Massachusetts Car Insurance Calculators: Instant Estimates

• MoneyGeek's Massachusetts rate data comes from Quadrant Information Services, which pulls premium data directly from insurer filings with state regulators. Every rate filed in Massachusetts is a matter of public record.
• We track every residential ZIP code in Massachusetts and update rates monthly.
• Mark Fitzpatrick, a Licensed Property and Casualty Insurance Producer, and Mark Friedlander of the Insurance Information Institute are our reviewers of all content on this page.
• Our editorial standards keep our recommendations free from any influence by carrier relationships. Our rating guidelines apply the same criteria to every insurer we analyze.

Allstate and Travelers are the most nationally advertised insurance companies in Massachusetts. They're also the most expensive, at $138 and $151 a month for full coverage. The cheapest car insurance company in Massachusetts is Plymouth Rock Insurance, founded in 1982 by the former Massachusetts insurance commissioner, which charges $67 for identical coverage on the same driver profile. $67 a month reflects 40 years of Massachusetts-specific actuarial data. National brands entered managed competition without it and priced conservatively to compensate.

Plymouth Rock doesn't appear first in most national comparison flows, but it's available through comparison tools. Get at least three quotes and include Plymouth Rock.

The most expensive insurance address in Massachusetts isn't Boston. It's Roxbury Crossing, a specific Boston neighborhood, where minimum coverage runs $113 a month. Boston, as a city, runs $53. That $60 gap between two addresses in the same city exceeds the $54 statewide gap between minimum and full coverage. The full coverage spread between the state's most and least expensive ZIP codes is $172 a month, or $2,064 a year.

A driver who enters "Boston, MA" into a comparison tool gets the $53 city average. An address in Roxbury Crossing generates $113. That $60 difference shows up at checkout, not in the initial comparison. Use the ZIP code calculator above with your specific address.

Every piece of standard advice about car insurance says rates drop at 25. In Massachusetts, the sharpest drop comes at 22. State Farm, the cheapest insurance company for young Massachusetts drivers, drops from $93 to $49 a month at age 22, a 47% reduction. Three years of overpaying is what following the advice written for a different state costs.

Young Massachusetts drivers pay $226 a month for full coverage, 2.28 times the average for adults. The 2.28 multiplier is slightly below the national average of 2.4, but timing matters more than the multiplier. Re-shop at 22 to capture the largest age based savings.

Massachusetts bans insurance companies from using credit scores in pricing. The ban removes the largest soft-rate variable available in 46 other states. The lever that replaced credit scoring is mileage, and most qualifying drivers don't claim it.

Drivers who log fewer than 5,000 miles annually qualify for a 10% rate reduction, about $10 a month on the Massachusetts average. The discount doesn't apply automatically. Drivers must file a Low Mileage Form to activate it. The MBTA carries more daily riders than all but three transit systems in the country. If you commute by train and drive often, please file the form to lock in the savings legally afforded to you.

In Massachusetts, your carrier choice matters more after a violation than before one. Under managed competition, each Massachusetts insurance company files its own rate schedule with the Division of Insurance. The same at-fault accident adds $14 a month at Arbella and $90 at Farmers, a 6.4-times range for an identical violation. A DUI adds $22 at Progressive and $138 at Allstate.

Massachusetts's SDIP record window is six years, not three. The first rate reduction after a violation comes at month 37, once three consecutive clean policy years are logged. A driver paying $235 a month at Travelers after an at-fault accident could pay $102 at Plymouth Rock Insurance today, not after the record clears. Re-shop after any violation before assuming you're stuck.

Massachusetts updated its minimum coverage limits in July 2025, the first change since 1988: property damage from $5,000 to $30,000, bodily injury from $20,000 to $25,000 per person. Even at those updated limits, $25,000 bodily injury coverage covers less than half the $57,000 national average hospitalization cost. Full coverage costs $99 a month. Minimum coverage costs $45.

Policies that were renewed before July 1, 2025, may still carry the $5,000 property damage floor. That limit wouldn't cover a rear bumper replacement on most vehicles today. Drivers with financed vehicles need full coverage. Everyone else should use the coverage calculator below.

You can't add comprehensive coverage to a Massachusetts vehicle on the same day you decide to. Massachusetts requires a CARCO physical inspection before coverage activates on a vehicle that doesn't already carry it. A driver who buys a used car and decides to add comprehensive coverage that day can't have it. The inspection has to happen first.

Nor'easters, flooding, and ice storms affect virtually every Massachusetts community, and weather-related claims have risen in recent years. Auto theft rose 16% in 2022, per the National Insurance Crime Bureau. For an older vehicle, compare its current market value against $3,564, which is 36 months at the Massachusetts full coverage average. A vehicle worth less than that doesn't need comprehensive.

• Bodily injury liability: Massachusetts requires $25,000 per person and $50,000 per accident. The average car accident hospitalization costs $57,000. MoneyGeek recommends 100/300 limits for drivers with assets to protect; the cost difference between minimum and 100/300 is typically $15 to $30 a month.
• Property damage liability: If you renewed before July 1, 2025, your policy may still carry the $5,000 property damage floor that Massachusetts kept unchanged for 37 years. The July 2025 update raised it to $30,000. Confirm the updated limit appears on your declarations page. The $30,000 floor covers moderate damage but falls short of covering the cost of replacing most newer vehicles.
• Uninsured and underinsured motorist coverage: Massachusetts requires UM on every policy at $25,000/$50,000. No driver can waive it. Underinsured motorist coverage, which pays when the at-fault driver's limits fall short of your actual damages, is optional. Drivers who carry 100/300 bodily injury limits should add matching UIM limits.
• Collision and comprehensive: Lenders require both on financed or leased vehicles. Comprehensive covers flooding, hail, ice storms, theft, and vandalism. In Massachusetts, nor'easters and coastal storms create weather risk across virtually every ZIP code in the state. Adding comprehensive coverage to a vehicle that doesn't carry it requires a CARCO physical inspection; coverage doesn't activate until the inspection is complete. Drivers who own outright and are weighing whether to keep comprehensive should compare the vehicle value against $3,564, which is three years of Massachusetts full coverage premiums at the $99 average.
• Gap insurance: Pays the difference between the car's actual cash value and the remaining loan balance if it's totaled. Any driver with a recently financed vehicle whose loan balance exceeds the current market value should add it. The dealer or carrier can provide it at the time of financing.
• No SR-22 in Massachusetts: Massachusetts eliminated its SR-22 requirement in July 2018. Drivers reinstating a suspended license work directly with the Registry of Motor Vehicles. No insurance company filing required. Some insurance companies won't write policies for drivers with recent DUIs or serious violations. Drivers in that situation should contact carriers that specialize in high-risk coverage.