Washington D.C. does have a local income tax, and it works differently than state income tax

Washington D.C. is not a state — it is a federal district — but it does collect income tax from residents and workers. The D.C. Department of Revenue runs the tax system, and the rates and rules are separate from any state you may live in. If you work in D.C. or live there, you will owe D.C. income tax in addition to any federal income tax.

D.C. income tax applies to wages, self-employment income, interest, dividends, and other earnings. The tax is progressive, meaning the rate increases as your income goes up. For the 2024 tax year, D.C. rates range from 4% on the lowest bracket to 9.75% on the highest, though these rates change year to year and depend on your filing status.

One key difference from state income tax: if you live in D.C. but work in Maryland or Virginia, you may owe tax to both D.C. and that state. However, D.C. offers a credit for taxes paid to other jurisdictions to prevent double taxation on the same income. The exact credit depends on where you worked and how much you earned.

Key Takeaways

  • D.C. collects income tax on residents and people who work there, with rates ranging from 4% to 9.75% depending on income level and filing status.
  • D.C. income tax is separate from federal income tax and from any state income tax you may owe if you live in Maryland, Virginia, or another state.
  • If you work in D.C. but live in another state, you typically owe tax to both D.C. and your home state, though D.C. offers a credit to reduce double taxation.
  • You file D.C. income tax using Form D-40 (resident return) or Form D-40NR (nonresident return) by the same April important date as federal taxes.

Who has to file D.C. income tax

You must file a D.C. return if you are a resident of D.C. and your income exceeds the filing threshold for your status. A resident is someone who lived in D.C. for more than 183 days in the tax year, or someone who maintained a permanent home there. The filing threshold varies by age and filing status — for example, in 2024 a single person under 65 must file if gross income was $13,850 or more, but these amounts change annually.

You must also file if you are a nonresident who worked in D.C. and earned income there, even if you lived elsewhere. Nonresidents file Form D-40NR instead of Form D-40. If you worked in D.C. for only part of the year, you still file if your D.C. income alone exceeded the threshold.

Self-employed people and business owners in D.C. have additional filing requirements. You may need to file quarterly estimated tax payments if you expect to owe more than a certain amount. The D.C. Department of Revenue website lists current thresholds and due dates.

D.C. income tax rates and brackets for 2024

D.C. uses a progressive tax system with six tax brackets. The rate you pay depends on your taxable income and your filing status — single, married filing jointly, married filing separately, or head of household. Lower-income filers pay 4%, and the rate steps up through 6%, 6.5%, 8.75%, and 9.5% before reaching the top rate of 9.75% on the highest incomes.

The income ranges for each bracket differ by filing status. A single filer and a married couple filing jointly reach the top bracket at different income levels. The D.C. Department of Revenue publishes updated tax tables each year, and these are available on their website or through tax software.

D.C. also allows a standard deduction, which reduces your taxable income before you calculate tax owed. The standard deduction amount varies by filing status and age. If you are 65 or older, you may may have access to for a higher standard deduction. You can also itemize deductions instead if that results in a larger reduction.

How D.C. taxes work if you live outside the district

If you live in Maryland, Virginia, or another state but work in D.C., you owe D.C. income tax on the money you earned there. You file Form D-40NR (Nonresident Income Tax Return) with D.C. and report only the income you earned within D.C. — not income from your home state.

To avoid paying tax twice on the same income, D.C. offers a credit for taxes paid to your home state. The credit is limited: it cannot exceed the D.C. tax you owe on that income, and it applies only to tax paid to another state on D.C. source income. You claim this credit on your D.C. return. Your home state may also offer a credit for D.C. taxes paid, so check your state's rules as well.

Some employers in D.C. withhold D.C. income tax from your paycheck automatically. If your employer does this, the amount withheld appears on your W-2 form in Box 19. You report this withholding when you file your D.C. return, and it reduces the tax you owe or increases any refund you receive.

