District of Columbia Homestead Exemption: ASD-100 Filing Micro-Guide & OTR Tax Rules
Property owners in Washington, D.C. receive a massive $91,950 reduction in their home’s assessed value prior to computing their annual property taxes. At the standard Class 1 residential rate of $0.85 per $100 of assessed value, this creates a guaranteed tax savings of exactly $781.58 every year.
In addition to the basic deduction, D.C. imposes a strict 10% Assessment Cap limiting tax hikes. Seniors (Age 65+) and disabled individuals with a federal AGI under $163,500 receive an even greater benefit: a sweeping 50% reduction in their total property tax bill.
D.C. Insider Tips: What Generic Sites Won’t Tell You
Filing in the District of Columbia is notoriously strict regarding the definition of “Domicile.” You cannot simply use your D.C. condo as a pied-à-terre and claim the deduction.
The Strict Domicile Test
The Office of Tax and Revenue (OTR) cross-references your application with your D.C. individual income tax returns (Form D-40) and your D.C. driver’s license. If you are registered to vote in Maryland or Virginia, or if your car is registered outside the District, OTR will reject your ASD-100 application immediately.
Cooperative Housing Bypass
If you live in one of D.C.’s many Cooperative Housing Associations (Co-ops), you cannot file a standard homestead application directly on MyTax.DC.gov for your specific unit. Instead, the Co-op Board or Management Company collects your application and applies the credit proportionally to your monthly maintenance fee.
The Half-Year Benefit Trap
D.C.’s tax year runs from October 1 to September 30. If you file a properly completed application between October 1 and March 31, you receive the full $91,950 deduction. If you file between April 1 and September 30, you only receive one-half of the benefit on your second-half tax bill.
Exact Micro-Guide: How to File Form ASD-100 Using MyTax.DC.gov
Filing your homestead exemption is 100% free. OTR handles exemptions digitally through the MyTax.DC.gov portal. Follow these exact local micro-steps so you aren’t left guessing what to click or getting rejected for an ID mismatch.
Update Your Driver’s License First
Before you open the portal, your D.C. Driver’s License MUST match the physical property address. Go to the D.C. DMV to update it. OTR checks this to confirm you are legally domiciled in the District.
Locate Your Square, Suffix, and Lot
D.C. tracks properties using a “Square, Suffix, and Lot” (SSL) number. You can find this on your closing paperwork, your deed, or by searching your address in the D.C. Real Property Assessment Database.
Navigate to the MyTax.DC.gov e-Portal
Go to MyTax.DC.gov. You do not need to log in or create an account. Scroll down to the “Real Property” section and click “View More Options”.
Open MyTax.DC.gov ↗Select Application ASD-100
Under the “Real Property Quick Links” menu, click on “Submit an Application for Homestead Deduction (Including Senior Citizen/Disabled Tax Relief): ASD-100”.
Search Property & Answer Domicile Questions
Enter your Square, Suffix, and Lot number (or address) in the search bar. Click the resulting hyperlink. Answer the questionnaire confirming you own the home, occupy it, and file D.C. income taxes. If you are 65+, fill out the Senior Tax Relief section.
Upload ID and Submit
Upload a clear photo or PDF of your D.C. Driver’s License or ID card. Digitally sign the application and hit submit. Save the confirmation number. Processing takes approximately 20 business days.
How Much Is the D.C. Homestead Deduction?
The District of Columbia uses a flat dollar deduction mechanism combined with a fixed property tax rate, making it very easy to calculate exactly how much money you save every year.
- Without Deduction: $700,000 × 0.0085 = $5,950 annual tax bill.
- With Deduction: $700,000 − $91,950 = $608,050 taxable value.
- New Tax Bill: $608,050 × 0.0085 = $5,168.42 annual tax bill.
- Total Estimated Annual Savings: $781.58 in your pocket every single year.
D.C. Property Tax Classes & Exemption Matrix
The District of Columbia categorizes property into distinct classes. The Homestead Deduction applies strictly to Class 1 Residential properties containing no more than five dwelling units.
| Property / Owner Type | Description | Homestead Deduction | Senior / Disabled Relief | Assessment Cap |
|---|---|---|---|---|
| Class 1 Residential | Single-Family Home or Condo (Primary Residence) | $91,950 Deduction | N/A | 10% Cap |
| Senior Citizen (65+) | Homeowner age 65+ meeting income limits | $91,950 Deduction | 50% Off Final Bill | 10% Cap |
| Disabled Individual | Meets SSA or federal disability definition | $91,950 Deduction | 50% Off Final Bill | 10% Cap |
| Class 2 Commercial | Commercial buildings, hotels, motels | Not Eligible | Not Eligible | No Cap |
| Vacant / Blighted Property | Unoccupied residential properties | Not Eligible (Taxed at $5.00 or $10.00 per $100) | Not Eligible | No Cap |
D.C. Homestead Tax Savings Calculator
Estimate your total property tax reduction by entering your home’s appraised market value and your senior/disabled status. Calculations use the official D.C. Class 1 tax rate.
