A $100,000 inheritance is not taxed as federal income, and in most states no inheritance tax applies to it either. Deciding what to do with a $100,000 inheritance comes down to a short sequence: confirm the tax picture, keep the money legally and practically separate until you have a plan, wipe out high-interest debt, set aside an emergency reserve, and put the rest into tax-advantaged retirement accounts and a diversified brokerage account. The order matters more than the specific investments you eventually choose.
Will You Owe Tax on the $100,000
Cash received as an inheritance is not taxable income on your federal return. The federal government taxes estates, not heirs, and only estates above the basic exclusion amount owe anything. For 2026 that threshold is $15,000,000 per person, so a $100,000 inheritance sits far below the line, and any estate tax the estate itself owed would have been paid before the money reached you.1Internal Revenue Service. Whats New – Estate and Gift Tax
Five states impose a separate inheritance tax that the recipient pays: Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania. Iowa repealed its inheritance tax effective January 1, 2025. Rates in the remaining five range from 0% to 16% depending on your relationship to the person who died. Spouses are exempt everywhere, close relatives typically pay lower rates or nothing, and distant or unrelated beneficiaries pay the most. If you or the decedent had ties to one of these states, check that state’s rate schedule for your relationship category.
If the inheritance includes stocks, real estate, or other appreciated property rather than cash, the tax basis resets to the fair market value on the date of death.2Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent You owe capital gains only on appreciation after that date, and any sale is treated as long-term regardless of how briefly you held the asset.3GovInfo. 26 USC 1223 – Holding Period of Property Keep documentation of the date-of-death value; you’ll need it when you file.
If the Money Is in an Inherited Retirement Account, Treat It Differently
Inherited traditional IRAs and 401(k)s are the one big federal exception. The original owner never paid income tax on that money, so every dollar you withdraw is taxed as ordinary income, and there is no step-up in basis. How quickly you must empty the account depends on your relationship to the person who died.
Most non-spouse beneficiaries fall under the 10-year rule and must withdraw the entire balance by December 31 of the year containing the 10th anniversary of the owner’s death.4Internal Revenue Service. Publication 590-B, Distributions From Individual Retirement Arrangements (IRAs) Whether you also need to take annual withdrawals within that window depends on whether the original owner had already reached their required beginning date for distributions. Exceptions apply to surviving spouses, minor children of the decedent, disabled or chronically ill beneficiaries, and anyone no more than 10 years younger than the decedent.
Spreading withdrawals across the 10 years usually beats taking the balance at once. Pulling roughly $10,000 a year keeps far more of the money in a lower tax bracket than a single $100,000 distribution would.
Missing a required distribution triggers a 25% excise tax on the amount you should have withdrawn. Correcting the shortfall within two years drops the penalty to 10%.5Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs Put the deadlines on a calendar.
Protect the Money Before You Spend Any of It
A few decisions in the first weeks can quietly cost you more than any investment choice later.
Keep It Separate From Marital Funds
In most states, an inheritance is separate property, belonging to you alone rather than to both spouses. That protection can vanish if you deposit the money into a joint account, use it to pay joint expenses, or otherwise blend it with marital funds. Commingling can convert separate property into marital property subject to division in a divorce. The clean approach is to open an individual account in your name only and leave the funds there until you have a plan. If you later use part of the money for something shared, like a down payment on a jointly owned home, document exactly how much came from the inheritance.
Check How It Affects Any Government Benefits
Depositing $100,000 into a standard account can immediately disqualify you from means-tested programs. Supplemental Security Income has a resource limit of $2,000 for individuals and $3,000 for couples in 2026.6Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet Medicaid eligibility can also be affected in states that impose asset tests.
If you or a family member with a qualifying disability receives SSI or Medicaid, an ABLE (Achieving a Better Life Experience) account can shelter up to $100,000 from the SSI resource count, though contributions are capped at $19,000 per year for 2026.7Social Security Administration. Spotlight on Achieving a Better Life Experience (ABLE) Accounts A special needs trust is another option to discuss with an attorney before the money touches any account.
