Debits and Credits Explained: A Beginner’s Guide

Debits and credits are the two sides of every entry in double-entry accounting. A debit is recorded on the left of an account and a credit on the right. Whether either entry increases or decreases a balance depends on the type of account involved—it does not simply depend on whether cash comes in or goes out.

This guide explains the rules, shows how they connect to the accounting equation and works through practical entries a beginner can check. If you want to develop the subject through structured study, explore OHSC’s accounting and finance courses.

What Are Debits and Credits?

In a ledger or T-account, a debit appears on the left and a credit appears on the right. These labels identify where an amount is recorded; they do not mean “good” and “bad”, and neither one always means an increase.

The effect depends on the account category:

• Assets and expenses normally increase with debits and decrease with credits.
• Liabilities, equity and income normally increase with credits and decrease with debits.

That distinction is the safest starting point. Shortcuts such as “debit means money in” quickly fail: paying rent reduces cash with a credit but increases rent expense with a debit.

The Accounting Equation Behind Every Entry

The accounting equation is:

Assets = Liabilities + Equity

Assets are resources controlled by the business. Liabilities are present obligations, while equity is the residual interest after liabilities are deducted from assets. Every correctly recorded transaction keeps the equation in balance.

For day-to-day entries, income increases equity and expenses reduce it. This is why income normally carries a credit balance and expenses normally carry a debit balance. Owner withdrawals or drawings also reduce equity and normally have a debit balance.

Debit and Credit Rules by Account Type

Use this reference table to decide which side of an account to use. “Normal balance” means the side on which that account would ordinarily hold a positive balance.

A memory aid—and its limit

One common aid is DEAD CLIC: Debits increase Drawings, Expenses and Assets; Credits increase Liabilities, Income and Capital. It can help with recall, but understanding the account type and transaction is more reliable than memorising initials alone.

How Double-Entry Bookkeeping Works

Double-entry bookkeeping records each transaction in at least two accounts. The total debits in an entry must equal the total credits. An entry may contain one debit and one credit, or several of each, provided both totals agree.

The process is straightforward:

• Identify what happened in economic terms—not merely which bank button was pressed.
• Identify every account affected and classify each as an asset, liability, equity, income or expense account.
• Decide whether each account increased or decreased.
• Apply the account-type rules and confirm that total debits equal total credits.
• Retain the invoice, receipt, bank record or other source document supporting the entry.

Journal Entry Examples

Journal entries record transactions chronologically before amounts are posted to ledger accounts. The following examples use a small service business and exclude VAT and other taxes so that the double-entry principle remains clear. Actual tax treatment depends on the transaction and jurisdiction.

1. The owner introduces £10,000 cash

Debit Cash £10,000; credit Owner’s capital £10,000. Cash, an asset, increases. The owner’s interest in the business also increases.

2. The business buys equipment for £2,400 cash

Debit Equipment £2,400; credit Cash £2,400. One asset increases while another asset decreases.

3. Supplies costing £600 are bought on credit

Debit Supplies £600; credit Accounts payable £600. An asset increases and a liability to the supplier is created.

4. Services worth £1,500 are invoiced to a customer

Debit Accounts receivable £1,500; credit Service income £1,500. The customer owes the business, and income is recognised.

5. The customer later pays £750

Debit Cash £750; credit Accounts receivable £750. This changes the form of the asset; it does not create a second £750 of income.

6. The business pays £800 rent

Debit Rent expense £800; credit Cash £800. The expense increases and cash decreases.

7. The business pays a supplier £400

Debit Accounts payable £400; credit Cash £400. The payment reduces both the liability and cash.

8. The business receives a £5,000 bank loan

Debit Cash £5,000; credit Bank loan payable £5,000. Cash increases, but so does the amount owed. The receipt is not income.

Worked Example: From Transaction to Balanced Records

Suppose a new consultancy completes three transactions: the owner introduces £4,000, the business pays £900 for a laptop, and it earns £600 in cash from a client. The entries are:

After these entries, cash is £3,700 (£4,000 − £900 + £600), equipment is £900 and total assets are £4,600. Equity also totals £4,600: £4,000 of owner’s capital plus £600 of income. The accounting equation remains balanced.

