Overview

Delaware uses progressive rates from 0% to 6.6%. Understanding how Delaware’s tax system works helps you accurately predict your paycheck and plan your finances throughout the year.

2025 Tax Rates

Delaware uses a progressive income tax structure. Lower income is taxed at lower rates (starting at 0%), and higher income is taxed at higher rates (up to 6.6%). Only the income in each bracket is taxed at that bracket’s rate — not your entire income.

Standard Deduction

Delaware provides a state standard deduction of $3,250 for single filers and $6,500 for married filing jointly. This amount is subtracted from gross income before your state tax rate is applied, lowering your overall state tax burden.

Who Must File in Delaware?

Generally, any resident of Delaware who earns income above the filing threshold must file a state income tax return. The Delaware Department of Revenue sets annual filing thresholds, which roughly correspond to the standard deduction amounts.

How Delaware Tax Affects Your Paycheck

Your employer withholds Delaware state income tax from each paycheck based on your W-4 equivalent form and expected annual income. On a $75,000 annual salary, a single filer in Delaware can expect to pay approximately $2,013–$4,736 in state income taxes annually.

Tips to Reduce Your Delaware State Tax Bill

  • Contribute to a pre-tax 401(k) — reduces both your federal and state taxable income
  • Maximize HSA and FSA contributions if available through your employer
  • Claim all applicable deductions — Delaware may allow deductions beyond the standard deduction
  • Review your withholding each year to avoid underpayment penalties

Filing Deadlines

Delaware’s state income tax return is generally due on April 15, aligning with the federal deadline. An automatic extension to October 15 is usually available, but any tax owed must still be paid by April 15 to avoid penalties.

How Delaware Compares to Neighboring States

Delaware borders Maryland, Pennsylvania, New Jersey. Compared to its neighbors, Delaware’s top rate of 6.6% places it in the middle of the pack for states in the region.

Use Our Calculator

Want to see your exact Delaware take-home pay? Use our free US Paycheck Calculator — select Delaware from the state dropdown and enter your salary, filing status, and dependents for a complete tax breakdown.

Tax rates based on 2025 data. Laws change frequently — verify with the Delaware Department of Revenue or a tax professional.