Planning your legacy means understanding how the federal estate tax works-and how to keep more of what you've built in your family. This overview explains the federal estate tax exemption, portability between spouses, and practical steps you can take now to reduce future tax friction. If you're weighing options or want a personalized review, contact Heritage Law Office by using our online form or calling 414-253-8500 for legal assistance.
Estate Tax Basics: What It Is and Why It Matters
At a high level, the federal estate tax applies to the value of your taxable estate at death, after subtracting allowable deductions (like debts, administrative expenses, and certain charitable and marital transfers) and your lifetime unified credit (the "exemption"). The estate tax is coordinated with the gift tax and the generation-skipping transfer (GST) tax-three systems designed to tax transfers above certain thresholds, whether given during life or at death.
Key takeaways:
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The estate tax and gift tax share a single, unified lifetime exemption that is indexed annually for inflation.
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The annual gift tax exclusion allows additional tax-free giving each year, separate from the lifetime exemption.
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The GST tax is a separate system with its own lifetime exemption designed to discourage "skipping" a generation.
For a deeper dive into lifetime giving limits and strategies, see our guide on gift tax rules, exemptions, and savings strategies.
The Federal Estate Tax Exemption (And The 2026 "Sunset")
Your estate can pass up to the federal exemption amount free of estate tax. That figure adjusts annually for inflation. Current dollar amounts change year-to-year; what matters most for planning are the rules:
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Annual inflation adjustments. The IRS revises exemption amounts each calendar year.
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Scheduled reduction in 2026. Under current law, the historically high exemption is set to drop roughly in half on January 1, 2026 (often called the "sunset"), unless Congress acts.
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"Use it or lose it"? If the exemption decreases later, properly structured lifetime transfers made while the exemption is higher can lock in the benefit.
Because your facts-and the law-can change, it's prudent to review your plan well before the sunset. We walk through the practical impact in our resource: How do estate taxes affect my estate plan?
Portability: Preserving a Deceased Spouse's Unused Exemption (DSUE)
Portability allows a surviving spouse to add the Deceased Spouse's Unused Exclusion (DSUE) to their own exemption-potentially doubling the amount that can pass estate-tax-free.
How portability works
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Spouse passes away. Determine how much of their exemption was used.
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File an estate tax return (Form 706). Even if no tax is due, the executor must make a timely portability election to preserve DSUE for the survivor.
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Surviving spouse benefits. The survivor can apply the DSUE to lifetime gifts or to their estate at death.
Practical notes
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Don't skip the filing. Families often lose portability simply because no return was filed when the first spouse died.
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Deadlines and relief. There are strict filing deadlines; limited relief may be available if missed.
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Trusts vs. portability. Portability is helpful, but a credit shelter (bypass) trust can still add value-creditor protection, remarriage safeguards, appreciation outside the survivor's estate, and GST planning that portability alone cannot achieve.
GST Tax: Parallel System, Separate Exemption
The generation-skipping transfer (GST) tax applies when wealth skips a generation (for example, from grandparent to grandchild). The GST system has:
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A separate lifetime GST exemption (annually indexed).
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Complex allocation rules-automatic allocation is not always optimal.
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Powerful dynasty-style trust planning opportunities to support long-term family goals.
If multigenerational planning is on your radar, our primer on dynasty trusts-advantages and disadvantages can be a helpful starting point.
Who Should Pay the Closest Attention?
You should speak with an attorney sooner rather than later if any of the following apply:
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Your net worth (including life insurance, retirement accounts, business interests, and real estate) is near today's exemption or could grow to that level.
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You want to lock in a higher exemption before the 2026 sunset.
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You prefer trust-based protections (creditor, remarriage, or blended-family considerations).
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You intend to benefit grandchildren or later generations.
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You hold illiquid or rapidly appreciating assets (closely held business, investment real estate, concentrated stock).
Common Planning Moves to Reduce or Manage Estate Tax Exposure
The best plan is custom-but the building blocks are well-known. Below are strategies we frequently evaluate with clients.
1) Annual Exclusion Gifting (Simple, Flexible, Cumulative)
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Make annual gifts up to the federal exclusion amount per recipient, every year.
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Consider 529 education plans (including "superfunding" with multiple years of exclusion).
