In today’s legal market, law firm mergers and lateral movement are increasingly common. One practical consequence that many attorneys overlook is the sudden loss of access to information they once assumed would always be available.

Every attorney should maintain a personal record of key professional data throughout their career. At a minimum, this includes billed hours, originations, working receipts, and a running list of the clients and matters on which you have worked. While most firms track this information internally, those systems are controlled by the firm, not the individual attorney.

The importance of maintaining these records becomes clear during two common scenarios.

First, if you ever explore a lateral move, prospective firms will almost certainly ask for detailed information about your practice. They will want to understand the nature of your work, the clients you have served, and the economics of your practice (your working receipts and your originations along with an accounting of your non-billable time). Having accurate personal records allows you to provide reliable information rather than relying on memory or incomplete estimates.

Second, and perhaps more importantly, conflict checks require precise client information. Before you can move to a new firm, the firm’s conflicts department must clear every client and matter you have worked on. If you do not have a comprehensive list of those clients, the process becomes slower, more stressful, and occasionally impossible to complete accurately.

Firm mergers create an additional complication. When two firms combine, internal systems often change quickly. Attorneys can lose access to legacy billing platforms, client databases, or historical reports that once made it easy to reconstruct their work history. By the time a lawyer considers a transition, that information may difficult to retrieve without raising eyebrows at the newly-combined firm.

Maintaining your own professional records is not about planning to leave your firm. It is about prudent career management. Just as lawyers advise clients to keep organized records, attorneys should take the same approach with their own professional data.

A simple, regularly updated record of your hours, originations, receipts and client relationships can save significant time and difficulty later in your career. In a profession where details matter, keeping track of your own practice is simply good risk management.