Southington mill rate: what it is and how it affects your tax bill

Last updated 2026-07-09

What is Southington's mill rate right now?

Southington's mill rate is 32.46 mills for the fiscal year running July 1, 2024 through June 30, 2025. ^[1] The Board of Finance adopts the rate each spring after the Town Council signs off on the budget, and it takes effect on the July 1 grand list date.

One mill equals $1 of tax per $1,000 of assessed value. So 32.46 mills means $32.46 for every $1,000 of assessed value on your property. That is the cleanest way to think about it before you run any numbers.

Southington uses a single town-wide mill rate for real property. There is no separate fire district overlay hitting every parcel, though some Connecticut towns do split rates by district. The rate covers the municipal budget, the schools, and the town's share of services that would be county functions elsewhere. Connecticut abolished county governments in 1960, so there is no county tax layer. ^[2]

How has Southington's mill rate changed over recent years?

Southington's mill rate has barely moved in five years. It has hovered near 32 mills the whole time. Connecticut rates track budget pressure and reassessment cycles. When a revaluation inflates or compresses assessed values across the grand list, the rate usually moves the opposite direction to hold total revenue roughly stable. That is revenue neutrality in practice, and no law forces a town to keep the rate flat.

Here is Southington's recent mill rate history, drawn from town budget documents and grand list data ^[1]:

Fiscal Year	Mill Rate (Real Property)
2019-20	31.99
2020-21	32.31
2021-22	32.31
2022-23	32.46
2023-24	32.46
2024-25	32.46

Minor rounding differences sometimes show up between the town's budget presentation and the final certified rate. Verify against the town's official grand list abstract or tax collector records before you rely on a number to the hundredth. ^[1]

The stability you see reflects a grand list that has grown modestly, absorbing budget increases without big rate hikes. Southington's October 2022 revaluation reset assessed values for the 2022 grand list, but it did not swing the rate hard because the rate had already been adjusted to compensate.

How do you calculate your Southington property tax bill?

The math has three steps, and you can do all of it with the assessment notice in your hand.

Step 1: Find your assessed value. Connecticut law defines assessed value as 70% of the market value the assessor sets. ^[3] It is printed on your assessment card and listed in the town's online property database.

Step 2: Turn the mill rate into a decimal. Divide by 1,000. At 32.46 mills, that is 0.03246.

Step 3: Multiply. A home assessed at $175,000 owes $175,000 x 0.03246, which is $5,680.50 a year before any exemptions.

Here is a quick reference at the 2024-25 rate of 32.46 mills:

Assessed Value	Annual Tax
$100,000	$3,246
$150,000	$4,869
$175,000	$5,681
$200,000	$6,492
$250,000	$8,115
$300,000	$9,738

These assume no exemptions. If you qualify for the veterans' exemption or the elderly/totally disabled tax relief credit, your taxable value drops and your bill drops with it. ^[4]

Southington bills real property in two installments. The first is due July 1 (grace period through August 1), the second due January 1 (grace period through February 1). ^[5] Late payments run 1.5% interest per month, with a $2.00 minimum charge, under Connecticut General Statutes Section 12-145. ^[6]

What is the 70% assessment ratio and how does it connect to the mill rate?

Connecticut sets the assessment ratio at 70% of market value for all real property, and it is written into state statute. ^[3] Every town uses it. Southington's assessor is not picking 70% out of the air.

The ratio and the mill rate work as a pair. If assessed values across town rise 10% in a revaluation, the town can drop the rate about 9% and pull in the same total revenue. If it holds the rate flat instead, it collects 10% more. Homeowners feel blindsided when a revaluation raises their assessment and the town cuts the mill rate, but not quite enough to offset the full increase. That is legal, and it happens often.

Here is the part that matters for your wallet. If your neighbor's market value is pegged accurately at 70% and yours is inflated, you pay more than your fair share no matter what the mill rate does. The rate is identical for everyone in town. Individual errors live in the assessment. And the assessment is the only piece you can actually challenge.

What exemptions reduce your Southington property tax?

Connecticut runs several programs that cut the assessed value you pay tax on, and Southington administers each of them through the assessor's office.

The elderly/totally disabled tax relief program (Connecticut General Statutes Section 12-170aa) gives qualifying seniors and disabled residents a credit against the bill. Income limits and benefit amounts change periodically; for the 2024-25 cycle the state ceiling is roughly $43,800 for a married couple, subject to annual adjustment. ^[4] You apply through Southington's assessor by May 15.

The veterans' exemption under CGS Section 12-81(19) knocks $1,500 off assessed value for eligible veterans, with larger exemptions for wartime service and disability ratings. ^[6]

Connecticut has no Homestead Exemption. It does not exist here the way it does in Florida or Texas, and there is no blanket owner-occupant break. For qualifying homeowners, the elderly credit is the closest thing to it.

