2026 Estate Tax Underwriting Workbench: Portability, Liquidity & Forced-Sale Risk

The federal estate tax exemption for 2026 is $15 million per individual — or $30 million for married couples using portability. This was increased under the One Big Beautiful Bill Act (OBBBA) from $13.99 million in 2025. The exemption will be adjusted annually for inflation starting in 2027. Estates with taxable values below this threshold owe zero federal estate tax. The 40% rate applies only to amounts above the exemption.

Portability allows a surviving spouse to use the deceased spouse’s unused federal estate tax exclusion (DSUE). The DSUE is not automatic — the executor must elect it by filing Form 706 within 9 months of death (extendable 6 months). Even if the first spouse’s estate is worth far less than $15M and no tax is owed, filing Form 706 purely to elect portability can save millions of dollars when the surviving spouse’s estate eventually needs the extra shelter. Estates not required to file a Form 706 have up to 5 years from the date of death to make the election under current IRS rules.

For federal purposes, no — but for state purposes, possibly yes. Nineteen states and D.C. impose estate or inheritance taxes with much lower exemptions — Oregon’s is $1 million. If you live in one of these states, even a $3–5M estate can generate a substantial state estate tax bill with zero federal exposure. Additionally, even if your estate is below $15M today, it may not be in 10–20 years after appreciation, inheritance, or business growth. Annual gifting, trust planning, and insurance are still relevant even for estates well below the federal threshold.

A forced sale occurs when heirs must sell illiquid assets — typically a family business or real estate — under time pressure to pay an estate tax bill that is due 9 months after death. Unlike a voluntary sale where you can wait for the right buyer at the right price, a forced sale gives buyers enormous leverage. Studies and practitioner experience consistently show that forced sales of closely held businesses deliver 30–60 cents on the dollar. The solution is liquidity planning in advance — primarily through life insurance held outside the estate in an ILIT, Section 6166 installment elections, or credit lines secured by estate assets.

It depends on who owns the policy. If you own a life insurance policy on your own life at the time of your death — meaning you have the right to change beneficiaries, borrow against the policy, or surrender it — the death benefit is included in your gross estate at full face value. This is one of the most expensive surprises in estate planning. The solution is an Irrevocable Life Insurance Trust (ILIT): the trust, not you, owns the policy. At your death, the proceeds flow to the trust estate-tax-free and can be used to purchase illiquid assets from the estate, providing liquidity without taxation.

Valuation discounts for closely held business interests are legitimate and IRS-recognized — but they must be supported by a qualified appraisal prepared by a certified valuator. The two main discounts are: (1) Lack of Marketability Discount (LOMD) — typically 10–35%, reflecting that a private business interest cannot be sold as quickly or easily as publicly traded stock; and (2) Minority Interest Discount — typically 15–40%, reflecting that a minority owner cannot force a sale or control distributions. These discounts can legally reduce the taxable value of a business interest by 20–45%. The IRS frequently challenges discounts above 30–35% unless backed by a robust, contemporaneous appraisal. This workbench uses a simplified illustrative discount input for planning awareness — actual discounts require professional appraisal.

Section 6166 of the Internal Revenue Code allows estates where more than 35% of the adjusted gross estate consists of a closely held business interest to pay federal estate tax in installments over up to 14 years (a 2-year deferral followed by up to 10 annual installments). This prevents the immediate forced sale of the business. However, there are important limitations: the IRS may require a lien or bond on estate assets; selling or disposing of more than 50% of the business interest triggers immediate acceleration of all deferred tax; and interest on deferred payments is not fully deductible as an estate expense. Section 6166 is a valuable safety valve for business-owner estates — but it is not a substitute for insurance-based liquidity planning.

No — the unlimited marital deduction applies only to transfers to a U.S. citizen spouse. If your spouse is a non-citizen (even a lawful permanent resident), assets passing to that spouse at your death are not eligible for the unlimited marital deduction. Instead, the applicable vehicle is a qualified domestic trust (QDOT), which allows deferral of estate tax on assets transferred to a non-citizen spouse until the surviving non-citizen spouse dies or takes principal distributions. QDOT planning is highly technical — estates with non-citizen spouses should work with an estate attorney experienced in cross-border planning. Note: in 2026, the annual gift exclusion for transfers to a non-citizen spouse is $194,000 — far higher than the standard $19,000 per-recipient limit.

The Generation-Skipping Transfer (GST) tax is a second layer of 40% federal tax imposed on transfers that skip a generation — typically transfers to grandchildren or great-grandchildren, or to unrelated beneficiaries more than 37.5 years younger than the donor. Without the GST tax, wealthy families could avoid estate tax at the children’s generation entirely by leaving assets directly to grandchildren. In 2026, the GST exemption is $15 million per individual — matching the federal estate and gift tax exemption. Married couples have a combined $30 million GST exemption. GST tax can be triggered through direct skips, indirect skips through trusts, or trust terminations when non-skip beneficiaries (such as children) have died. Properly allocating GST exemption to dynasty trust assets at funding is one of the most powerful multigenerational wealth protection strategies available in 2026.

