The safest places to deposit a large sum of money are federally insured bank or credit union accounts, U.S. Treasury securities, and brokerage cash management accounts that sweep funds across a network of insured banks. The number that governs almost every decision is $250,000: that is the maximum the FDIC (or the NCUA, for credit unions) insures per depositor, per institution, per ownership category.1FDIC. Deposit Insurance FAQs Anything above that figure at a single bank needs to be structured correctly before you deposit, not after.
Why $250,000 Is the Number That Matters
Every dollar in an FDIC-insured bank or NCUA-insured credit union is protected up to $250,000 per depositor, per institution, per ownership category. That coverage applies to checking, savings, money market deposit accounts, and certificates of deposit. It does not cover stocks, bonds, or mutual funds held through the same bank.
The “per ownership category” piece is what lets a household insure more than $250,000 at one bank. A single person with one bank gets $250,000. A married couple at the same bank can reach $1,000,000 by holding three accounts: an individual account in each spouse’s name ($250,000 each) and a joint account ($250,000 per co-owner, so $500,000 together).2eCFR. 12 CFR Part 330 – Deposit Insurance Coverage Each category is insured independently, so the joint account does not eat into coverage on the individual accounts.
Revocable trust accounts, including payable-on-death accounts, expand coverage further. Each unique beneficiary adds $250,000 of coverage per trust owner, capped at $1,250,000 when five or more beneficiaries are named.3FDIC. Trust Accounts The actual split of money among beneficiaries does not affect the math; only the number of eligible beneficiaries counts.
Before depositing anywhere, confirm the institution is actually federally insured. The FDIC’s BankFind tool searches by name or website URL; the NCUA has a similar lookup for credit unions. Some online fintech platforms are not themselves banks and partner with insured institutions behind the scenes, so the real coverage structure is not always obvious from the app.4FDIC. Enhanced FDIC Tool Helps Consumers Identify Unfamiliar Banks and Websites
How to Insure More Than $250,000 at One Bank
You can split the money yourself across four or five banks, but that creates a record-keeping problem. Deposit placement services solve it. The most widely used is the IntraFi network, which runs ICS (for savings and money market deposits) and CDARS (for certificates of deposit). You deposit at one participating bank, and the network automatically divides your funds into chunks under $250,000 and places each chunk at a different member bank. You hold a single relationship, get one statement, and every dollar stays insured.5IntraFi. ICS and CDARS The network includes thousands of banks, so multi-million-dollar deposits can sit fully covered. Ask your bank whether it participates in IntraFi or a comparable program.
Brokerage cash management accounts work on the same principle from a different starting point. Major brokerages sweep idle cash into a network of partner banks, each holding less than $250,000 for you, while you interact with one login. These accounts typically come with check writing, a debit card, and electronic transfers, which makes them a good holding spot if you expect to invest the windfall eventually. If the brokerage itself fails rather than a partner bank, the Securities Investor Protection Corporation covers up to $500,000 per customer, with a $250,000 sub-limit on cash; SIPC is about recovering assets from a failed brokerage, not insuring against investment losses.6SIPC. What SIPC Protects
High-Yield Savings Accounts
A high-yield savings account is the default home for money you need to keep liquid. In early 2026, the best accounts offered annual percentage yields of roughly 4% to 5%, well above the national average for standard savings.7Forbes Advisor. 10 Best High-Yield Savings Accounts Of March 2026 Up to 5.00% APY Rates track the federal funds rate, which sat at 3.50% to 3.75% after the Federal Reserve’s January 2026 meeting. If the Fed cuts further, savings yields drift down with it.
Most of the top rates come from online banks. The old federal cap of six withdrawals per month on savings accounts was permanently deleted by the Federal Reserve in 2020, though some banks still enforce their own internal limits.8Federal Reserve Board. Federal Reserve Board Announces Interim Final Rule to Delete the Six-Per-Month Limit on Convenient Transfers From the Savings Deposit Definition in Regulation D Check the terms. The main limitation is still the $250,000 cap. Parking $500,000 in a single high-yield savings account leaves half your money uninsured.
Money Market Deposit Accounts
Money market deposit accounts sit between savings and checking. Yields are usually competitive with high-yield savings, and the account typically allows some check writing or debit card access. These are bank products, insured to $250,000 like any other deposit.
Do not confuse them with money market mutual funds. The deposit account is FDIC-insured. The mutual fund is a securities product with no FDIC coverage. When a bank or brokerage offers a “money market” option, ask which one it is before you fund it.