Manufactured housing gets treated differently depending on the land. Southington, like every Connecticut town, assesses a manufactured home as real property when it sits on owned land and as personal property when it sits on leased land.

Most exemption applications in Southington are due by November 1 of the assessment year (the grand list year ending October 1). The elderly relief deadline is the outlier at May 15. Miss a deadline and you usually wait a full year to reapply.

When did Southington last do a revaluation, and what changed?

Southington's last full revaluation took effect October 1, 2022. Connecticut requires a revaluation of all real property at least once every five years under CGS Section 12-62. ^[7] The 2022 list was the first to reflect that reset. ^[1]

A revaluation moves every parcel's market value estimate to reflect current sales. In the post-pandemic market, plenty of Connecticut towns watched assessed values jump 30 to 50 percent in their 2021 and 2022 revaluations because prices had climbed sharply since the prior cycle. Southington saw that pressure too.

Towns can phase in large assessment increases over as many as five years under CGS Section 12-62c. Whether Southington used that option is worth confirming with the assessor's office directly, because phase-in status changes your current assessed value and therefore your bill.

The appeal window after a revaluation is short. The deadline to challenge the October 1, 2022 grand list was February 20, 2023. Every later grand list year follows the same February schedule, so mark it.

How do you appeal your Southington assessment if it's too high?

The Southington appeal follows Connecticut's standard statutory framework. Four steps, in order.

First, get your property record card from the assessor. It shows the breakdown of land value, building value, square footage, bedroom count, condition grade, and every other factor behind your number. Errors in those fields are common after a mass appraisal, and they are the first thing to check. ^[8]

Second, pull comparable sales. The valuation date in Connecticut is October 1 of the grand list year. For the 2024 grand list (assessed October 1, 2024), you want arm's-length sales of similar Southington homes from roughly April through October 2024. The town assessor database, deed records at the town clerk, and the Connecticut GIS resources all carry this for free.

Third, file with the Board of Assessment Appeals. The deadline for the 2024 grand list is February 20, 2025. ^[9] Miss it and you lose your statutory right to appeal that year. The form is at Town Hall and on the town website. Residential appeals cost nothing to file.

Fourth, show up for your hearing. The Board schedules hearings in March and must finish by March 31 under CGS Section 12-111. ^[9] Bring your comps, your record card with errors marked, and photos if condition is the issue. Be direct. Board members are volunteers, and a tight five-minute presentation beats a rambling twenty-minute complaint.

If the Board denies you or trims too little, you have two more paths: appeal to Superior Court under CGS Section 12-117a, or use the small claims property tax track for lower-value assessments (confirm the current dollar threshold in statute). ^[9]

Any homeowner can do this for a residential property. You do not need a contingency firm skimming 30 to 40 percent of your first-year savings. The TaxFightBack appeal kit walks you through the comparable sales work and hearing prep using the same framework the pros use, and you keep 100% of whatever reduction you win.

The machinery differs by state. Compare Connecticut's Board of Assessment Appeals model with a Maricopa County property tax appeal or a San Diego property tax appeal and you will see very different procedures. The evidence logic, comparable sales, is the same everywhere.

How does Southington's mill rate compare to other Connecticut towns?

Connecticut mill rates swing wildly by town, mostly because each municipality funds its own schools and carries its own grand list mix. Towns with big commercial bases can run low residential rates. Poorer towns with small grand lists and heavy service demands run much higher ones.

Here is the neighborhood picture ^[2]:

Town	Approximate 2023-24 Mill Rate
Southington	32.46
Bristol	38.35
Meriden	40.86
New Britain	49.50
Simsbury	34.00
Cheshire	30.45
Plainville	34.10
Wolcott	35.05

These neighbor rates come from Connecticut's annual mill rate compilation published by the Office of Policy and Management. Confirm any single town's current rate with that town directly. ^[2]

Southington sits in the moderate range for central Connecticut. It runs below distressed urban centers like Meriden and New Britain and roughly in line with comparable suburbs. Keep the takeaway straight when you decide whether to appeal: the mill rate is not your target, your assessed value is. A high rate only amplifies the damage from an inaccurate assessment, which makes getting the value right more important, not less.

What does the grand list tell you about how Southington sets its rate?

The grand list is the town's full inventory of taxable property, certified each January 31 for the October 1 assessment date. ^[7] Divide the net taxable total on that list into the approved budget and you get the mill rate.

Southington's 2022 grand list, the first to reflect the full revaluation, carried a net total assessed value of roughly $3.56 billion. The exact figure lives in the town's grand list abstract filed with the state; request it from the assessor or Connecticut OPM. ^[2] The formula is simple: budgeted tax revenue divided by (net grand list / 1,000).

