Yes, you can leave money to your grandchildren, and the best way to do it depends on how much you have, when you want to transfer it, and how much control you want to maintain over the inheritance. The most common methods—direct bequests through your will, trusts, 529 education savings plans, and custodial accounts—each offer different tax advantages and protections.
For example, a grandparent with $500,000 to leave might put $200,000 in a 529 plan for college costs, establish a trust for $250,000, and leave $50,000 directly to each grandchild through their will, which allows the assets to grow with different timelines and purposes in mind. The key challenge isn’t whether you can leave money—it’s how to structure it so your grandchildren actually benefit, taxes don’t consume a large portion, and the money serves your actual goals rather than creating problems. Many grandparents discover too late that a straightforward inheritance leaves their grandchildren unprepared to manage sudden wealth, or that tax consequences eat into what they intended to pass down.
Table of Contents
- What Are Your Options for Leaving Money to Grandchildren?
- The Tax Implications You Need to Understand Before You Transfer Wealth
- Using Trusts to Control How Your Grandchildren Access the Money
- 529 Plans—The Tax-Efficient Path for Education Goals
- Avoiding Common Mistakes When Naming Grandchildren as Beneficiaries
- Custodial Accounts and Simpler Structures for Smaller Amounts
- Planning for Inflation and Generational Wealth—What Grandchildren Actually Need
- Conclusion
- Frequently Asked Questions
What Are Your Options for Leaving Money to Grandchildren?
The primary vehicles for leaving money to grandchildren are direct bequests through a will or trust, tax-advantaged education savings accounts, family trusts with specific terms, and life insurance with grandchildren named as beneficiaries. Each approach works differently in terms of timing, tax treatment, and control. A direct bequest through your will goes to probate, which takes months and costs money in legal and court fees, while money left through a trust passes outside probate and reaches your grandchildren more quickly—typically within weeks rather than a year or more.
You can also use 529 education savings plans, which allow you to contribute up to $18,000 per person per year without gift tax consequences in 2024, and the money grows tax-free if used for college, trade school, or now private K-12 education. Some grandparents use this as their primary strategy, maxing out contributions for multiple grandchildren and allowing years of compound growth. Another option is a Roth IRA conversion strategy where you leave your Roth IRA directly to grandchildren—they inherit the tax-free growth without the income tax bite that comes with traditional retirement accounts.
The Tax Implications You Need to Understand Before You Transfer Wealth
The federal gift and estate tax exemption in 2024 allows you to leave up to $13.61 million to anyone—including grandchildren—during your lifetime or at death without owing federal estate tax. However, this exemption expires at the end of 2025 and is set to drop to roughly $7 million per person in 2026, which means timing matters significantly if you have substantial assets. Many grandparents assume they’re too small to worry about estate tax, but state-level estate taxes hit much lower thresholds: Massachusetts and Oregon, for example, tax estates above $1 million.
One major tax pitfall is the “kiddie tax” for very young beneficiaries. If you leave money to grandchildren under 18 (or under 24 if they’re in school full-time and don’t support themselves), investment income over a certain amount is taxed at the parents’ tax rate, not the grandchild’s lower rate. This can cost you thousands in unnecessary taxes. Additionally, leaving money directly to a minor grandchild through your will creates legal complications: the court appoints a guardian, money gets tied up in administration, and the grandchild receives full control at age 18, often before they’re ready.
Using Trusts to Control How Your Grandchildren Access the Money
A trust gives you control after you’re gone. Rather than money passing directly to a grandchild at age 18, a trust lets you specify that they receive money at age 25, or in installments at ages 25, 30, and 35. It also allows you to protect assets if your grandchild struggles with spending, faces a divorce, or becomes vulnerable to creditors. For example, a grandparent who leaves $200,000 directly to a 19-year-old grandchild risks seeing the money spent on an expensive car or poor investments within months, while the same amount in a trust might be structured to give the grandchild $5,000 per year until they turn 30, then a lump sum—with a trustee deciding whether to accelerate payments for education, medical needs, or emergencies.
The downside is cost and complexity. Setting up a proper trust typically costs $1,500 to $3,000 upfront, and annual trustee fees (if you hire a professional trustee rather than naming a family member) run $1,000 to $2,500 annually depending on the trust’s size. You also sacrifice the simplicity of a direct bequest—a trust requires ongoing paperwork, tax filings, and management. For smaller estates under $100,000, the overhead often isn’t worth it, and a simpler approach like a Uniform Transfers to Minors Account (UTMA) or UGMA works better.
529 Plans—The Tax-Efficient Path for Education Goals
A 529 plan is one of the most powerful tools for leaving education money to grandchildren because contributions grow tax-free and withdrawals are tax-free when used for qualified education expenses. In 2024, you can contribute up to $18,000 per year per beneficiary with no gift tax, or $36,000 if you’re married and split the gift. Better yet, a new 2024 rule allows unused 529 balance to roll over to a Roth IRA in the beneficiary’s name, meaning money you set aside for education but your grandchild doesn’t use for college can still grow tax-free for retirement.
