Hello.
Here the situation which has been put is :
1) The employee has been promoted. (2) He/she resigns on the very next day. (3) Issue - Whether he is entitled for arrears or not.
The fact remains that the employee has been promoted and he/she is entitled for all promotional benefits on and from the date of promotion / assumption of charge of higher post (in some promotion orders, it is mentioned that the promotion will be effective from the date of charge assumption). Accordingly, if the employee has assumed the charge or the promotion has been effect from the date of issue, the employee is entitled to all benefits, otherwise not. If he/she is entitled to benefits, he/she is entitled to arrears whether it is for one day or more, doesn't matter.
The question raised by one follower that in case of delay in promotion after being due, arrear will not be payable. Very True. Only being eligible for promotion does not make an employee to be entitled for promotional benefits from retrospective effect. In most of the promotions, promotion might be effective from a retrospective effect but the monetary benefits accrue from the current date. So if an employee is on roll of Company and his name appears in promotion order and he actually assumes the charge of higher post (no matter for one day or more), then only he/she is entitled to benefits associated with promotion, else not.
AK Jain
HR Professional.