Single, Joint and Business Accounts: How Coverage Is Counted

Which of these are you?

• You share an account with a spouse, partner or parent. Jump to the owner-by-owner count. The number that matters is your share across all joint accounts at the bank, not the balance of any one account.
• You and one other person each have more than one joint account, with different people. This is where the shortcuts fail. The three-owner example below shows a $150,000 gap between the rule and the FDIC calculator's result when owner names are left blank, and none when you enter them.
• You run a business, an LLC or a sole proprietorship. The entity type decides whether the money gets its own $250,000 or lands in your personal single account.
• A bank you use was acquired, or an account holder has died. Both events have six-month rules.

How does the FDIC decide which bucket an account lands in?

The FDIC insures deposits by right and capacity, bank by bank. Deposits held in the same right and capacity at one insured bank are added together. Deposits held in different capacities, such as single and joint, are insured separately (12 CFR 330.3(a)). Separately chartered banks are separate too, even when affiliated, but branches of one bank are not (12 CFR 330.3(b)).

Two things follow from that sentence, and the rest of the chapter is applying them. First, you are counting people, not accounts. An account is only a container; what the FDIC adds up is each owner's interest in each container. Second, the count restarts at every separately chartered bank and every ownership category, and the standard maximum deposit insurance amount (the SMDIA) is the ceiling for each pool. The SMDIA is $250,000, adjustable under the statute the rule cites, and defined at 12 CFR 330.1(o).

How are single accounts counted?

A person's single accounts at one bank are added together and insured up to $250,000, whatever number of accounts or branches they sit in. The rule is 12 CFR 330.6(a). The wrinkle is the exception: if more than one natural person can withdraw from an account held in one name, the FDIC treats it as a joint account unless the bank's records clearly show that the other signers merely act for the owner. Someone with only a power of attorney is not counted for this purpose.

Three other single-ownership cases come up often.

• Sole proprietorships. Money in a business account of a sole proprietorship is treated as the owner's individual account and added to the owner's other single accounts (12 CFR 330.6(b)). A sole proprietorship is defined as a business in which one person owns all the assets (12 CFR 330.1(n)).
• Community property in one name. Community property funds in the name of one spouse are treated as that spouse's single account (12 CFR 330.6(c)).
• Estates. Funds in a decedent's name, or held by an executor or administrator, are added together and insured to the SMDIA, separately from the personal accounts of the executor and the heirs (12 CFR 330.6(d)). The six-month rule for deceased owners is below.

What makes a joint account qualify, and how is it counted?

A qualifying joint account must meet three tests: every co-owner is a natural person, each co-owner personally signed a signature card (electronic signing counts) or the bank's records otherwise show co-ownership, and each co-owner has withdrawal rights on the same basis (12 CFR 330.9(c)(1), (c)(4)). Once it qualifies, each owner's share of every such account at the bank is added and insured up to $250,000 (12 CFR 330.9(b)).

The signature-card test has two softenings. It does not apply to certificates of deposit, negotiable instruments, or accounts kept by an agent, nominee, guardian, custodian or conservator for two or more people (12 CFR 330.9(c)(2)). And records showing that the bank issued an access mechanism to each owner, or that each owner used the account, can stand in for the card (12 CFR 330.9(c)(4)). Two or more names on the card are strong evidence the account is joint, though not necessarily a qualifying one (12 CFR 330.9(c)(3)).

An account that fails the test is not lost. It is treated as owned by each named owner individually, and each owner's interest is added to that owner's other accounts of the same kind (12 CFR 330.9(d)). The usual cause is an owner that is not a natural person, such as a company or a trust, sharing a name on an account with a person.

Shares are equal where the rule speaks to the question: for tenants in common the interests are deemed equal unless the bank's account records say otherwise, and the conjunction "and" or "or" in the title makes no difference (12 CFR 330.9(e)). Where the records show unequal shares, the records govern, and you should ask the bank how yours are recorded.

Joint coverage is insured separately from each co-owner's single accounts at the same bank (12 CFR 330.9(a)). That is the source of the familiar "two owners, $500,000" shortcut. It is true for one account with two equal owners. It is not a property of the account.

Worked case: three owners, three accounts

The regulation's own example shows the counting, and the figures here are the rule's. A and B share an account of $150,000. A and C share one of $200,000. A, B and C share one of $375,000. Equal shares give each owner a slice of each account.

Total deposits are $725,000 and $50,000 is uninsured. The overage belongs to A because A sits in all three accounts. No single account is over a limit that you could see by looking at its balance, which is why the exposure goes unnoticed.

Parent and adult child

A parent and an adult child share a $400,000 account at Bank A in equal shares, and the parent also holds $150,000 alone there. Each owner holds $200,000 in the joint account, the parent's single account is a different category, and all $550,000 is insured. Now add a second joint account of $300,000 between the parent and the parent's spouse, and enlarge the first to $700,000 for the example.

Under the rule, $350,000 of the $1,000,000 is uninsured and $650,000 is insured. Judged account by account, $700,000 against a $500,000 two-owner total is $200,000 over and $300,000 is under, so $200,000 looks uninsured. The count is by owner, and the parent's two shares collide, which makes it $350,000.

