Mississippi’s apportioned system runs on choices made once: the expiration month you pick with your first application is your fleet’s month for as long as you register in the state — and two months are simply off the menu. The rest of the process lives in TAP, the same portal that handles the state’s taxes.
TAP: when it’s optional and when it’s not
Applications can go through TAP or on paper (601-923-7142 for the packet) — until your operation grows: fleets registering ten or more units, or reporting mileage in ten or more jurisdictions, are required to file on TAP. The portal handles originals, renewals (the "Create New Renewal" button appears the first calendar day of your expiration month), supplements, document uploads, and payments; the paper path adds 7–10 business days minimum.
Mississippi is a PRISM state: the USDOT number and TIN ride on every registration, the MCS-150 must be current within the past year, and county tax collectors handle only the light end — vehicles at 10,000 pounds or less — while the DOR’s district offices and the apportioned section carry the heavy traffic.
The 2290 rules — with a revocation clause
The manual mirrors the standard framework: proof of HVUT payment at 55,000 pounds or more combined or loaded gross weight; a receipted Schedule 1 listing the VINs, or the 2290 with both sides of the cleared check; and no proof required for units registered within 60 days of the bill-of-sale date. Mississippi adds the enforcement teeth most states leave implicit: it is the business’s responsibility to provide the DOR a copy of the 2290 within 60 days of purchase — or the IRP credentials may be canceled, and the manual repeats that the license may be revoked. The 2290 is federal: MDOR cannot file it for you.
Two deadlines with no slack: newly purchased vehicles must be registered within seven working days of the purchase date before penalties start — among the tightest windows in the country — and no fleet may choose December or January as its expiration month.
Frequently asked questions
Is TAP required for Mississippi IRP?⌄
What happens if I use Mississippi’s 60-day 2290 grace and forget to follow up?⌄
When can my Mississippi fleet expire?⌄
How fast must I register a new truck in Mississippi?⌄
Related guides
More in State Motor-Carrier Portals & IRP Offices
Official sources
- MDOR — IRP instruction manual (Form 77-761, verbatim rules)
- MDOR — interstate commercial vehicles
- Mississippi TAP (portal)
- IRS Trucking Tax Center (federal deadlines and the e-file watermark)
Agency rules, fees and contacts can change — confirm current requirements with the agency before acting. This guide is general information for truckers, not tax or legal advice.