Certificates of Deposit
A CD locks your money at a fixed rate for a set term, from a few months to five years or longer. You give up access in exchange for a rate that holds regardless of what the Fed does afterward. Predictability is the appeal.
The cost is the early withdrawal penalty. Federal law sets only a floor: pull money out within six days of depositing and you owe at least seven days of simple interest.9HelpWithMyBank.gov. What Are the Penalties for Withdrawing Money Early From a Certificate of Deposit Beyond that, banks set their own terms. Three to six months of interest is common for shorter CDs; longer terms sometimes carry a year or more of interest as a penalty. Read the agreement before signing.
A CD ladder softens the liquidity problem. Instead of locking $200,000 into one five-year CD, split it into equal portions across staggered maturities. As each one comes due, you reinvest or spend it. You get periodic access to chunks of money while still earning the longer-term rate on the back end. CDARS can run this across multiple banks for you if your total exceeds the insurance cap at one institution.
Treasury Bills and Notes
Lending directly to the federal government is about as safe as it gets. Treasuries are backed by the full faith and credit of the United States, so you are not relying on any bank’s solvency or any insurance fund’s reserves. You buy them with no fees through TreasuryDirect.gov.
Treasury Bills mature in one year or less, with terms from 4 weeks to 52 weeks. Treasury Notes mature over 2, 3, 5, 7, or 10 years.10TreasuryDirect. About Treasury Marketable Securities Bills are sold at a discount and pay face value at maturity; Notes pay interest every six months at a fixed coupon.11TreasuryDirect. Understanding Pricing and Interest Rates The noncompetitive bidding limit is $10 million per auction per individual, so even very large sums can be deployed at once.12TreasuryDirect. How Auctions Work Treasury interest is exempt from state and local income tax, which gives Treasuries a small edge in high-tax states. There is no $250,000 cap and nothing to spread across institutions.
Credit unions deserve one line here: they are insured by the NCUA on identical terms ($250,000 per member, per institution, per ownership category), and often pay slightly better rates on savings products and CDs because profits go back to members.13NCUA. Share Insurance Coverage Membership is usually tied to a geography, employer, or affiliated group.
A Sensible Split for a Windfall
Most people with a large sum are better off using several of these tools together than picking one. A workable default: keep three to six months of expenses in a high-yield savings account for immediate access, build a CD ladder with the portion you will not need for a year or more, and hold the rest in short-term Treasury bills while you work out a longer-term plan. Deposit placement networks let you do most of this through a single bank without blowing through insurance limits. The yield differences between these options are modest. The difference between insured and uninsured is not.
If Any of It Arrives as Cash
Banks must file a Currency Transaction Report for any cash deposit, withdrawal, or exchange over $10,000.14Office of the Law Revision Counsel. 31 USC Ch. 53 Monetary Transactions The bank handles the paperwork; you do nothing special, and the report is not an accusation.
What creates real legal exposure is trying to dodge the report by breaking the deposit into smaller pieces. Splitting $30,000 into three $9,500 deposits to stay under the threshold is “structuring,” and it is a federal crime punishable by up to five years in prison, even if the money is completely legitimate. If the structuring is part of a pattern involving more than $100,000 in a twelve-month period, the maximum rises to ten years.15Office of the Law Revision Counsel. 31 USC 5324 Structuring Transactions to Evade Reporting Requirement Prohibited Banks also file Suspicious Activity Reports independently and without notifying you when patterns look like evasion.16eCFR. 12 CFR 208.62 Suspicious Activity Reports If the money is legitimate, deposit it normally and let the bank file whatever it needs to file.
Taxes on the Deposit and the Interest
Depositing the money is not itself a taxable event, but the source of the windfall and the interest it earns both matter.
Inheritances are generally not taxable income to the beneficiary under federal law, though any income the inherited assets later produce is taxable. Legal settlements are more complicated: compensation for physical injuries or physical sickness is tax-free under Section 104 of the Internal Revenue Code, while emotional distress alone, punitive damages, and interest on the judgment are fully taxable. Home sale proceeds may be partially or fully excluded under separate rules. Resolve the source question before you start earning interest, because the answer changes how much money you actually have.
Any bank that pays you $10 or more in interest during the year sends a Form 1099-INT and reports that amount to the IRS.17Internal Revenue Service. About Form 1099-INT, Interest Income If your money sits at several banks, you get several 1099-INTs, and every dollar of that interest is taxable federally. Treasury interest is taxable federally but exempt at the state and local level. Once a large deposit starts throwing off thousands of dollars in annual interest, quarterly estimated tax payments may be necessary to avoid an underpayment penalty, which often surprises people whose taxes used to be fully withheld from a paycheck.