Connecticut has no statewide property tax rate. Instead, every one of CT's 169 towns and cities sets its own mill rate — dollars of tax per $1,000 of assessed value. The result is one of the widest property tax spreads in the United States: a $400,000 home in Hartford generates a $20,720 annual tax bill, while the same home in Greenwich costs just $3,080.
This guide explains how CT property tax is calculated, why rates vary so dramatically, the relief programs available to seniors and veterans, and how the One Big Beautiful Budget Act's raised SALT deduction cap changes the math for many Connecticut homeowners.
Connecticut property tax has two moving parts: the assessed value of your property and the mill rate set by your town.
State law (CGS §12-64) requires municipalities to assess real property at 70% of its estimated fair market value (FMV). This 70% figure is called the assessment ratio or assessment percentage.
The 70% ratio applies uniformly across the state. However, because towns revalue properties on a 5-year cycle, assessed values can lag significantly behind current market prices — particularly during hot real estate markets.
Each town's board of finance sets a mill rate annually as part of the municipal budget process. One mill equals $1.00 of tax for each $1,000 of assessed value.
Formula:
Annual Property Tax = (Assessed Value ÷ 1,000) × Mill Rate
| Town | Mill Rate | Assessed Value | Annual Tax |
|---|---|---|---|
| Hartford | 74.29 | $280,000 | $20,801 |
| Waterbury | 60.21 | $280,000 | $16,859 |
| Bridgeport | 53.99 | $280,000 | $15,117 |
| New Haven | 43.88 | $280,000 | $12,286 |
| Stamford | 21.88 | $280,000 | $6,126 |
| Fairfield | 19.51 | $280,000 | $5,463 |
| Westport | 16.86 | $280,000 | $4,721 |
| Darien | 14.20 | $280,000 | $3,976 |
| Greenwich | 11.28 | $280,000 | $3,158 |
All at identical $400,000 FMV and the same 70% assessment ratio — yet the tax bill varies by nearly $17,600 per year depending solely on location.
Each October 1, the town assessor compiles the "grand list" — a record of all taxable property and their assessed values as of that date. The following fiscal year's mill rate is calculated by dividing the town's budgeted expenditures (minus other revenue) by the total grand list. Per CT OPM, the mill rates for FY 2025–2026 are based on the October 1, 2024 grand list.
The same mill rate applies not just to real estate but also to personal property (business equipment) and motor vehicles, though the motor vehicle mill rate is statutorily capped at 32.46 mills (CGS §12-71e) to limit the burden on car owners in high-mill-rate cities.
Connecticut's high property taxes are not an accident — they are a direct consequence of how the state funds local services.
Connecticut relies more heavily on local property taxes to fund municipal services than almost any other state. Each of CT's 169 municipalities is largely responsible for funding:
Unlike states that fund schools primarily through a state income tax distributed centrally, Connecticut's education aid formula leaves most of the burden on local property taxpayers. The result: your school district's budget is almost entirely your tax bill.
Connecticut consistently ranks among the top 5 states in per-pupil education spending (~$22,000–$24,000/student). That spending is financed locally. A town like Westport, with high property values and a large grand list, can achieve a low mill rate while still spending heavily on schools. A city like Hartford, with lower property values and a smaller grand list, needs an extremely high mill rate to raise the same absolute dollars per pupil.
Connecticut's municipalities compete independently for grand list growth (new development, commercial investment). There is no broad regional revenue-sharing mechanism that would allow property-rich suburbs to subsidize property-poor cities beyond the state's Education Cost Sharing (ECS) grants. When ECS grants fall short, cities raise mill rates.
Connecticut has some of the highest public sector wages, benefits, and pension obligations in the nation. Police, fire, and education employee compensation costs are borne primarily by local property taxpayers, driving mill rates upward even in years when budgets nominally stay flat.
Proposals to shift education funding from local property taxes to the state income tax have been introduced in the General Assembly repeatedly but have not passed. Until such a structural change occurs, Connecticut's property tax burden will remain among the highest in the US.