An inheritance can also affect federal student aid. The FAFSA counts a dependent student’s assets at 20% and a parent’s assets at roughly 5.6% when calculating the Student Aid Index. If someone in the household is approaching college, whose name the money sits in makes a real difference.
Watch FDIC Limits
If you plan to park the full amount at one bank while you decide what to do, confirm the total balance stays within FDIC insurance limits. The FDIC insures up to $250,000 per depositor, per bank, for each ownership category.8FDIC. Understanding Deposit Insurance If existing balances plus the inheritance would push you over that ceiling at a single institution, split the funds.
Pay Off High-Interest Debt First
Using part of the inheritance to eliminate high-interest debt is one of the most reliable moves you can make. A credit card at 20% is costing you more than any conservative investment will earn, so paying it off produces an immediate, guaranteed return equal to the rate you were paying. Work from the highest interest rate down.
When you close out a balance, ask the lender for the “payoff” amount rather than making a normal payment. The payoff figure includes accrued interest through the expected payment date, so you don’t leave a small residual balance that keeps generating charges. After the payment clears, request written confirmation that the account is paid in full at a zero balance. That letter protects you if the debt is later reported incorrectly.
Set Aside an Emergency Fund
Before any of the money goes into long-term investments, set aside three to six months of living expenses in a liquid account. A high-yield savings account is a straightforward place to hold that reserve along with anything you expect to need in the next year or two. As of early 2026, top high-yield savings accounts are paying annual percentage yields in the 4% to 5% range. Opening one typically requires your Social Security number, a government ID, and an initial deposit, with transfers arriving within one to two business days.
Invest the Rest
What’s left after debt payoff and the emergency fund is what does the long-term work.
Route Money Into a 401(k) Indirectly
You can’t deposit inheritance money directly into a 401(k), because contributions have to come through payroll. What you can do is temporarily raise your payroll deduction toward the maximum and use the inheritance to cover the resulting gap in your paycheck. For 2026, the employee contribution limit is $24,500. Workers 50 and older can add $8,000 in catch-up contributions, and those between ages 60 and 63 qualify for an enhanced catch-up of $11,250.9Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
Fund an IRA
You can contribute up to $7,500 to an IRA for 2026, plus $1,100 more if you’re 50 or older. The contribution can go in as a lump sum any time before the tax filing deadline. For a Roth IRA, contribution ability phases out between $153,000 and $168,000 for single filers and between $242,000 and $252,000 for married couples filing jointly.9Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Your IRA contribution also cannot exceed your taxable compensation for the year, so you need earned income at least equal to the contribution.10Internal Revenue Service. Retirement Topics – IRA Contribution Limits
Open a Taxable Brokerage Account
Anything left after maxing out tax-advantaged accounts can go into a standard brokerage account. Opening one requires your Social Security number, and the institution collects your tax identification for reporting.11Internal Revenue Service. About Form W-9, Request for Taxpayer Identification Number and Certification Most brokerages let you complete the process online and fund the account by electronic transfer. Cash typically settles in one to two business days, after which you can buy index funds, ETFs, or other investments. A diversified, low-cost index fund portfolio is a common starting point for someone investing a lump sum for the first time.
Update Your Own Estate Plan
A $100,000 jump in net worth is a good reason to review your own documents. If you have a will, check that it still reflects how you want your assets distributed; changes can be made through a codicil for a will or through a trust amendment. For every new account you open with the inheritance, complete a beneficiary designation form with the institution. Accounts with a named beneficiary pass directly to that person and bypass probate. While you’re at it, review beneficiary designations on existing accounts, because marriage, divorce, or a new child may have made yours outdated.
Store the updated documents somewhere secure, such as a safe deposit box or a rated home safe, and make sure your executor or a trusted family member knows where to find them. An encrypted digital backup adds a second layer of protection.