Connecticut property taxes (2026)

How Connecticut property taxes work

Connecticut has no county government — its 169 towns and cities run the property tax entirely. Every property is assessed at 70% of fair market value, mill rates apply to that 70%, and towns revalue on five-year cycles with the grand list finalized each January 31.

Payments follow a July fiscal year: the first installment is due July 1 (payable through August 1 without penalty) and the second January 1 (through February 1) in towns that bill semiannually — smaller bills are often due in one July payment. Interest on late payments runs at 1.5% per month back to the due date.

The appeal calendar is compact: written appeals to your town's Board of Assessment Appeals are due by February 20 (extended to March 20 where the town got an extension), with hearings in March–April. Court appeals from the board's decision follow within two months.

Revaluation years are the moment to act — new values land in late fall, informal hearings with the revaluation company run through winter, and the February 20 board deadline follows close behind.

When payments are due

Semiannual in most towns: due July 1 (through August 1 penalty-free) and January 1 (through February 1). Interest at 1.5%/month once late.

Exact dates can vary by county — use your county's page above for the dates on your bill.

How to appeal your assessment

The statewide rule: File a written appeal with your town's Board of Assessment Appeals by February 20 (March 20 where the town extended it); hearings follow in March–April

In revaluation years, attend the revaluation company's informal hearings first — many values get corrected there before the February deadline. Court appeals go to Superior Court within two months of the board's decision.

1. Check your assessment when the grand list postsYour assessment is 70% of the town's opinion of market value — divide by 0.70 to see the implied market value.
2. Use the informal revaluation hearings (revaluation years)The revaluation company holds informal reviews when new values mail in late fall — errors get fixed fastest here.
3. File with the Board of Assessment Appeals by February 20A short written application to your town's board (March 20 in extension towns). Filing is free.
4. Attend your March–April hearingBring comparable sales; the board can lower, sustain, or raise the assessment.
5. Escalate if neededAppeal to Superior Court within two months of the board's notice.

County pages have the exact local deadlines, forms, and filing links.

Statewide exemptions

Reassessment

Each town revalues every five years (physical inspection every ten). Assessments sit at 70% of the revaluation-year market value until the next cycle.

Value notices (Revaluation notice) usually mail in late fall (revaluation years).

Common questions

When are property taxes due in Connecticut?

July 1 and January 1 in most towns, each with a one-month grace period (through August 1 and February 1). Miss the grace window and 1.5% monthly interest reaches back to the due date.

How do I appeal my Connecticut assessment?

File a written appeal with your town's Board of Assessment Appeals by February 20 (March 20 in towns that extended). Hearings run March–April; in revaluation years, hit the informal revaluation hearings first.

Why is my assessment lower than my home's value?

Connecticut assesses at 70% of fair market value — the mill rate applies to that 70%. To see what the town thinks your home is worth, divide the assessment by 0.70.

When does my town revalue?

Every five years, on the town's own schedule. New values arrive in late fall of the revaluation year and hold (absent appeals or changes) until the next one — which is why revaluation-year jumps feel so sharp.

What relief exists for Connecticut seniors and veterans?

The state circuit breaker credits income-qualified homeowners 65+ or disabled; veterans get assessment exemptions (now a full exemption for 100% disabled veterans); and many towns layer local freezes and deferrals on top. All run through your town assessor.