What to do with a windfall

The best first move with a windfall is to slow down. Put the money somewhere safe in your own name, such as an FDIC-insured account (insured to $250,000 per bank), a money market fund or Treasury bills. Then work out the tax before you spend or invest any of it: lottery prizes are withheld at 24% and bonuses at 22%, while the top federal rate in 2026 is 37%. Most windfall mistakes come from acting in the first few months. A one-time plan from a fee-only planner costs a median $2,000 and is often all you need.

The first 90 days

1. Park it. If it’s more than $250,000, spread the cash across banks or hold it in Treasury bills. Keep it out of the stock market until you have a plan.
2. Keep it quiet. Tell the people you’d trust with a decision, not everyone you know. Requests for loans and investment pitches start fast.
3. Set the tax aside. Move an estimate of what you’ll owe into a separate account now. More on how much below.
4. Make no permanent decisions. No new house, no paying off the mortgage, no gifts or loans to family yet. All of these can still happen in three months.
5. Write down what you want it to do. Retire sooner, work less, pay for college, help parents. The plan comes from that list.

If the money came from someone’s death, our guide to what to do with an inheritance covers inherited IRAs and the reset in cost basis. If it came from selling a company, see advisors for selling a business.

How each kind of windfall is taxed

State income tax comes on top of most of these, and state rules on prizes and settlements vary.

Mind the withholding gap

The amount withheld is rarely the amount you owe. In 2026 the 37% bracket starts at $640,600 of taxable income for single filers and $768,700 for joint filers. On a $1 million prize the payer withholds $240,000 at 24%, but for a single filer most of the prize is taxed at 35% and 37%, so a large balance is still due when you file.

You can avoid an underpayment penalty without paying everything up front. The IRS generally doesn’t charge one if your withholding and estimated payments this year cover at least 90% of this year’s tax, or 100% of last year’s, whichever is smaller. If last year’s adjusted gross income was over $150,000, the prior-year figure is 110%. Hit that mark and the rest isn’t due until the filing deadline. Keep it in Treasury bills until then; don’t invest money you owe the IRS.

The order that usually works

1. High-interest debt. Credit cards and personal loans first.
2. A real emergency fund. Six to twelve months of spending, held in cash.
3. Tax-advantaged accounts you’re not filling. In 2026: $24,500 in a 401(k), plus catch-ups from age 50; $7,500 in an IRA, plus $1,100 from age 50; and an HSA up to $4,400 for self-only coverage or $8,750 for family coverage, if you have a qualifying health plan.
4. Your list of goals, each with an amount and a date.
5. Then investing the rest, often in stages over months rather than all on one day, so the decision doesn’t hinge on one week’s market.

Giving to family is fine once the plan holds up. In 2026 you can give up to $19,000 per person per year without filing a gift tax return; larger gifts need a return, but no gift tax is due unless your lifetime total passes the $15 million exemption. For large charitable gifts, a donor-advised fund lets you take the deduction in the windfall year and choose charities later.

Common mistakes

• Spending the withheld amount as if it were the tax. It’s a down payment on the tax.
• Paying off a low-rate mortgage on day one. It may be right, but it’s hard to undo and leaves you with less cash.
• Lending to family without terms. Decide in advance whether it’s a gift or a loan, and write it down.
• Putting it all in one investment, especially one a friend or the person who called first is selling.
• Assuming the windfall changes your income for good. A one-time sum funds a few goals, not a permanent raise in spending.
• Forgetting your estate plan. Update your will and beneficiary designations once your net worth changes.

Questions to ask an advisor

1. How many clients have you helped with a windfall like mine?
2. How much tax will I owe beyond what was withheld, and when is it due?
3. What would you do in the first 90 days, and what would you leave alone?
4. Would you charge me a flat fee for a plan, or a share of the money?
5. Do you or your firm earn anything from the products you recommend?

When a fee-only advisor is worth it, and what it costs

A planner earns the fee when the windfall is large compared with your savings, when its tax is complicated (a prize, a settlement, equity, an inherited IRA), or when it changes when you can retire.

Compare those with a percentage fee. At the median 1% of assets, managing a $1 million windfall costs $10,000 a year, every year, based on that median rate. That can be worth it if you want someone to run the money for good. If you’ll carry out a plan yourself, a one-time plan costs a fraction of that. See what an advisor costs on $1 million and what flat-fee advisors charge.

A fee-only planner is paid only by you, so the advice on what to buy isn’t tied to a commission. Check any advisor on the SEC’s adviser search before you move money.

Where to look

Start with advisors for high earners or mid-life transitions, and the advisors for high earners list. For a one-time plan, browse flat-fee advisors. The tax planning specialty fits a prize or settlement, and the estate planning and family wealth transfer specialties fit a windfall large enough to pass on. Very large sums may fit advisors for ultra high net worth households.