Commercial Auto Coverage Symbols Explained: ISO Guide 2026

Open the declarations page of any commercial truck policy and you will see one or two digits next to each coverage line: 1, 7, 8, 9. Those digits are ISO covered auto designation symbols, and they decide whether a claim gets paid at all. On the standard Business Auto Coverage Form — ISO form CA 00 01, current edition CA 00 01 11 20 — the symbol next to Covered Autos Liability tells the insurer exactly which vehicles are insured. For an owner-operator who swaps a 2015 Freightliner for a 2019 Volvo mid-term, that single digit matters more than the premium.

What do the numbers on a commercial auto declarations page mean?

The CA 00 01 form defines ten symbols. Here is the full list with the question that matters most to a trucker: if I buy another truck mid-term, is it covered automatically?

Symbol	What it covers	New truck covered automatically?
1	Any auto — owned, hired, non-owned (broadest; typically liability only)	Yes
2	Owned autos only	Yes, until the end of the policy period
3	Owned private passenger autos only	Yes (that type only)
4	Owned autos other than private passenger	Yes (that type only)
5	Owned autos subject to no-fault (PIP states)	Yes
6	Owned autos subject to a compulsory uninsured motorists law	Yes
7	Specifically described autos — only the VINs listed on the schedule	No — only with conditions plus notice within 30 days
8	Hired autos — leased, hired, rented or borrowed (NOT from your employees, partners or their household members)	n/a
9	Non-owned autos — autos used in your business that you do not own, lease, hire or borrow, including employees' personal cars	n/a
19	Mobile equipment subject to a compulsory or financial responsibility law (registered off-road-type equipment)	Yes

Why does a symbol-7-only policy create a gap when you swap or add a truck?

A typical scenario (an illustrative composite, not a real client): Danila Rybak, an owner-operator from New Jersey, sells his old tractor and buys a replacement at a truck auction on Wednesday. He is loaded and rolling by Friday and plans to call his agent "next week." His liability coverage carries symbol 7 only. If he hits someone on Saturday, the insurer can lawfully deny the claim — the new VIN is not on the schedule, and the newly acquired auto conditions have not been met yet.

It gets worse for a second truck. Under symbol 7, an added (not replacement) truck is covered only if the same insurer already covers all autos you own. An owner-operator running two tractors insured with two different carriers gets zero automatic coverage on truck number three — even inside the 30-day window.

What exactly does the CA 00 01 newly acquired auto provision say?

• Symbols 1-6 or 19: autos of the type described that you acquire during the policy period are covered automatically for the remainder of the term. No 30-day scramble.
• Symbol 7: a newly acquired auto is covered only if (a) the insurer already covers all autos you own for that coverage, or the new unit replaces a previously owned auto that had that coverage, and (b) you tell the insurer within 30 days after you acquire it that you want that coverage.
• Physical damage is almost always written on symbol 7, so the 30-day clock applies to your collision and comprehensive too — calendar it the day you sign the bill of sale.

Do not count on the federal MCS-90 endorsement to save you. It forces the insurer to pay an injured member of the public even for an unlisted truck in interstate for-hire operation — but the insurer can then demand full reimbursement from you. The FMCSA minimums it backs are set by 49 CFR 387.9: 750,000 dollars for general freight, 1,000,000 for oil, up to 5,000,000 for certain hazmat — and most brokers require 1,000,000 regardless. Filing details are on fmcsa.dot.gov.

Which symbol combinations should owner-operators and fleets ask for?

• Owner-operator, 1-3 trucks: liability on symbols 7 + 8 + 9 (described autos plus hired plus non-owned), physical damage on 7. The 8 and 9 cost little and close the rental-truck and personal-errand gaps.
• Growing fleet: symbol 1 (any auto) for liability is the gold standard but rarely offered in trucking; the usual compromise is 2 + 8 + 9. Remember that insurance educators warn the combination 2+8+9 does not equal symbol 1 — edge cases still fall through.
• For-hire motor carriers are often written on the Motor Carrier Coverage Form CA 00 20 instead, which renumbers everything: 61 any auto, 67 specifically described autos, 68 hired autos, 69 non-owned trailers under a written interchange agreement, 71 non-owned autos.

What should you ask your agent before signing?

1. Which symbol sits next to each coverage line — liability, physical damage, UM/UIM, medical payments?
2. If I buy a truck on Friday night, when does coverage start and exactly whom do I notify — email, portal, phone?
3. Is my policy the Business Auto form CA 00 01 or the Motor Carrier form CA 00 20?
4. Does my quote include symbols 8 and 9, or symbol 7 only?
5. How is a newly acquired truck valued for physical damage before it is formally scheduled?
6. Do I need trailer interchange coverage (symbol 69 territory) for the trailers I pull?
7. Can I get the symbol list confirmed in writing before binding?

Many Russian-speaking owner-operators buy trucks fast — auction on Wednesday, load on Friday — while the declarations page sits unread in English. If you want the symbols on your quote checked before you bind, TruckSafe connects carriers with licensed insurance professionals who explain the fine print in Russian or English: call (315) 871-0833. TruckSafe is not a licensed insurance agency; it is a referral platform that matches you with licensed professionals.