Colorado Estate
Tax Calculator

Colorado does not impose a state estate tax or inheritance tax. The state's estate tax expired when the federal credit was eliminated, and Colorado has not enacted a replacement.

Colorado estates are subject only to the federal estate tax.

Colorado's growing population and rising real estate values along the Front Range corridor have increased the number of estates approaching federal thresholds. Those in Denver, Boulder, and resort communities like Aspen and Vail increasingly encounter potential federal estate tax exposure.

Only the federal estate tax applies in Colorado. The **$15 million exemption (2025) with portability and a 40%** top rate governs.

No state-level filing is required.

Colorado is a common-law property state but enacted the Uniform Disposition of Community Property Rights Act, which preserves the community property character of assets brought into Colorado from a community property state. This can affect basis step-up calculations for those who relocated from California, Texas, or other community property jurisdictions.

Colorado's Beneficiary Deed Act (C.R.S. 15-15-401) allows non-probate transfer of real property, simplifying administration.

Colorado also permits transfer-on-death designations for motor vehicles and securities, reducing the probate estate and associated costs.

Mountain resort properties often present valuation challenges due to seasonal market fluctuations and limited comparable sales. Families with Aspen, Vail, or Telluride real estate should engage appraisers with specific resort market expertise.

Conservation easements on ranch and agricultural properties are also common in Colorado and can significantly reduce estate values for both federal estate tax and land preservation purposes.

Colorado residents with growing estate values should evaluate federal exposure. Use this calculator to estimate federal estate tax and explore portability or gifting strategies.

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Because Colorado does not impose a state estate tax, the federal estate tax is the only transfer tax layer. The current federal exemption of $15 million per individual (2025) shelters the vast majority of estates.

However, estates that exceed this threshold face a top marginal rate of 40%, making federal planning essential for high-net-worth Colorado residents.

The Tax Cuts and Jobs Act (TCJA) doubled the federal exemption effective 2018, but this increase is scheduled to sunset after 2025. If Congress does not act, the exemption will revert to approximately $7 million (adjusted for inflation).

For Colorado residents with estates between $7 million and $15 million, this sunset creates a planning window: transfers made now under the higher exemption will not be clawed back, even if the exemption later decreases.

The absence of a state estate tax in Colorado simplifies the analysis — there is no gap between state and federal exemptions to navigate, no separate state return to file, and no risk of double taxation. However, this also means there is no state-level deduction to offset federal liability.

Federal planning tools — marital deductions, charitable deductions, and the unified credit — carry the full weight of estate tax mitigation. Use the Colorado estate tax calculator to model current and post-sunset scenarios, and review the Colorado probate cost calculator to understand full settlement costs.

Federal portability allows a surviving spouse to inherit the deceased spouse's unused estate tax exclusion (DSUE), effectively doubling the available federal exemption to $30 million for married couples. Electing portability requires filing Form 706 for the first-to-die spouse, even if no federal estate tax is owed — a step that is frequently overlooked when no tax appears to be due.

Because Colorado does not impose a state estate tax, there is no state-level portability concern. The federal election is the only one that matters, and it applies automatically to the surviving spouse's estate once made.

This is simpler than in estate-tax states, where the lack of state portability forces the use of bypass trusts to preserve both exemptions.

Despite this simplicity, portability has limitations. The DSUE amount is not indexed for inflation — it locks in at the value of the first spouse's unused exemption at the date of death.

If the surviving spouse remarries and the new spouse dies, the DSUE from the first spouse is lost. For Colorado families with significant wealth, bypass trusts may still be preferable to portability because they provide asset protection, generation-skipping benefits, and inflation-adjusted growth outside the surviving spouse's taxable estate.

Use the executor fee calculator and probate cost calculator to understand the full administration picture when comparing trust structures.

Without a state estate tax, Colorado residents focus planning efforts on the federal layer. The current $15 million exemption provides substantial shelter, but the scheduled TCJA sunset makes it prudent to accelerate planning.

Irrevocable trusts — including ILITs, SLATs, and QPRTs — remove assets from the taxable estate permanently. Once transferred, these assets and their future appreciation are outside the federal estate, regardless of future exemption changes.

Annual exclusion gifts of $19,000 per recipient (2025) remain the simplest estate reduction tool. Married couples can jointly gift $38,000 per recipient through gift-splitting.

Over a decade, a family gifting to four beneficiaries annually removes $1.44 million from the estate with no gift tax return required. Charitable deductions — whether through outright bequests, donor-advised funds, or charitable trusts — further reduce the taxable estate while supporting philanthropic goals.

GRATs and GRUTs (grantor retained unitrusts) transfer appreciation to beneficiaries at minimal transfer tax cost. For Colorado residents holding concentrated stock positions or rapidly appreciating assets, these vehicles are particularly efficient.

Family limited partnerships and LLCs may provide valuation discounts for gift and estate tax purposes, though the IRS scrutinizes these structures closely. Professional valuation and proper documentation are essential.

Model your federal exposure with the Colorado estate tax calculator, or find an estate planning attorney in Colorado for personalized guidance.