Washington DC Estate Tax: Rates, Deductions, and Filing Deadlines

The Washington, D.C. estate tax applies to a decedent’s taxable estate above a local exemption of $4,873,200 for deaths in 2025, with rates climbing from 6.4% to a top rate of 16%, and the return and payment are due within 10 months of death.¹ Because that exemption sits far below the federal threshold, a District estate can owe local tax even when it owes nothing to the IRS.

When a DC Estate Owes Tax

DC uses what the statute calls a “zero bracket amount,” which works as the exemption. Everything up to that figure is taxed at 0%, and only the excess is taxed at all. For 2025 deaths, that line is $4,873,200.¹ If the gross estate falls below that figure, no DC estate tax return has to be filed.

The number adjusts each year using the Washington-Baltimore Consumer Price Index, applied to a $4 million base that took effect for deaths after December 31, 2020.² The 2026 figure had not been published at the time of writing but will be slightly higher.

By comparison, the federal estate tax exemption for 2025 is $13,990,000.³ That federal number is scheduled to drop sharply in 2026 when the Tax Cuts and Jobs Act’s temporary increase expires, reverting to roughly $5 million adjusted for inflation unless Congress acts.⁴ More DC estates could face both federal and local filings in 2026 than in prior years.

How the Rates Actually Apply

The tax is progressive. Rates start at 6.4% and climb to a top rate of 16% on the portion of the taxable estate above $10 million.⁵ The intermediate brackets step up in roughly 0.8-point increments at each $500,000 or $1,000,000 level between those endpoints.

Because the zero bracket amount sits above $4.8 million, every bracket below that level produces no tax at all. The first dollar of actual tax falls in the $4,000,000 to $5,000,000 bracket at 11.2%. For an estate worth $6 million, only the portion above $4,873,200 is taxed, split between the 11.2% and 12% brackets. The schedule looks steep on paper, but the exemption absorbs the lower brackets entirely.

What Counts in the Gross Estate

The gross estate includes everything the decedent owned or had an interest in at death, valued at fair market value on the date of death.² Real estate, bank accounts, and investment portfolios are the obvious pieces. Several items commonly get overlooked:

Life insurance proceeds, when the decedent owned the policy or could change the beneficiary, count toward the gross estate even though the payout goes to someone else.
Retirement accounts such as IRAs and 401(k)s are included at their full balance.
Property held jointly with someone other than a spouse is included to the extent of the decedent’s contribution.
Business interests in closely held companies, partnerships, or LLCs must be valued and included.

The Office of Tax and Revenue expects valuations to match the methodology used on federal Form 706, so a professional appraisal for real estate, art, jewelry, and business interests is the standard way to document the numbers.

Deductions That Reduce the Taxable Estate

Once the gross estate is totaled, several categories of deductions bring the taxable figure down:

Property passing to a surviving spouse is fully deductible under the marital deduction, which often zeroes out the DC tax at the first death.
Bequests to qualifying charitable or tax-exempt organizations under IRC Section 501(c) are deductible.⁶
Reasonable funeral and burial costs are deductible.
Administration expenses, including legal fees, executor commissions, and appraisal costs, come off the top.
Debts the decedent owed at death, such as mortgages, credit card balances, and medical bills, are deductible.

Why Married Couples Lose the First Exemption

At the federal level, a surviving spouse can claim the deceased spouse’s unused estate tax exemption, effectively doubling the amount that passes tax-free at the second death. DC has no equivalent. The District’s estate tax statute contains no portability provision, so each spouse gets only their own zero bracket amount.

That creates a planning trap. If the first spouse leaves everything to the survivor through the marital deduction, the DC tax at the first death is zero, but the first spouse’s entire DC exemption is wasted. When the surviving spouse later dies holding the combined assets, only one exemption shelters the estate. On a combined estate of $9 million, the wasted exemption could cost roughly $500,000 or more in DC estate tax that proper planning would have avoided.

The common fix is a credit shelter trust, sometimes called a bypass trust, funded at the first death with assets equal to the DC zero bracket amount. Those assets stay outside the surviving spouse’s taxable estate while the survivor keeps access to the income.

