New Canaan property tax is calculated by applying the town’s mill rate to your home’s assessed value, which Connecticut sets at 70% of fair market value. For the 2026 fiscal year, the Board of Finance adopted a mill rate of 16.691, meaning you pay roughly $16.69 for every $1,000 of assessed value. A home worth $1 million on the open market carries an assessed value of $700,000 and an annual tax bill of about $11,684.
How Your Bill Is Calculated
Every property tax bill starts with the assessor placing a value on your property. Connecticut law requires all real and personal property to be assessed at a uniform 70% of its present true and actual value.1Justia Law. Connecticut Code 12-62a – Uniform Assessment of Property If the assessor determines your home’s fair market value is $1,500,000, your assessed value is $1,050,000.
The town then applies its mill rate to that assessed value. A mill equals one dollar of tax per $1,000 of assessment.2State of Connecticut Office of Policy and Management. Mill Rates At 16.691 mills, a property assessed at $1,050,000 owes $17,525.55 for the year. To estimate your own bill, multiply your assessed value by 0.016691.
The rate can change each year when the Board of Finance adopts the annual budget, so check the new figure each spring even if your assessed value hasn’t moved. The mill rate funds public schools, police and fire, road maintenance, and other municipal services.
The Five-Year Revaluation
Connecticut requires every town to conduct a full revaluation on a five-year cycle to keep assessments in line with the market.3Justia Law. Connecticut Code 12-62 – Revaluation of Real Property New Canaan’s most recent revaluation took effect on the October 1, 2023 grand list, and the next is scheduled for 2028.4State of Connecticut Office of Policy and Management. Revaluation Schedule 2023-2037 Between revaluations, your assessed value generally stays put unless you make significant improvements or the assessor corrects an error. When a revaluation does hit, the mill rate often adjusts downward to soften the budget impact, but individual bills still swing based on how your home moved relative to the town average.
Cars and Business Personal Property
Real estate isn’t the only thing New Canaan taxes. The town applies the same mill rate to registered motor vehicles and business personal property, though these are billed once a year rather than in two installments.5Town of New Canaan. Tax Collector Motor vehicle assessments track a percentage of the vehicle’s average retail value as of the October 1 grand list date, so the tax drops as the car depreciates.
When Payments Are Due
Real estate taxes come in two installments. The first is due July 1 and the second is due January 1.6Town of New Canaan. New Canaan Taxes Due Each installment carries a grace period of roughly 30 days: the July installment can be paid without penalty through August 1, and the January installment through early February. The precise cutoff for the second installment varies slightly by year, so check your bill for the exact date.
Miss the grace period and the consequences are steep. State law imposes interest at 18% per year, or 1.5% per month, calculated back to the original due date rather than the end of the grace period.7FindLaw. Connecticut General Statutes Title 12 Section 12-146 Any fraction of a month counts as a full month, and the minimum interest charge is $2 per installment. On a $6,000 installment that’s two months late, you’d owe $180 in interest on top of the tax. The rate is set by state statute, and the Tax Collector has no authority to waive it.
How to Pay
New Canaan uses Invoice Cloud for online payments. You can pay by electronic check from a checking or savings account, by debit card, or by credit card through the town’s portal.8Town of New Canaan. Tax Bills Search and Pay Each method carries a convenience fee that goes to the processor, not the town: electronic checks cost $0.95, Visa debit cards carry a flat $3.95 fee, and credit cards run up to 2.95% of the payment amount.9Town of New Canaan. Online Payments On a $6,000 installment, that credit card fee could reach $177, so e-check is the far cheaper digital option.
You can also mail a check to the Tax Collector’s office at the address on your bill. Send it early enough to arrive well before the grace period ends. What matters is when the payment is received or postmarked, and postal delays won’t earn you leniency on interest. Include the payment coupon so staff can credit the right account. If you need a receipt for a mailed payment, include a stamped, self-addressed envelope.
Walk-in payments are accepted at Town Hall, 77 Main Street, Monday through Thursday from 7:30 a.m. to 3:30 p.m. and Friday from 7:30 a.m. to 1:30 p.m.5Town of New Canaan. Tax Collector
Exemptions and Relief Programs
Several state-mandated programs reduce the taxable value of your property or apply a credit to your bill. None of these apply automatically. Each one requires an application to the Assessor’s Office within a specific deadline.
Veterans
Connecticut requires towns to exempt a portion of property value for qualifying veterans. The basic exemption is $1,000 off assessed value for veterans who served during a designated wartime period.10Justia Law. Connecticut Code 12-81 – Exemptions At the current mill rate, that works out to roughly $17 off the annual bill. Additional exemptions exist for veterans with disability ratings, and a veteran with a 100% permanent and total disability rating from the VA receives a full exemption on a primary residence.11Connecticut General Assembly. Veterans Property Tax Exemptions by Town – State-Mandated Exemptions File your DD-214 or other discharge documentation with the Town Clerk before applying through the Assessor’s Office.
