A bank deposit is money you hold at a bank under an account agreement (for example, a checking account or a time deposit). On the bank’s balance sheet, deposits are liabilities because the bank owes depositors their money.
Economically, a deposit is best understood as a claim on the bank that is usable for payments (for transaction accounts) and as a key building block of the modern money-and-banking system.
Core Mechanics
A deposit relationship shows up as a simple balance-sheet identity:
- Bank assets include reserves, loans, and securities.
- Bank liabilities include deposits and other funding.
If a customer deposits $1,000 in cash and the bank keeps it as reserves, a stylized balance-sheet change is:
- Assets: +$1,000 reserves
- Liabilities: +$1,000 deposits
If the bank later makes a $900 loan and credits the borrower’s account, it typically creates a deposit at the same time (subject to capital, liquidity, and risk constraints). That is one reason deposits matter for macroeconomics: bank balance sheets can expand and contract with credit conditions.
Types Of Deposits
Deposits differ mainly by liquidity and term:
- Transaction deposits (for example, checking accounts) are meant for payments and are withdrawable on demand.
- Savings deposits usually pay some interest but may limit transaction types or frequency.
- Time deposits lock funds until a maturity date in exchange for a higher promised rate.
Why Deposits Matter
Deposits sit at the intersection of micro-level household finance and macro-level financial stability:
- Payments and settlement: deposits are the everyday money most people use.
- Bank funding and lending: stable deposits make it easier for banks to fund loans.
- Runs and liquidity risk: if many depositors withdraw at once, even a solvent bank can face liquidity stress.
- Policy design: deposit insurance and liquidity regulation are designed to reduce run risk, but can create incentives for banks to take risk (moral hazard) if not paired with strong supervision.
Practical Example
Two accounts can both be “deposits” but behave differently in stress:
- A checking account provides immediate payment access, so it is more likely to be withdrawn quickly during uncertainty.
- A time deposit reduces run dynamics by contract (withdrawal penalties and maturity), but depositors may still refuse to roll over at maturity if they worry about the bank.