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Energy Efficient Home Credit (45L) in Connecticut 2026

Calculate your energy efficient home credit (45l) 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 +
$5,000
Est. Total Savings
$5,000
Max Deduction
Tax Credit
Deduction Type
27.5%
Combined Tax Rate

Energy Efficient Home Credit (45L) Savings Calculator for Connecticut

$
$

Federal Savings

$5,000

22% bracket

Connecticut State

$0

5.5% rate

Total Savings

$5,000

27.5% combined

Tax credits reduce your tax bill dollar-for-dollar, regardless of your tax bracket.

Savings by Tax Bracket in Connecticut

10%
$5,000
12%
$5,000
22%
$5,000
24%
$5,000
32%
$5,000
35%
$5,000
37%
$5,000

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

Eligibility Requirements

Builders or developers of new energy-efficient homes

  • 1$2,500 for ENERGY STAR certified homes
  • 2$5,000 for DOE Zero Energy Ready homes
  • 3Must meet prevailing wage requirements for full credit

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

  • !Not obtaining required certifications before claiming
  • !Missing prevailing wage requirements
  • !Failing to meet the 50% energy savings threshold
  • !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

Form 8908Form 3800

File these forms with your federal tax return to claim the energy efficient home credit (45l). Connecticut may require additional state-specific forms.

Other Tax Deductions in Connecticut

Mortgage Interest Deduction

Housing

~$4,375
est. savings

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

Energy Efficient Home Credit (45L) in Neighboring States

New York

10.9% top rate (progressive)

~$2,500
-2,500 vs Connecticut

Massachusetts

5% top rate (flat)

~$2,500
-2,500 vs Connecticut

Rhode Island

5.99% top rate (progressive)

~$2,500
-2,500 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 Energy Efficient Home Credit (45L) Guide

Frequently Asked Questions

How much can I save with the Energy Efficient Home Credit (45L) in Connecticut?

In Connecticut, the energy efficient home credit (45l) can save you an estimated $5,000 per year on a $5,000 deduction. This includes $5,000 in federal tax savings and $0 in Connecticut state tax savings at the 5.5% marginal rate. The national average savings is $2,500/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 Energy Efficient Home Credit (45L) in Connecticut?

Builders or developers of new energy-efficient homes. The eligibility requirements are the same whether you live in Connecticut or another state, as this is a federal tax credit. 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 Energy Efficient Home Credit (45L) in Connecticut?

To claim the energy efficient home credit (45l), you need to file Form 8908 and Form 3800 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 Energy Efficient Home Credit (45L) 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

Mortgage Interest Deduction in Connecticut

Avg savings: $3,500/year

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