District of Columbia Estate
Tax Calculator

The District of Columbia imposes a separate estate tax with an exemption of **$4.53 million**, significantly below the federal threshold. Estates exceeding this amount face graduated rates from 11.2% to 16% on the taxable portion.

DC periodically adjusts its exemption — it rose from **$4 million** to the current level following 2023 legislative changes.

Because DC's exemption is roughly one-third of the federal exemption, a substantial number of estates that owe no federal tax still face DC estate tax liability. This gap makes DC estate tax planning critical for high-net-worth residents of the District.

The federal estate tax exemption stands at approximately $15 million for 2025, with portability between spouses. DC's exemption of **$4.53 million** operates independently — there is no portability of the DC exemption.

This means a surviving spouse cannot use the deceased spouse's unused DC exemption, even if they elect federal portability.

For estates valued between the DC exemption and the federal exemption, only DC estate tax applies. The DC tax is calculated on the full taxable estate above the exemption, not just the amount exceeding the federal threshold.

Federal and DC liability must be computed separately using each jurisdiction's own rate schedule.

DC does not impose an inheritance tax, so the estate tax is the sole state-level transfer tax concern. However, the combination of DC income tax rates (up to 10.75%) and estate tax rates (up to 16%) creates a significant tax environment for wealthy residents.

Some families choose to establish domicile in Virginia or Maryland suburbs, though Maryland itself imposes both an estate and inheritance tax.

Credit shelter trusts are essential for married couples domiciled in DC to preserve both spouses' DC exemptions. Without such planning, the first-to-die spouse's DC exemption is effectively wasted due to the unlimited marital deduction and the absence of portability.

Model your DC estate tax liability using this estimator. Enter gross estate value, deductions, and marital status to see projected DC and federal tax side by side — free for all jurisdictions.

District of Columbia residents with taxable estates face a two-layer system: the federal estate tax (exemption of $15 million in 2025, top rate of 40%) and the District of Columbia estate tax (exemption of $4.53 million). The gap between these exemptions creates a range where only the state tax applies.

An estate valued at $8 million, for example, may owe District of Columbia estate tax while owing nothing at the federal level.

The federal return (Form 706) allows a deduction for state estate taxes paid, which partially offsets the double-taxation effect but does not eliminate it. The state tax is deductible on the federal return as an estate administration expense or under the state death tax credit rules, depending on the estate's circumstances.

The net result is that combined effective rates in District of Columbia can exceed 45% on estates large enough to trigger both layers.

Planning for this interaction requires modeling both taxes simultaneously. Strategies that reduce the District of Columbia taxable estate — such as lifetime gifts, charitable bequests, and irrevocable trusts — may also reduce federal exposure, but the relative benefit depends on where the estate falls within each jurisdiction's rate brackets.

Use our District of Columbia estate tax calculator to model both layers side by side, and check the District of Columbia probate cost calculator to estimate administration expenses.

Federal law permits a surviving spouse to use the deceased spouse's unused exclusion (DSUE) — commonly called portability — by timely filing Form 706 for the first-to-die spouse. This allows married couples to shelter up to $30 million federally without trust-based planning.

However, most estate-tax states, including District of Columbia, do not offer portability of the state exemption.

This asymmetry makes bypass trusts (also called credit shelter trusts or B trusts) essential in District of Columbia. At the first spouse's death, funding a bypass trust up to the District of Columbia exemption amount preserves that exemption for state tax purposes.

Without the trust, the unlimited marital deduction passes everything to the surviving spouse tax-free at the first death — but the surviving spouse's estate then has only one District of Columbia exemption, effectively wasting the first spouse's.

The bypass trust should be sized carefully. Overfunding it beyond the District of Columbia exemption wastes the marital deduction benefit; underfunding it fails to capture the full state exemption.

For married couples with estates above $4.53 million but below $15 million, the bypass trust is the single most impactful planning tool available. Review your plan with the District of Columbia estate tax estimator, and use the executor fee calculator to account for administration costs in your projections.

The $4.53 million District of Columbia exemption establishes a lower threshold than the federal exemption, making proactive estate reduction strategies more urgent. Irrevocable trusts are the primary vehicle: irrevocable life insurance trusts (ILITs) remove life insurance proceeds from the taxable estate, spousal lifetime access trusts (SLATs) allow married couples to remove assets while retaining indirect access, and qualified personal residence trusts (QPRTs) transfer a home at a discounted gift tax value.

Annual exclusion gifting — currently $19,000 per recipient (2025) — reduces the taxable estate dollar-for-dollar without consuming the lifetime gift exemption. For District of Columbia residents near the $4.53 million threshold, a sustained gifting program over several years can bring the estate below the state exemption entirely.

Charitable remainder trusts (CRTs) and charitable lead trusts (CLTs) offer additional reduction while generating income tax deductions.

GRATs (grantor retained annuity trusts) are particularly effective in low-interest-rate environments, transferring asset appreciation to beneficiaries with minimal or zero gift tax cost. For District of Columbia business owners, entity-level planning — family limited partnerships, LLCs with valuation discounts, and buy-sell agreements — can reduce the reportable value of closely held interests for both state and federal purposes.

Compare strategies using the District of Columbia estate tax calculator or find a District of Columbia estate planning attorney.