Estate Planning — Federal Tax Rules for Trusts, Wills & Wealth Transfer

Estate planning is the process of arranging the transfer of your assets after death (or during incapacity) in a way that minimizes taxes, avoids unnecessary legal proceedings, and ensures your wishes are carried out. While estate planning is primarily governed by state law (wills, trusts, probate, powers of attorney, and guardianship are all state-law creatures), federal tax law plays a dominant role in determining how much of your estate goes to your heirs versus the government. The key federal provisions: the estate tax (26 U.S.C. § 2001) applies a 40% tax on estates exceeding the exemption amount ($15 million per person for 2026); the gift tax (26 U.S.C. § 2501) taxes lifetime gifts exceeding the annual exclusion ($19,000 per recipient in 2026) using the same 40% rate and unified exemption; the generation-skipping transfer tax (26 U.S.C. § 2601) prevents wealthy families from avoiding estate tax by skipping generations; and the step-up in basis (26 U.S.C. § 1014) — one of the most valuable tax benefits in the code — adjusts the cost basis of inherited assets to their fair market value at death, eliminating capital gains tax on appreciation during the decedent's lifetime. These federal rules, combined with state probate and trust law, create the framework within which estates are planned and administered.

Current Law (2026)

Legal Authority

• 26 U.S.C. § 2001 — Imposition of estate tax (rate, computation)
• 26 U.S.C. § 2010 — Unified credit against estate tax (exemption amount)
• 26 U.S.C. § 1014 — Step-up in basis for property acquired from a decedent
• 26 U.S.C. §§ 2501–2524 — Gift tax (imposition, annual exclusion, marital deduction)
• 26 U.S.C. §§ 2601–2663 — Generation-skipping transfer tax
• State law — Wills, trusts, probate, powers of attorney, guardianship (Uniform Probate Code adopted in ~18 states)

How It Works

Federal transfer taxes currently affect a narrow slice of estates but matter enormously when they apply. For 2026, the basic exclusion amount is $15 million per person — the amount of taxable gifts and estate transfers shielded from the 40% estate and gift tax. Portability allows married couples to combine exclusions: if the first spouse to die files Form 706 to elect portability, the surviving spouse can use any unused exclusion, potentially shielding $30 million combined. See Estate Tax Portability for the mechanics. The unified credit also covers lifetime taxable gifts, so large gifts during life reduce the amount available at death. A revocable living trust is the most common planning tool — it lets you transfer assets during your lifetime while retaining control, avoids probate (the court-supervised process that can take months to years and cost 2–5% of the estate), and provides for management during incapacity. Because it's revocable, it provides no estate tax savings; trust assets are still in your estate. Irrevocable trusts — where you give up control — can remove assets from your taxable estate and achieve specific goals: ILITs keep life insurance proceeds out of your estate; GRATs transfer appreciation to heirs with minimal gift tax; charitable remainder trusts provide income for life with the remainder going to charity; dynasty trusts can preserve wealth across multiple generations in states that have abolished the rule against perpetuities.

The step-up in basis at death is one of the most valuable — and least discussed — features of the federal system. When your heirs inherit assets, their cost basis resets to fair market value at the date of your death. Stock you bought for $10,000 that's worth $500,000 when you die passes to your heirs with a $500,000 basis — permanently eliminating $490,000 in capital gain. This benefit costs the Treasury an estimated $40–50 billion per year and provides the strongest financial argument for holding highly appreciated assets until death rather than selling them during your lifetime. Finally, beneficiary designations — on life insurance, IRAs, 401(k)s, payable-on-death bank accounts, and transfer-on-death investment accounts — control assets that pass entirely outside your will or trust. If your will says "everything to my children" but your IRA names your ex-spouse, your ex-spouse gets the IRA, period. Outdated beneficiary designations are the most common source of estate planning failures, and reviewing them after any major life event is non-negotiable.

How It Affects You

If you haven't done estate planning yet, you're not alone — only about 33% of Americans have a will — but the consequences of inaction are real and specific. Without a will, your state's intestacy laws determine who inherits your assets, and those rules often don't match what you'd choose: in most states, a spouse and children split the estate (not everything to the spouse), unmarried partners get nothing regardless of how long you've been together, and stepchildren who were never legally adopted typically receive nothing. Without a durable power of attorney, a family member who needs to manage your finances during incapacity must seek a court-appointed conservatorship — an expensive, time-consuming process that can take months and cost $5,000–$20,000. Without a healthcare proxy/advance directive, hospitals default to whatever a state-specified hierarchy of relatives says, which may not be the person you'd choose. The essential starting list is short: (1) Will — who gets what; (2) Durable POA — who manages finances if you're incapacitated; (3) Healthcare proxy and living will — who makes medical decisions and what treatments you want; (4) Beneficiary designations on all life insurance, retirement accounts (IRAs, 401(k)s), and bank accounts — these override your will and are the most common source of estate planning disasters. A basic estate plan from an attorney typically costs $1,500–$3,000 and is worth every dollar.

