Inside Tax, the Speciality Sets the Clock to Partner

Ask how long the tax lawyer path to partner runs and the practice-level answer looks ordinary. Sartori & Partners data show that tax named 23.1% of its new partners within 8 years of their first year of practice, against 23.2% across all practices, and its median sits at 10.0 years, the same as the market's 10.0 years. That average hides a wide spread. International tax and transfer pricing lawyers were named within 8 years 37.2% of the time; tax-exempt and nonprofit specialists only 18.1%. For a firm that runs one partnership calendar for its whole tax group, the speciality of the associate matters more than the practice label on the door.

The figures below cover partners promoted over the last 5 years, measured from the first year of practice to the promotion. Each speciality figure rests on the promotions with a known start year, so the base is smaller than the promotion count: 43 cases for international tax, 202 for corporate and M&A tax. A speciality is the lawyer's own focus today and a practice is the group a promotion was recorded under, so the two are counted separately and are compared here by shares and direction only.

International tax and transfer pricing is the quickest route inside tax. Its median partner was named at 9.0 years, against 10.0 years for the practice, and the quickest quarter at 8.0 years or sooner. Of the 71 international tax partners promoted in 5 years, 43 carry a known start year, and 79.1% of them were named within 12 years.

Corporate and M&A tax follows at 28.7% within 8 years, 5.6 points above the practice figure, on the largest base of any tax speciality: 202 promotions with a known start year out of 274. Its median matches the practice at 10.0 years, but its slowest quarter is done by 12.0 years, a year before the practice's 13.0 years. Both specialities sit close to transactional work, which across the market is also where partners tend to be named soonest. The consequence for a tax head is plain: an international or deal tax associate who is still a year away from a review paced to the practice median has, by this record, often already crossed the point where peers in the same speciality were promoted.

At the other end, tax-exempt and nonprofit specialists made partner within 12 years 60.2% of the time, 12.2 points below the tax practice's 72.4% and further still from the market's 75.4%. Their median is 11.0 years, a year past the practice, and the slowest quarter waited 14.5 years or more. The figures rest on 83 promotions with a known start year.

Indirect tax and VAT shows the same late finish. Its median also reaches 11.0 years, only 64.1% were named within 12 years, and the slowest quarter of its partners waited 14.0 years or more, on a base of 39 promotions. Between the quickest and the slowest tax speciality, the point by which three in four partners were named moves from 11.5 years to 14.5 years, a gap of 3 years inside one practice.

These are the specialities where a strong associate is most exposed to a lateral approach in the late senior years. A firm with a nonprofit or indirect tax bench should expect partnership decisions after the twelfth year to be routine there, and should say so early, with the milestones that lead to them, rather than let a candidate read the slower clock as a verdict.

Between the two ends sit the specialities that look most like tax as a whole. Tax controversy lawyers were named within 8 years 25.4% of the time and within 12 years 73.2%, with a slowest quarter at 13.0 years, the same as the practice's 13.0 years. State and local tax lawyers reached partner at a median of 10.0 years, level with the practice, but their slowest quarter was done by 12.0 years and 77.2% were named within 12 years, on 57 promotions with a known start year.

The bases differ in size and should be read that way. In the Sartori & Partners record tax controversy carries 138 promotions with a known start year and state and local tax 57, so the controversy figures are the steadier of the two. The figures also pool every country in the record, and countries count the first year of practice differently, so they compare specialities with one another, not one city with another. For planning, a controversy or state tax associate can be put on the practice timetable without adjustment; the adjustments belong at the two ends.

Speed and volume are different questions. From June 2025 to May 2026 corporate and M&A tax lawyers received 51 partner promotions and tax controversy lawyers 35; the smaller specialities did not reach the threshold for a 12-month count. Across the same months the tax practice recorded 145 partner promotions and promoted 0.58 partners for each lateral partner it hired, against 0.79 across the market.

The lateral record shows where that buying lands. In the 12 months to October 2026, partners made up 60.9% of international tax lateral moves and 46.7% of corporate and M&A tax moves, against 37.9% across the tax practice. The specialities that promote earliest are also the ones where firms most often recruit at partner level, which suggests that a home-grown international tax partner is scarce and contested rather than surplus.

For a firm, early promotion and heavy partner hiring point the same way: the international and deal tax partner is the one other firms most often try to recruit. Keeping a recently promoted partner in these specialities is cheaper than replacing one.

First, split the tax calendar by speciality. Sartori & Partners figures put the international tax median at 9.0 years and the tax-exempt median at 11.0 years; one review date for both is early for one group and late for the other. Set the first partnership conversation in international and corporate tax ahead of the practice median, and in nonprofit and indirect tax plan for decisions that land after the twelfth year.

Second, hire to the clock. In international and corporate tax the record favors recruiting at senior associate and junior partner level, because the specialities name partners early and the lateral market already prices partners at 60.9% of international tax moves. In tax-exempt and indirect tax, where 60.2% and 64.1% were named within 12 years, a lateral senior associate brings a longer runway and should be told so plainly.

Third, read the practice average with care. Tax overall named 23.1% within 8 years; the six specialities in this report range from 18.1% to 37.2%. A compensation step or retention plan built on the average will be wrong at both ends of the group.