If you live outside Delaware but earn income from a Delaware source, you must file a Delaware non-resident income tax return, and the filing requirements for non-residents apply no matter how small the amount. Under 30 Del. C. § 1161, every non-resident individual who has income from sources within Delaware has to file a state return, with no minimum dollar threshold.1Justia. Delaware Code Title 30 Chapter 11 Subchapter VIII Section 1161 – Persons Required to Make Returns of Income Delaware has no reciprocal tax agreements with any other state, so commuters from Pennsylvania, Maryland, and New Jersey all owe Delaware a return on their Delaware wages.2Division of Revenue – State of Delaware. Withholding Tax FAQs
Who Has to File
The filing obligation is triggered by any Delaware-source income. That includes wages and salaries from a Delaware job, self-employment or contract income for work performed in the state, rental income from Delaware property, gains from selling Delaware real estate, and your share of income from a Delaware partnership, S corporation, or LLC.
Even if you earned very little and owe no tax, you may still want to file to recover Delaware taxes your employer withheld. Part-year residents who moved in or out of Delaware during the year also have to file if they had taxable income while living in the state.
Non-residents file Form 200-02 NR, the Non-Resident Individual Income Tax Return. If your Delaware employer’s wages include time you were required to work outside Delaware, you attach Schedule W, which allocates wages between days physically worked in Delaware and days worked elsewhere. Schedule W divides your Delaware working days by your total working days and applies that ratio to your wages.
Delaware’s Tax Rates for Non-Residents
Delaware taxes income “derived from sources” within the state.3Justia. Delaware Code Title 30 Chapter 11 Subchapter III Section 1124 – Income Derived From Sources in Delaware For non-residents, that means Delaware wages, in-state business profits, Delaware rental income, and capital gains from Delaware real estate. Investment income like dividends and brokerage interest generally is not taxable to a non-resident unless it’s tied to a Delaware business you operate.
The state uses a graduated rate structure under 30 Del. C. § 1102, with the first $2,000 of taxable income taxed at zero.4Delaware Code Online. Delaware Code Title 30 Chapter 11 Subchapter I – General Provisions The brackets:
- $0 to $2,000: 0%
- $2,001 to $5,000: 2.2%
- $5,001 to $10,000: 3.9%
- $10,001 to $20,000: 4.8%
- $20,001 to $25,000: 5.2%
- $25,001 to $60,000: 5.55%
- Over $60,000: 6.6%
Non-residents apply these brackets only to Delaware-source taxable income, not to total income from all states.
Remote Work and the Convenience of the Employer Rule
Delaware applies a “convenience of the employer” rule that catches many remote workers off guard. If you work for a Delaware-based employer but perform your duties from home in another state, Delaware still treats that income as Delaware-sourced when you’re working remotely for your own convenience rather than because your employer requires it.5State of Delaware. Delaware Division of Revenue Technical Information Memorandum 2022-2 Under 30 Del. C. § 1124(b), compensation is sourced to Delaware if it is “attributable to employment in this State and not required to be performed elsewhere.”
The practical test: once your employer allows you to return to a Delaware office and you choose to keep working from home, those home-office days count as Delaware days on Schedule W. You can only exclude days from Delaware sourcing if your employer required you to work outside the state as a condition of your job. If you split time between a Delaware office and a home office in another state, keep careful records of which days you were physically in Delaware and which days you were required to work elsewhere.
How to Avoid Being Taxed Twice
Because Delaware has no reciprocity with any state, you will likely owe tax to both Delaware and your home state on the same income. The relief comes from your home state, not from Delaware. Most states offer a credit for income taxes paid to another state, so your Delaware tax reduces what you owe at home. You typically file the Delaware non-resident return first, calculate the Delaware tax, then claim that amount as a credit on your home-state return.
