National Interstate review: coverage, captives and claims

What National Interstate is and how buying works

National Interstate Insurance Company is an insurer that focuses on commercial transportation. It is headquartered in Richfield, Ohio, with an office in Kapolei, Hawaii. Its about page says it was formed in 1989 with Great American as an investor, initially to serve passenger transportation, and that it is now a member of Great American Insurance Group, whose companies are subsidiaries of American Financial Group, Inc. (NYSE: AFG).

Vanliner Insurance Company, a wholly owned subsidiary, was launched in 1978 by moving and storage operators and now writes moving, storage and last-mile delivery business. National Interstate says it is licensed in all 50 states, that the two companies write over $1 billion in gross premium and, as of November 2026, that it is rated A+ (Superior) by AM Best.

You cannot buy a policy online. National Interstate sells through producers (agents and brokers), and the model varies by program: the truck page cites an “exclusive distribution network of producers”, the tow and ambulance programs use an open-broker network, Vanliner uses appointed brokers and the Hawaii and Alaska office uses a limited agency network. Every program page we reviewed lists interest-free installment plans.

Coverage it offers and for whom

Each National Interstate program page states the type of operation it is designed for. The table summarizes the main ones as of November 2026.

The site also lists programs for crane, rigging and heavy haul, demolition, energy, forestry and waste operations, plus OpenRoad collector car insurance. In Hawaii and Alaska it also writes general commercial policies for small and mid-sized businesses such as retailers, contractors, janitorial firms and restaurants with liquor sales under 25% of sales.

First-dollar, deductible and captive programs

Each program offers a first-dollar policy, which National Interstate describes as guaranteed cost with all risk transferred to the insurer, and deductible options that lower the upfront premium. Its main distinction is the group rental captive: members with similar operations pay premium into a shared program and, over time and with good loss experience, part of that premium plus investment income may be returned.

National Interstate says it launched its first group rental captive in 2001, requires no upfront capitalization and expects members to show strong safety and financial history. It also issues policies and handles claims for member-owned captives managed by Captive Resources, LLC. Other niche captives include MEDIC for ambulance, Mobility for NEMT and TranzCap for limousines.

Who it suits and who it may not

Based on the eligibility it publishes, National Interstate’s programs fit established fleets and specialty operators more than one-truck startups.

The truck program is not aimed at a single-truck owner-operator or a new authority. National Interstate refers trucking owner-operators to Great American Insurance Group’s trucking division for physical damage, non-trucking liability, occupational accident and contingent liability. Van operators are the exception: Vanliner’s owner-operator plan, sold through its in-house agency TransProtection Service Company and appointed brokers, includes non-trucking liability with $1,000,000 limits.

Tow fleets under 15 power units and ambulance fleets under 5 units fall below the stated program sizes, there is no online quoting and general commercial policies are described only for Hawaii and Alaska.

The operations its published programs line up with:

• For-hire trucking fleets of 5 or more units, and fleets of 20 or more for a group captive
• Motorcoach, school bus, transit, limousine and NEMT operators, including one-unit motorcoach owner-operators
• Towing companies with 15 or more power units that need on-hook and garagekeepers coverage
• Moving and storage companies, including Allied and North American Van Lines agents through the Forum captive
• Businesses based in Hawaii or Alaska, for transportation and general commercial coverage

How claims and service work

National Interstate says its claims specialists take new claims and updates 24 hours a day, 7 days a week, and asks that catastrophic claims be reported by phone. The numbers it lists are 800-929-0870 for National Interstate, 800-325-3619 for Vanliner and 800-316-9167 for the Hawaii office, with email options for each.

The company says it uses in-house auto and workers’ compensation claims staff, a 24/7 catastrophic response team and outside networks for subrogation, repairs and fraud investigation. You and your agent can track claims in its NAV I.Q. online portal. To report a claim, have ready:

• Your name and contact details
• Your connection to the claim (policyholder, agent, injured party)
• Your policy number, if available
• The type of loss, such as auto, general liability or workers’ comp
• Details of the incident

What to compare and ask before buying

Captive and deductible programs change how much risk you keep, so compare total cost over several years, not just first-year premium. Ask your agent:

• Which structure you are quoted (first-dollar, deductible or captive) and how much you retain per loss
• For a captive, how returned premium is calculated and paid, what collateral is required and how exit works
• Which company issues the policy: National Interstate, Vanliner or another Great American company
• Whether cargo, on-hook, trailer interchange or movers’ liability limits match your contracts
• What loss control or telematics participation the program expects

How it fits with getting several quotes

Because National Interstate sells only through producers and some programs are by appointment only, you can get a quote only through an agent or broker with access to the program you need. Its size rules also mean a 3-truck fleet and a 150-truck fleet may be offered very different structures.

Comparing it with other transportation insurers on the same limits and deductibles shows whether a captive’s potential return outweighs a lower guaranteed-cost premium elsewhere. A broker such as Florin can compare quotes from several insurers for your operation.