Why does a town with a median household income above $133,000 pay more for full coverage than Portland, the city next door? Car insurance in Scarborough averages $1,990 a year for full coverage, and that figure sits above both Portland's roughly $1,586 average and Maine's statewide full-coverage average of $1,704.

That's not what the income numbers predict. Scarborough usually reads as the safer bet on paper — older, wealthier, lower crime. The bill doesn't follow the paper.

The Number: $1,990 a Year, Above Everyone Nearby

Full coverage in Scarborough runs about $166 a month according to quote-rate data, roughly $400 more per year than South Portland's $1,392 average and well above the statewide $1,704 figure. Minimum-liability coverage tells almost the opposite story — about $56 a month, or $667 a year, which actually undercuts Maine's $1,262 statewide minimum-coverage average by a wide margin.

Two numbers pointing in opposite directions from the same town is the part worth explaining.

The Assumption: Higher Income Should Mean a Lower Bill

Scarborough's median household income sits at roughly $133,558, well ahead of the Portland-metro figure and close to double the statewide median. The median age is 48.8. Both traits usually correlate with fewer coverage lapses, better credit-based insurance scoring, and — in most towns — a rate that runs below average across the board.

That pattern holds for minimum liability in Scarborough, which is exactly what the low $667-a-year figure reflects. It breaks down once comprehensive coverage enters the math, because comprehensive prices the value of the vehicle and the risk to it, not just the driver holding the policy.

The Real Driver: A Marsh That's Losing Ground

Route 1 carries about 30,000 vehicles a day through Scarborough Marsh, the largest contiguous salt marsh in Maine, and the roadway now floods at high tide often enough that MaineDOT and the town are advancing a plan to raise it roughly four feet and replace the culverts running underneath. Sea-level rise and marsh erosion are the reasons the road needs the work in the first place, according to reporting on the marsh's ongoing decline.

Pine Point Road, the sole evacuation route for about 900 properties in the Pine Point beach village, runs through the same low-lying system. Add Higgins Beach a few miles south and a large share of Scarborough's vehicle fleet spends routine driving time on roads with real, documented flood exposure — a comprehensive-coverage risk that a wealthy, low-crime demographic profile doesn't offset.

Scarborough Auto Insurance at a Glance

  • Minimum liability: 50/100/25 ($50k injury per person / $100k per accident / $25k property)
  • Fault system: At-fault (tort) — same as the rest of Maine
  • Mandatory med-pay: $2,000 per person minimum
  • UM/UIM: Required at full 50/100 limits
  • Avg. full coverage: $1,990/yr, above both Portland and the state average

None of that changes because a town's income sits above the state median. Maine's legal floor is the same 50/100/25 liability everywhere, plus the mandatory med-pay and full-limit UM/UIM coverage that few other states require at all.

The Move: Spend on Comprehensive, Not Just Liability

If you're quoting a policy in Scarborough, the liability side of the bill is already working in your favor relative to the rest of Maine. Comprehensive is where it's worth paying attention — check the deductible before the next coastal storm season, especially if you're parking anywhere near Pine Point, Higgins Beach, or the Route 1 marsh crossing. For a broader look at when raising coverage past Maine's minimum actually pays off, see our minimum vs. full coverage guide.

The Maine Bureau of Insurance regulates every carrier writing policies in Scarborough the same way it does statewide — worth a quick check before signing with an insurer you don't already know.

Scarborough's income and age numbers will keep predicting a cheap policy. The marsh underneath Route 1 will keep arguing otherwise. Until MaineDOT finishes raising that road, the second number is the one showing up on the bill.