Understanding the list opens a second appeal angle most homeowners miss. If your neighborhood's assessed values collectively rose much faster than the town average, your slice of the total tax burden shifted relative to the rest of town. That is an equity argument, and Connecticut law lets you raise it before the Board of Assessment Appeals.

You can also test your assessment against recent local sales. Work out the implied market value from your assessed value (divide by 0.70) and compare it to what similar homes actually sold for near the October 1 date. If your implied value runs 15 percent above those sales, you have a real case.

What personal property and motor vehicle taxes also use the Southington mill rate?

The mill rate hits three classes of taxable property in Southington: real property, business personal property, and motor vehicles.

Motor vehicles are assessed at 70% of the prior October 1 Clean Trade-In value from the NADA guide. ^[6] Connecticut capped the motor vehicle rate statewide, and the cap has been adjusted by the legislature more than once (it started at 29 mills for the 2021 grand list year before later changes). The cap interacts with local rates in specific ways, so check the current OPM guidance for the exact figure in effect for Southington. ^[2]

Business personal property covers computers, furniture, machinery, and equipment, assessed at depreciated value using the Connecticut assessors' depreciation schedule. The same 32.46 mill rate applies.

Own a business and think the personal property assessment is too high? The same Board of Assessment Appeals process and February deadline apply. These appeals often win when the assessor used the wrong depreciation schedule or left retired assets on the list.

Other states run this entirely differently. A St. Louis County personal property tax bill sits in a separate system altogether, but the principle of challenging bad inventory or bad depreciation carries over.

How can you lower your Southington property tax bill without moving?

There are four real levers, and almost nobody pulls the last one.

Apply for every exemption you qualify for. If you are 65 or older, or totally disabled, apply for the elderly/disabled tax relief by May 15. If you are a veteran, confirm the assessor has your exemption on file. None of these are automatic. You apply, and sometimes you re-certify.

Read your property record card every year. Mass appraisal breeds errors: wrong square footage, a finished basement coded unfinished (or the reverse), a bathroom count that does not match reality, a condition grade that ignores deferred maintenance. Each one inflates your value. The fix is usually a short written correction request to the assessor.

File an appeal when the numbers back you. Pull three to five comparable sales, divide each assessed value by its sale price (the ratio should sit near 0.70), and compare to yours. If your ratio runs well above 0.70, you are overpaying and you have the evidence to prove it.

Watch for revaluation notices. Southington's next revaluation is due by October 1, 2027 at the latest under the five-year cycle. A new value is a fresh chance to challenge. That notice is the moment most homeowners first realize they can appeal, and it is exactly the right moment to move.

The lever people skip is the appeal. Contingency firms advertise hard because residential reductions hold real money, but the process is open to any homeowner who can read a spreadsheet and stand up for a twenty-minute hearing. The TaxFightBack appeal kit hands you the comparable sales template and a hearing script built for Connecticut's Board of Assessment Appeals, so you never owe anyone a cut of your savings.

Frequently asked questions

What is Southington CT's mill rate for 2024-25?

Southington's mill rate for the 2024-25 fiscal year (July 1, 2024 through June 30, 2025) is 32.46 mills. One mill equals $1 of tax per $1,000 of assessed value. To find your bill, multiply your assessed value by 0.03246. The Board of Finance sets the rate each spring after the Town Council approves the budget.

How is Southington's mill rate set each year?

The Town Council approves a budget each spring, and the Board of Finance divides the amount to be raised through property taxes by the net taxable grand list (divided by 1,000) to get the mill rate. A growing grand list can hold the rate steady or push it down even as spending rises. The rate is certified before July 1 and applies to all July 1 bills.

When are Southington property tax bills due?

Real property taxes in Southington are billed in two installments. The first is due July 1, with a grace period through August 1. The second is due January 1, with a grace period through February 1. Interest on late payments is 1.5% per month with a $2 minimum, under Connecticut General Statutes Section 12-145.

What is the deadline to appeal my Southington assessment?

The deadline to file with the Southington Board of Assessment Appeals is February 20 of the year following the October 1 grand list date. For the 2024 grand list (assessed October 1, 2024), the deadline is February 20, 2025. Miss it and you forfeit your Board hearing for that year. Forms are available at Town Hall and on the town website.

Why did my Southington property tax bill go up if the mill rate stayed the same?

If the mill rate did not change, a higher bill means your assessed value went up. This usually happens after a revaluation. Southington completed a full revaluation effective October 1, 2022. If your market value estimate rose faster than your neighbors', your share of the total tax burden increased. You address that by challenging the assessment, not the mill rate.

