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Kit car insurance is a specialized type of auto coverage designed for vehicles assembled from aftermarket parts, donor cars, or manufacturer kits. Unlike factory-built vehicles, kit cars and custom builds lack standard VINs and traditional market values. That makes them nearly impossible to insure through a regular auto policy. A standard insurer uses actual cash value to determine payouts. However, a custom-built car worth $55,000 in parts and labor might only receive a few thousand dollars under a standard policy. Kit car insurance solves this problem through agreed value coverage. Specialty carriers like Hagerty, Grundy, and J.
C. Taylor write policies specifically for these vehicles. Kit car insurance premiums can actually run up to 40% less than standard auto coverage for comparable values. The national average auto premium reached $1,438 per vehicle in 2022-2023, according to the NAIC Auto Insurance Database Report. Specialty kit car insurance often costs significantly less because these vehicles see limited road use.
Why Kit Car Insurance Requires Agreed Value Coverage
The biggest risk with insuring a custom build is undervaluation. Standard auto policies use actual cash value, which factors in depreciation. Kit cars do the opposite of depreciate. Every hour of skilled labor and every custom part adds value over time. As a result, a stated value or actual cash value policy could leave you tens of thousands of dollars short after a total loss.
Agreed value policies fix this gap. You and your insurer set a dollar amount before the policy begins. If the car is totaled, you receive that full agreed amount with no depreciation deductions. For example, Hagerty offers what they call Guaranteed Value coverage. It pays the full agreed amount including taxes and fees in most states. American Collectors Insurance also provides true agreed value with an inflation guard of up to 6% per year. This automatic adjustment helps your coverage keep pace with rising parts costs.
Stated value policies may seem similar but carry a major catch. The insurer only pays whichever is lower: the stated value or the actual cash value at the time of loss. In most cases, this results in a smaller payout than expected. For kit car insurance, agreed value is the far better choice.
Kit Car Insurance Providers and What They Cost
Several specialty insurers explicitly cover kit cars and custom builds. Each carrier has different eligibility rules, mileage limits, and premium structures. The table below compares key features across major providers.
| Insurer | Agreed Value | Mileage Limit | Notable Feature |
|---|---|---|---|
| Hagerty | Yes (Guaranteed Value) | No fixed limit | No appraisal required in most cases |
| Grundy | Yes | Unlimited (pleasure use) | No mileage caps at all |
| American Collectors | Yes | Flexible tiers | Up to 6% inflation guard |
| J.C. Taylor | Yes | Varies by plan | Up to 40% cheaper than standard |
| American Modern | Yes | 1,000 to unlimited | Covers vehicles under construction |
Kit car insurance premiums vary widely based on agreed value, horsepower, location, and driving history. However, industry estimates place average specialty coverage around $118 per month or roughly $1,416 per year. That is comparable to or below the national average standard auto premium. Most specialty carriers require no more than one moving violation in the past three years. Serious infractions like DUI or reckless driving typically disqualify applicants entirely.
One important restriction applies across all specialty carriers. Kit car insurance policies generally exclude daily commuting and business use. These vehicles must be classified as pleasure use only. That means car shows, club events, weekend drives, and occasional errands. Typically, you will also need a separate daily-driver vehicle insured under a standard policy.
How to Register, Title, and Get Kit Car Insurance
Before any insurer will write a kit car insurance policy, your vehicle needs a valid title and registration. Most states classify kit cars as Specially Constructed Vehicles, often abbreviated SPCNS. The process varies significantly by state. For example, California requires a CHP-assigned VIN, a BAR Referee Center smog inspection, and limits SPCNS registrations to 500 per calendar year through SB-100 certificates. The SEMA Action Network publishes a 50-state guide covering registration requirements for hobby and kit-built vehicles.
Once titled, you will need documentation to secure your policy. Gather all build receipts, parts invoices, and supplier records. Take detailed photos at every stage of construction. A professional appraisal strengthens your agreed value claim, though Hagerty often waives this by using internal valuation tools. Manufacturer’s Certificates of Origin for major components like the engine and transmission are also helpful. The more thorough your records, the smoother the quoting process becomes.
If your build is still in progress, consider in-construction coverage. American Modern explicitly offers policies that protect parts and labor during the build phase. This guards against fire, theft, or damage in your workshop before the vehicle is even titled. As a result, you do not have to wait until the car is road-ready to start protecting your investment with kit car insurance.
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Frequently Asked Questions
Can I get kit car insurance from a regular auto insurer like State Farm or Geico?
In most cases, standard insurers will not cover kit cars or will severely undervalue them. They rely on factory VINs and depreciation-based pricing that do not apply to custom builds. Specialty carriers like Hagerty, Grundy, or J.C. Taylor are designed specifically for kit car insurance and offer agreed value protection.
How much does kit car insurance cost compared to regular auto insurance?
Specialty kit car insurance can cost up to 40% less than a standard policy for a vehicle of similar value. However, premiums depend on the agreed value, your driving record, and your state. Typically, expect to pay around $1,400 per year for a mid-range custom build.
Do I need kit car insurance while I am still building the car?
Yes, and some insurers offer coverage specifically for vehicles under construction. American Modern, for example, covers parts and labor during the build phase. This protects against workshop fires, theft, and storm damage before your kit car ever hits the road.
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Official Sources & Resources
For verified information on auto insurance regulations and consumer protection:
- NAIC (National Association of Insurance Commissioners): naic.org
- Insurance Information Institute: iii.org
- Federal Trade Commission — Auto Insurance: consumer.ftc.gov
- USA.gov — Car Insurance: usa.gov/car-insurance
Content last reviewed May 2026. If you notice any outdated information, please contact us.