The ABA Journal says vague invoices and nonspecific billing for chunks of hours invite client questions. Those questions delay payment. Inaccurate timekeeping leads to inaccurate invoices, and those also delay payment. A client who has to ask what a line means has a reason to wait.

Reminders alone may not be enough. A UK government survey of small businesses, summarized by Innovation Growth Lab, found that 76% of businesses contact late-paying customers. The same summary says this does not appear to reduce late payments. It also found that 59% do not check a customer's payment record before they agree terms. These are UK small business figures, not law firm data. They still point at the same gap between chasing and checking.

Fixes you can use this week without buying anything

Start with ownership, because nothing else sticks without it. Choose one person who reviews every open invoice each week. Write that name on the matter opening sheet. Name a backup for holidays and busy months. You do not need new software for this. You need a name and a calendar slot.

Write a 30, 60, 90 day routine

The 30, 60 and 90 day marks are natural points for a step. Purpose in Action names the missing cadence as a cause. Write the steps down once, then follow them every month. Here is a simple version. At 30 days past due, send a short, polite email with the invoice attached. At 60 days, call the billing contact and confirm they received the bill. At 90 days, the responsible partner makes a direct call, then follows up in writing.

Clean up the invoice before it goes out

Check the bill before it leaves. Replace one line that says legal services with task descriptions that name the work and the date. Show the matter number, the billing period and the person who did the work. Fix timekeeping every week, not at month end. Late time entries produce late, unclear invoices.

• Sending the bill to the person who hired you, not the person who approves payment.
• Waiting for a balance to age before anyone looks at it.
• Sending a reminder with no invoice number or amount, so the client has to search for it.
• Running reminders with no partner step, so the balance never reaches someone who can act.

Ask who pays before the first bill goes out. Confirm the approval route, the invoice contact and the payment method in the engagement letter. Ask how the client approves invoices internally. This takes a few minutes at intake and saves weeks later.

Keep one tracker. A spreadsheet is enough. Use columns for client, matter, invoice number, amount, sent date, due date, last contact, next step and owner. Sort by due date every Monday. You can run Google Sheets in Chrome on a Mac, or use Apple's Numbers. If a formula or menu stumps you, Google Sheets help for Mac covers the basics.

Automated reminders in billing tools you may already own

If you take card payments through LawPay, reminders live in its settings. The help center path is Settings > Client Billing > Billing and Invoice Preferences > Edit Preferences. Turn on the Automated Reminder toggle for each invoice. Reminders send only when an invoice has a due date and an open balance, and only to the invoice contact. Emails go out at 4 a.m. and texts at 8 a.m., based on the invoice creator's time zone. The article does not say whether reminders stop once an invoice is paid, so test that on one invoice. LawPay has two help center versions with different menu labels, so check against your own account.

QuickBooks Desktop for Mac also has payment reminders. Intuit lists QuickBooks Desktop Mac Plus as supported for automated payment reminders on invoices and statements. Schedule them from Customers > Payment Reminders > Schedule Payment Reminders. You can review and approve them before they go out. You can also send them later from Review & Send Payment Reminders. Confirm your version supports this before you rely on it.

TimeNet Law is a native macOS app, not a browser tool. The vendor describes billing, time capture and IOLTA-compliant three-way trust reconciliation. It lists a one-time price of $479.99 per user, or an optional $39.99 per user per month subscription. The minimum macOS version was not listed on the page reviewed. Check the vendor's pricing page before you buy.

Where Lazur helps, and where it does not

Lazur is a voice assistant for the Mac. Hold ⌥⌘ to ask about anything on screen, and it answers out loud. It can point at things, so you find a reminder setting faster. It can also guide you one click at a time, waiting for each click. It does not click for you. It does not send invoices or emails for you.

Dictation is a separate feature. Hold fn and speak, and clean, formatted text appears at the cursor in any app. That helps when you need a firm-approved past-due note in Apple Mail or Outlook. Read every word before you send. Lazur drafts text, but you choose what goes out.

Here is a realistic moment. You open LawPay's billing preferences and cannot find the reminder toggle. Hold ⌥⌘ and ask where it is. Lazur draws a circle and a label around it. Then ask for the next step, and click it yourself. The routine stays in your hands, and so does the decision.

Everyday actions help with the routine. Lazur can add a dated item to Apple Reminders by voice, so the 60 day call has a date and a reminder. Calendar events work the same way. Research runs in Lazur's own Chrome tabs and returns a summary and a report. That suits public pages about late payment rules. It does not replace your firm's own billing records.

Privacy comes first. Lazur listens and looks at the screen only while you hold the shortcut. Audio and the screenshot go to AI providers to answer, and they are not stored. Content is never used to train AI models. Even so, your firm's rules decide what you put on screen. Plans and trial terms are on the pricing page.