If you're a married couple with meaningful assets, the most important immediate action for many couples is ensuring portability — the ability for a surviving spouse to use the deceased spouse's unused estate tax exemption. The 2026 federal exemption is $15 million per person, giving married couples a combined $30 million shelter. But portability isn't automatic: you must file Form 706 (the federal estate tax return) for the deceased spouse within 9 months of death (18 months with extension) to elect portability, even if no estate tax is owed. Couples who skip this step lose the deceased spouse's unused exemption forever. For most couples below the federal threshold, the near-term planning priorities are: making sure assets flow to the surviving spouse smoothly (beneficiary designations, joint accounts, or trust), checking whether your state has a lower estate tax threshold (17 states do — Massachusetts and Oregon start at $1 million), and ensuring life insurance proceeds stay outside the estate (an ILIT can help). For couples with closely held business interests or farms, valuation discounts for lack of marketability and control can legitimately reduce the estate tax value — but this requires ongoing gifting programs and documented business succession planning.

If you have a high-net-worth estate in excess of $15 million, your planning calendar matters as much as your strategy. The $15 million exemption (2026) is higher than it's ever been — the TCJA sunset provisions were permanently resolved in 2025, establishing this level with inflation adjustments going forward. Key planning levers in order of magnitude: large lifetime gifting (the annual exclusion is $19,000 per recipient, per donor, in 2026; a married couple can give $38,000 per recipient annually tax-free); GRATs (Grantor Retained Annuity Trusts) — a zero-gift-tax technique for transferring appreciation to heirs if assets outperform the IRS Section 7520 rate; intentionally defective grantor trusts (IDGTs) — allows you to sell assets to a trust for a note without triggering capital gains while removing appreciation from your estate; qualified opportunity zone investments for deferring capital gains (separate from estate planning but often coordinated); ILITs (Irrevocable Life Insurance Trusts) to keep insurance proceeds outside the taxable estate. The step-up in basis (§ 1014) is the most powerful benefit to protect — assets with large embedded gains (a business, real estate, securities held since the 1980s) should generally be held until death rather than gifted, because the step-up eliminates the gain permanently. Conversely, assets with losses or minimal appreciation are the right candidates for lifetime gifts.

If you're a parent of minor children, your will must name a guardian — without it, a court decides who raises your children, and the court's choice may not be yours. But guardian designation is often done incompletely: name both a guardian of the person (who raises them) and a guardian of the estate (who manages their money) — these should often be different people. More importantly, most parents should create a testamentary trust or a revocable trust rather than leaving assets outright to minors. A child who inherits at 18 has unrestricted access to the money; most 18-year-olds don't make good financial decisions with a large inheritance. A trust can stagger distributions (one-third at 25, one-third at 30, remainder at 35 is a common structure) and appoint a trustee to manage investments and make discretionary distributions for education, health, and support. Life insurance is the financial foundation of any plan for parents with young children and limited assets — a 20-year term life policy for each working parent, sized to replace income and pay off the mortgage, typically costs $30–$60/month for a healthy 35-year-old. The beneficiary of the policy should be the trust for the benefit of the children, not the children directly.

State Variations

Estate planning is fundamentally state law:

• Probate: Varies dramatically — some states have simple, inexpensive probate; others have complex, costly processes (California, New York). Revocable trusts can avoid probate in all states.
• State estate/inheritance taxes: ~17 states + D.C. impose their own taxes, often with lower exemptions ($1-6 million vs. the $15 million federal threshold). Your state tax bill may be significant even if you're below the federal threshold.
• Trust duration: Some states allow perpetual trusts (dynasty trusts); others enforce the rule against perpetuities (~90-year limit)
• Community property vs. common law: 9 states use community property (50/50 ownership of marital assets); 41 use common law (titled ownership) — this affects estate planning strategy
• Uniform Probate Code: Adopted in ~18 states, providing a modern, streamlined probate framework

Implementing Regulations

• 26 CFR Part 20 — IRS estate tax regulations (gross estate valuation, deductions, credits, and unified credit computation)
• 26 CFR Part 25 — Gift tax regulations (annual exclusion, lifetime exemption computation, split-gift elections, and marital deduction)
• 26 CFR § 1.1014 — Basis of property acquired from a decedent (stepped-up basis rules, alternate valuation date elections, and property acquired by bequest, devise, or inheritance)
• 26 CFR §§ 26.2601–26.2663 — Generation-skipping transfer tax regulations (GST exemption allocation, trust inclusion ratios, direct skip and taxable termination rules)

Pending Legislation

Estate tax reform including exemption level changes and stepped-up basis modifications are regularly proposed. See Federal Income Tax for related legislative activity in the 119th Congress.

Recent Developments

• 2026 exclusion amount increased: IRS Revenue Procedure 2025-32 set the 2026 basic exclusion amount at $15,000,000, up from $13,990,000 for 2025 decedents.
• Anti-clawback rules remain relevant: Treasury's anti-clawback regulations (T.D. 9884) still provide certainty that prior large gifts are not retroactively penalized if exclusion amounts fall in a future year.
• State estate-tax planning still matters: Federal exclusion amounts are now far above many state thresholds, so credit shelter trusts, disclaimer planning, and state-only QTIP elections remain important even for estates that are nowhere near the federal tax line.