What does the FDIC calculator do with different co-owner sets?

The FDIC coverage calculator on this site lets you name the owners of each account. When you do, it counts joint accounts owner by owner under 12 CFR 330.9(b): each person's share of every joint account at one bank is added together and insured up to $250,000. Single accounts are counted per named owner. When you leave the names blank, it falls back to grouping joint accounts by the number of co-owners, so two accounts with the same co-owner count merge into one bucket with a single limit of $250,000 times the count. That fallback is the conservative choice, but it can overstate what is uninsured when the sets of owners differ.

For the second row with names left blank, the calculator puts $1,000,000 into one two-owner bucket with a $500,000 limit and flags $500,000. The rule's answer is $350,000. Enter the owners (for example Parent, Child on the first account and Parent, Spouse on the second) and the calculator returns the rule's $350,000. The blank-name gap is $150,000 and runs in the safe direction, so name your owners for the exact count. The calculator assumes equal shares on joint accounts, does not test whether a joint account qualifies, and does not model public units, employee benefit plans or the husband-and-wife community property rule. The FDIC's own EDIE tool works from the bank's actual records.

The last row shows how interest changes the picture. The FDIC counts the principal and interest credited, plus the ascertainable interest accrued to the date the bank defaults (12 CFR 330.3(i)(1)). A joint CD of $490,000 that has accrued $14,000 is $504,000, which is $4,000 above the two-owner total of $500,000. Chapter 4 of the Liquidity Guidebook covers keeping a cushion under the line.

How are business, LLC and partnership accounts counted?

A corporation, partnership or unincorporated association that carries on an independent activity gets its own coverage at each bank: all its accounts are added together and insured up to $250,000, separate from the owners' own accounts (12 CFR 330.11(a) to (c)). The FDIC's consumer brochure lists S corporations, limited liability companies and professional corporations in the corporation category.

"Independent activity" is defined at 12 CFR 330.1(g): the entity is operated primarily for some purpose other than to increase deposit insurance. An entity that fails the test is not treated as an entity at all: its deposits are attributed to the owners and added to each owner's individual accounts (12 CFR 330.11(d)). Do not read the rule as a recipe. A shell with no activity does not get its own pool, and the test turns on what the entity does.

Three cases show the stakes. All three use hypothetical balances at one bank.

The first two rows show why the legal form matters to the count: the same $400,000 is $150,000 over the limit for a sole proprietor and fully insured when an LLC holds half. The third shows that a large operating balance is not helped by the owner's personal limit. Entity coverage is per entity, so it is also per bank: splitting a $600,000 entity balance equally across two separately chartered banks insures $500,000 and leaves $100,000.

Employee-benefit, public-unit and fiduciary accounts have their own sections, and some business accounts held for others fall under the pass-through rules instead of an entity category. Those are outside the screening model. See chapter 3 of this series for pass-through and the Liquidity chapter on how safe your bank is.

What do the six-month rules change?

Two events leave your coverage unchanged for six months: a bank merger, and the death of a deposit owner.

Mergers. When another insured bank assumes a bank's deposits, the assumed deposits stay separately insured from the acquirer's deposits for six months from the date the assumption takes effect, or, for a time deposit, until its earliest maturity after the six months (12 CFR 330.4(b)). If a CD matures within the six months and is renewed at the same dollar amount and the same term, the separate insurance applies to the renewal until the first maturity after the six months. A CD renewed on any other basis, or one that is not renewed and becomes a demand deposit, is separately insured only to the end of the six months.

The arithmetic shows why you should look for the date. A saver with $250,000 in single accounts at each of two banks is fully insured. After the two banks combine, the same saver holds $500,000 in one bank and one category, so $250,000 sits above the limit once the window closes. The fix is to move the extra amount to a different bank or a different category before the window ends.

Death of an owner. The death of a deposit owner does not change coverage for six months, unless the account is restructured, and the grace period never results in a reduction of coverage (12 CFR 330.3(j)). After six months, insurance follows actual ownership. The current text of this paragraph shows an amendment entry dated March 23, 2026, so read it on eCFR rather than relying on a summary if an account is in this situation. The FDIC brochure describes it as insuring a deceased person's accounts as if the person were alive for six months.

What does this look like when you apply it to your own accounts?

List every account at each bank on one sheet, and write the owners beside each. Then total by person, by capacity, by bank.

1. Single. Add all accounts in your name alone, plus any sole-proprietorship accounts and any single-name account where another person can withdraw and the records do not call that person an agent.
2. Joint. For each co-owner, add their share of every qualifying joint account. Use equal shares unless the bank's records say otherwise.
3. Entity. Add all accounts of each separate entity that has its own independent activity.
4. Compare each total with $250,000. The exposure is each total's excess.
5. Check the dates. Note any merger or death in the past six months, and any CD that accrues enough interest to cross a line.

The same sheet carries forward to the capstone chapter, which turns it into a one-page plan. Trust, payable-on-death and retirement accounts add three more categories to it, and the next chapter takes them on.

For ranked product lists, our best joint checking accounts guide covers the account features, and joint versus separate checking after marriage covers whether to combine money at all. Neither changes how the FDIC counts the balance.