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Mortgage Interest Deduction in Delaware 2026

Calculate your mortgage interest deduction tax savings in Delaware. With Delaware's 6.6% top state tax rate, your combined savings are higher.

Delaware Tax Overview

State Income Tax
6.6%
progressive
Sales Tax
None
avg combined: 0%
Property Tax Rate
0.53%
Median Income
$72,724

No sales tax. Moderate income tax. Low property taxes (0.53%).

Delaware Income Tax Brackets (Single)

0%
$0 - $2,000
2.2%
$2,000 - $5,000
3.9%
$5,000 - $10,000
4.8%
$10,000 - $20,000
5.2%
$20,000 - $25,000
5.55%
$25,000 - $60,000
6.6%
$60,000 +
Your bracket
$1,430
Est. Total Savings
$750,000
Max Deduction
Itemized
Deduction Type
28.6%
Combined Tax Rate

Mortgage Interest Deduction Savings Calculator for Delaware

$
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Federal Savings

$1,100

22% bracket

Delaware State

$330

6.6% rate

Total Savings

$1,430

28.6% combined

At a 28.6% combined tax rate in Delaware, every $1,000 in deductions saves you $286 in taxes.

Savings by Tax Bracket in Delaware

10%
$830
12%
$930
22%
$1,430
24%
$1,530
32%
$1,930
35%
$2,080
37%
$2,180

Includes 6.6% Delaware 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

Delaware residents should verify that this deduction is also recognized on their state tax return for additional savings of up to 6.6%.

Common Mistakes to Avoid

  • !Forgetting PMI premiums
  • !Not tracking home equity loan interest
  • !Forgetting to claim the deduction on your Delaware state return (missing up to 6.6% additional savings)

Delaware Filing Tips

Take advantage of zero sales tax for major purchases. The state standard deduction is low ($3,250), so itemizing may help. Check reciprocity agreements with neighboring states.

Required Tax Forms

Schedule AForm 1098

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

Other Tax Deductions in Delaware

Property Tax Deduction

Housing

~$2,860
est. savings

Home Office Deduction

Housing

~$1,560
est. savings

Home Energy Tax Credit

Housing

~$1,800
est. savings

Residential Solar Tax Credit

Housing

~$7,500
est. savings

Military Moving Expenses

Housing

~$5,200
est. savings

PMI Premium Deduction

Housing

~$1,430
est. savings

Mortgage Points Deduction

Housing

~$2,600
est. savings

Casualty & Theft Loss Deduction

Housing

~$6,500
est. savings

Mortgage Interest Deduction in Neighboring States

Maryland

5.75% top rate (progressive)

~$4,415
+2,985 vs Delaware

Pennsylvania

3.07% top rate (flat)

~$3,988
+2,558 vs Delaware

New Jersey

10.75% top rate (progressive)

~$5,210
+3,780 vs Delaware

Tax Calculators for Delaware Cities

Wilmington

Calculate Your Full Tax Savings in Delaware

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

Income Tax CalculatorDelaware Income TaxFull Mortgage Interest Deduction Guide

Frequently Asked Questions

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

In Delaware, the mortgage interest deduction can save you an estimated $1,430 per year on a $5,000 deduction. This includes $1,100 in federal tax savings and $330 in Delaware state tax savings at the 6.6% marginal rate. The national average savings is $3,500/year.

What is the Delaware state income tax rate?

Delaware has a progressive income tax system with a top rate of 6.6%. No sales tax. Moderate income tax. Low property taxes (0.53%).

Who qualifies for the Mortgage Interest Deduction in Delaware?

Homeowners with mortgage on primary or secondary residence. The eligibility requirements are the same whether you live in Delaware or another state, as this is a federal tax deduction. However, your total savings will vary based on Delaware's 6.6% top state tax rate.

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

To claim the mortgage interest deduction, you need to file Schedule A and Form 1098 with your federal return. Delaware residents should also check if the state allows this deduction on their state return for additional savings of up to 6.6%. Filing status affects your deduction limits and tax bracket.

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

Yes, Delaware residents benefit more because the state's 6.6% 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 28.6% means more savings per dollar deducted.

What is the standard deduction in Delaware for 2026?

Delaware's standard deduction is $3,250 for single filers and $6,500 for married filing jointly. Take advantage of zero sales tax for major purchases. The state standard deduction is low ($3,250), so itemizing may help. Check reciprocity agreements with neighboring states.

Related Calculators

Property Tax Deduction in Delaware

Avg savings: $2,200/year

Home Office Deduction in Delaware

Avg savings: $1,200/year

Home Energy Tax Credit in Delaware

Avg savings: $1,800/year

Residential Solar Tax Credit in Delaware

Avg savings: $7,500/year

Military Moving Expenses in Delaware

Avg savings: $4,000/year

PMI Premium Deduction in Delaware

Avg savings: $1,100/year