The most striking fact about Connecticut property taxes is the simultaneous existence of the state's lowest AND some of the state's highest absolute tax bills — often within 30 miles of each other.
Fairfield County towns like Greenwich, Darien, Westport, and New Canaan have the state's lowest mill rates. But they also have the state's highest home values. The result is that absolute tax bills remain very high in dollar terms, even though the effective rate is relatively low.
| Town | Mill Rate | Median Home Value | Estimated Annual Tax |
|---|---|---|---|
| Greenwich | ~11.28 | ~$1,700,000 | ~$13,430 |
| Darien | ~14.20 | ~$1,500,000 | ~$14,910 |
| Westport | ~16.86 | ~$1,400,000 | ~$16,521 |
| New Canaan | ~17.10 | ~$1,350,000 | ~$16,157 |
| Norwalk | ~23.16 | ~$575,000 | ~$9,320 |
| Bridgeport | ~53.99 | ~$230,000 | ~$8,720 |
An interesting result: a Bridgeport homeowner in a $230,000 house pays only slightly less in absolute property tax than a Norwalk homeowner in a $575,000 house — because Bridgeport's mill rate is more than twice as high.
Connecticut's three most financially stressed cities consistently carry the state's highest mill rates:
Hartford (~74 mills): The state capital has the highest mill rate in Connecticut. A heavily commercial and institutional city (UConn Health, hospitals, and state buildings are largely tax-exempt), Hartford's taxable grand list is disproportionately small relative to its population and service demands. The result is crushing property tax rates on those properties that are taxable — primarily owner-occupied homes, rental properties, and small businesses.
Waterbury (~60 mills): A former industrial city with a challenged economy, Waterbury has seen steady mill rate increases as grand list values have not kept pace with municipal budget growth.
Bridgeport (~54 mills): Connecticut's largest city by population, Bridgeport has a large portion of tax-exempt properties (hospitals, nonprofit housing, government buildings) that reduce the taxable grand list.
New Haven (~43 mills) faces similar structural issues: Yale University — the city's largest employer — is largely tax-exempt under nonprofit status, though it voluntarily contributes payments in lieu of taxes (PILOTs). Even with PILOTs, the taxable grand list is insufficient, keeping mill rates elevated.
| Town | Mill Rate | Notes |
|---|---|---|
| West Hartford | ~40.92 | Sought-after suburb, strong schools |
| Hamden | ~55.48 | New Haven suburb, financially pressured |
| East Hartford | ~49.92 | Hartford suburb |
| Glastonbury | ~36.07 | Prosperous Hartford suburb |
| Simsbury | ~31.93 | Sought-after Hartford suburb |
| Stamford | ~21.88 | Financial services hub, large grand list |
| Milford | ~29.67 | Coastal New Haven County |
When evaluating a home purchase in Connecticut, the sticker price is only part of the equation. A $400,000 home in Hamden carries a $15,534/year property tax bill versus $6,126 for the same value in Stamford — a $9,408 annual difference. Over a 30-year mortgage, that gap compounds to over $280,000 in additional property taxes (not counting future rate changes or appreciation).
Connecticut requires each municipality to revalue all taxable property at least once every five years (CGS §12-62). This creates a risk that property owners often call assessment shock — a dramatic jump in assessed value and therefore property taxes, arriving all at once after years of no change.
During a revaluation year, the town assessor (or a contracted appraisal firm) updates the estimated fair market value of every property in town as of October 1 of that year. The new assessed value equals 70% of the new FMV estimate.
Between revaluation years, assessed values are generally static (apart from new construction or improvements requiring building permits). In a town that revalued in 2020 and is due to revalue in 2025, a homeowner who bought at $500,000 in 2020 might see their assessed value jump to reflect 2025 market values — potentially a 30–50% increase in assessed value in areas with strong appreciation.