Estimated Annual Property Tax Bill
*Calculations use the fixed D.C. Residential Class 1 tax rate of $0.85 per $100 of assessed value. Assumes the 2026 Homestead Deduction of $91,950. Actual tax amounts may vary based on exact billing cycles.
The D.C. 10% Assessment Cap Limit
In bustling D.C. neighborhoods like Capitol Hill, Logan Circle, and Navy Yard, rapid real estate appreciation can drive market values upward. The D.C. Assessment Cap protects primary homeowners from sudden, extreme spikes in taxable valuation.
How the 10% Cap Operates
Once your homestead is established, the taxable assessed value of your property cannot increase by more than 10% per year, plus the market value of any new physical improvements (such as a major addition or renovation).
Market Value vs. Assessed Value
The OTR will continue reporting your home’s true Market Value on your Notice of Appraised Value. However, your actual property tax bill is computed using your Capped Assessed Value. You will see this cap represented as a credit on your tax bill.
Senior Citizen & Disabled Owner Tax Relief
The District of Columbia provides extraordinary tax protections for seniors and disabled homeowners. If you qualify, your property tax bill is literally cut in half.
The 50% Reduction
Homeowners who are 65 years of age or older, or individuals who meet federal disability guidelines, receive a 50% reduction on their final calculated property tax bill. This is applied *after* the standard $91,950 homestead deduction.
Income Limit Requirement
To qualify for Tax Year 2026, the total household federal adjusted gross income from 2024 must have been less than $163,500. This includes all persons residing in the household, excluding tenants paying fair market rent.
50% Ownership Rule
The senior or disabled individual must own 50 percent or more of the property (or cooperative unit) on the deed. If they own less than half, the relief cannot be claimed.
Specific D.C. Homestead Issues: Solutions & Next Steps
My Address Doesn’t Match Exactly (OTR Rejection)
If your driver’s license says you live in Maryland or Virginia, OTR will flag your application and reject it for failing the “Domicile” test.
Next Step: Ensure your D.C. DMV record matches the property. Apply for your D.C. driver’s license immediately upon moving in, and ensure you file a D-40 D.C. individual income tax return.
Property Is Held in a Revocable Trust
Trust-owned residential properties still qualify if the trustor or primary beneficiary occupies the home as their principal residence.
Next Step: The OTR requires you to submit the Trust documentation proving your legal right to occupy the property alongside Form ASD-100.
I Missed the March 31 Deadline
D.C.’s tax year runs Oct 1 – Sept 30. If you miss the March 31 mid-year deadline, you will only receive the half-year benefit for the current cycle.
Next Step: File Form ASD-100 immediately anyway! You will get the half-year benefit applied to your second-half tax bill, and the full benefit will apply automatically next year.
Recordation Tax Reduction (First Time Buyers)
Did you know D.C. offers a lower recordation tax rate (reduced to 0.725%) for eligible first-time homebuyers or lower-income buyers?
Next Step: You must file the D.C. Lower Income Homeownership Exemption form at the time of closing. It is deeply tied to homestead intent.
D.C. Office of Tax and Revenue (OTR) Contact Info & Map
District of Columbia Homestead Exemption FAQs
How much is the D.C. homestead deduction?
For Tax Year 2026, the D.C. homestead deduction removes $91,950 from your property’s assessed value before calculating taxes. This equates to an annual tax savings of $781.58.
Do seniors get a property tax break in D.C.?
Yes. Seniors (age 65 or older) and disabled individuals can receive a 50% reduction on their property tax bill. To qualify for TY 2026, the total household federal adjusted gross income from 2024 must be less than $163,500.
What is the 10% assessment cap in D.C.?
The homestead deduction automatically triggers an assessment cap that limits the increase of your home’s taxable assessed value to no more than 10% per year, protecting you from huge tax spikes.
How do I apply for the homestead deduction in D.C.?
You must submit form ASD-100 online via the MyTax.DC.gov portal. Search for your property using the Square, Suffix, and Lot number, click the ASD-100 link under Quick Links, and follow the prompts.
Do I need to renew the D.C. homestead deduction every year?
No. Once approved, the deduction remains on your property indefinitely as long as it remains your primary residence. You only need to notify OTR and cancel it if you move or rent out the property.