An estimated $124 trillion will change hands in the United States through 2048 — the largest transfer of wealth in American history. Most of the attention goes to the number. Far less goes to the decisions that shape what families actually keep — and many of those decisions come with deadlines.
Source: Cerulli Associates, U.S. High-Net-Worth and Ultra-High-Net-Worth Markets 2024 — projecting $105 trillion to heirs and $18 trillion to charity through 2048.
Here’s the pattern I see as someone who reads tax returns for a living: the difference between a well-handled inheritance and a poorly-handled one is often less about the estate documents than about decisions most people don’t know they’re making — a conversion window that closed, a distribution taken in a high-income year, a step-up in basis nobody knew to use. For most families, the wealth transfer isn’t lost in probate. It’s lost on the tax return, quietly, a bracket at a time.
Why families hand over more than they have to
Three things, over and over:
- Taxes are treated as an afterthought. The estate documents get done; the tax strategy doesn’t. Very few estates owe federal estate tax under today’s exemption — for most families, the real exposure is income tax on inherited retirement accounts and mistimed sales of appreciated assets, and every one of those carries a decision with a deadline.
- Nobody owns the timing. The attorney drafted the trust years ago. The CPA sees the return after the year is over. The financial advisor has never read the return at all. Each did their job; no one is watching the calendar.
- The rules changed, and most plans didn’t. Under current rules, many non-spouse heirs must empty an inherited IRA within ten years — and if the original owner had already begun required distributions, annual withdrawals are generally required along the way. A lifetime of tax-deferred savings becomes a compressed, and often mistimed, tax bill.
Where you are in the transfer changes what to do
Three readers usually find themselves in this article. Each has different moves, and different deadlines.
If you’re the parent planning the transition
You have the most leverage of anyone in this story — because you control the timing while the assets are still yours.
- Review beneficiary designations. They override your will, and outdated ones are the most common — and most avoidable — wealth-transfer mistake we see.
- Consider Roth conversions during your lower-income retirement years. Paying tax at your bracket now can spare your children paying it at theirs later.
- Know which assets are best to spend, which to gift, and which to leave. Appreciated taxable accounts and retirement accounts follow completely different tax rules at death.
Traditional IRA account owners have considerations to make before performing a Roth IRA conversion. These primarily include income tax consequences on the converted amount in the year of conversion, withdrawal limitations from a Roth IRA, and income limitations for future contributions to a Roth IRA. In addition, if you are required to take a required minimum distribution (RMD) in the year you convert, you must do so before converting to a Roth IRA.
If you’re the adult child helping a parent prepare
This is the conversation most families put off — and the one where a year or two of foresight does the most good.
- Make sure someone — anyone — has looked at your parent’s tax return with the transfer in mind. A low-income year for them is a planning opportunity for the whole family.
- Ask where the accounts are and how they’re titled. Consolidation and correct titling now prevents a scavenger hunt later.
- Get the professionals talking to each other before the transfer, not after. Afterward, most of the decisions are already made.
If you’re the heir who has come into money
The decisions made in the first year determine most of the tax outcome. Slow down — but don’t stall.
- Learn your deadlines before you do anything else. Inherited IRAs, in particular, carry distribution rules where waiting has a real cost — and depending on when the original owner died, annual withdrawals may be required along the way.
- Don’t sell inherited taxable assets reflexively — the step-up in basis may have already done the tax work for you. Know your new basis first.
- Plan the distributions against your own income. Emptying an inherited IRA in your peak earning years, without a strategy, is how a legacy becomes a tax event.
What this looks like when it’s done right
A REAL EXAMPLE
Same IRA. Two very different outcomes.
A client’s mother held a traditional IRA. Her retirement income was modest — which meant her tax bracket was low, and most people would have simply left the account alone.
Instead, we converted the IRA to a Roth over her remaining years, paying tax at her low rates. When our client later inherited it, the account came to him tax-free — in his 50s, at the peak of his earning years, when every distribution from a traditional IRA would have been taxed at his highest bracket.
Same account, same family, same money. The only variable was when the tax was paid — and that one decision saved tens of thousands.
Notice what made that work: someone read the mother’s tax return, saw the low bracket, and recognized it as a window. That’s not exotic planning. It’s coordination — a tax strategy and an investment strategy in the same conversation, before the deadline instead of after it.
This is a hypothetical situation based on real life examples.
The takeaway
Whether you’re on the giving end, the receiving end, or standing in the middle helping a parent through it, the question isn’t whether the wealth will transfer. It’s how much of it will arrive. The families who keep the most aren’t the ones with the most complicated documents — they’re the ones where somebody watched the calendar.
Every family’s situation is different, and the rules described here have exceptions and change over time. This article is general information, not personalized tax or investment advice — before acting on any of it, speak with a qualified professional about your specific circumstances.