Account Balance

An account balance is the amount of money, or other value, held in an account at a particular moment after all credits and debits have been applied. In everyday banking it is the figure a customer sees for a current or savings account. In accounting it is the net total of an entry in the general ledger. On a blockchain it is the quantity of coins or tokens linked to an address.

A single account can show more than one balance. Banks separate the ledger or book balance from the available balance that can actually be spent, and accountants distinguish a debit balance from a credit balance depending on the account type. Understanding which figure is being shown avoids many disputes and overdrafts.

Think of a balance as the running total in a notebook. Every time money comes in you add it, every time money goes out you subtract it, and the number at the bottom of the page is your balance. If you write in pencil the cheque you have just posted, that amount is not really gone yet, but you would be wise to treat it as spent.

Banks keep two totals for the same reason. One shows everything recorded so far; the other shows what you can safely use right now, after allowing for payments still on their way in or out.

A bank account statement or app can show several figures:

• Ledger or current balance. All transactions posted up to the end of the last processing cycle.
• Available balance. The ledger balance minus pending card payments and any hold placed on deposits, plus any agreed overdraft, if the bank includes it.
• Collected balance. Funds that have actually cleared from the paying bank, also called cleared funds.
• Statement balance. The figure at the statement date, used on credit cards to set the amount due.
• Average daily balance. The mean over a period, often used to calculate interest or fees, including whether an account met a minimum balance.

If outgoing payments exceed the available balance, the account may go into overdraft or the payment may be declined.

In double-entry bookkeeping every account carries a balance equal to the difference between its total debits and total credits. Asset and expense accounts normally show debit balances, while liability, equity and revenue accounts normally show credit balances, a pattern known as the normal account balance. At the end of a period accountants list every balance in a trial balance to check that debits equal credits before preparing financial statements. A company's cash balance in its own books rarely matches its bank's figure on the same day, so finance teams run a bank reconciliation to explain the gap, typically caused by deposits in transit, outstanding cheques and bank charges.

Crypto networks record balances in two main ways. Account-based chains such as Ethereum keep a running balance for each address, similar to a bank ledger. Bitcoin uses unspent transaction outputs: a wallet's balance is the sum of the separate coin "pieces" it controls, and spending one creates new outputs, including change returned to the sender. Anyone can look up an address's balance with a block explorer, because the ledger is public. A balance shown on a custodial exchange, by contrast, is an entry in the exchange's internal database, a claim on the firm rather than coins held directly on-chain.

Differences between balances usually come from timing. Card authorisations reduce the available balance at once but settle days later, cheque deposits may be held while they clear, and payments made after a bank's cut-off time post on the next business day. Errors, fraud and failed payments can also leave a balance wrong until corrected. For businesses, relying on the wrong figure can cause failed supplier payments or overdraft fees. For crypto users, confusing an exchange balance with on-chain holdings has caused losses when platforms failed, which is why many treat only self-custodied coins as fully their own.