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Pair with thoughtful beneficiary designations to keep beneficiary-driven assets aligned with the rest of your plan (see our guide on beneficiary designations).
2) Credit Shelter ("Bypass") Trusts vs. Portability
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A credit shelter trust locks in the first spouse's exemption and shelters future growth from the survivor's taxable estate.
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Portability can complement-not replace-trusts; trusts also support GST aims and non-tax protections.
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Well-drafted AB/ABC structures add flexibility if tax laws or family needs change.
3) Lifetime Transfers That "Use" Today's Higher Exemption
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Larger lifetime gifts to irrevocable trusts can remove appreciating assets from your estate now.
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Consider income-tax tradeoffs: removing assets may forgo a future step-up in basis; sometimes we preserve basis step-up on selected assets and gift the highest-growth assets instead.
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For advanced moves, see our overview of tax-oriented trust strategies.
4) Strategic Charitable Planning
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Charitable bequests can reduce estate tax dollar-for-dollar.
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Donor-Advised Funds (DAFs) and charitable remainder trusts (CRTs) can combine income streams with charitable impact.
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Learn more in our article on charitable giving in estate planning.
5) Life Insurance, ILITs, and Liquidity
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Life insurance can provide liquidity for taxes or equalization among heirs.
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An Irrevocable Life Insurance Trust (ILIT) can keep death benefits outside your taxable estate while preserving control over proceeds.
6) Valuation Discounts & Entity Planning
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Family limited partnerships (FLPs) and LLC structures may support legitimate valuation discounts for lack of control/marketability when transferring minority interests.
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Must be commercially sensible and carefully administered.
7) Residence & Business Transfer Tools
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Qualified Personal Residence Trusts (QPRTs) can shift future home appreciation out of your estate while allowing continued use for a term.
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GRATs can transfer growth over a "hurdle rate" with minimal gift tax cost.
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Early planning is essential for illiquid or volatile assets.
Retirement Accounts, SECURE Act Rules, and Estate Tax
Retirement accounts (IRAs/401(k)s) are income in respect of a decedent (IRD) and do not receive a basis step-up. That means your beneficiaries will face income tax on withdrawals, separate from any estate tax on the account's value. Post-SECURE Act rules generally require faster payouts for many beneficiaries, complicating both tax timing and cash flow.
For coordination tips, see our resources on estate planning for retirement accounts and the impact of the SECURE Act.
Don't Forget the Non-Tax Pillars
Even for families well below the exemption, good planning streamlines administration and reduces the chance of disputes:
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Clear fiduciary selections (executor, trustee, and agents).
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Up-to-date beneficiary designations across all accounts.
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Coordinated revocable living trust and pour-over will to avoid probate complexity and maintain privacy.
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Transparent communication to reduce surprises, confusion, and conflict.
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Thoughtful planning for special assets (family business, vacation home, digital assets).
If you're thinking about broader readiness, you might also like our overview on estate planning 101 and this discussion of whether your children could face taxes on inheritances in various scenarios: Will my kids have to pay taxes on their inheritance?
This material is for general informational purposes and does not constitute legal advice. Always consult an attorney about your specific situation.
Advanced Coordination: Marital Deduction, QTIPs, and Portability
The federal marital deduction lets a decedent transfer unlimited assets to a U.S. citizen spouse without immediate estate tax. That's helpful, but it can also defer tax and squander planning opportunities if everything simply passes outright.
When a QTIP trust makes sense
A QTIP (Qualified Terminable Interest Property) trust can secure the marital deduction while keeping control over ultimate beneficiaries. It also preserves options for portability (the surviving spouse's ability to use the Deceased Spouse's Unused Exclusion, or DSUE) and for credit shelter planning. We often pair QTIPs with "disclaimer" or "Clayton" style flexibility to pivot between trust funding formulas after death when the numbers are clear. If you are weighing a QTIP approach, you may find this overview helpful: QTIP Trust Attorney in Wisconsin.
Basis vs. estate tax tradeoffs. One reason to use QTIPs thoughtfully is the income tax basis dimension-assets in a surviving spouse's estate can receive another step-up in basis at the survivor's death. A pure credit shelter trust prioritizes estate tax minimization and creditor/remarriage safeguards, while a QTIP can preserve step-up potential. The right mix depends on your assets, expected growth, and family goals.
