Partner Promotion Calendar 2026: January Carries Most of the Year

Ask when are law firm partner promotions announced and the answer is close to a single date. Sartori & Partners data show 1,666 lawyers announced as new partners in January 2026, out of 2,955 in the 12 months from June 2025 to May 2026: 56.4% of the total in one month. The rest of the year is a long tail with one clear second round in May. For a firm that hires partners, this calendar decides when its own bench changes shape and when the people it wants to hire learn where they stand.

The January round is a fixture, not a one-year spike. It counted 1,503 new partners in January 2024, 1,547 in January 2025 and 1,666 in January 2026. Measured against complete calendar years, January held 56.3% of all partner promotions in 2024 and 54.1% in 2025.

The latest 12 months tell the same story: January 2026 holds 56.4% of the promotions from June 2025 to May 2026, in line with the two full years. Promotion months are published up to May 2026, the last complete month.

Firms whose financial year follows the calendar make new partners effective from its first day, so the announcement lands in January. For a hiring firm, the January list is the moment a competitor's partnership is fixed for the year, and the weeks after it are when those promoted and those passed over weigh their next step.

Outside January, one month stands out each year. May brought 297 new partners in 2024, 332 in 2025 and 362 in 2026. That is the round for firms whose financial year starts in the spring, a common pattern among firms based in the United Kingdom. Even so, the January round of 2025 was 4.7 times the May round of the same year.

Two smaller clusters follow. April carried 207 promotions in 2025 and 163 in 2026, often firms announcing ahead of a May effective date. October is a third, quieter round: 174 in October 2024 and 172 in October 2025. July adds a mid-year group of similar size, with 135 in July 2025.

For a firm recruiting from a spring-year competitor, May plays the role January plays elsewhere: the weeks after it are when a passed-over senior associate or counsel is most open to a conversation. Knowing which calendar a target firm runs on is part of the search brief.

The quiet months are as regular as the busy ones. June recorded 37 partner promotions in 2024 and 37 in 2025; August recorded 20 and 21. December is almost as thin, with 58 in December 2025, the month before the large round.

In Sartori & Partners records, June and August 2025 together produced 58 new partners, against 1,547 in January of that year. A partner promotion announced in summer is the exception, an individual decision rather than a class.

Set the promotion calendar beside lateral hiring and the contrast is sharp. In the Sartori & Partners lateral database, January took 11.6% of the year's lateral moves in 2025, against 54.1% of partner promotions. January 2026 lateral moves were 1,560, 2.4 times December; partner promotions in January were 28.7 times December.

The lateral market never goes quiet the way promotions do. Lateral moves in August 2025 still reached 961, against 21 partner promotions, and September 2025 brought 1,473 moves. January 2026 lateral moves held flat (+2.0%) against January 2025, so the January lift in hiring is steady from year to year as well.

The mix flips inside January itself. In January 2026 firms promoted 3.4 lawyers to partner for every lateral partner they hired (496 lateral partners), and the ratio was 3.3 in January 2025. Over the 12 months to May 2026 the balance runs the other way: 0.79 promotions per lateral partner, with 3,749 lateral partners against 2,955 promoted. Firms grow their partnership by promotion in one month and by hiring in the other eleven.

Plan lateral partner searches around the promotion calendar, not against it. The January round fixes each competitor's partnership for the year: with 1,666 new partners named in January 2026, the market learns at once who made it and who did not. Candidates who missed the cut, and counsel who saw peers promoted, are most open between February and April. Firms also named 667 lawyers counsel in January 2026, and some of them will test the market rather than wait another cycle.

Approach a newly promoted partner with care. The new title, a first capital commitment and the first year of building a book all tie a lawyer to the firm that promoted them, so a move in the same year is a hard sell. The stronger window is the year before a likely promotion, or once the new partner has a track record of their own.

Watch the spring calendar for firms on a May year. The May round of 362 creates a second window in the early summer, at a time when the rest of the market is quieter and fewer firms compete for the same candidates. Last, read any summer month with caution: the low counts of June and August are a feature of the calendar, not a slowdown in partnership.