The 29-year-old striker has thrashed out personal terms with the Rugby Park outfit and will put pen to paper after undergoing a medical.
The ex-Rangers forward, who is the Clydesdale Bank Premier League's record goalscorer, is a free agent following his release from Portland Timbers in the United States.
"Personal terms have been agreed and we don't expect the medical to throw up any problems," chairman Michael Johnston told BBC Scotland.
Boyd is not expected to be registered in time for Saturday's visit of Aberdeen.
- Sports & Recreation
- Clydesdale Bank Premier League