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Compare nearby storage unitsGreenwich CT Mill Rate & Property Taxes (2026-27)
The Town of Greenwich mill rate for FY2026-27 is 10.125, the lowest in Connecticut, about $14,175 a year on a $2 million home. But the 2025 revaluation raised many assessments, so a lower mill rate does not automatically mean a lower bill.
6 min read
Updated November 2026
10.125
FY2026-27 mill rate
~0.71%
Effective rate of market value
6.35%
CT sales tax (no local add-on)
How Greenwich property tax is calculated
Connecticut towns set a mill rate each year. One mill equals $1 of tax for every $1,000 of a property's assessed value. Greenwich's mill rate for fiscal year 2026-27 is 10.125, or $10.125 per $1,000 assessed. The Board of Estimate and Taxation adopted it on May 18, 2026, down from 12.041 the year before, as the Town of Greenwich FY2026-27 Final Budget shows (Budget Schedules, page 1). A $542.4 million budget now sits on a much larger post-revaluation grand list. Separate sewer mill rates of 0.268 (maintenance) and 0.091 (improvement) apply to property on the Sewer Fund grand list, per the Connecticut mill rate dataset.
Connecticut assesses property at 70% of market value, not 100%. So the town assesses a home worth $2,000,000 on the market at $1,400,000. Your tax is the assessed value times the mill rate:
$2,000,000 market value
× 70% assessment ratio = $1,400,000 assessed
× 0.01012 mill rate
= $14,175 per year
That works out to an effective rate of roughly 0.71% of market value. The 2025 revaluation reset every assessment as of October 1, 2025. Those new numbers showed up on the July 2026 tax bill.
The revaluation trap
Lowest mill rate in Connecticut ≠ a lower tax bill
Greenwich dropped the mill rate from 12.041 to 10.125 after the 2025 revaluation. Average residential assessments rose about 27%. On a home that paid $16,857 last year, here is what the new bill looks like depending on how far your assessment moved.
Town average (+27%)$17,993 · +7%
Mill-rate cut almost offsets the new assessment.
Hot pocket like Old Greenwich (+40%)$19,835 · +18%
Rate cut is not enough. The July bill still jumps.
Slower pocket (+15%)$16,293 · −3%
This is who actually got a cut.
Ask for the post-revaluation assessed value, not last year's tax bill. A seller's FY2025-26 bill is outdated.
Sample tax bills by home price
| Market value | Assessed (70%) | Annual tax |
|---|---|---|
| $1,000,000 | $700,000 | ~$7,088 |
| $2,000,000 | $1,400,000 | ~$14,175 |
| $3,500,000 | $2,450,000 | ~$24,806 |
| $5,000,000 | $3,500,000 | ~$35,438 |
Estimates using the 10.125 mill rate and 70% assessment ratio on the stated market value. Actual bills use the post-revaluation assessed value on the field card.
Still looking for the house to run these numbers on? Since October 1, 2026, when a listing agent markets a Greenwich home in public, it also has to be on the MLS or another open listing site. Owners selling on their own are not covered. Our guide to Connecticut's private listings law explains which homes can still sell without being listed.
When are Greenwich property taxes due?
Greenwich bills real estate tax in two installments, due July 1 and January 1. Each one has a month of grace. Pay the July bill by August 1 and the January bill by February 1, or by the next business day if that date lands on a weekend or holiday. After that, interest runs at 1.5% a month (18% a year) from the original due date, with a $2 minimum.
For FY2026-27, the second half of the bill is due January 1, 2027, and you can pay it without interest through February 1, 2027. Car tax is a single July 1 bill. A car registered after October 1 gets a supplemental bill due the following January 1.
- Online: bank transfer for a $2 fee, or card for 2.5%. The fee goes to the payment vendor, not the town.
- By mail: Tax Collector, P.O. Box 3002, Greenwich, CT 06836-3002.
- In person: Town Hall, 101 Field Point Road, weekdays 8:30 a.m. to 3:30 p.m.
Not getting a bill doesn't excuse a late payment, so call the Tax Collector at 203-622-7891 if yours hasn't shown up. Owners 65 and older who meet the income limits can apply for town tax relief between February 1 and May 15. Dates and fees are from the Greenwich Tax Collector FAQ. If you're still budgeting the move, the Greenwich cost of living guide puts the tax bill next to housing, childcare and commuting costs.
How Greenwich compares to nearby towns
Despite its reputation, Greenwich has the lowest mill rate in Connecticut. The expense here is the price of the house. The August 2026 single-family median was $3.95 million (see the Greenwich housing market update). Still compare the assessed value on the specific property, because Old Greenwich, Riverside, and Cos Cob often appreciated faster than the town average.
Property tax rate
Mill rates, side by side
A mill is $1 of tax per $1,000 of assessed value. Connecticut assesses at 70% of market. Lower mill rate does not always mean a lower bill if your assessment jumped.
Greenwich10.125 mills
FY2026-27. Lowest in the state.
Westport13.2 mills
FY2026-27. Mill dropped from 18.86 after reval.
Darien16.05 mills
FY2026-27, approved May 2026.
