How Connecticut property tax works
Property tax in Connecticut is calculated by multiplying your assessed value by the local mill rate and dividing by 1,000. One mill equals $1 of tax per $1,000 of assessed value.
What is a mill rate?
Each municipality sets its mill rate when adopting the annual budget. Rates vary widely — from under 20 mills in some towns to over 40 in others. Our data comes from the CT Open Data mill rates dataset.
Assessed value vs. market value
Most Connecticut residential property is assessed at 70% of fair market value, though revaluation cycles vary by town. Use your assessment notice for the most accurate input.