Will my increment date change if I am acting up to a role? (BSA)

Where temporary movement into a higher pay band results in only one extra pay point, the incremental date remains the same.
 
Where temporary movement results in more than one extra pay step point the incremental date for the period of the temporary movement becomes the date the movement began. Once the temporary movement ends and the person goes back to their original post, the increment date would revert back to the original date.

If an employee receives a permanent promotion their increment date will change to the date of their new start date.
 
The Agenda for Change Terms and Conditions of Service Handbook on the NHS Employers website contains further information.