Semi Truck Insurance
Tractor-trailer insurance built around how you actually run — own authority or leased on, long-haul or regional. Coast has specialized in for-hire truck insurance since 1976.
- Same-day certificates, most within 2 hours
- Salaried, non-commissioned agents
- No broker fees
This page provides general information only and is not a quote, binder, or offer of coverage. Talk to a licensed agent about your specific situation.
What does semi truck insurance actually include?
“Semi truck insurance” isn’t one policy — it’s a program assembled from the coverages your operation, your authority, and your contracts require. For a tractor-trailer running for hire, that starts with the legally required auto liability and builds out from there: protection for your tractor, your trailer, the freight you haul, and the gaps between them.
What belongs in your program depends first on whose authority you run under. Own-authority carriers need the full stack with federal filings; leased-on owner-operators typically need the gap coverages their carrier’s policy doesn’t provide. Coast builds the program around the facts, not around a package name.
Own authority or leased on — two different programs
Running under your own MC number
You carry the full program: auto liability at or above federal minimums with the filings to prove it, plus physical damage, cargo, and the limits your shipper and broker contracts require — $1 million is the common ask.
Leased to a motor carrier
The carrier’s policy typically covers you under dispatch. Your buy-list is the gaps: bobtail or non-trucking liability, physical damage on your tractor, and non-owned trailer coverage if the lease makes you responsible for their trailers.
New authorities
Insurance is active before anything moves: liability with federal filings first, then the rest of the program. New authorities pay more in year one; rates typically improve after the first clean year.
Adding trucks and drivers
Fleet growth changes underwriting — driver files, equipment schedules, and safety controls start to matter as much as the trucks. Plan the insurance before the purchase, not after.
What determines your semi truck insurance cost
Two tractor-trailers can carry very different premiums — radius, freight, and authority history separate them more than the trucks themselves. These are the levers underwriters pull; quote your actual operation and an initial number typically comes back within 24 hours.
Longer radius and higher-value freight price higher; clean records and established authorities price lower. Complete proposals typically follow within 3–5 business days.
Start your semi truck quote
Tell us about your authority, your radius, and what’s behind the tractor.
How the way you run shapes the program
Radius changes everything. Long-haul operations cross more states, more traffic environments, and more uninsured-driver territory than regional or local work — and underwriters price that reach. Long-haul also makes trip planning around coverage practical questions: where the truck parks overnight matters to physical damage, and multi-state routes mean your UM/UIM protection meets very different state rules along the way. Regional and dedicated-lane operations, by contrast, often quote tighter because the exposure is more predictable.
What’s behind the tractor matters as much as the tractor. A dry van program is the baseline. Reefer operations add perishable cargo exposure — spoilage and temperature claims are cargo territory, and reefer-breakdown protection is a specific endorsement worth asking about rather than assuming. Flatbed work adds load-securement exposure that leans on general liability and cargo together. And if you run drop-and-hook or trailer pools, the trailer you pull is usually someone else’s: that’s trailer interchange or non-owned trailer coverage, depending on whether a written interchange agreement exists.
Team operations and driver files. Adding a co-driver or employee drivers puts their records into the rating alongside yours — a second seat is an underwriting event, not just a schedule change. Keep driver files, MVRs, and safety controls documented; at renewal they’re the difference between a story and proof.
What the law requires for tractor-trailers
Interstate for-hire semis fall under the federal minimums of 49 CFR § 387.9: $750,000 in liability for general freight, more for oil and hazmat — though most operators carry $1,000,000 because brokers and shippers require it. Proof is filed with the FMCSA, and the MCS-90 endorsement rides on the policy. Intrastate rules and state filings vary; Coast is licensed in 35 states and sorts out exactly which filings apply to your operation.
The coverages that make up a semi truck program
Related truck insurance
Verify current requirements at the source
Insurance, registration, and filing rules change. These official and authoritative sources carry the current requirements and research cited on this page.
Semi truck insurance FAQs
How much insurance does a semi truck need by law?
Interstate for-hire operations need at least $750,000 in auto liability under 49 CFR § 387.9 ($1,000,000+ for oil and certain hazmat) — and most carry $1,000,000 because broker and shipper contracts require it. Intrastate minimums vary by state.
I'm leased on to a carrier — what do I need to buy myself?
Typically bobtail or non-trucking liability, physical damage on your tractor, and non-owned trailer coverage if your lease makes you responsible for the carrier’s trailers. Your lease agreement lists the specifics.
Does my truck policy cover the trailer and the cargo?
Not automatically. Trailers you own are scheduled on physical damage; trailers you pull but don’t own need interchange or non-owned trailer coverage; and the freight itself needs motor truck cargo coverage. Each is its own piece.
Why is insurance so expensive for new authorities?
No operating history means underwriters price the unknown. Rates typically improve meaningfully after the first clean year — and quoting through an agency that works with new ventures regularly helps you find the carriers that actually want that business.
Does a reefer or flatbed cost more to insure than a dry van?
Often, because the cargo exposure differs: reefers carry perishables (and reefer-breakdown protection is its own endorsement to ask about), while flatbeds add load-securement exposure. The tractor coverage is similar — the freight behind it drives the difference.
How fast can I get proof of coverage?
Certificates go out the same day — most within two hours — so a shipper or broker’s COI requirement never has to idle the truck.
Reviewed by Scott W. Powers, Licensed Insurance Agent (NPN 9719382). Last reviewed August 2026.
Get your semi truck insurance quote today
Tell us how the truck actually runs — radius, freight, authority — and we’ll build the program around it, not around a package name. Family-owned since 1976, licensed in 35 states, salaried non-commissioned agents, no broker fees. Call (800) 348-0017 or email quote@coasttransport.com; initial quotes typically within 24 hours.