Filing your D.C. income tax return

D.C. residents file Form D-40 (Individual Income Tax Return) by April 15 each year, the same important date as federal taxes. Nonresidents file Form D-40NR. Both forms are available on the D.C. Department of Revenue website, and you can file by mail or electronically through approved tax software.

You will need your Social Security number, W-2 forms from any employers, 1099 forms for self-employment or other income, and records of any D.C. taxes already withheld. If you itemize deductions, gather receipts for mortgage interest, property taxes, charitable donations, and other deductible expenses. If you claim the standard deduction, you do not need to provide receipts.

If you cannot file by April 15, you can request an extension from the D.C. Department of Revenue. An extension gives you until October 15 to file, but it does not extend the important date for paying any tax owed. If you owe money, you should pay by April 15 to avoid penalties and interest, even if you file late.

D.C. tax credits and deductions you may use

D.C. offers several credits that reduce your tax bill directly. The Earned Income Tax Credit (EITC) is available to low- and moderate-income workers and is worth more in D.C. than the federal credit. The Child and Dependent Care Credit helps pay for childcare expenses. The Education Credit covers tuition and fees at colleges and universities. Each credit has income limits and other requirements.

On the deduction side, D.C. allows you to deduct mortgage interest, property taxes, and charitable contributions if you itemize. D.C. also allows a deduction for contributions to certain retirement accounts, such as traditional IRAs and SEP-IRAs. Self-employed people can deduct half of their self-employment tax and business expenses.

D.C. does not allow a deduction for state and local sales tax, but you can deduct state and local income taxes paid to other states (up to a limit). Check the current D.C. tax forms and instructions for the full list of credits and deductions, as these change from year to year.

What happens if you do not file or pay D.C. income tax

If you owe D.C. income tax and do not file or pay, the D.C. Department of Revenue can assess penalties and interest. Penalties for late filing are typically 5% of the unpaid tax per month, up to 25%. Interest accrues daily on unpaid tax at a rate set by D.C. each quarter. If you file late but pay in full, the penalty may be reduced.

The D.C. Department of Revenue can also place a lien on your property or garnish your wages to collect unpaid tax. If you owe a large amount, they may refer your case to a collection agency. If you cannot pay the full amount, you can request a payment plan or an offer in compromise, which allows you to settle for less than you owe under certain circumstances.

If you believe you do not owe D.C. tax — for example, because you did not live there long enough or did not earn income there — you can file a return showing zero income and explain your situation. Filing a return protects you from penalties for not filing, even if you ultimately owe nothing.

Frequently Asked Questions

Do I owe D.C. income tax if I only worked there for a few months?

Yes, if your D.C. income for the year exceeded the filing threshold for your status. You report only the income you earned in D.C., not income from other states. If your employer withheld D.C. tax, that amount is credited against what you owe, and you may receive a refund if more was withheld than you actually owed.

Can I claim the D.C. Earned Income Tax Credit if I live in another state?

The D.C. EITC is available to D.C. residents only. If you live in Maryland, Virginia, or another state, you cannot claim the D.C. credit, but you may be able to claim your home state's EITC. Check your state's tax rules to see what credits you may have access to for based on where you live and work.

What if my employer did not withhold D.C. income tax from my paycheck?

You are still responsible for paying D.C. income tax on your D.C. earnings. When you file your return, you will owe the full tax amount minus any estimated tax payments you made. If you expect to owe a large amount, you can make quarterly estimated tax payments to the D.C. Department of Revenue to avoid a big bill at tax time.

Is D.C. income tax the same as federal income tax?

No. D.C. income tax is separate from federal income tax. You file both a federal return (Form 1040) and a D.C. return (Form D-40 or D-40NR). D.C. rates, brackets, deductions, and credits are different from federal ones. You owe both taxes if you are a D.C. resident or earned income in D.C.

How do I know if I am considered a D.C. resident for tax purposes?

You are a D.C. resident if you lived in D.C. for more than 183 days in the tax year, or if you maintained a permanent home there and spent any part of the year there. If you moved to or from D.C. during the year, count the days you actually spent there. The D.C. Department of Revenue can clarify your residency status if you are unsure.