When Non-Residents Owe DC Estate Tax

Non-residents who own real property or tangible personal property located in DC are subject to the District’s estate tax on those assets. The statute sets taxable situs by where real estate sits and where tangible personal property is customarily located at death.² Intangible property such as stocks and bank accounts follows the decedent’s domicile, so non-residents generally don’t owe DC tax on those holdings. The exception is intangible property used in a trade or business in the District.

The non-resident tax is calculated by first figuring the tax as if the decedent had been a DC resident with the entire estate, then prorating that amount by the ratio of DC-situs property to the total gross estate. A $1.5 million DC condo inside a $10 million estate produces roughly 15% of the full computed tax, not a standalone calculation on the condo alone.

Filing Deadlines and Forms

The DC estate tax return must be filed and the tax paid within 10 months of the decedent’s death.⁷ The main form is Form D-76, with payment voucher Form D-76P when tax is owed. Both are available through the Office of Tax and Revenue’s online portal.

The D-76 relies heavily on data from federal Form 706. Even when the estate falls below the federal filing threshold, DC expects a completed pro forma Form 706 to support the asset values and deductions on the DC return, and a copy of the federal return (or pro forma version) must be filed with the DC return.⁶

Extensions

A six-month extension to file the DC return can be requested on Form D-77, submitted before the original 10-month deadline. Another six months is available when the personal representative is located outside the United States.

A more generous rule is tied to the federal return. If the personal representative obtains a federal extension for Form 706, the DC filing deadline automatically extends to 30 days after the federal extended deadline.⁷ A copy of the federal extension must be provided to the Office of Tax and Revenue.

Payment Timing

The tax payment is due when the return is due.⁷ A filing extension through Form D-77 does not extend the payment deadline, so interest and failure-to-pay penalties begin accruing from the original due date. The exception matters: if you’ve obtained a federal filing extension, the DC payment deadline shifts to match the extended DC filing deadline. Personal representatives who expect any delay should still pay an estimate by the original deadline when relying on a standalone DC extension.

Penalties and Interest for Missing the Deadline

DC’s late-filing and late-payment penalties are steep. The failure-to-file penalty runs at 5% of the unpaid tax for each month the return is late, capping at 25%, and a separate failure-to-pay penalty accrues at 5% per month, also capping at 25%.⁸ The two can stack, so an estate that neither files nor pays on time can face combined penalties of up to 50% of the tax due.

Interest runs at 10% per year, compounded daily, from the original due date.⁹ Interest cannot be waived for reasonable cause even when penalties are. On a large tax bill, daily compounding adds up quickly.

Closing Out the Estate

Once the Office of Tax and Revenue reviews the return and confirms the tax has been paid, it issues a closing letter. Title companies and financial institutions handling real property transfers or account distributions from the estate may require the closing letter before releasing assets, so a slow return can hold up the whole settlement.

One point of relief for beneficiaries: DC does not impose a separate inheritance tax. The District had one historically, but it applied only to deaths before April 1, 1987.¹ Today the estate tax paid by the estate itself is the only District-level death tax, and beneficiaries do not owe DC tax on what they receive.

1
Office of Tax and Revenue. DC Estate, Inheritance and Fiduciary Tax Information
2
D.C. Law Library. District of Columbia Code 47-3701 – Definitions
3
Internal Revenue Service. Estate Tax
4
Internal Revenue Service. Estate and Gift Tax FAQs
5
D.C. Law Library. District of Columbia Code 47-3702 – Tax on Transfer of Taxable Estate of Residents; Amounts; Credit; Property of Resident Defined
6
Office of Tax and Revenue. D-76 Estate Tax Instructions
7
D.C. Law Library. District of Columbia Code 47-3705 – Filing Returns; Payment of Tax Due
8
D.C. Law Library. District of Columbia Code 47-4213 – Failure to File or Pay Tax
9
D.C. Law Library. District of Columbia Code 47-4201 – Interest on Underpayments