What is Southington's assessment ratio?

Connecticut sets a uniform assessment ratio of 70% of market value for all real property under state statute. Southington follows this law. If the assessor estimates your home's market value at $300,000, your assessed value is $210,000. The mill rate then applies to the $210,000, not the $300,000 market estimate.

Does Southington offer a senior citizen property tax exemption?

Yes. Connecticut's elderly/totally disabled tax relief program (CGS Section 12-170aa) provides a credit against the property tax bill for qualifying seniors and disabled residents. The application deadline through Southington's assessor is May 15 each year. Income limits apply; for 2024-25 the ceiling is roughly $43,800 for married couples, subject to annual state adjustment.

How do I find my Southington assessed value?

Southington's assessor keeps an online property database on the town website, searchable by address or parcel ID. You can also visit the assessor's office at Southington Town Hall, 75 Main Street, or call the office. Your assessment notice, mailed after the October 1 grand list date, also states your assessed value.

Can I appeal my motor vehicle tax assessment in Southington?

Yes. Motor vehicles are assessed at 70% of NADA Clean Trade-In value as of October 1. If the value used is wrong, say your vehicle had significant damage or high mileage the standard guide ignores, you can appeal to the Board of Assessment Appeals by the February 20 deadline using the same process as real property.

How often does Southington do a revaluation?

Connecticut law requires towns to revalue all real property at least every five years under CGS Section 12-62. Southington's most recent revaluation took effect October 1, 2022. The next required one falls no later than October 1, 2027, though the town can conduct one sooner if market conditions call for it.

Is Southington's mill rate high compared to other Connecticut towns?

Southington's 32.46 mill rate is moderate for central Connecticut. It runs below urban centers like Meriden (around 40.86 mills) and New Britain (around 49.50 mills), and roughly in line with suburbs like Plainville and Wolcott. Wealthy shoreline and Fairfield County towns often run 10 to 15 mills lower thanks to larger grand lists and higher home values.

What happens after the Board of Assessment Appeals denies my Southington appeal?

You can appeal to Connecticut Superior Court under CGS Section 12-117a. You must file within two months of the Board's decision. Superior Court appeals usually require a lawyer and a formal appraisal, which makes them cost-effective mainly for higher-value properties. For many homeowners, the simpler move is stronger comparable sales evidence and a re-file in the next cycle.

Do I need a lawyer or appraisal to appeal my Southington assessment?

No. The Board of Assessment Appeals is built for homeowners without professional help. You need three to five comparable sales from near the October 1 valuation date, your property record card, and a clear explanation of how the evidence supports a lower value. A formal appraisal strengthens a case but costs roughly $400 to $700 and is optional at the Board level.

What is the personal property mill rate in Southington?

Business personal property in Southington is taxed at the same 32.46 mill rate as real property for 2024-25. Businesses file a personal property declaration with the assessor by November 1 each year. The assessor applies a depreciation schedule to reported cost data to reach an assessed value, and the standard mill rate then applies.

Sources

1. Town of Southington, CT (official municipal website, assessor and budget documents): Southington mill rate of 32.46 for fiscal year 2024-25 and recent mill rate history
2. Connecticut Office of Policy and Management (annual mill rate compilation for Connecticut towns): Statewide mill rate compilation for Connecticut towns including Southington and neighboring municipalities; motor vehicle mill rate cap information
3. Connecticut Office of Policy and Management (assessment of property, CGS Section 12-62a, 70% ratio): Connecticut law sets the assessment ratio at 70% of market value for all real property
4. Connecticut Office of Policy and Management (Elderly and Totally Disabled Homeowners Tax Relief Program, CGS Section 12-170aa): Income limits and program details for Connecticut elderly/totally disabled property tax relief under CGS Section 12-170aa
5. Town of Southington, CT (Tax Collector, billing and grace period information): Southington bills real property taxes in two installments due July 1 and January 1 with grace periods
6. Connecticut Office of Policy and Management (property tax assessment guidance, CGS Chapter 203): Veterans' exemption amounts under CGS Section 12-81(19); motor vehicle assessment at 70% of NADA value; interest rate on late taxes under CGS Section 12-145
7. Connecticut Office of Policy and Management (revaluation requirements, CGS Section 12-62): Connecticut requires towns to conduct a revaluation at least every five years; grand list certified annually by January 31
8. Connecticut Office of Policy and Management (Board of Assessment Appeals guidance): Property record card review and appeal process for Connecticut Board of Assessment Appeals
9. Connecticut Office of Policy and Management (appeal procedures, CGS Sections 12-111 and 12-117a): February 20 appeal filing deadline; Board must complete hearings by March 31; Superior Court appeal option under CGS Section 12-117a