West Brom expect to sign Karlan Grant from Huddersfield Town on a six-year contract on Thursday following a medical.
The clubs have agreed a deal rising to £15m for the 23-year-old with the payment being spread over the term of Grant's contract.
Huddersfield had rejected a number of offers from Albion throughout the window but with the deadline looming on Friday, talks have intensified as they try to strike a compromise.
Grant has been the favoured choice of manager Slaven Bilic with Albion having also discussed Watford pair Troy Deeney and Andre Gray.