In the NWSL’s 12 years, 2025 marks the first time a secondary transfer window has been over 31 days long, and starting July 1st, it will be open for 55 days. The trend over the last few years has shown how much impact these mid-season(ish) additions can make leading to increased signings and player trades, year-over-year.
Looking Back
The inaugural season of the NWSL back in 2013, didn’t actually have official transfer/signing windows but instead there was simply a roster freeze day which signified when rosters had to be finalized.
As more teams joined the league, the number of games in the regular season generally increased and the season got longer—going from a 140 day season in 2013 to a 253 day season in 2025. Part of the season length does come down to the fact that in the past few years there has also been a shift to try to avoid scheduling regular season matches during FIFA windows.
Regardless of season length, until 2025 the secondary transfer window for the league averaged 29.7 days, with the low-side of 27 in 2023 and max’ing out with 31 in 2015 and 2021. In 2022, the NWSL actually decided to completely switch the windows, so the secondary transfer was only open for the month of March (31 days), and the 83-day primary window was actually in the summer.
Moving Forward
Part of the new collective-bargaining agreement (CBA) which was ratified mid-last season was the addition of language to potentially move the NWSL toward alignment with the traditionally european season which runs from August/September to June.
On average, between the primary and secondary window, the NWSL has an average of 113 days every season with transfer windows open. The window setup in 2025 has basically split the total windows days evenly between the primary and secondary windows for the first time, with 56 in the primary and 55 in the secondary.
As a reminder, when players are moving between leagues in different countries, they require the acceptance of an International Transfer Certificate (or ITC). Players can leave the NWSL at any time but in order to go to a league outside of the U.S., the league they wish to go to needs an open transfer window in order to officially accept the ITC. Until the ITC is accepted, said player cannot play.
Regardless of if the league does eventually make this move, shifting the transfer windows to align more with a large number of the major leagues will help the NWSL in terms of adding talent. Having a better alignment with other league windows when trying to get players loaned or transferred in and out of the NWSL should help the league in its drive for increasing global competitiveness.
Reference Data:
|
Regular Season Start |
Primary Window Start |
Primary Window End |
Length |
Secondary Window Start |
Secondary Window End |
Length |
Roster Freeze |
NWSL Championship |
Season Length |
|---|---|---|---|---|---|---|---|---|---|
|
3/14/2025 |
1/28/2025 |
3/25/2025 |
56 |
7/1/2025 |
8/25/2025 |
55 |
10/9/2025 |
11/22/2025 |
253 |
|
3/16/2024 |
1/29/2024 |
4/22/2024 |
84 |
8/1/2024 |
8/30/2024 |
29 |
10/10/2024 |
11/23/2024 |
252 |
|
3/25/2023 |
2/3/2023 |
4/27/2023 |
83 |
6/28/2023 |
7/25/2023 |
27 |
9/22/2023 |
11/11/2023 |
231 |
|
4/29/2022 |
3/1/2022 |
3/31/2022 |
30 |
6/1/2022 |
8/23/2022 |
83 |
8/26/2022 |
10/29/2022 |
183 |
|
5/15/2021 |
3/24/2021 |
6/15/2021 |
83 |
7/5/2021 |
8/5/2021 |
31 |
9/30/2021 |
11/20/2021 |
189 |
|
4/13/2019 |
3/1/2019 |
5/23/2019 |
83 |
6/25/2019 |
7/24/2019 |
29 |
9/10/2019 |
10/27/2019 |
197 |
|
3/24/2018 |
2/7/2018 |
5/1/2018 |
83 |
5/21/2018 |
6/20/2018 |
30 |
8/7/2018 |
9/22/2018 |
182 |
|
4/15/2017 |
3/9/2017 |
5/31/2017 |
83 |
6/5/2017 |
7/5/2017 |
30 |
8/29/2017 |
10/14/2017 |
182 |
|
4/16/2016 |
2/10/2016 |
5/11/2016 |
91 |
6/15/2016 |
7/14/2016 |
29 |
8/30/2016 |
10/9/2016 |
176 |
|
4/10/2015 |
2/18/2015 |
5/12/2015 |
83 |
6/5/2015 |
7/6/2015 |
31 |
9/1/2015 |
10/1/2015 |
174 |
|
4/12/2014 |
2/18/2014 |
5/12/2014 |
83 |
5/19/2014 |
6/18/2014 |
30 |
7/31/2014 |
8/30/2014 |
140 |
|
4/13/2013 |
1/31/2013 |
No Official Window |
No Official Window |
7/31/2013 |
8/31/2013 |
140 |

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