DOT Insurance Requirements: What You Need, What It Costs, and What Happens When It Lapses

Insurance is the single biggest operating expense for most small carriers. And FMCSA doesn't just require you to have insurance — they require specific minimums, a specific filing method, and continuous coverage. Let your policy lapse for even a day? Your authority starts the revocation clock.

Minimum Coverage Requirements (Part 387)

• General freight (non-hazmat): $750,000 public liability
• Oil transport (hazmat): $1,000,000 public liability
• Other hazardous materials: $5,000,000 public liability
• Passenger carriers (16+ seats): $5,000,000 public liability
• Freight brokers: $75,000 surety bond or trust fund (BMC-84/85)

These are minimums. Most carriers carry $1M or more even for general freight because shippers require it. Good luck getting freight from a major shipper with only $750K coverage.

The BMC-91 Filing

Your insurance company must file a Form BMC-91 electronically with FMCSA. This is how the government knows you have active coverage. You can check your filing status at safer.fmcsa.dot.gov.

Some insurance agencies are slow to file. After binding your policy, call FMCSA or check SAFER within 48 hours to confirm the filing shows up. Don't assume it's done — verify it.

What Happens When Insurance Lapses

Here's the sequence:

1. Your insurer files a BMC-35 (cancellation notice) with FMCSA
2. FMCSA sends you a letter giving you 30 days to file new coverage
3. If no new BMC-91 is filed within 30 days, your operating authority is revoked
4. If you continue operating without authority — up to $16,864 per violation

We've talked to carriers who switched insurance companies and assumed there was automatic continuity. There isn't. You need the new insurer to file a new BMC-91 before the old one expires. Overlap, don't gap.

Reducing Your Premiums

• Clean CSA scores can save you 15-30% on premiums.
• Dash cameras — many insurers offer discounts for forward-facing cams.
• Safety programs — documented driver training and policies show insurers you're serious.
• Higher deductibles — if your cash flow supports it, a higher deductible lowers your premium.
• Shop annually — trucking insurance is one market where loyalty doesn't always pay. Get quotes every renewal.