Delaware Income
Tax Rates & Rules

A Delaware income tax calculator applies the state's graduated rates to Delaware taxable income, not directly to every dollar of gross wages. For 2026, Delaware retains seven tax bands, beginning with 0 percent on the first $2,000 of taxable income and reaching 6.6 percent on taxable income over $60,000. Residents, part-year residents and nonresidents can have different filing and sourcing rules, so the correct calculation starts with residency status and Delaware taxable income.

Delaware Income Tax Rates and Brackets for 2026

Delaware uses a graduated individual income tax structure with marginal rates from 0 percent to 6.6 percent.

These are marginal rates. A taxpayer with $75,000 of Delaware taxable income does not pay 6.6 percent on the full $75,000. Using the state formula, the tax before credits is $2,943.50 plus 6.6 percent of the $15,000 above $60,000, or $3,933.50 before rounding and any applicable credits.

How Is Delaware Taxable Income Calculated?

Delaware taxable income generally starts with federal adjusted gross income then applies Delaware additions, subtractions and deductions before the state tax table or rate schedule is used.

• Complete the federal income tax return first and determine federal adjusted gross income.
• Apply Delaware additions or subtractions required by state law.
• Subtract the Delaware standard deduction or allowable itemized deductions.
• Apply any additional deduction available because of age or blindness when the taxpayer qualifies and does not itemize.
• Use the Delaware tax table or rate schedule on the resulting taxable income.
• Subtract eligible credits then compare the final liability with withholding and estimated payments.

Current Delaware guidance uses a standard deduction of $3,250 for single taxpayers and married taxpayers filing separately, or $6,500 for married taxpayers filing jointly. Current return instructions also provide an additional $2,500 standard deduction for a taxpayer or spouse who is age 65 or older or blind when the return does not itemize deductions. Final 2026 return instructions should still be checked when the state publishes the tax-year 2026 package.

Delaware Residents, Part-Year Residents and Nonresidents

A full-year Delaware resident can be taxed on income from all sources, while nonresidents are generally taxed on Delaware-source income and part-year residents must account for income based on the periods of residence and nonresidence.

Current Delaware instructions define a resident as an individual domiciled in Delaware for part of the taxable year or an individual who maintains a place of abode in Delaware and spends more than 183 days of the year in the state, subject to specific exceptions. Part-year residents can have both resident-period income and Delaware-source income from the nonresident period.

A nonresident with Delaware-source gross income generally files a Delaware nonresident return. Delaware does not have wage-tax reciprocity agreements with other states, so a resident of another state who physically works in Delaware can have Delaware tax liability even if the home state also taxes the income. The home state may provide a credit for tax paid to Delaware depending on its rules.

Does Delaware Tax Remote Workers?

Delaware generally looks to residency and where services are performed, so remote-work tax treatment can differ between a Delaware resident and a nonresident who works from another state.

The Delaware employer guide states that compensation paid to a nonresident is subject to Delaware withholding to the extent it is for personal services performed in Delaware. Delaware's FAQ also explains that a nonresident who did not live or work in Delaware during the year can file PIT-NON to recover Delaware tax that was withheld in error, with employer certification. That makes physical work location important for many nonresident remote employees.

Delaware residents can still owe Delaware income tax when they work outside the state. If another state taxes the same income, Delaware can allow a credit for qualifying income taxes imposed by that state under the resident-return rules.

Delaware Retirement Income Has Important State Exclusions

Delaware provides state-specific retirement exclusions that can reduce taxable income for qualifying taxpayers.

Taxpayers age 60 or older can exclude up to $12,500 per person of pension and eligible retirement income, limited to the amount of qualifying income. Eligible retirement income can include pensions, certain retirement-plan distributions, interest, dividends, capital gains and net rental income. Taxpayers under age 60 who receive pension income can qualify for an exclusion of up to $2,000.

Social Security and Railroad Retirement benefits are excluded from Delaware taxable income. Delaware municipal bond interest is generally exempt for Delaware residents while interest from municipal obligations issued by other states is taxable to Delaware residents under current state guidance.

Delaware Withholding Is an Advance Payment, Not the Final Tax

Delaware income tax withheld from wages is a prepayment toward annual state tax liability and can differ from the tax ultimately shown on the return.

Employees who want to estimate how Delaware withholding affects a specific pay period can use the Delaware paycheck calculator. The annual income tax page should focus on taxable income, rates, residency and filing rather than treating paycheck withholding as the final annual liability.

The withholding method annualizes wages, accounts for the state standard deduction and claimed allowances then converts the annual estimate back to the payroll period. Taxpayers with other income, itemized deductions, credits or multistate income can therefore have a final tax result that differs from payroll withholding.

Who May Need Delaware Estimated Tax Payments in 2026?

A Delaware resident or a person with Delaware-source income may need quarterly estimated payments when expected tax after withholding and credits is high enough.

Current Delaware instructions say estimated payments are generally not required when the expected balance after withholding and credits is less than $800, when withholding and credits cover at least 90 percent of current-year tax or when a prior-year safe-harbor rule is met. Higher-income taxpayers can face a 110 percent prior-year safe-harbor threshold.

For 2026, the published installment dates are April 30, June 15 and September 15, 2026 plus January 15, 2027. Delaware provides Form PIT-EST for 2026 estimated payments.

Which Delaware Income Tax Form Should You File?

Delaware uses PIT-RES for full-year resident returns and PIT-NON for nonresident returns, while part-year residents should follow the state instructions to determine the appropriate filing method.

As of August 24, 2026, Delaware's current forms page publishes the 2025 resident and nonresident return package plus 2026 estimated-tax vouchers. The final tax-year 2026 individual return instructions are not yet published because the 2026 year has not ended. Taxpayers filing the 2026 return in 2027 should use the final forms and due dates published by the Delaware Division of Revenue at that time.

Delaware calendar-year individual returns are generally due by April 30 of the following year. The exact 2027 due date for a tax-year 2026 return should be verified against the final 2026 instructions once issued.

Use Payroll Records to Support the Tax Calculation

Income tax calculations should be reconciled with official wage and tax documents rather than relying only on a year-end pay stub.

Delaware's resident instructions specifically tell taxpayers to use their W-2s, 1099-Rs and other official withholding information when filing and warn that year-end pay-stub information may not match what an employer reports to the state. A pay stub remains useful for payroll recordkeeping, but it does not replace the official W-2 or 1099 used for tax filing.

After payroll is finalized, the Delaware pay stub generator can organize genuine pay-period earnings and deductions. For broader lawful payroll documentation, the paystub maker can be used with verified payroll data.

Tax Information and Responsible Use

This page is educational and is designed to explain state income tax concepts for 2026. It is not a substitute for an official tax return, current state instructions or individualized tax advice.

Tax liability can change because of filing status, deductions, credits, residency, source income, business activity and later legislative or administrative updates. Verify final tax-year forms and instructions with the state tax agency before filing. Online PayStub is intended for lawful payroll, business and recordkeeping purposes and should only be used with truthful payroll information.