When assessed values rise across the entire town, the mill rate typically drops proportionally — because the same budget dollars are now spread across a larger total grand list. In theory, the average homeowner should see minimal change.
In practice, individual homeowners experience very different outcomes depending on whether their specific property appreciated faster or slower than the town average:
Many Connecticut towns that revalued in 2022–2023 saw dramatic FMV increases reflecting the post-pandemic housing surge. Some homeowners saw 40–70% increases in assessed value. Even with mill rate reductions, individual bills rose significantly for owners whose homes outperformed the local average.
If you believe your property's new assessed value is incorrect, you have the right to appeal:
Appeals are most successful when you can demonstrate comparable sales — recent arm's-length transactions for similar properties — that imply a lower fair market value than the assessor used.
If you purchased your home within the last 12 months before a revaluation, your purchase price is powerful evidence of fair market value. Assessors are generally reluctant to assess above a recent, documented purchase price.
Connecticut offers several state-administered property tax relief programs for eligible homeowners. The most significant are the Circuit Breaker credit for elderly and disabled homeowners and various veteran exemptions.
This is Connecticut's primary property tax relief program for seniors and totally disabled persons. Administered by the CT Office of Policy and Management (CGS §§12-170aa, 12-170bb, 12-170cc), it provides a direct credit against property taxes owed — not just a deduction.
| Filing Status | Income Limit | Maximum Credit |
|---|---|---|
| Single | $42,370 | $1,000 |
| Married (or qualifying surviving spouse) | $51,690 | $1,250 |
Credits are awarded on a graduated scale — households near the income limit receive lower credits than those with lower incomes. The full maximum credit applies to the lowest income tiers.
File Form M-35H with your local Town Assessor's Office between February 1 and May 15 of each year. The credit is applied directly to your property tax bill. Contact your assessor or the OPM Homeowner Info Line (860-418-6290) for the specific graduated schedule.
This older program, established in 1967, froze property taxes for qualifying homeowners at the benefit level from their qualifying year. No new applicants have been accepted since the 1978 program year (CGS §12-129b). It remains active only for long-standing grandfathered participants and is not available to new applicants.
Connecticut provides two tiers of property tax relief for veterans:
Totally disabled homeowners who do not qualify for the veteran's exemption may be eligible for:
Many towns offer locally funded programs beyond the state requirements. West Hartford, Greenwich, and Stamford, for example, have historically offered supplemental tax deferral or credit programs for seniors above the state income limits. Check with your local assessor as these programs vary and change with municipal budgets.
For a Hartford homeowner with a $150,000 assessed value and a 74-mill rate, the annual tax bill is $11,100. The Circuit Breaker credit of $1,000 (single) or $1,250 (married) reduces that to $10,100–$9,850 — meaningful but modest relative to the total burden. For lower-mill-rate towns, the credit covers a higher fraction of the total bill.
What makes Connecticut distinctly expensive is not property tax alone — it is the combination of high property taxes AND a meaningful state income tax. CT is one of a small number of states that imposes both.
From CT Form CT-1040 TCS (Rev. 12/25), Table B — Initial Tax Calculation (Single/MFS):
| Connecticut Taxable Income | Rate |
|---|---|
| Up to $10,000 | 2.00% |
| $10,001 – $50,000 | 4.50% |
| $50,001 – $100,000 | 5.50% |
| $100,001 – $200,000 | 6.00% |
| $200,001 – $250,000 | 6.50% |
| $250,001 – $500,000 | 6.90% |
| Over $500,000 | 6.99% |
For married filing jointly, brackets are doubled (e.g., 2% on first $20,000; 4.5% on $20,001–$100,000; etc.).
Note: CT also has a phase-out of the 2% rate for higher earners (Table C Add-Back) and a Tax Recapture at certain income levels (Table D), which effectively raise marginal rates above the stated brackets for incomes in certain ranges.
