Track time as it happens, not at the end of the day. Every study on billable hour recovery shows the same pattern. Professionals who reconstruct their timesheets at 5pm undercount their hours by 10-20%. The meeting that ran 47 minutes gets logged as 30. The quick client call gets forgotten entirely. Real-time tracking captures what actually happened.

Set up a structure that matches how you work and bill. Create client codes for each active engagement. If you bill different rates for different work types, add matter or task codes within each client. Planning, research, drafting, meetings, travel. The granularity should match your invoicing needs. Too detailed and nobody uses it consistently. Too vague and you cannot analyze where time goes.

Pick a tool that fits your firm. Solo practitioners can get by with Toggl or Clockify for basic tracking. Professional services firms with multiple professionals often need practice management software like Clio, PracticePanther, or similar platforms that tie time entries directly to invoicing. QuickBooks has time tracking features that work well if you want everything in one system.

The tool matters less than the discipline. Everyone in the firm needs to track time the same way. One person logging every six-minute increment while another rounds to quarter hours makes the data inconsistent and invoicing complicated. Decide on your policies and enforce them.

Review time entries before they become invoices. A weekly review catches the entry that was coded to the wrong client or the description that reads “work on project” instead of something specific enough to justify the charge. Clients who see detailed, accurate time descriptions pay faster and question bills less.

Connect your time data to your bookkeeping system. When tracked hours flow into invoices and invoices flow into your accounting software, you can analyze realization rates. How much of your tracked time actually gets billed? How much of billed time gets collected? These ratios tell you whether you are pricing correctly and which clients cost more to serve than they are worth.

The real value of good time tracking is not just invoicing. It is understanding your business. Firms that track consistently know their true cost per engagement, can forecast capacity, and make informed decisions about hiring and pricing. Firms that track sloppily are guessing.