Law Firm Attrition Rate 2026: 13.2% of Lawyers Leave Each Year

A law firm attrition rate answers one plain question: of the lawyers at a firm, what share leave it in a year? Sartori & Partners data show that the median firm loses 13.2% of its lawyers a year, about one in eight, across 525 firms measured. The largest firms lose the most. And most of the lawyers who leave do not go in-house: they join another law firm. This guide sets out what the rate means, how it changes with firm size and where the leavers go, so a firm can read its own number against its peers.

We use one definition only. The leaving rate is the share of a firm's lawyers who leave it in a year, counting every destination and every level, from junior associate to senior partner. A lawyer who joins a rival, moves to a company, enters government or leaves practice counts the same way. The rate says nothing about hiring: a firm can lose many lawyers in a year and still grow.

Across the 525 firms measured, the median rate is 13.2%. A firm at the lower quartile loses 10.2% of its lawyers a year; a firm at the upper quartile loses 16.6%. The middle half of firms therefore sits inside a band of 6.4 points. That band is narrow. A rate in the low teens is the norm, not a warning sign.

How the figure is built shapes how it should be read. Departures are tracked on firm websites, checked monthly since April 2026, and the months observed are scaled to a full year. It is an annual rate measured over recent months. It is not a multi-year trend, and it cannot say whether attrition across the profession is going up or down.

For a managing partner, the useful reading is a planning number. A firm that runs at the median replaces about 13.2% of its lawyers every year just to hold its size, before it adds a single seat for growth.

Splitting the same firms by size shows where departures run highest. In the Sartori & Partners figures, firms of 1,000+ lawyers have a median leaving rate of 14.8%, which is 1.6 points above the median for all firms. Firms of 400-999 lawyers sit close to the market at 13.2%. The lowest median belongs to firms of 150-399 lawyers, at 11.9%, while firms under 150 lawyers come in a little higher, at 12.7%.

The spread inside the top class is the striking part. Even a firm of 1,000+ lawyers at its own lower quartile loses 13.1% a year, level with the median firm across the whole market at 13.2%. At the upper quartile, a firm of that size loses 18.7%. At the median, the gap between the largest class and firms of 150-399 lawyers is 2.9 points.

Large firms train a great many junior lawyers, and the rest of the market recruits from that bench, so a higher rate at the top is built into the model. The lesson is to benchmark against your own class. A firm of 1,000+ lawyers running at 14.8% is ordinary for its size; a firm of 150-399 lawyers at the same rate sits above its class median of 11.9% and should ask why.

Destinations are measured over a shorter window: the 6 months from May to October 2026, the period since moves out of private practice have been tracked in full. Over those months, Sartori & Partners data show that 86.1% of the lawyers who left a firm joined another law firm. Moves in-house took 11.3%. Other exits from practice took 2.0%, government 0.4% and academia 0.2%.

In counts, 7,281 lawyers moved to another firm against 953 who moved to a company: 7.6 firm moves for each move in-house. Partnership meetings often treat clients and corporate legal departments as the main pull on a firm's lawyers. They are a real pull, but a small one beside rival firms.

So the competitor that matters for retention is the firm across the street. Pay, the path to partnership and the strength of the practice platform are judged against what other firms offer, and that is where an exit conversation should start.

Seen from the company side, 13.1 lawyers moved in-house for each hundred lateral moves between firms over the same six months. Firms of 1,000+ lawyers were the source of 59.3% of those in-house moves. Over 12 months, the same class was the firm left in 57.3% of lateral moves where both firm sizes are known. Companies lean harder on the largest firms than rival firms do.

The level mix points the same way. In the Sartori & Partners lateral database, associates made up 76.7% of in-house moves, against 58.5% of lateral moves between firms over 12 months. Partners made up 11.0% of in-house moves, against 27.7% of lateral moves.

For a large firm, this is the one part of attrition that tilts toward companies: associates who leave for an in-house role. Matching pay rarely reverses it, because the lawyer is choosing a different kind of job. It is better planned for in associate class sizes and in alumni relations, since many of those lawyers later buy legal work.

Set the baseline first. A leaving rate near 13.2% is normal, and the middle of the market runs from 10.2% to 16.6%. Measure your own firm the same way, all levels and all destinations over a year, and compare it with the quartiles for your size class rather than with the market as a whole.

Then budget replacement before growth. A firm of 1,000+ lawyers at its class median of 14.8% must hire close to that share of its headcount each year to stay level, and any growth target sits on top. A lateral plan that counts only new seats understates the recruiting load.

Finally, aim retention at rival firms. With 86.1% of leavers going to another firm over the months measured, the offer that has to be beaten is a competing firm's offer, not a company's. If your rate sits above the upper quartile for your class, break it down by practice, office and class year before drawing conclusions.