Increasing the Annual Contribution:
If a client qualifies, the contribution amount for the current tax year may be increased through December 31 or the end of your client's fiscal year.
Decreasing the Annual Contribution:
A client can generally decrease the contribution amount for the current tax year before 500 hours of service have been completed (generally around March 1). Once that point is crossed, the change to the contribution amount cannot be effective until the next tax year.