When does the MLS transfer window close in 2026? Full details on opening and deadline dates for the primary and secondary windows
Major League Soccer is giving clubs two defined periods to bring in new players from outside the league and complete key squad work.
These dates matter because, under FIFA and MLS rules, teams generally need an open window to request an International Transfer Certificate for a player under contract abroad and to complete other forms of player registration.
In a World Cup year with heavy roster churn, the deadlines shape everything from marquee signings to late playoff additions, while MLS salary budget and roster compliance rules still determine whether a deal is actually workable.
When does the MLS Transfer Window close in 2026?
MLS will operate two windows in 2026, a Primary Transfer Window early in the season and a Secondary Transfer Window in mid-summer.
Primary Transfer Window
- Opens: Monday, January 26, 2026
- Closes: Thursday, March 26, 2026
Secondary Transfer Window
- Opens: Monday, July 13, 2026
- Closes: Wednesday, September 2, 2026.
Put simply, the primary deadline is March 26, 2026, and the secondary deadline is September 2, 2026. MLS has noted that extending the secondary window into September aligns the league more closely with the global market in the run-in to the MLS Cup Playoffs.
How the MLS Transfer Window works
MLS uses these windows as registration periods, which is a key distinction from how many fans think about “transfers“.
A deal can be agreed at any time, but a player arriving from another country typically needs the relevant paperwork and international clearance processed while the window is open.
MLS explains that, under FIFA regulations, clubs may request the International Transfer Certificate of a player under contract in another country only during one of the two annual registration periods fixed by the relevant association.
Transfer window difference: MLS vs Europe
The other major difference from many European leagues like the Premier League and LaLiga is that MLS roster building is not just about paying a fee and wages.
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Clubs must also stay inside MLS roster and budget rules, including salary budget charges, international roster slots, and mechanisms such as Designated Player slots and allocation money. That means a club can be inside the window and still be unable to complete a signing if it cannot make the numbers work under the MLS salary cap framework.
MLS also operates with additional league deadlines that interact with transfer planning. In 2026, clubs must be roster and budget compliant by Friday, February 20, and rosters lock at the Roster Freeze Date on Friday, October 9.
Those dates do not replace transfer windows, but they matter when clubs are sequencing moves, clearing space, or deciding whether to wait for summer.
Can MLS clubs sign players outside the transfer window?
In general, MLS clubs cannot register new players arriving from other leagues once a window has closed, because the registration period governs international clearances and the ability to add new incoming registrations from abroad.
The practical impact is that, if a club wants to add an external signing, it typically needs to complete the registration within the Primary Window or the Secondary Window.
There is, however, a meaningful exception, as MLS specifically notes that between the end of the Secondary Transfer Window and the Roster Freeze date, clubs can sign out-of-contract free agents.
In other words, a player who is not under contract can still be added after September 2, as long as the club remains roster and budget compliant and completes the move before rosters freeze on October 9.
After the roster freeze, changes are heavily restricted, but MLS rules allow limited relief in exceptional situations.
MLS states that rosters cannot be changed from the roster freeze date through the day after MLS Cup, subject to Extreme Hardship, which is the league’s mechanism for addressing severe availability issues.
This is not a normal pathway for squad building, but it is the provision that exists if a club faces an extraordinary shortage of eligible players late in the season.