← Glossary

Overassessment

When a property’s assessed value exceeds its true market value, so the owner overpays tax.

An overassessment happens when the county values your property higher than it would actually sell for. Because your tax bill is based on that value, an overassessment means you overpay every year until it’s corrected.

It’s common: the National Taxpayers Union Foundation estimates 30–60% of US homes are over-assessed, largely because counties value thousands of properties at once using formulas that inevitably contain errors.

The fix is to file an appeal with comparable sales showing a lower value. Check yours for $4.99.

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