Windsor, Connecticut property tax is proposed at 28.92 mills for fiscal year 2026, which works out to $28.92 for every $1,000 of assessed value on your real estate, motor vehicles, or business personal property.1Town of Windsor. FY26 Town Manager Budget Message Assessed value is 70% of fair market value, bills come in two installments due July 1 and January 1, and anything paid late accrues 18% annual interest back to the original due date.
What You’ll Pay
One mill equals one dollar of tax per $1,000 of assessed value. At 28.92 mills, a property with an assessed value of $210,000 (a home worth about $300,000 on the market) owes roughly $6,073 for the year before any exemptions.
Connecticut caps the motor vehicle mill rate at 32.46 statewide. Windsor’s rate sits below that cap, so the same 28.92 mills applies across real estate, vehicles, and business personal property.2State of Connecticut Office of Policy and Management. Mill Rates
How Your Property Gets Valued
Connecticut law requires every taxable property to be assessed at 70% of fair market value.3Town of Windsor. Town Assessor The Assessor’s Office locks in that value based on conditions as of October 1 each year — the Grand List date. Whatever you own and whatever it’s worth on October 1 determines the bill for the following tax year. Buy a house in November and the previous owner stays on the Grand List until the next October 1.
Full revaluations happen at least once every five years.4Justia. Connecticut Code 12-62 – Revaluation of Real Property Windsor’s most recent one hit the October 1, 2023 Grand List, and FY2026 reflects the second year of the phase-in.5Town of Windsor, Connecticut. Revaluation Results Even when the mill rate stays flat, revaluation years can shift individual bills noticeably.
Real Estate
Land and permanent structures are valued using comparable sales, construction costs, and (for commercial buildings) income potential. Revaluation resets those values to current market levels, with phase-in available to spread large increases over two years.
Motor Vehicles
Starting with the October 1, 2024 Grand List, Connecticut switched its motor vehicle valuation method. The state now begins with the manufacturer’s suggested retail price and applies a statutory depreciation schedule: 85% of MSRP in year one, 80% in year two, dropping in 5-point steps until it levels off at year fifteen. No vehicle is assessed below $500.6State of Connecticut Office of Policy and Management. Motor Vehicle Assessment Changes The 70% assessment ratio then applies to that depreciated figure. A three-year-old vehicle with a $30,000 MSRP depreciates to $22,500 and carries an assessed value of $15,750.
Register a vehicle after October 1 and it won’t appear on your regular bill. A supplemental motor vehicle bill arrives the following January covering the months left in the fiscal year. Same mill rate, same late penalties, unusual timing.
Business Personal Property
Businesses operating in Windsor must file a personal property declaration with the Assessor’s Office by November 1 each year, reporting machinery, equipment, furniture, and similar assets owned as of October 1.7Justia. Connecticut Code 12-41 – Filing of Declaration Both incorporated and unincorporated businesses must file. Missing the deadline — or leaving assets off — triggers a 25% penalty on the unreported value, and the Assessor can prepare an estimated declaration on your behalf with the penalty attached.
Due Dates and How to Pay
Windsor collects taxes in two installments. Real estate and personal property are due July 1 and January 1.8Justia. Connecticut Code 12-142 – Installments; Due Date Each bill prints a “final day to pay” roughly 30 days after the due date; payments received after that date are treated as late and interest runs from the original due date, not the final day.9Windsor, CT. Online Tax Payment
Watch the processing date on scheduled online payments. If you queue a payment before the deadline but set it to process after, you still owe interest. The date the money moves is what counts.
Payment options:9Windsor, CT. Online Tax Payment
- Electronic check through the town’s online portal is free.
- Debit card through the portal costs a flat $2.95.
- Credit card through the portal (Visa, MasterCard, Discover) costs 2.5% — $75 on a $3,000 payment.
- ACI Payments, a separate service for online or phone payments at 1-800-272-9829 using jurisdiction code 1771, accepts American Express but charges 3.97%.
- Mailed checks go to the Tax Collector at 275 Broad Street, Windsor, CT 06095; include the bill stub.
- In person at Town Hall, Monday through Friday, 8 a.m. to 5 p.m. The Tax Collector’s office is reachable at 860-285-1810.10Windsor, CT. Tax Collector
Lost your bill? Look up accounts by property address, owner name, or license plate through the town’s tax portal.11Town of Windsor. Tax Bills Search and Pay
If You Pay Late
Connecticut charges 18% annual interest on delinquent property taxes — 1.5% per month, with any partial month counting as a full month and a $2 minimum per installment.12Justia. Connecticut Code 12-146 – Delinquent Tax or Installment; Interest; Waiver of Interest The rate is set by state statute, not local discretion, so neither the Tax Collector nor the Town Council can lower it for you.
Unpaid taxes also create a lien on the property. A municipal tax lien attaches automatically and takes priority over other transfers and encumbrances, running from the October 1 assessment date through two years after the tax first became due. If the balance stays unpaid, the Tax Collector can continue the lien and ultimately pursue sale or foreclosure.13Connecticut General Assembly. Chapter 205 – Municipal Tax Liens A lien clouds your title and blocks refinancing or sale until it’s resolved.
Ways to Lower the Bill
Elderly and Disabled Homeowner Relief
Connecticut’s circuit breaker program credits property tax for homeowners who are 65 or older or totally disabled, own and live in their primary residence, and meet income limits. Credits reach up to $1,000 for single filers and $1,250 for married couples, with income ceilings around $45,200 for single filers and $55,100 for married couples (confirm current figures with the Assessor’s Office or the state Office of Policy and Management). Applications are accepted February 1 through May 15 at the Assessor’s Office.3Town of Windsor. Town Assessor
Windsor also runs a local option for residents 65 or older whose income lands above the state limits but within a higher local range (roughly $46,300 to $63,800, varying by filing status). Call the Assessor’s Office at 860-285-1817 for current details.
Veterans Exemptions
Honorably discharged veterans who served at least 90 days during a recognized wartime period, and their surviving spouses, qualify for a basic $1,000 property tax exemption. Veterans meeting additional income limits can apply for a supplemental state exemption worth up to 200% of the basic amount, and disabled veterans may qualify for larger exemptions tied to the severity of a service-connected disability.14State of Connecticut Office of Policy and Management. Additional Veterans Tax Relief Program
These programs generally require an application. They are not applied automatically.
If You Think the Assessment Is Wrong
Challenges to assessed value go to the Board of Assessment Appeals. The Board can adjust your assessment, which in turn lowers your bill, but it cannot change the mill rate.
Petitions must be filed by February 20 for the March session.3Town of Windsor. Town Assessor Miss that date and you lose your right to appear before the Board for that Grand List year. Bring evidence: recent comparable sales, an independent appraisal, or documentation of property conditions the assessor may not have seen. If the Board denies the appeal, you can escalate to Superior Court, though that involves additional time and expense.