When a plan 's accrual frequency is set to NONE, other fields in the Accrual tab will be disabled. If I enter the amount only in the Grant field, then the accrual batch job is going to wipe out any balance for the worker who enrolled in the plan. Though there is a workaround, request Microsoft to fix such that batch job will not run accruals/update carry forward for the plans which has accrual frequency as NONE. Currently accruals are being updated based on plan start date. Though this is hidden when frequency is set to NONE, somehow system is defaulting to it.