Portability: Deadlines, Mechanics, and Pitfalls
Portability is powerful-but procedural.
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Election required. To claim DSUE, the executor of the first spouse's estate must file Form 706 and elect portability, even if no tax is due.
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Timing. The return is generally due nine months after death, with a six-month extension available if you file for it on time.
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Late relief. Under current IRS procedures, there may be simplified late election relief for certain smaller estates that missed the deadline.
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Ordering rule. For lifetime gifts made by the surviving spouse, the DSUE is used before the survivor's own basic exclusion-a subtle point that can shape gift timing.
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"Last deceased spouse" rule. DSUE attaches to the most recently deceased spouse. Remarriage can shift which spouse's DSUE is available, so the sequence of events matters.
If your spouse died in a prior year and no election was made, act promptly to evaluate whether relief is available. This is especially important for families considering significant lifetime gifts or those near the 2026 exemption reduction.
Business Owners and Real Estate: Liquidity and Leverage
Estate tax is ultimately a liquidity problem. If your wealth is concentrated in a closely held business or investment real estate, planning early can avert forced sales at the worst possible time.
Tools we often evaluate:
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Buy-sell agreements with funding (including insurance) to create marketable liquidity.
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Recapitalizations (voting/non-voting) to facilitate gradual transfers and protect control.
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Family entities to centralize governance and, when appropriate, reflect minority interest and marketability realities in valuations. See our primer on family limited partnerships and this broader look at limited partnerships.
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Section 6166 deferral (for estates with qualifying closely held business interests) to pay estate tax over time-but only if you satisfy technical eligibility and compliance.
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Professional appraisals and audit-ready records to support positions taken.
Life Insurance: Funding Taxes and Equalizing Heirs
Life insurance is not a tax strategy by itself-but it's often the cheapest liquidity when your estate includes hard-to-sell assets. An Irrevocable Life Insurance Trust (ILIT) can own the policy to keep proceeds outside your taxable estate and to control distributions for heirs. Read more here: What is a Life Insurance Trust and How Can It Benefit Me? and our service page: ILIT Attorney in Wisconsin.
Pro tip: Coordinate beneficiary designations and policy ownership carefully. Even small titling mistakes can undermine the plan. A quick refresher is here: Beneficiary Designations.
Grantor Trusts, Sales, and GRATs (Advanced)
For families open to advanced planning, grantor-style trusts can shift appreciation out of the taxable estate while preserving income tax flexibility.
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Sales to intentionally defective grantor trusts (IDGTs) can move future growth to heirs while the grantor pays the income tax-an indirect "tax-free" gift.
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Swap powers allow you to "exchange" low-basis trust assets for high-basis personal assets later, aiming to maximize basis step-up at death.
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GRATs (Grantor Retained Annuity Trusts) can transfer upside above a low "hurdle rate" with little or no gift tax value. Learn more here: Advantages and Disadvantages of GRATs.
These tools are powerful, technical, and fact-dependent. They work best with a multi-year runway, professional valuations, and consistent administration.
Charitable Bequests, DAFs, and CRTs
Charitable planning can reduce estate tax and align with your values.
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Outright bequests reduce your taxable estate dollar-for-dollar.
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Donor-Advised Funds (DAFs) streamline giving during life and at death.
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Charitable Remainder Trusts (CRTs) can provide an income stream to you or a loved one and a remainder to charity, with both income-tax and estate-tax angles to consider.
A deeper dive is here: Charitable Giving in Estate Planning.
The "2026 Sunset": A Practical Action Plan
With the scheduled reduction of the federal exemption on January 1, 2026, we're helping many families sequence their moves. Here's a practical, tax-sensitive cadence:
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Inventory and Estimate. Gather a net worth snapshot (include beneficiary-designated assets, insurance, and business interests). Tag potential high-growth assets.
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Stress-Test With Ranges. Model both current and post-sunset exemption levels. Decide whether to pre-fund trusts to "lock in" today's higher exemption.
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Pick the Vehicle(s). For growth assets with volatility, consider GRATs or IDGT sales; for long-term control/creditor aims, lean toward discretionary irrevocable trusts; for simplicity, use annual exclusion gifting.