T-Accounts and the Trial Balance

A T-account is a visual representation of a ledger account. Debits appear on the left and credits on the right. Posting entries to T-accounts makes it easier to see movements and calculate each closing balance.

A trial balance then lists the closing debit and credit balances from the ledger. Its debit and credit columns should total the same amount. Equal totals show arithmetical balance, but they do not prove that every entry is correct. A transaction could be omitted, recorded twice or posted to the wrong account and the trial balance might still agree.

Why a Bank Credit Can Feel Backwards

Bank statements often cause confusion. Money paid into your bank account may appear as a credit because the statement is presented from the bank’s perspective: the bank owes that balance to you, so your deposit increases the bank’s liability. In your own books, the same deposit normally debits the cash-at-bank asset account.

Similarly, a debit card is named for the effect on the cardholder’s bank balance, not because every purchase is recorded as a debit in the buyer’s accounts. A card purchase usually credits cash at bank and debits the asset or expense acquired.

Common Beginner Mistakes

Treating debit as plus and credit as minus

Both can increase or decrease balances. Classify the account first.

Recording only the bank side

Every entry needs an equal opposite side. A payment might reduce cash and reduce a liability, acquire an asset or recognise an expense.

Recognising income twice

An invoice may recognise income before cash is collected. Collection later reduces receivables; it does not repeat the income.

Treating a loan as income

Borrowed cash creates a liability. Loan principal is not income, although related interest may be an expense.

Treating equipment as an immediate everyday expense

Long-lived equipment is ordinarily recorded as an asset initially; subsequent depreciation treatment depends on the applicable accounting and tax rules.

Using the wrong date or period

The transaction date and the basis of accounting affect when income and expenses are recognised.

Ignoring VAT or other taxes

Tax components may require separate accounts. Use the rules that apply to the business and seek professional advice where needed.

Assuming balanced totals mean the entry is right

Equal debits and credits can still contain the wrong accounts, amounts or dates. Review source evidence as well as arithmetic.

A Quick Decision Checklist

What exactly did the business receive, give, earn, incur or become obliged to pay?

Which accounts changed?

What type of account is each one?

Did each account increase or decrease?

Which side does the account-type rule require?

Do total debits equal total credits?

Does the entry agree with the supporting document and applicable accounting policy?

Learning Debits and Credits in Context

Debits and credits become easier when practised as part of the full bookkeeping cycle: source documents, journals, ledgers, trial balance and financial statements. Beginners can compare structured options in OHSC’s bookkeeping qualifications collection or review the Bookkeeping Course Online page for extended study.

If you are deciding which discipline suits your interests, the OHSC guide to bookkeeping and accounting differences compares their respective functions. Learners seeking introductory access can instead browse free online accounting courses. Free study and paid programmes are separate options; check the relevant course page for its current access, assessment and certificate details.

Frequently Asked Questions

What is the simplest definition of a debit and a credit?

A debit is an entry on the left of an account; a credit is an entry on the right. Their effect depends on the account type.

Do debits always increase an account?

No. Debits increase assets, expenses and drawings, but reduce liabilities, equity and income.

Do credits always mean money received?

No. Credits can increase income, liabilities or equity, or reduce assets and expenses. Receiving loan proceeds, for example, debits cash and credits a liability.

Can one transaction have more than two entries?

Yes. A compound entry can contain several debits or credits, provided total debits equal total credits.

What is a normal balance?

It is the side—debit or credit—on which an account normally holds a positive balance. Assets and expenses normally have debit balances; liabilities, equity and income normally have credit balances.

Why must total debits equal total credits?

Double entry records both sides of the same economic event. Equal totals preserve the accounting equation and provide an arithmetical control over the records.

Does accounting software remove the need to understand these rules?

Software can automate posting, but users still need to choose or review accounts, interpret exceptions and recognise incorrect classifications.

Summary

Debit and credit describe the left and right sides of an account. Assets, expenses and drawings increase with debits; liabilities, equity and income increase with credits. Each transaction must produce equal total debits and credits, and the selected accounts must reflect what actually happened. With those principles in place, journal entries become a logical classification exercise rather than a list of rules to guess.

Important: This article is for general educational purposes. Accounting, tax and reporting requirements vary by entity and jurisdiction. For decisions affecting a real business, consult an appropriately qualified accountant or tax adviser.