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The National IAM Benefit Trust Fund mails contribution billings on or about the 17th of each month. Payments are due on the first of the following month and are considered delinquent if not received by the 15th of the month.

The Remittance Page (page 1) of the billing should be returned with your payment, along with any employee changes. To report new enrollees or to modify employee information, please use the Employee Additions and Terminations Form (PDF). An enrollment form is also required for all new employees who are to be covered by the Plan. To report terminations, please use the Employer Notice to Plan Administrator of COBRA Qualifying Event Form (PDF).

Contribution payments can either be wire transferred (please contact the Fund Office for wire instructions) or mailed to our lockbox at the following address:

National IAM Benefit Trust Fund
P.O. Box 64607
Baltimore, MD  21264-4607

Questions?

You can contact the IAM Benefit Trust Fund Office or your benefits provider directly to get more information about each plan.

  • Phone: 800-457-3481 (participants) or 202-785-8148 (others). Our phones are open Monday through Friday, 8:30 AM to 4:00 PM Eastern Time.
  • Mail: National IAM Benefit Trust Fund, 99 M Street, SE,  Suite 600, Washington, DC 20003-4595
  • E-mail Form: Click Here

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