Demand Deposit Definition, Account Types, and Requirements

What Is a Demand Deposit?

A demand deposit account (DDA) is a bank account from which deposited funds can be withdrawn at any time, without advance notice. DDA accounts can pay interest on the deposited funds but aren’t required to. Checking accounts and savings accounts are common types of DDAs.

How Demand Deposits Work

If depositors were required to notify their banks in advance before withdrawing funds, it would be quite a challenge to obtain cash or make ordinary transactions. Demand deposit accounts are intended to provide ready money—the funds that people need to make a purchase or pay bills.

The account's holdings can be accessed at any time, without prior notice to the institution. The account holder simply walks up to the teller or the ATM—or, increasingly, goes online—and withdraws the sum they need. As long as the account has that amount, the institution has to give it to them. The money is available "on-demand"—hence, the name "demand deposit" for this sort of account.

Demand deposit accounts, which typically are offered by banks and credit unions, are in contrast to investment accounts offered by brokerages and financial services firms. While the funds in those type of accounts may be invested in highly liquid assets, the account holder still must notify the institution that they wish to withdraw money. Depending on the asset in question, it may take a day or two for the investments to be sold and the cash to be available.

"DDA" can also mean direct debit authorization, which is a withdrawal from an account for purchasing a good or service. It's what happens when you use a debit card. But it's fundamentally the same concept: The money is immediately available, drawn on the linked account, for your use.

Special Considerations

Demand deposit accounts (DDAs) may have joint owners. Both owners must sign when opening the account, but only one owner must sign when closing the account. Either owner may deposit or withdraw funds and sign checks without permission from the other owner.

Some banks require minimum balances for demand deposit accounts. Accounts falling below the minimum value typically are assessed a fee each time the balance drops below the required value. However, many banks now offer no monthly fees and no minimum balances. 

Types of Demand Deposit Accounts (DDAs) 

DDAs are primarily checking accounts, but they can include savings accounts as well. Money market accounts (MMAs) are a bit of a gray area: Some financial authorities classify them as DDAs, some don't.

As of early July 2024, the total amount of demand deposit accounts in the U.S.—officially, the total demand deposits component of M1—was $5.287 trillion. This compares with $1.646 trillion five years ago and $1.073 trillion 10 years ago.

Requirements for Demand Deposits

The key requirements of DDAs are no limitations on withdrawals or transfers, no set maturity or lockup period, funds accessible on-demand, and no eligibility requirements. 

The payment of interest and the amount of interest on the DDA are up to the individual institution. Once upon a time, banks couldn't pay interest on certain demand deposit accounts. For example, the Federal Reserve Board's Regulation Q (Req Q), enacted in 1933, specifically prohibited banks from paying interest on checking account deposits.

Many banks got around that rule via negotiable order of withdrawal (NOW) accounts, checking accounts with a temporary holding period on funds, which allowed them to actually pay some interest. Reg Q was repealed in 2011.

Still, DDAs tend to pay relatively low interest rates (on savings accounts) or no interest at all (as is often the case with checking accounts, Reg Q's repeal notwithstanding). They may also charge various fees for handling the account.

Demand Deposit vs. Term Deposit

A demand deposit account and a term deposit account are both types of financial accounts offered by banks and credit unions. But they differ in accessibility or liquidity, and in the amount of interest that can be earned on the deposited funds.

Basically, a DDA allows funds to be accessed any time, while a term deposit account—also known as a time deposit account—restricts access to funds for a predetermined period. Funds can't be withdrawn from a term deposit account until the end of that term without incurring a financial penalty, and withdrawals often require written notice in advance.

The most familiar type of term deposit account is the certificate of deposit (CD). You buy the CD for a set term or time period—a certain number of months or years—and you generally don't touch it until the term is up. It sits in a special account, earning interest at a fixed rate.

That's basically the trade-off: In return for the ability to access your funds on demand, your money earns less in a DDA. The time deposit pays more, in compensation for its lack of liquidity.

Where do money market accounts (MMAs) fit into the equation? They're a hybrid. They let account-holders deposit and withdraw funds on demand and they typically pay market interest rates (which fluctuate). However, they might not be as on-demand as regular demand deposit accounts. Some banks may limit the per-month withdrawals or other transactions (like transfers) on MMA accounts. Fees may apply if the limit is exceeded.

The Bottom Line

Offered by banks and credit unions, demand deposit accounts allow you to deposit and withdraw funds immediately, whenever you want—"on-demand," in effect. The financial institution can't require advance notice or charge a fee for letting you access the funds. DDAs are ideal for frequent or everyday needs. DDAs usually take the form of checking or savings accounts.

The main drawback of DDAs is that they offer little or no interest on the money in them. That's the price you pay for the funds being readily available.