When an heir inherits an asset, the IRS “steps up” the asset’s cost basis to its fair market value on the date of death — erasing all capital gains tax on appreciation that occurred during the deceased owner’s lifetime. For example: if a parent bought stock for $100,000 that grew to $1,200,000 at death, the heir inherits it with a $1,200,000 basis. If sold immediately for $1,200,000, they owe zero capital gains tax. The lifetime gain of $1,100,000 permanently escapes capital gains taxation. This is why estate planners often recommend holding low-basis, highly appreciated assets until death rather than gifting them — lifetime gifts carry the donor’s original basis, creating a taxable gain for the recipient when sold. The step-up applies to all assets included in the taxable estate, including assets held in revocable living trusts. In community property states, both halves of community property receive a stepped-up basis at the first spouse’s death — a major advantage over joint tenancy ownership.

The annual gift tax exclusion allows you to give up to $19,000 per recipient in 2026 — free of gift tax and without reducing your $15 million lifetime exemption. No Form 709 (Gift Tax Return) is required as long as each gift stays at or below $19,000. Married couples can split gifts and give $38,000 per recipient per year — but gift-splitting requires both spouses to consent and file Form 709 to document the election. The long-term power is significant: a couple gifting $38,000 to each of four children and four spouses-in-law removes $304,000 from their estate every single year — $3.04 million over a decade — with zero gift tax or exemption usage. Additionally, direct payments for tuition and medical expenses made directly to the educational institution or medical provider are excluded from gift tax with no dollar cap — and have no impact on the annual exclusion or lifetime exemption. These “superexclusions” are among the most underused estate planning tools available to high-net-worth families.

An Irrevocable Life Insurance Trust (ILIT) is a trust that owns a life insurance policy — removing the death benefit from your taxable estate entirely. Because you don’t own the policy, the proceeds fall outside your gross estate and save 40% federal estate tax on the full face value. The ILIT trustee applies for the policy, pays premiums funded by your annual gift exclusion contributions, and collects the proceeds at your death — then makes them available to purchase illiquid estate assets or make loans to heirs, providing cash to pay estate taxes without a forced sale. Critical rule: if you transfer an existing policy you already own into an ILIT, you must survive at least 3 years from the transfer date — otherwise IRC §2035 pulls the proceeds back into your estate. For maximum protection, have the ILIT apply for and own the new policy from inception. ILITs are the most widely used liquidity tool for business-owner estates with illiquid asset concentrations.

Yes — retirement accounts are fully included in your taxable estate. The full balance of your traditional IRA, 401(k), SEP IRA, or 403(b) is part of your gross estate at death — and beneficiaries also owe income tax on every dollar they withdraw. This creates a double taxation problem: the account value is taxed for estate purposes at up to 40%, and then distributions are taxed again as ordinary income at the beneficiary’s marginal rate. The combined federal tax burden on a large traditional IRA left to a non-spouse beneficiary in a high-income-tax state can exceed 60–70 cents on the dollar. Key planning responses: Roth conversions during life (Roth distributions are income-tax-free to heirs), naming a charity as IRA beneficiary (charities pay no income tax on inherited IRA distributions), and structuring bequests so that lower-taxed assets go to family members while the most heavily taxed assets fund charitable bequests.

A Grantor Retained Annuity Trust (GRAT) is an irrevocable trust where you transfer assets, retain the right to receive fixed annuity payments for a set term (typically 2–10 years), and at the end of the term any remaining value passes to heirs — potentially with zero gift tax. The strategy works because the IRS values your retained annuity using the §7520 hurdle rate (approximately 4–5% in 2026). If your transferred assets grow faster than this rate during the term, the excess appreciation passes to heirs completely gift-tax-free without using any of your $15 million exemption. A “zeroed-out GRAT” sets annuity payments to exactly offset the §7520 hurdle, meaning the taxable gift at funding is essentially zero. The key risk: if you die during the GRAT term, the assets revert to your estate and the strategy fails. Practitioners commonly use short-term 2-year rolling GRATs with high-growth assets (startup equity, concentrated stock positions) to minimize this mortality risk while capturing appreciation.

