Most people picture the estate tax when they think about inheritance. For the great majority of families, that tax will never apply — in 2026 it only reaches estates above $15 million for an individual, $30 million for a couple. The threats that actually reach ordinary families are quieter: the income tax on inherited retirement accounts, and paperwork mistakes that send money to the wrong person or trap it in court. The good news is that both are fixable, and neither requires an estate large enough to owe estate tax. It requires deciding on purpose rather than by default.
Your retirement accounts, life insurance policies, and any account marked payable-on-death pass directly to whoever is named on their beneficiary forms — no matter what your will says. A will that leaves everything to your current spouse cannot redirect an IRA whose form still names an ex-spouse from decades ago. This is one of the most common and most painful mistakes in estate planning, because it stays invisible until the moment it can no longer be fixed.
Beneficiary forms also decide how smoothly money moves. Assets that pass by beneficiary designation skip probate — the court process that can take months, becomes public record, and carries fees. No hour of planning pays off better than pulling up every account and policy and confirming, in writing, who is named on each — including a contingent beneficiary in case the first has died.
A dollar left to an heir is not simply a dollar. What they owe in tax depends entirely on which account it came from — two identical estates can hand children wildly different amounts of spendable money, purely from the account mix. Here’s what an heir keeps from each kind of account:
| Account left to heirs | What the heir owes in tax | The catch — or the gift |
|---|---|---|
| Traditional IRA / 401(k) | Ordinary income tax on every dollar | Must be emptied within 10 years — often landing in the heir's peak earning years |
| Roth IRA | Nothing (if the account was open 5+ years) | Still emptied within 10 years, but the growth stays tax-free |
| Life insurance death benefit | Nothing | Passes income-tax-free, outside probate, directly to the named beneficiary |
| Taxable brokerage account | Tax only on growth after the date of death | The step-up in basis erases the gain built up during the owner's life |
| Cash & bank accounts | Nothing on the principal | Already taxed; it simply passes to the heir |
A traditional retirement account is the most heavily taxed inheritance; a Roth, a life insurance benefit, and a stepped-up taxable account are the lightest. Two identical estates can hand heirs very different amounts of spendable money, purely from the account mix.
| The heir | How long to withdraw | What it means |
|---|---|---|
| A surviving spouse | Can treat the account as their own | The most flexible option; withdrawals can wait for years |
| An eligible designated beneficiary | Over their own lifetime | A minor child of the owner, a disabled or chronically ill heir, or one not more than ten years younger |
| Most other heirs | Within ten years | The standard rule for adult children and other non-spouse heirs |
| A successor beneficiary | Only the time left on the first clock | Inherits an already-inherited account, with no fresh ten years |
The category is set by the heir's relationship to the person who died. The rule and its exceptions appear in IRS Publication 590-B.
The account most people accumulate the most in — the traditional IRA or 401(k) — is the worst kind of money to leave, and since 2019 the law forces most adult children to empty it within ten years. The best kinds are the mirror image: a Roth and a life insurance benefit arrive entirely income-tax-free. That’s why Roth conversions and permanent life insurance, covered in our Tax Planning and Wealth Protection and Transfer pages, are also legacy tools: they turn the worst inheritance into the best, with the tax paid once at your rate instead of ten times at your children’s.
Underneath the tax questions sits plain paperwork that protects a family more than any elaborate strategy. A will directs whatever doesn’t pass by beneficiary form, names your executor, and — for parents of minor children — names a guardian. Many households add a revocable living trust, which passes assets at death without probate, keeping the transfer private and quick. And two documents matter while you’re still living: a durable power of attorney, naming someone to manage money if you can’t, and a healthcare power of attorney with an advance directive, naming someone to make medical decisions and recording your wishes. Without them, your family may have to go to court just to gain the authority to help — at the worst possible moment to be filing paperwork.
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Legacy planning is lifetime tax planning carried one step further. The same levers that lower the tax on a withdrawal or a conversion also decide how much of what remains reaches the next generation intact. This page is drawn from Chapter 15 of our book Don’t Run Out — the full chapter covers the ten-year rule’s exceptions, the step-up in basis, annual gifting, and when a trust protects an heir.
Want to see how your accounts would actually pass — and what your heirs would keep? Start with the 9 questions every retirement plan should answer.
Not legal advice: Goat Planning is not a law firm. For complex estates, blended families, or heirs with special circumstances, consult a qualified estate attorney — we’re glad to work alongside yours.