Does a Tow Truck Need a USDOT Number and MC Authority?

Tow operators get this wrong in both directions. Some file for authority they do not need and pay for filings they could skip. Others run interstate transport work on a "we're a tow company, we're exempt" theory and find out at a roadside inspection, or at a claim, that they were not.

The USDOT number: a safety identifier, triggered by weight and interstate travel

FMCSA's registration page says you must have a USDOT number if a vehicle has a gross vehicle weight rating, gross combination weight rating, gross vehicle weight or gross combination weight of 10,001 pounds or more, and the vehicle is involved in interstate commerce. Interstate commerce means trade or transportation between a state and a place outside it, between two places in a state through another state, or between two places in a state as part of a movement that began or will end outside the state.

For towing, the weight test is almost always met. A wrecker or rollback with a car on the deck or on the hook is a combination, and the combination weight of the truck plus the towed vehicle is what counts. If you ever tow across a state line, or pull a vehicle that is being moved out of state, you are in interstate commerce on that trip and the USDOT requirement applies.

Even if you never leave the state, FMCSA lists the states that require a USDOT number for intrastate commercial motor vehicle registrants. As of the page's September 2025 update it includes California, Texas, Florida, New York, Georgia, Ohio, Pennsylvania, Michigan, Arizona, Colorado, North Carolina, Washington and about two dozen more. If your state is on the list, you need the number regardless of where you tow.

A USDOT number does not by itself require an insurance filing. It does put you in the federal safety system: driver qualification files, medical certificates for CMV drivers, vehicle inspection and maintenance records, hours of service where applicable, and roadside inspection data tied to your number. Underwriters pull that data at every quote.

MC authority: the emergency towing exemption

Operating authority (the MC number) is about for-hire transportation of property, and that is where the towing exemption lives. 49 U.S.C. 13506(b)(3) provides that, except where the Secretary finds it necessary to exercise jurisdiction, FMCSA has no jurisdiction under that part over "the emergency towing of an accidentally wrecked or disabled motor vehicle."

Read it narrowly, because that is how it is written. The exemption covers towing a vehicle that is wrecked or disabled, as an emergency. A police rotation call, a motor club dispatch for a breakdown, a crash scene recovery: exempt. The following are not emergency tows of a wrecked or disabled vehicle, and when they cross a state line for compensation they are ordinary for-hire property carriage:

• Repossessions
• Dealer-to-dealer or auction transport
• Moving a running vehicle for a customer's convenience (relocation, seasonal moves)
• Hauling vehicles for a body shop, fleet or rental company under contract
• Impound transfers that are not part of the original emergency tow

If any of that is part of your business and any of it crosses a state line, you need MC authority. Purely intrastate non-emergency transport answers to your state's rules instead; check with the state.

If you need authority, the insurance filing is $750,000

FMCSA will not grant operating authority until the required financial responsibility is on file. The insurance filing chart lists, for for-hire carriers of non-hazardous property in vehicles of 10,001 pounds GVWR or more, a $750,000 public liability minimum, filed by your insurer on a BMC-91 or BMC-91X (or a BMC-82 surety bond), with the MCS-90 endorsement attached to the auto liability policy. Under 10,001 pounds the figure is $300,000, which almost never applies to a tow truck.

Two details from the FMCSA page matter in practice. After you apply, the filing has to land within 20 days of your application's publication in the FMCSA Register or FMCSA serves notice that the application will be dismissed unless you comply within 60 days. And the business name and address on the filing must match your application exactly, or the authority is delayed.

Most tow operators already carry $1,000,000 combined single limit because police rotations and motor clubs require it, as covered in our rotation and motor club requirements guide. That limit satisfies the federal filing. What changes is that the carrier has to be willing to e-file the BMC-91X and attach the MCS-90, and not every tow program does. Tell your broker you need a filing before the quote, not after the bind.

What the MCS-90 does and does not do

The MCS-90 is a public-liability endorsement. It makes the insurer answer to the public for bodily injury, property damage and environmental restoration up to the filed limit even if a policy defense would otherwise apply, and then lets the insurer recover from you. It does not add on-hook, garagekeepers, or physical damage coverage, and it does not change the fact that a vehicle on your hook is in your care, custody and control. Those coverages are still separate, as explained in our piece on on-hook versus garagekeepers.

A simple way to sort your fleet

Go truck by truck and answer three questions:

1. Does this truck ever cross a state line, or move a vehicle that is coming from or going to another state? If yes, it needs a USDOT number. If no, check whether your state requires one anyway.
2. Does this truck do any paid transport that is not an emergency tow of a wrecked or disabled vehicle, across a state line? If yes, you need MC authority and a $750,000 filing with an MCS-90.
3. Does the policy on this truck match the answers? The named insured must match your FMCSA registration, the limit must meet or exceed the filing, and the carrier must actually file.

Then put the door-jamb GVWR label, the USDOT and MC numbers, and the current filing confirmation in one folder. Those are the first three things a roadside officer and an underwriter will ask for. State-level requirements vary a great deal on top of the federal rules, which is why we keep a state-by-state guide.

Frequently asked questions

Do tow trucks need a USDOT number?

If the truck (with the towed vehicle) is 10,001 pounds or more and operates in interstate commerce, yes. Many states also require a USDOT number for intrastate commercial vehicles, so check FMCSA's state list.

Is towing exempt from MC operating authority?

Emergency towing of an accidentally wrecked or disabled motor vehicle is exempt under 49 U.S.C. 13506(b)(3). Paid transport of vehicles that are not wrecked or disabled, across state lines, is not exempt and requires authority.

Does a repo tow truck need MC authority?

If repossessed vehicles are transported for compensation across state lines, yes. A repossession is not an emergency tow of a wrecked or disabled vehicle.

What is the FMCSA insurance minimum for a tow company with authority?

$750,000 public liability for vehicles of 10,001 pounds or more, filed on a BMC-91 or BMC-91X with the MCS-90 endorsement. Most tow operators already carry $1,000,000 for rotation and motor club work.

Does the MCS-90 cover the car on my hook?

No. It is a public-liability endorsement for third-party injury, property damage and environmental restoration. On-hook and garagekeepers coverage are separate.

What if I only tow within my state?

Federal USDOT and authority rules do not apply to purely intrastate operations, but your state may require a USDOT number and has its own towing and insurance rules. Check with the state.

Sources

• FMCSA, "Do I Need a USDOT Number?" (weight threshold, interstate commerce definition, state list): https://www.fmcsa.dot.gov/registration/do-i-need-usdot-number
• 49 U.S.C. 13506(b)(3), Miscellaneous motor carrier transportation exemptions (emergency towing): https://www.law.cornell.edu/uscode/text/49/13506
• FMCSA, Insurance Filing Requirements (property carrier minimums, BMC-91/91X, MCS-90, filing deadlines): https://www.fmcsa.dot.gov/registration/insurance-requirements
• 49 CFR 390.5, Definitions (commercial motor vehicle): https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-390/subpart-A/section-390.5