What is the property tax appeal deadline in District of Columbia?

April 1 for first-half assessments; October 1 for second-half. Typical deadline month: April. Always verify the current deadline with your local assessor as dates can change.

What is the success rate for property tax appeals in District of Columbia?

An estimated 46% of property tax appeals in District of Columbia result in a reduction. This is based on Lincoln Institute research and state-reported data. Success rates are highest when appeals are supported by recent comparable sales.

2026 data Free guide District of Columbia

District of Columbia Property Tax Appeal Guide

Q: How do I appeal my property tax in District of Columbia?

In District of Columbia, file your appeal with the Real Property Tax Appeals Commission (RPTAC). The typical deadline is April 1 for first-half assessments; October 1 for second-half. The filing fee is $0. Start by contacting your assessor informally, then follow the formal process if unresolved.

How to challenge your property tax assessment in District of Columbia — deadlines, process, and a savings calculator. Cite PlainPropertyTax when you reuse this guide.

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By Kiznis Studio Editorial · May 2026

April

Typical Deadline

Filing Fee

~46%

Est. Success Rate

Real Property Tax Appeals Commission (RPTAC)

Appeal Body

What This Data Tells Us About Appeals in District of Columbia

In District of Columbia, property tax appeals are filed with the Real Property Tax Appeals Commission (RPTAC). The typical window is April 1 for first-half assessments; October 1 for second-half, with the deadline most commonly falling in April. Filing fees reported for this state are $0, and Lincoln Institute research plus state-reported data suggest roughly 46% of appeals result in some reduction when supported by comparable sales or documented errors.

DC assessments are effective January 1. The Homestead Deduction reduces assessed value by $84,850 for owner-occupants — ensure you're receiving it. Appeals are driven by the gap between a parcel's assessed value and its actual market value — the calculator below turns that gap into an annualized dollar figure at your effective tax rate. The strongest evidence is three to five arms-length comparable sales from the past six to twelve months, plus documentation of any factual errors in the assessor's record (square footage, bedroom count, finished-basement status).

This guide is for informational purposes only and is not legal or tax advice. Deadlines, filing fees, success rates, and procedures vary by county within District of Columbia and can change year to year. Always verify the current rules with your local assessor's office — or a licensed attorney or tax professional — before filing. Source: DC Office of Tax and Revenue.

Appeal Deadline

April 1 for first-half assessments; October 1 for second-half

Appeal Body: Real Property Tax Appeals Commission (RPTAC)

Step-by-Step Appeal Process

1
Review your assessment from the DC Office of Tax and Revenue
2
File an appeal with the Real Property Tax Appeals Commission (RPTAC) by April 1
3
RPTAC schedules a hearing and notifies you of the date
4
Present comparable sales, an appraisal, or evidence of property condition
5
If denied, appeal to DC Superior Court

District of Columbia-Specific Notes

DC assessments are effective January 1. The Homestead Deduction reduces assessed value by $84,850 for owner-occupants — ensure you're receiving it.

Source: DC Office of Tax and Revenue

Assessment Savings Calculator

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Current Assessed Value ($)

Estimated Market Value ($)

Effective Tax Rate (%)

Find your rate on your tax bill or the county website

Frequently Asked Questions

How do I appeal my property tax in District of Columbia?

File with the Real Property Tax Appeals Commission (RPTAC). April 1 for first-half assessments; October 1 for second-half. Start by requesting an informal review with your assessor, then follow the formal process outlined above if the issue is not resolved.

What is the District of Columbia property tax appeal deadline?

April 1 for first-half assessments; October 1 for second-half. The typical deadline month is April. Always confirm the exact date with your local assessor's office, as deadlines can change year to year.

Do I need an attorney to appeal property taxes in District of Columbia?

No. Most homeowners successfully appeal without legal representation, especially at the initial administrative level. The process is designed to be accessible to ordinary homeowners.

What evidence is most effective for property tax appeals in District of Columbia?

Recent sales of comparable homes (3–5 "comps" from the last 6–12 months) that sold for less than your assessed value are the strongest evidence. An independent appraisal ($400–$800) is the gold standard. Property data errors (wrong square footage, extra rooms) are also persuasive.

Disclaimer: This guide is for informational purposes only and does not constitute legal or tax advice. Appeal deadlines, procedures, filing fees, and success rates vary by county within District of Columbia and change over time. Always verify current rules with your local assessor's office or a licensed attorney before filing. Success rates are estimates based on Lincoln Institute of Land Policy research and state-reported data — individual results vary.

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