The trade-off is that 529 plans are restricted to education. If your grandchild receives a sports scholarship or decides not to go to college, withdrawals for non-qualified expenses come out with income tax plus a 10% penalty. A grandchild who gets into a fully-funded military academy or becomes a successful tradesperson might see a 529 as a trap, not a gift. You can change the beneficiary to another grandchild, which solves this problem in some families, but it requires advance planning and clear communication.
Avoiding Common Mistakes When Naming Grandchildren as Beneficiaries
One frequent error is naming minor grandchildren directly as beneficiaries on retirement accounts like IRAs or 401(k)s. When you die, the grandchild (or their parent, if they’re very young) must take distributions over their lifetime under the new SECURE Act rules, which can create a significant tax burden and forces them to report income even if they’re too young to file returns. A better approach is to name a trust as the beneficiary, which gives you control over when and how distributions happen and avoids this forced income acceleration.
Another mistake is failing to update beneficiary designations after life changes. A grandparent who named grandchildren as beneficiaries on a life insurance policy 20 years ago and then went through a divorce might have ex-in-law relatives still listed or outdated percentages that don’t reflect current wishes. Review all beneficiary designations—on insurance policies, retirement accounts, and payable-on-death accounts—every 3-5 years or after major life events. This is free to do and takes an hour, but skipping it can lead to money going to the wrong people or creating years of family conflict.
Custodial Accounts and Simpler Structures for Smaller Amounts
If you want to leave a modest amount—say $10,000 to $50,000—to a grandchild, an UTMA or UGMA custodial account is often simpler than a trust. You name a custodian (often a parent) who manages the money until the grandchild reaches the age of majority (18 or 21, depending on the state).
Custodial accounts have minimal setup costs, no ongoing trustee fees, and the money transfers automatically when the beneficiary comes of age. The drawback is that at age 18 or 21, the grandchild gets full control with no restrictions or guidance. If you want to ensure the money is used for college rather than a vacation, or you want the grandchild to receive money in stages, a custodial account won’t give you that flexibility.
Planning for Inflation and Generational Wealth—What Grandchildren Actually Need
Money you leave today may not go as far when your grandchildren are adults. If you have $100,000 to leave a grandchild who is currently 10 years old, that could be worth only $65,000 in today’s dollars by the time they’re 30, assuming 3% average inflation. This means your goal should focus not just on the amount, but on creating systems that let the inheritance grow.
A 529 plan or trust structured to invest in growth assets (stocks rather than cash) helps combat inflation naturally. Forward-looking families are also considering what their grandchildren actually need: not just a lump sum, but financial literacy, clear communication about family values, and assets structured for real goals like education, homeownership, or starting a business. Some grandparents are leaving not just money, but a letter explaining their values, how the money should be used, and what matters to them—this context often adds more value than the dollars themselves.
Conclusion
Leaving money to your grandchildren is straightforward in concept but requires attention to structure, taxes, and the grandchildren’s readiness to receive it. The best approach combines multiple strategies: perhaps a 529 plan for education, a trust for larger amounts with terms that protect the grandchild and reflect your values, and direct bequests for smaller gifts that don’t need complex management.
Start by assessing how much you have to leave, clarifying your goals for how it should be used, and consulting with an estate planning attorney to structure your will and any trusts. Revisit your plan every few years as your circumstances and tax laws change. The cost of getting this right—typically $1,000 to $3,000 in legal fees—is far less than the cost of leaving your family confused, your money tangled in probate, or your grandchildren unprepared to receive what you intended.
Frequently Asked Questions
Can I leave money to a grandchild under 18 directly through my will?
Technically yes, but it’s not recommended. The money will be tied up in probate, a court-appointed guardian will manage it, and your grandchild gets full control at age 18, often too young to handle a significant inheritance responsibly. A trust, custodial account, or other structured approach is better.
Will my grandchild have to pay taxes on money I leave them?
Generally no—inheritances are not income to the beneficiary. However, investment income generated after they inherit the money is taxable. If you leave them a retirement account like an IRA, they’ll owe income tax on distributions. This is why naming a trust as the beneficiary of retirement accounts can be helpful.
How much money can I give my grandchildren without owing gift tax?
You can give up to $18,000 per person per year (in 2024) with no gift tax. Married couples can give $36,000. Any amount beyond these limits counts against your lifetime federal exemption of $13.61 million (in 2024), though this exemption drops significantly in 2026.
Should I invest 529 money in stocks or bonds?
It depends on the grandchild’s age. If college is 10+ years away, stocks offer better long-term growth. As the grandchild gets closer to college age, gradually shift to bonds and cash to reduce volatility in years when you might need the money.
What happens if my grandchild gets a full scholarship and doesn’t need the 529 money?
As of 2024, up to $35,000 in unused 529 funds can roll into a Roth IRA in the grandchild’s name, allowing it to grow tax-free for retirement. You can also transfer the 529 to another grandchild’s education.
Can I change my trust after I set it up?
This depends on the type of trust. Revocable trusts can be changed or revoked during your lifetime. Irrevocable trusts generally cannot be changed, though you can amend some of them under certain circumstances. Always confirm the type with your attorney before assuming you can make changes later.