Employers must transmit employee contributions to pension plans as soon as they can reasonably be segregated from the employer’s general assets, but not later than the 15th business day of the month immediately after the month in which the contributions either were withheld or received by the employer.
Employers should be aware that this is a deadline, and that funds should be deposited sooner if possible. For smaller plans (fewer than 100 participants), employers may claim a safe harbor if funds are deposited within seven business days of receipt or withholding.