Greenwich CT Property Taxes & Mill Rate (2026)
The Town of Greenwich mill rate for FY2026-27 is 10.12, the lowest in Connecticut, about $14,168 a year on a $2 million home. The catch: the 2025 revaluation raised many assessments, so a lower mill rate does not automatically mean a lower bill.
10.12
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 10.12, or about $10.12 per $1,000 assessed. That is down from 12.041 the year before, after the Board of Estimate and Taxation set a $542.4 million budget against a much larger post-revaluation grand list.
Connecticut assesses property at 70% of market value, not 100%. So a home worth $2,000,000 on the market is assessed 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
= $14,168 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 10.12 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.
Mill-rate cut almost offsets the new assessment.
Rate cut is not enough. The July bill can still jump.
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 A seller's FY2025-26 bill is outdated.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 | ~$7,084 |
| $2,000,000 | $1,400,000 | ~$14,168 |
| $3,500,000 | $2,450,000 | ~$24,794 |
| $5,000,000 | $3,500,000 | ~$35,420 |
Estimates using the 10.12 mill rate and 70% assessment ratio on the stated market value. Actual bills use the post-revaluation assessed value on the field card.
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, not the tax percentage. 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.
FY2026-27. Lowest in the state.
FY2026-27. Mill dropped from 18.86 after reval.
FY2025-26 published rate.
FY2025-26 published rate.
FY2025-26. Four tax districts in the city.
| Town | Mill rate | vs Greenwich |
|---|---|---|
| Greenwich | 10.12 | Lowest in Connecticut |
| Westport | 13.2 | Also just revalued; mill dropped from 18.86 |
| Darien | 15.48 | 53% higher than Greenwich |
| New Canaan | 16.69 | 65% higher than Greenwich |
| Stamford (District A) | 27.17 | Nearly 3x 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%. Combined with Connecticut having no separate municipal income tax, that's 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%. Luxury items (cars over $50,000, jewelry over $5,000) are taxed 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: Cars are taxed on assessed value using a statewide cap, billed annually by the town.
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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 is 10.12 mills, down from 12.041 the prior year. 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 10.12 mill rate (0.01012) and the annual tax is about $14,168, if that $2M is the current assessed market. A $1M home runs about $7,084 and a $5M home about $35,420 per year. After revaluation, many homes were reassessed higher, so use the new assessed value, not last year's bill.
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%. Certain luxury goods (such as vehicles over $50,000 and jewelry over $5,000) are taxed 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 10.12 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?
Greenwich's cost is driven by home prices, not its tax rate. The FY2026-27 mill rate of 10.12 is the lowest in Connecticut. The surprise for buyers is that 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 10.12 mill rate (FY2026-27) is the lowest in Connecticut. Darien is about 15.48, New Canaan about 16.69, and Stamford about 27.17 (District A, FY2025-26). On the same assessed home, a Greenwich owner typically pays meaningfully less than owners in those towns. Neighboring towns revalue on their own schedules, so compare the actual assessed value, not just the mill rate.
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Last updated: September 2026. Mill rate 10.12 from the Greenwich BET FY2026-27 budget transmittal (grand list as of April 1, 2026). Neighbor mill rates are the most recently published FY2025-26 figures. Estimates are guidance, not tax advice. Confirm the assessed value and any sewer millage with the Town of Greenwich Assessor.