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Mortgage Interest Deduction in Connecticut 2026

Calculate your mortgage interest deduction tax savings in Connecticut. With Connecticut's 6.99% top state tax rate, your combined savings are higher.

Connecticut Tax Overview

State Income Tax
6.99%
progressive
Sales Tax
6.35%
avg combined: 6.35%
Property Tax Rate
1.96%
Median Income
$90,213

No standard deduction. Estate tax. Very high property taxes (1.96%).

Connecticut Income Tax Brackets (Single)

3%
$0 - $10,000
5%
$10,000 - $50,000
5.5%
$50,000 - $100,000
Your bracket
6%
$100,000 - $200,000
6.5%
$200,000 - $250,000
6.9%
$250,000 - $500,000
6.99%
$500,000 +
$1,375
Est. Total Savings
$750,000
Max Deduction
Itemized
Deduction Type
27.5%
Combined Tax Rate

Mortgage Interest Deduction Savings Calculator for Connecticut

$
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Federal Savings

$1,100

22% bracket

Connecticut State

$275

5.5% rate

Total Savings

$1,375

27.5% combined

At a 27.5% combined tax rate in Connecticut, every $1,000 in deductions saves you $275 in taxes.

Savings by Tax Bracket in Connecticut

10%
$775
12%
$875
22%
$1,375
24%
$1,475
32%
$1,875
35%
$2,025
37%
$2,125

Includes 5.5% Connecticut state tax on top of federal savings.

Eligibility Requirements

Homeowners with mortgage on primary or secondary residence

  • 1Must itemize deductions
  • 2Mortgage on qualified home
  • 3Limited to $750K mortgage debt

Connecticut residents should verify that this deduction is also recognized on their state tax return for additional savings of up to 6.99%.

Common Mistakes to Avoid

  • !Forgetting PMI premiums
  • !Not tracking home equity loan interest
  • !Forgetting to claim the deduction on your Connecticut state return (missing up to 6.99% additional savings)

Connecticut Filing Tips

Personal exemption credits phase out at higher incomes. A 'recapture' tax can push effective rates above stated brackets. Consider the high property tax when evaluating total cost of living.

Required Tax Forms

Schedule AForm 1098

File these forms with your federal tax return to claim the mortgage interest deduction. Connecticut may require additional state-specific forms.

Other Tax Deductions in Connecticut

Property Tax Deduction

Housing

~$2,750
est. savings

Home Office Deduction

Housing

~$1,500
est. savings

Home Energy Tax Credit

Housing

~$1,800
est. savings

Residential Solar Tax Credit

Housing

~$7,500
est. savings

Military Moving Expenses

Housing

~$5,000
est. savings

PMI Premium Deduction

Housing

~$1,375
est. savings

Mortgage Points Deduction

Housing

~$2,500
est. savings

Casualty & Theft Loss Deduction

Housing

~$6,250
est. savings

Mortgage Interest Deduction in Neighboring States

New York

10.9% top rate (progressive)

~$5,234
+3,859 vs Connecticut

Massachusetts

5% top rate (flat)

~$4,295
+2,920 vs Connecticut

Rhode Island

5.99% top rate (progressive)

~$4,453
+3,078 vs Connecticut

Tax Calculators for Connecticut Cities

BridgeportStamfordNew HavenHartfordWaterburyNorwalkDanburyNew BritainWest HartfordGreenwich

Calculate Your Full Tax Savings in Connecticut

Use our free tax calculators to optimize your entire tax return for Connecticut.

Income Tax CalculatorConnecticut Income TaxFull Mortgage Interest Deduction Guide

Frequently Asked Questions

How much can I save with the Mortgage Interest Deduction in Connecticut?

In Connecticut, the mortgage interest deduction can save you an estimated $1,375 per year on a $5,000 deduction. This includes $1,100 in federal tax savings and $275 in Connecticut state tax savings at the 5.5% marginal rate. The national average savings is $3,500/year.

What is the Connecticut state income tax rate?

Connecticut has a progressive income tax system with a top rate of 6.99%. No standard deduction. Estate tax. Very high property taxes (1.96%).

Who qualifies for the Mortgage Interest Deduction in Connecticut?

Homeowners with mortgage on primary or secondary residence. The eligibility requirements are the same whether you live in Connecticut or another state, as this is a federal tax deduction. However, your total savings will vary based on Connecticut's 6.99% top state tax rate.

What tax forms do I need to claim the Mortgage Interest Deduction in Connecticut?

To claim the mortgage interest deduction, you need to file Schedule A and Form 1098 with your federal return. Connecticut residents should also check if the state allows this deduction on their state return for additional savings of up to 6.99%. Filing status affects your deduction limits and tax bracket.

Is the Mortgage Interest Deduction better in Connecticut than in states without income tax?

Yes, Connecticut residents benefit more because the state's 6.99% top income tax rate means the deduction reduces both your federal AND state tax liability. In states with no income tax (like Texas, Florida, or Nevada), this deduction only reduces federal taxes. Your combined rate of 27.5% means more savings per dollar deducted.

What is the standard deduction in Connecticut for 2026?

Connecticut's standard deduction is $0 for single filers and $0 for married filing jointly. Personal exemption credits phase out at higher incomes. A 'recapture' tax can push effective rates above stated brackets. Consider the high property tax when evaluating total cost of living.

Related Calculators

Property Tax Deduction in Connecticut

Avg savings: $2,200/year

Home Office Deduction in Connecticut

Avg savings: $1,200/year

Home Energy Tax Credit in Connecticut

Avg savings: $1,800/year

Residential Solar Tax Credit in Connecticut

Avg savings: $7,500/year

Military Moving Expenses in Connecticut

Avg savings: $4,000/year

PMI Premium Deduction in Connecticut

Avg savings: $1,100/year