Delaware Income Tax Calculator

How to Use This Delaware Income Tax Calculator

This Delaware income tax calculator estimates your annual state and federal tax liability for 2025 and 2026. Enter your gross wages, filing status, and any pre-tax deductions above. If you work in Wilmington, select the Wilmington local option to include the 1.25% city wage tax in your results.

This tool focuses on your annual tax picture — total taxes owed for the year, effective rates, and net income. For a per-paycheck breakdown, use the Delaware paycheck calculator.

How Delaware State Income Tax Works

Delaware uses a progressive bracket system with seven brackets ranging from 0% to 6.6% in 2026. Unlike some states, Delaware uses the same bracket schedule for all filing statuses — only the standard deduction differs between single and married filers.

Key features of the Delaware income tax system:

• Standard deduction — $3,250 for single filers; $6,500 for married filing jointly. This is much smaller than the federal standard deduction ($16,100 single in 2026), so Delaware taxes more of your income at the state level.
• Personal exemption credit — $110 per exemption applied directly against calculated tax. Single filers get 1 credit ($110); MFJ filers get 2 credits ($220). Plus $110 per qualifying dependent.
• Retirement income exclusion — Delaware residents age 60 and older can exclude up to $12,500 of pension, IRA, or eligible retirement income from state tax. Under 60: up to $2,000 exclusion.
• No Social Security tax — Delaware does not tax Social Security benefits.

Wilmington City Wage Tax — Impact on Annual Tax Liability

Wilmington's 1.25% city wage tax applies to earned income for both residents and non-residents working within city limits. On an annual basis:

• $50,000 gross wages: $625/year in Wilmington wage tax.
• $75,000 gross wages: $938/year.
• $100,000 gross wages: $1,250/year.
• $150,000 gross wages: $1,875/year.

The Wilmington wage tax is withheld from your paycheck by your employer. Delaware allows a credit on the state return for local taxes paid — but the credit is limited and does not fully offset state tax, so residents and in-city workers pay both taxes.

Non-residents who work in Wilmington and live in a state with its own income tax may also claim a credit on their home state return for Delaware taxes paid. Consult a CPA if you commute across state lines.

Federal Income Tax for Delaware Residents

Federal income tax uses a progressive bracket system that applies to all US residents regardless of state. For a single Delaware filer in 2026:

• 10% on the first $12,400 of taxable income
• 12% on $12,400–$50,400
• 22% on $50,400–$105,700
• 24% on $105,700–$201,775
• 32% on $201,775–$256,225
• 35% on $256,225–$640,600
• 37% above $640,600

Taxable income is gross income minus the federal standard deduction ($16,100 for single filers in 2026) or itemized deductions. The Delaware standard deduction is separate and smaller — your state and federal taxable incomes will differ.

FICA Taxes — Social Security and Medicare

FICA taxes apply to every Delaware paycheck regardless of state of residence.

• Social Security: 6.2% on wages up to $176,100 (2025) or $184,500 (2026). No further withholding once you hit the wage base.
• Medicare: 1.45% on all wages with no cap.
• Additional Medicare: 0.9% on wages above $200,000 (single) or $250,000 (married jointly) — employee only, no employer match.

How to Reduce Your Delaware Annual Tax Liability

Pre-tax payroll deductions save both federal and Delaware state income tax simultaneously.

• Max your 401(k) — $23,500 in 2026 ($31,000 age 50+). A $20,000 contribution for a Delaware resident in the 22% federal / 5.55% state bracket saves roughly $5,510 in total annual taxes (federal + state combined).
• Contribute to an HSA — $4,300 individual / $8,550 family in 2026. Delaware honors HSA deductions for state income tax purposes.
• Use Dependent Care FSA — up to $5,000 per household in pre-tax dollars for childcare or elder care, reducing both federal and DE state taxable income.
• Maximize the retirement exclusion — if you are 60 or older, ensure all eligible pension and retirement distributions are claimed for the up-to-$12,500 Delaware exclusion.
• Adjust your withholding — if your withholding does not match your expected tax liability, update your withholding certificate. Compare your expected tax with this income tax calculator.

Tax Disclaimer

This calculator provides estimates for informational purposes only. It is not tax advice. Delaware state tax brackets, Wilmington local rates, federal rules, standard deductions, and credit amounts can change annually. Results reflect 2025 and 2026 tax-year parameters based on Delaware Division of Revenue publications and IRS guidance current at time of publication. Consult a qualified Delaware-licensed CPA or tax professional for guidance on your specific situation.