Elderly and Disabled Homeowners
The state’s Circuit Breaker program provides a credit for homeowners who are 65 or older or totally disabled and whose income falls below set thresholds. The maximum credit is $1,250 for married couples and $1,000 for single homeowners, scaled by income on a graduated schedule.12State of Connecticut Office of Policy and Management. Homeowners Elderly/Disabled Circuit Breaker Tax Relief Program Married homeowners with qualifying income above $28,900 and unmarried homeowners above $23,600 receive no credit under the state schedule.13Connecticut General Assembly. Connecticut Code Chapter 204a – Property Tax Relief for Elderly Homeowners
Applications are accepted at the Assessor’s Office between February 1 and May 15 each year.12State of Connecticut Office of Policy and Management. Homeowners Elderly/Disabled Circuit Breaker Tax Relief Program This is an annual filing. Missing the May 15 deadline forfeits the credit for that cycle, with no way to apply retroactively. New Canaan also runs its own local tax relief program for elderly and disabled residents, which may set different income thresholds and documentation requirements.14Town of New Canaan. Chapter 57 Taxation – Article I Tax Relief for the Elderly or Disabled
Blind Residents
Legally blind residents qualify for a $3,000 reduction in assessed value on property they own or that is held in trust for them.10Justia Law. Connecticut Code 12-81 – Exemptions Documentation of the condition goes to the Assessor’s Office.
Appealing Your Assessment
If you believe the assessor overvalued your property, you can challenge it through the Board of Assessment Appeals. A successful appeal can save you hundreds or thousands of dollars every year until the next revaluation resets values.
The appeal must be filed in writing with the Board by February 20.15FindLaw. Connecticut General Statutes Title 12 Section 12-111 Your application needs a description of the property, your estimate of its value, and the reasons the assessment is wrong. Back that up with evidence: recent comparable sales in your neighborhood, a professional appraisal, or documentation of property conditions the assessor may not have accounted for, such as deferred maintenance, environmental issues, or an unfavorable location factor. Residential appraisals typically cost $450 to $1,400 depending on the property, so weigh that against the potential annual savings.
The Board notifies you of your hearing date by March 1. You present your case, and the Board can lower, raise, or leave the assessment unchanged.15FindLaw. Connecticut General Statutes Title 12 Section 12-111 The burden of proof falls on you. The existing assessment is presumed correct unless you demonstrate otherwise. The written decision arrives after the hearing and includes information on your right to further appeal.
If you’re still not satisfied, you can appeal to Superior Court within two months of the date the Board mails its decision.16Justia Law. Connecticut Code 12-117a – Appeals From Board of Assessment Appeals A court appeal is a much bigger commitment involving legal fees and potentially expert witnesses, so most homeowners resolve their disputes at the Board level.
What Happens if You Don’t Pay
Unpaid property taxes don’t just accumulate interest. They become a lien on your property. The town holds this lien automatically, and it takes priority over nearly all other claims, including your mortgage. The Tax Collector can eventually bring a court action to foreclose on the lien, and the court has authority to set a redemption deadline, order the property sold, or transfer ownership.17Connecticut General Assembly. Connecticut Code Chapter 205 – Municipal Tax Liens Foreclosure is a last resort, but at 18% annual interest, the balance grows fast.
If Your Lender Handles the Payment
If you have a mortgage, there’s a good chance your lender collects property taxes as part of your monthly payment and holds the money in an escrow account. The servicer then pays New Canaan directly on your behalf, which protects the lender’s interest in the property, since an unpaid tax lien can jump ahead of the mortgage.
Federal law caps how much your servicer can keep as a cushion for unexpected changes at one-sixth of the total estimated annual disbursements from the account.18eCFR. 12 CFR 1024.17 – Escrow Accounts If the servicer collects more than needed, because the mill rate dropped or your assessment decreased after an appeal, you’re entitled to a refund of any overage above that cushion. Your servicer must perform an annual escrow analysis and adjust your monthly payment. Review that analysis each year, especially after a revaluation, to make sure the numbers match your actual tax bill.
Deducting the Tax on Your Federal Return
New Canaan property taxes are deductible on your federal return if you itemize. The IRS allows you to deduct real property taxes and personal property taxes paid during the tax year as part of the state and local tax (SALT) deduction.19Internal Revenue Service. New and Enhanced Deductions for Individuals For 2026, the SALT deduction is capped at $40,400 for most filing statuses and $20,200 for married filing separately. The cap covers the combined total of your property taxes and either state income tax or state sales tax, so high-income Connecticut residents can hit that ceiling quickly.
Itemizing only makes sense if your total itemized deductions exceed the standard deduction. If your property taxes alone approach $12,000 to $15,000, common in New Canaan, adding mortgage interest and state income tax will often push you past the standard deduction threshold. Keep your tax bills and payment records in case the IRS requests verification.