New Canaan16.967 mills
FY2026-27, approved June 2026.
Stamford District A25.14 mills
FY2026-27. Four tax districts in the city.
| Town | Mill rate | vs Greenwich |
|---|---|---|
| Greenwich | 10.125 | Lowest in Connecticut |
| Westport | 13.2 | Also just revalued; mill dropped from 18.86 |
| Darien | 16.05 | 59% higher than Greenwich |
| New Canaan | 16.967 | 68% higher than Greenwich |
| Stamford (District A) | 25.14 | About 2.5x Greenwich |
Against New York, the gap is even wider. Westchester County towns like Scarsdale (~1.97% effective) and Rye(~1.17%) carry some of the highest property taxes in the country, well above Greenwich's ~0.71%. That gap, plus Connecticut's lack of a separate municipal income tax, is a major reason high earners relocate across the state line.
Sales, income & car taxes
- Sales tax: Connecticut charges a flat 6.35% statewide with no local sales tax, so Greenwich's rate is 6.35%. The state taxes luxury items (cars over $50,000, jewelry over $5,000) at 7.75%.
- State income tax: Connecticut has a progressive state income tax topping out around 6.99%. Unlike New York City, though, there is no municipal income tax.
- Motor vehicle tax: The town taxes cars on assessed value using a statewide cap and bills annually.
Let's Chat About Your Move
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Greenwich Property Tax FAQ
What is the Greenwich CT mill rate for 2026?
The Town of Greenwich mill rate for fiscal year 2026-27 (July 1, 2026 to June 30, 2027) is 10.125 mills, adopted by the Board of Estimate and Taxation on May 18, 2026 and published in the Town's FY2026-27 Final Budget. That is down from 12.041 in fiscal year 2025-26. A mill is $1 of tax per $1,000 of assessed value. Property in Connecticut is assessed at 70% of market value, so the effective rate is about 0.71% of a home's market value. Your bill still depends on the new post-revaluation assessment.
How much are property taxes on a $2 million home in Greenwich?
A $2,000,000 market-value home is assessed at 70%, or $1,400,000. Multiply by the 10.125 mill rate (0.010125) and the annual tax is about $14,175, if that $2M is the current assessed market. A $1M home runs about $7,088 and a $5M home about $35,438 per year. The 2025 revaluation raised many homes' assessments, so use the new assessed value, not last year's bill.
When are Greenwich CT property taxes due?
Greenwich bills real estate tax in two installments, due July 1 and January 1. The July installment can be paid without interest through August 1, and the January installment through February 1, or the next business day if that date falls on a weekend or holiday. For FY2026-27, the second installment is due January 1, 2027 and is interest-free through February 1, 2027. Late payments owe 1.5% a month (18% a year) from the due date, with a $2 minimum.
What is the sales tax in Greenwich CT?
Connecticut has a single statewide sales tax of 6.35% with no additional local or municipal sales tax, so the sales tax in Greenwich is 6.35%. The state taxes certain luxury goods (such as vehicles over $50,000 and jewelry over $5,000) at a higher 7.75% rate.
Are Greenwich property taxes lower than New York?
Yes, significantly. Greenwich's effective property tax (~0.71% of market value at the 10.125 mill rate) is well below neighboring Westchester County, NY towns like Scarsdale (~1.97%) and Rye (~1.17%). Connecticut also has no separate municipal income tax, which is part of why many high earners relocate from NYC to Greenwich.
Why is Greenwich CT so expensive?
Home prices make Greenwich expensive. The FY2026-27 mill rate of 10.125 is the lowest in Connecticut. But the 2025 revaluation raised average residential assessments about 27%, so some neighborhoods, especially Old Greenwich, Riverside, and Cos Cob, still saw higher bills even as the mill rate dropped.
How does Greenwich's mill rate compare to nearby towns?
Greenwich's 10.125 mill rate (FY2026-27) is the lowest in Connecticut. Darien is 16.05, New Canaan 16.967, and Stamford District A 25.14, all for FY2026-27. On the same assessed home, a Greenwich owner pays much less than owners in those towns. Neighboring towns revalue on their own schedules, so compare the actual assessed value, not just the mill rate.
Related Guides
Cost of Living in Greenwich CT
Home prices, childcare, and daily expenses with real 2026 numbers.
Moving to Greenwich CT
The complete 2026 relocation guide, by origin city.
Greenwich vs Darien
Compare taxes, schools, and commute between the two towns.
Scarsdale vs Greenwich
The NY-vs-CT tax gap, head to head.
Greenwich Schools Guide
What your property taxes pay for: the public schools.
Greenwich Neighborhoods
Explore Old Greenwich, Riverside, Cos Cob, Belle Haven and more.
Last updated: November 3, 2026. Mill rate 10.125 from the Town of Greenwich FY2026-27 Final Budget, adopted by the BET on May 18, 2026. Darien 16.05 (RTM, May 2026) and New Canaan 16.967 (Board of Finance, June 9, 2026) are FY2026-27 rates. Estimates are guidance, not tax advice. Confirm the assessed value and any sewer millage with the Town of Greenwich Assessor.
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