A dynasty trust (also called a perpetual trust or multigenerational trust) is a long-term irrevocable trust designed to hold assets across multiple generations without triggering estate tax at each generational transfer. With proper GST exemption allocation, assets placed in a dynasty trust avoid estate tax at the children’s, grandchildren’s, and great-grandchildren’s generation — and beyond. States that allow perpetual dynasty trusts include South Dakota, Nevada, Delaware, and Alaska. Assets inside the trust are also protected from beneficiaries’ creditors and divorcing spouses. A couple funding a $30M dynasty trust in 2026 — using both their $15M GST exemptions — shelters all future appreciation from estate and GST tax indefinitely. At a 6% annual growth rate, a $30M dynasty trust grows to approximately $96M over 20 years and $544M over 40 years — none of which would face estate or GST tax as it passes through generations.

You can — but understand the tax consequences carefully. If you give your home to your children during your lifetime, they receive your original cost basis (carryover basis), not a stepped-up basis. If you paid $200,000 for a home worth $1,200,000 today, your children inherit a $200,000 basis — and owe capital gains tax on the entire $1,000,000 gain when they sell. Keep the home until death, and they inherit it at a $1,200,000 stepped-up basis — owing zero capital gains tax on the same sale. A second risk: if you give your home away but continue living in it, the IRS treats it as a retained life interest under IRC §2036 and pulls the full fair market value back into your taxable estate anyway — defeating the strategy entirely. The proper vehicle to transfer your home out of your estate while retaining the right to live in it is a Qualified Personal Residence Trust (QPRT), which transfers future appreciation to heirs at a discounted gift tax cost while preserving your right of occupancy for a fixed term.

A Spousal Lifetime Access Trust (SLAT) is an irrevocable trust funded by one spouse for the benefit of the other — removing assets from the donor spouse’s estate while allowing the beneficiary spouse to access distributions if needed for health, education, maintenance, and support. The donor spouse uses their $15 million lifetime exemption now, locking in today’s exemption amount and removing all future appreciation from both estates permanently. The key advantage: unlike outright gifts, the family does not lose access to the transferred wealth entirely — the beneficiary spouse can still receive distributions. The major risk is the “reciprocal trust doctrine”: if both spouses create SLATs for each other with identical terms simultaneously, the IRS may “uncross” the trusts and pull the assets back into each spouse’s estate. SLATs must differ in meaningful ways — different trustees, different timing, different asset compositions, and different distribution standards — to survive IRS scrutiny. If the beneficiary spouse dies first, the donor spouse loses indirect access to the SLAT assets entirely.

For joint tenancy with right of survivorship (JTWROS) between spouses, exactly 50% of the property is included in the first spouse’s gross estate. For joint tenancy with a non-spouse, 100% is included in the first owner’s estate unless the survivor proves proportional contribution. Community property states — Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin — provide a significant tax advantage: each spouse owns 50% of community property, but both halves receive a full stepped-up basis at the death of the first spouse. This means a married couple in a community property state who owns a home with $2M of built-in gain pays zero capital gains tax when the survivor sells after the first death — compared to a couple in a joint-tenancy state where only the decedent’s 50% gets stepped up, leaving the survivor’s 50% at the original basis. For couples in non-community property states with large appreciated assets, a community property trust may be worth exploring.

The IRS audits a small but meaningful percentage of estate tax returns — and the audit rate rises sharply for large estates and returns with aggressive positions. The most common audit triggers include: (1) Valuation discounts above 30–35% without a contemporaneous qualified appraisal; (2) Family Limited Partnerships (FLPs) with weak or no non-tax business purpose; (3) Inconsistent asset valuations across real estate, art, jewelry, and private business interests; (4) Large prior gifts on Form 709 that are cross-referenced against Form 706; (5) Portability claims with no matching Form 706 from the first spouse; and (6) Very large gross estates above $20 million. The statute of limitations is 3 years from filing Form 706, but can be extended by agreement. Retain all supporting documentation — appraisals, business valuations, gift records — for at least 10 years. Using a qualified estate attorney and CPA who specialize in estate tax return preparation significantly reduces audit risk.

Estate tax is assessed on the deceased person’s estate before distribution — the estate pays the tax from its assets before heirs receive anything. Inheritance tax is assessed on the person who receives the assets — each heir pays tax on what they inherit, at rates that depend on their relationship to the deceased. The federal government imposes only an estate tax — there is no federal inheritance tax. At the state level: 12 states plus D.C. impose a state estate tax (including Massachusetts, Oregon, Washington, New York, and Illinois); 6 states impose an inheritance tax (Iowa, Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania); and Maryland is the only state with both estate and inheritance tax simultaneously. Relationship to the deceased matters enormously for inheritance tax: in most states spouses are fully exempt, children pay reduced rates (4.5% in Pennsylvania), and distant relatives or unrelated heirs pay the highest rates — up to 15–16%. Domicile planning — legally relocating to a no-tax state such as Florida, Texas, or Nevada — is a legitimate estate tax reduction strategy for high-net-worth families willing to establish genuine primary residence.