For lawyers & small firms

How to Track Billable Hours as a Lawyer (Without Losing Money)

By Yufan Chen · 8 min read

For a lawyer, time is the product. Yet the minutes between tasks — a quick client call, a five-minute email, a contract you skimmed on the train — are exactly the ones that never make it onto a timesheet. And unrecorded time is unbilled time: money you earned but will never see.

This guide walks through how to track billable hours accurately, the everyday habits that quietly leak revenue from a law practice, and how to turn the time you capture into invoices that actually get paid.

Why billable hours slip away

The revenue most lawyers lose doesn't come from big, obvious gaps. It comes from small ones that never get logged:

• Forgotten timers. You start working before you start tracking, then back-fill a guess later.
• End-of-day reconstruction. Rebuilding your day from memory at 6pm reliably undercounts — the short tasks are the first to vanish.
• Context switching. A day with a dozen interruptions is a day with a dozen un-logged tasks.
• Non-billable creep. Admin and "quick favors" eat hours that never get attributed to anything.

The real cost of untracked time

The math is uncomfortable. If you bill $300 an hour and lose just 15 minutes of billable time a day, that's $75 a day — roughly $18,000 a year across 240 working days. Lose half an hour a day and you've left $36,000 on the table. For most solo lawyers and small firms, capturing that time is the single highest-return change you can make this year.

Four ways lawyers track billable hours

1. Contemporaneous timing (recommended). Start a timer the moment you begin a task and stop it when you finish. It's the most accurate method because nothing depends on memory. The only catch is friction — if starting a timer takes more than a tap, you won't do it.
2. Time blocking. Assign work to fixed blocks on your calendar and bill from the blocks. Better than nothing, but it rounds away the reality of a fragmented day.
3. End-of-day reconstruction. Reconstruct your hours each evening. Workable for some, but consistently undercounts and gets harder the longer you wait.
4. Spreadsheets. Flexible and free, but manual, error-prone, and painful to turn into a real invoice.

For nearly every lawyer, contemporaneous timing with a fast, one-tap timer captures the most time with the least effort — provided the tool stays out of your way.

What to put in every time entry

An entry you can confidently bill — and defend if a client questions it — includes:

• Client and matter so it bills at the right rate and lands on the right invoice.
• The task in plain language ("Drafted response to motion to dismiss"), not just "work."
• Duration, captured live or in clean increments.
• Billable vs. non-billable status, so write-offs are a choice, not an accident.
• A short note while it's fresh — the narrative is what survives into the invoice.

Turning tracked time into invoices

Tracking is only half the job; getting paid is the other half. The friction usually lives in the handoff — exporting a spreadsheet, reformatting it, and rebuilding an invoice by hand. The faster path is software that already holds your time, your clients, and your rates, and turns them into a branded PDF invoice in seconds. If your timer, your client list, and your invoice all live in the same place, "getting paid" stops being an evening's work.

How Tally makes this effortless

Tally is a calm, simple time tracker built for exactly this. You start and stop a billable timer in a single tap; if you forgot, you can add the time later on any day. Every entry ties to a client and matter with its own rate, you can merge the fragments of a single task into one clean line, and when it's time to bill, Tally turns your hours into a polished PDF invoice you can send without leaving the app. It syncs across iPhone, Mac, and the web, so the timer is always one tap away.

Related: Time tracking & invoicing for freelancers