An NHI Web site account allows you to purchase training and materials through the NHI Web site,
submit host requests online, access WBTs and WCTs and much more.
Our site has a daily maintenance window during which some pages may not be available. Please note that users attempting to access the NHI website during the hours below may experience a temporary outage:
Monday through Saturday 12 a.m. - 7 a.m. EST
Sunday 9 p.m. - 12 noon EST
We apologize for any inconvenience and will strive to keep these maintenance periods as brief as possible.
As of March 15, 2017, to access Pay.gov users must use:
For Pay.gov questions, concerns, technical issues or for more information, please contact Pay.gov Customer Service at:
800-624-1373 (Toll free, Option #2)
216-579-2112 (Option #2)
Hours are Monday - Friday, 7:00 AM - 7:00 PM ET.
To pay by check, mail a copy of your invoice and a check made payable to the Federal Highway Administration to:
DOT/Federal Highway Administration
C/O Mike Monroney Aeronautical Center
PO Box 25770
Oklahoma City, OK 73125
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