The credit is usually capped at what your home state would have charged on that income. If your home-state rate is lower than Delaware’s, you won’t get a full offset. If it’s higher, you’ll owe the difference at home. You won’t pay more than the higher of the two rates on the same dollars, but you also won’t escape both states.
Selling Delaware Real Estate
Non-resident sellers of Delaware real estate face upfront withholding at settlement. Under 30 Del. C. § 1126, every non-resident seller must file either an estimated tax declaration or an alternative form with the Recorder at closing.6Delaware Code Online. Delaware Code Title 30 Chapter 11 Subchapter III – Nonresident Individuals The withholding applies the highest marginal rate (currently 6.6%) to the estimated gain, or to the difference between the sale price and all recorded liens.
Exceptions exist. If the sale qualifies for a federal capital gains exclusion such as the primary-residence exclusion, or if the transfer is a foreclosure or deed in lieu of foreclosure, the seller can file a declaration claiming the exemption instead of paying the withholding. The declaration must cite the specific Internal Revenue Code provision relied on. Any overwithheld amount is refunded when you file Form 200-02 NR for the year.
Estimated Tax Payments
If you expect to owe more than $800 in Delaware tax after any withholding, you have to make quarterly estimated payments. This most often affects self-employed workers, independent contractors, and non-residents with rental or pass-through income where no employer is withholding on their behalf. Payments are made on Form PIT-EST, with quarterly due dates that generally follow the federal schedule. Skipping required estimates can trigger an underpayment penalty even if you pay the full balance when you file.
The Filing Deadline
Delaware’s individual income tax filing deadline for the 2025 tax year is April 30, 2026, for residents and non-residents alike.7State of Delaware. Delaware’s Tax Season Starts January 26, 2026 That’s a full month later than the federal April 15 date, which gives you extra time but also makes it easy to forget Delaware after finishing your federal return. Interest and penalties on any Delaware tax owed begin accruing after April 30 regardless of any extension.
Penalties If You File or Pay Late
Delaware charges separate penalties for failing to file and for failing to pay. The failure-to-file penalty runs at 5% of unpaid tax per month, up to a maximum of 50% of the tax owed. A separate underpayment penalty applies at a lower monthly rate when you file but don’t pay in full.
Interest on unpaid tax accrues at 0.5% per month from the original due date until the balance is paid, which works out to 6% per year and compounds on top of penalties.8Division of Revenue – State of Delaware. Personal Income Tax FAQs Prolonged noncompliance can lead to enforcement under 30 Del. C. § 554, which lets Delaware obtain a court judgment by filing a tax certificate, creating a lien against your property that lasts 20 years with no property or wage exemptions.9Justia. Delaware Code Title 30 Chapter 5 Subchapter IV Section 554 – Obtaining Court Judgment by Filing Certificate For non-residents who’ve been earning Delaware income without filing, voluntary compliance before the state comes looking is almost always cheaper.
Deductions and Credits
Non-residents can reduce Delaware taxable income through deductions, though the amounts are smaller than the federal figures. The standard deduction for the 2025 tax year is $3,250 for single filers and $6,500 for married couples filing jointly. If you itemize, you can deduct expenses like mortgage interest, qualifying medical costs, and charitable contributions, but only in proportion to the ratio of your Delaware income to your total income.
Delaware also gives a personal credit of $110 for each federal personal exemption you’re entitled to, plus another $110 if you’re age 60 or older.10Justia. Delaware Code Title 30 Chapter 11 Subchapter II Section 1110 – Personal Exemptions and Credits This one comes off your tax bill directly, not your taxable income.
If you qualify for the federal Earned Income Tax Credit, Delaware lets you choose between a nonrefundable state credit of 20% of the federal EITC or a refundable credit of 4.5% of the federal amount.11Justia. Delaware Code Title 30 Chapter 11 Subchapter II Section 1117 – Earned Income Tax Credit The nonrefundable version is larger but can only take your tax to zero; the refundable version can produce a small refund even when you owe nothing.