Single filers get a $15,000 personal exemption on CT AGI up to $30,000, phasing to zero by $44,000. Married filing jointly: $24,000 exemption phases out between $48,000–$71,000. These exemptions reduce CT taxable income but disappear entirely for higher earners.
Consider a married couple earning $180,000 owning a $600,000 home in West Hartford (mill rate ~41):
For context, the same couple in Florida (no income tax, ~1% property tax on $600k home = $6,000) would pay approximately $6,000/year in combined state and local taxes — a difference of nearly $20,000 per year.
Despite the tax burden, Connecticut retains residents through:
But the long-term trend of net domestic out-migration from Connecticut — particularly to Florida and the Carolinas — is partly driven by the cumulative income tax + property tax burden, especially for retirees on fixed incomes.
The One Big Beautiful Budget Act (OBBBA), signed in 2025, raised the federal State and Local Tax (SALT) deduction cap from $10,000 to $40,000 per year beginning with the 2025 tax year. This is a significant change for Connecticut homeowners who itemize federal deductions.
The SALT deduction allows itemizing taxpayers to deduct state and local taxes paid, including:
For most CT homeowners, the combined state income tax + property tax substantially exceeds $40,000 only for very high earners or owners of very expensive properties. Most CT households will now be able to deduct their full property tax bill on their federal return.
| Scenario | Property Tax | CT Income Tax | Total SALT | Deductible (Old $10k cap) | Deductible (New $40k cap) | Federal Tax Savings* |
|---|---|---|---|---|---|---|
| Modest home, middle income | $8,000 | $7,000 | $15,000 | $10,000 | $15,000 | +$1,100 |
| Mid-range home, upper-middle income | $14,000 | $12,000 | $26,000 | $10,000 | $26,000 | +$3,520 |
| High-value home, high income | $20,000 | $18,000 | $38,000 | $10,000 | $38,000 | +$6,160 |
| Very high-value home, very high income | $35,000 | $40,000 | $75,000 | $10,000 | $40,000 | +$6,600 |
*Estimated at 22% federal bracket for middle scenarios, 32% for upper scenarios.
The SALT deduction only applies if you itemize federal deductions (Schedule A). The 2025 federal standard deduction is $15,000 (single) and $30,000 (MFJ). Homeowners with significant mortgage interest, charitable contributions, and property taxes often exceed the standard deduction and benefit from itemizing.
Connecticut was the first state to enact a Pass-Through Entity Tax (PTET) as a SALT workaround for business owners. Under this mechanism, business entities pay state tax at the entity level (which is fully deductible as a business expense, not subject to SALT caps), with owners receiving a CT income tax credit. With the $40,000 SALT cap now in place, the urgency of the PTET workaround is reduced for many — but it remains valuable for owners of very profitable pass-through businesses.
Given Connecticut's high property tax environment, proactive planning can meaningfully reduce your tax burden.
Do not leave money on the table:
Revaluation years create the best opportunity to challenge your assessed value. Within 30–90 days of receiving your new assessment notice:
Sometimes assessments change mid-cycle due to building permits for additions, pools, or new structures. If you made improvements that you believe were over-valued, you can still appeal. Also, if you purchased a home recently at a price below its assessed value (divided by 70% to get implied FMV), that purchase price is evidence for appeal.
If you have flexibility in where to live within a commuting radius, mill rate differences are enormous:
Over a 30-year mortgage, these differences compound substantially. Build the property tax cost into your affordability calculation before making an offer.
If you itemize federal deductions, ensure your tax preparer is capturing the full property tax deduction now available under OBBBA. Review whether you should be itemizing even if you previously took the standard deduction — the math may now favor itemizing for many CT homeowners.
If you own a pass-through business (S-corp, partnership, LLC), consult a CT tax professional about the Pass-Through Entity Tax. Even with the raised SALT cap, high earners with significant business income may benefit from the PTET structure.
Retired homeowners in Connecticut face a compounding problem: fixed income + rising property taxes + CT income tax on pensions and Social Security (partially taxable above certain thresholds). Options:
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