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Address Liquidity. Confirm cash sources (including ILIT-owned coverage) for tax and administration costs.
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Finalize the Will/Trust Set. Ensure your revocable trust, pour-over will, powers of attorney, and beneficiary designations are aligned.
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Execute and Fund. Signing is not the finish line-fund the plan, retitle accounts/real estate, and document valuations. See: Trust Administration.
Common Mistakes That Cost Families
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Missing the portability election after the first spouse's death.
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Failing to fund the revocable trust or to retitle assets as intended.
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Overlooking beneficiary designations on retirement accounts and insurance.
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Ignoring basis planning, leaving heirs with large, avoidable capital gains.
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Waiting too long to plan for illiquid estates, forcing rushed sales.
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DIY documents that don't coordinate with complex assets or family dynamics.
A Quick Diagnostic: Are You at Risk for Estate Tax?
You may want a focused estate tax consult if any of these resonate:
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Your combined assets-including life insurance-could exceed the post-sunset exemption.
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You have concentrated or closely held assets (business, real estate, restricted stock).
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You support multiple generations and want to include GST-aware trusts.
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You're comfortable with lifetime transfers to "lock in" today's higher exemption.
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You need liquidity planning to protect a business or legacy asset.
What to Bring to an Estate Tax Planning Meeting
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A current asset and liability list with approximate values and owners/beneficiaries.
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Copies of your estate planning documents (wills, trusts, powers of attorney).
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Insurance summaries (policy type, owner, insured, beneficiary, cash value, death benefit).
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Entity documents for any business interests (operating agreements, shareholder agreements).
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Your top goals (family support, philanthropy, tax efficiency, asset protection).
Contact an Attorney for Estate Tax Planning
Thoughtful estate tax planning safeguards your family and your life's work. If you'd like a tailored, plain-English plan that fits your assets and values, Heritage Law Office can help. Contact us by either using the online form or calling 414-253-8500 for legal assistance.
This material is for general informational purposes and does not constitute legal advice. Always consult an attorney about your specific situation.
Frequently Asked Questions (FAQs)
1. What is the federal estate tax exemption, and does it change every year?
The federal estate tax exemption is the amount you can transfer at death (combined with your lifetime taxable gifts) without triggering federal estate tax. It's indexed for inflation and typically adjusts each calendar year. Under current law, the historically elevated exemption is scheduled to decrease on January 1, 2026, unless Congress acts. Because amounts change, wise planning focuses on rules and structure-then updates your documents as numbers evolve.
2. How does portability work between spouses, and what's required to claim it?
Portability lets a surviving spouse add the deceased spouse's unused exclusion (DSUE) to the survivor's own exemption. To preserve it, the executor of the first spouse's estate must file a timely Form 706 and elect portability-even if no tax is due. Relief may be available if the deadline was missed, but it's far simpler (and safer) to file on time so the survivor can use the DSUE for lifetime gifts or at death.
3. If I make lifetime gifts, will that cause "clawback" if the exemption later goes down?
Generally, no. Properly structured lifetime transfers that use the higher exemption available at the time of the gift are not retroactively penalized if the exemption is lower when you pass away. In other words, many families can "lock in" today's higher amounts through lifetime gifting. That said, gift planning should still weigh income-tax basis, asset selection, cash flow, and administrative complexity before moving forward.
4. What's the difference between estate tax, inheritance tax, and capital gains tax for heirs?
The federal estate tax is assessed on the decedent's taxable estate. Some states impose estate or inheritance taxes with different thresholds and rules. Capital gains tax is separate: appreciated assets you own at death may receive a basis adjustment, potentially reducing future gains for heirs; however, retirement accounts are generally income-taxable to beneficiaries when withdrawn. Your plan should account for all three buckets so your heirs aren't surprised.
5. Do I still need trusts if portability is available?
Often, yes. Portability helps with estate tax thresholds, but trusts can add benefits portability can't: creditor protection, remarriage safeguards, control over ultimate beneficiaries, multi-generational (GST-aware) planning, and the ability to shift future appreciation outside the survivor's taxable estate. Many couples pair credit shelter trusts or QTIPs with portability to balance tax efficiency with practical protections.