A Fairfield house's tax figure depends on when someone wrote it down. Any number calculated before July 2026 used the old 28.39 mill rate and an assessment from the town's 2020 revaluation. Any number calculated after uses 19.19 mills and a new assessment from the October 1, 2025 grand list. Those two figures can differ a lot for the same house. Most of the time the newer one is higher.
The rate dropped 32.41%, and the town still expects most homeowners' bills to rise. On its 2025 revaluation page, the town says plainly that "most homeowners will see an increase in taxes," because home values grew faster than commercial values. Buyers comparing Fairfield with nearby towns need to understand this: the rate tells you very little until you know how much the house's assessed value moved.
The Rate Is Only Half the Fraction
A Connecticut tax bill multiplies two numbers. The first is the assessment, which Fairfield sets at 70% of the market value the town assigned during revaluation. The second is the mill rate, meaning dollars of tax per $1,000 of assessed value. The town's own example uses a $1,000,000 home at a 20-mill rate: assessed at $700,000, it owes $14,000.
Revaluation doesn't raise the total amount the town collects. Fairfield calls the process "revenue neutral." The budget sets the levy, and revaluation only changes how that levy is split among properties. The town's taxable base grew 50.93%, to $18,397,182,884, so the rate had to fall roughly in proportion. The levy itself still grew 2.03%, or $7,027,428, to $353,104,194 in the approved FY 2026–27 budget.
Put those together and you get a break-even point. Divide 28.39 by 19.19 and the answer is about 1.48. A home whose town-assessed value rose about 48% between the 2020 and 2025 revaluations owes roughly the same tax as before. A home that rose more owes more, and a home that rose less owes less.
Where the Break-Even Sits
The town estimates that residential values rose about 63.88% overall, commercial values about 16.61%, and all real estate together 57.52%. The town labels those figures estimates. The table below is illustrative math only. It takes a home the 2025 revaluation valued at $1,000,000 and works backward to what the 2020 value would have been at each growth rate.
| If the home's value rose... | Implied 2020 value | Old bill at 28.39 mills | New bill at 19.19 mills | Change |
|---|---|---|---|---|
| 16.61%, the commercial pace | about $857,600 | about $17,040 | $13,433 | about 21% lower |
| about 48%, the break-even | about $676,100 | about $13,440 | $13,433 | roughly flat |
| 63.88%, the residential average | about $610,200 | about $12,130 | $13,433 | about 10.8% higher |
The town hasn't published an average change in residential bills, and no official figure breaks results out by neighborhood or separates single-family homes from condos. The table shows how the formula behaves. It doesn't predict any specific parcel's bill. What it does show is that a house appreciating at the town's average pace lands well above break-even.
Why Homeowners Picked Up More of the Bill
The gap between residential and commercial growth matters as much as the rate cut. Fairfield estimates that residential property's share of the grand list grew from 78% to 84%, and the town calls that a "shift": homeowners now carry a larger share of the total levy. In the 2020 revaluation, commercial values kept up with residential ones. In 2025 they didn't.
Car owners come out ahead. The town expects most vehicle taxes to go down, because vehicles up to 15 years old take another 5% depreciation and then get billed at the lower rate.
The size of the jump led to a lot of challenges. The CT Post reported in May 2026 that 884 homeowners had filed appeals with the Board of Assessment Appeals. Patch reported in June that the board heard and decided 876 appeals, compared with 619 in the 2020 cycle. Assessor Ross Murray said 78% of them ended in reductions, which he called in line with past years. The average reduction was about 17%, compared with about 3% in 2020. "What makes the number large is the sheer number of appeals," Murray told the Board of Finance, according to Patch.
For a buyer, this means two houses that look alike can carry different assessments, depending on whether the current owner appealed and won a reduction.
Your Purchase Price Doesn't Set Your Tax
The tax follows the town's appraisal as of October 1, 2025. The contract price doesn't factor in. Fairfield revalues every five years. The 2025 grand list fed into bills starting in July 2026. If that five-year cycle and timing hold, the next revaluation would be the October 1, 2030 grand list, first billed in July 2031. The town hasn't published those dates. They're simply the same calendar carried forward.
In practice, the September 2026 single-family median in Fairfield was about $1.3 million, based on monthly brokerage market data. Suppose you pay $1.3 million for a house the revaluation valued at $1.2 million. Your assessment would be $840,000, and at 19.19 mills that comes to about $16,120 a year. If the bill were based on your price, it would be about $17,460. In a competitive market, the gap between the town's number and the price you paid can work in your favor for several years. The same logic runs the other way too: paying less than the town's appraisal doesn't lower the bill by itself.
So the useful number for a specific house is its 2025-cycle assessment, not the asking price. The online property record card system the town links from its revaluation page has displayed values labeled by grand list year, so check which year a card shows before you use it in a budget.
What Happens to the Bill at Closing
Fairfield bills real estate tax in four installments, and the new values change every one of them. This is the sequence laid out on the town's tax due dates and tax collector FAQ pages:
- Due dates. Real estate taxes are due quarterly on July 1, October 1, January 1 and April 1. A bill of $100 or less is due in full with the first installment.
- Grace period. An installment becomes delinquent if it isn't paid within a month. In the town's example, a July 1 installment is late if paid or postmarked after August 1. As of mid-October 2026, that means the October 1 installment has to be paid by November 1.
- Proration. When a home sells, the settlement attorney usually splits the tax for that year by the sale date. The seller covers the period they owned the home and the buyer covers the period after. The town asks to be told about the sale.
Every installment in the 2026–27 tax year is calculated on the revaluation values. A closing statement this fall prorates against the new, usually larger bill. Last year's figure won't match.
Tax Collector David Kluczwski urged the Board of Finance to be cautious about collection assumptions, given the large increases many homeowners would see on their bills, Patch reported. As of this writing, there's no published account of what the July 2026 bills actually looked like across town.
Comparing Fairfield to the Towns Next Door
Because of the break-even math, a mill rate on its own is a poor way to compare towns. These are the adopted 2026–27 rates in nearby towns:
- Westport set its rate at 13.2, down from 18.86, according to Patch. The cut came after Westport's own revaluation for the October 1, 2025 grand list, which is described in the town's 2025 Revaluation Summary.
- Trumbull adopted 37.42, up 1.73 mills or 4.85%, according to the town's June 5, 2026 announcement.
- Bridgeport adopted 27.95, Fox61 reported. The 27.75 figure that circulated in March was the mayor's proposal, not the final rate.
Fairfield and Westport both cut their rates sharply this year, and in both cases that followed a revaluation that raised assessments. Trumbull's higher rate is applied to its own assessment base. The only reliable comparison is an actual dollar bill for a specific house: assessment times rate, in each town.
A Few Questions We Hear Often
Did Fairfield phase in the revaluation increase? We couldn't find a town or news source that settles this either way. Ask the Assessor's office directly about any specific property.
Will my tax change if I renovate after buying? The town's materials describe five-year revaluations as the regular reset. For how specific improvements are handled between revaluations, check with the Assessor.
Why did the town say the percentages could change? Fairfield published the 63.88% and 16.61% figures as estimates while it was still refining its pricing model, before individual assessments went out. Each parcel's final assessment, including any change after appeal, is what its bill is based on.
This post is general information about how Fairfield's tax process works. It isn't tax, legal or financial advice, so confirm the numbers for your own property with the Assessor, your attorney or a tax professional.
If you're weighing a Fairfield house and want to know what it will cost to carry under the new assessments, or what your current home's 2025 value means for a sale, the Marion Filley Team can go through the actual figures for that property with you. Start with a home valuation and we'll put the assessment, the rate and the market side by side.
