Yes, you debit expenses. In double-entry bookkeeping, every expense account has a normal debit balance, so recording a business cost means entering the amount on the debit side of the expense account and posting an equal credit to whatever account funded it — usually cash, accounts payable, or a prepaid asset. The two sides always match, and the debit is what pushes the cost onto your income statement for the period.
Why Expenses Increase With a Debit
Every general ledger account has a “normal balance,” meaning the side that increases it. Expenses sit on the debit side because they represent resources the business has used up. A common memory aid is DEALER: Dividends, Expenses, and Assets go up with debits, while Liabilities, Equity, and Revenue go up with credits.
When you debit an expense account, you are recording that the business consumed something of value during the period — a contractor’s time, a month of insurance coverage, a box of supplies. That debit is what makes the cost appear on the income statement. Skip it or post it to the wrong account, and both your financial statements and your tax return will be off, which can trigger IRS accuracy-related penalties.1Internal Revenue Service. Accuracy-Related Penalty
What You Credit on the Other Side
A debit to an expense account is only half the entry. The matching credit depends on how the expense is being paid for.
- Paid immediately by check, card, or wire: credit Cash. Your cash balance drops by the same amount the expense rises.
- Paid later on a vendor invoice: credit Accounts Payable. This creates a short-term liability that sits on the balance sheet until you settle the bill. When you pay, a second entry debits Accounts Payable and credits Cash.
- Paid in advance and used over time: credit the prepaid asset. The original payment was booked as an asset; each period, you move the used portion off the balance sheet by debiting the expense and crediting the prepaid account.
Whichever account takes the credit, total debits equal total credits for the transaction. Every dollar has a source and a destination.
When to Record the Debit: Cash vs. Accrual
Your accounting method decides the timing. Under the cash method, you debit the expense when money leaves your account. Under the accrual method, you debit it when the expense is incurred — when you receive the goods or services — regardless of when payment happens. If a shipment arrives October 15 but you pay November 10, accrual accounting records the expense in October; cash accounting records it in November.
Accrual follows the matching principle: expenses belong in the same period as the revenue they helped produce. Wages earned in the last week of December but paid in January are a December expense on the accrual books.
The IRS lets most small businesses use the cash method. For tax years beginning in 2026, a business qualifies if its average annual gross receipts over the prior three tax years were $32 million or less. Above that, most businesses must use accrual.2Internal Revenue Service. Publication 538 – Accounting Periods and Methods Your tax return has to use the same method as your books.3Office of the Law Revision Counsel. 26 US Code 446 – General Rule for Methods of Accounting
Not Every Purchase Gets Debited to an Expense
Some business purchases do not hit an expense account at all. A purchase that provides value for more than one year — equipment, vehicles, buildings, major software — is a capital asset. It gets debited to an asset account on the balance sheet, not to an expense account on the income statement. Only day-to-day costs like rent, utilities, office supplies, and wages go straight to expense.
Capital assets reach the income statement gradually through depreciation (for physical assets) or amortization (for intangibles). Each period, you debit a depreciation expense account and credit accumulated depreciation. The asset stays on the balance sheet at original cost while accumulated depreciation reduces its net book value.
Shortcuts That Turn an Asset Into an Immediate Expense
Federal tax rules let you skip capitalization for some purchases. Under the de minimis safe harbor election, businesses with audited financial statements can expense items costing $5,000 or less per invoice, and businesses without audited statements can expense items costing $2,500 or less. For larger purchases, Section 179 lets a business deduct up to $2,560,000 in qualifying equipment costs in the year of purchase for the 2026 tax year rather than spreading the deduction over years. Either election changes the journal entry from a balance sheet debit to an immediate expense debit.
Expense Debits That Do Not Involve a Payment
Not every expense debit is tied to a check going out. Non-cash expenses are recorded through adjusting entries, usually at month-end or quarter-end, to capture costs that have been incurred but have not yet shown up through a bank transaction or invoice.
- Depreciation: debit Depreciation Expense, credit Accumulated Depreciation. No cash moves; you are recognizing that an asset lost some useful value during the period.
- Prepaid amortization: if you paid $12,000 upfront for a one-year insurance policy, debit Insurance Expense $1,000 each month and credit Prepaid Insurance $1,000. The cash left months ago; the adjusting entry moves the cost into the right period.
- Accrued expenses: on accrual books, wages earned before period-end but not yet paid get a debit to Wage Expense and a credit to Wages Payable. The cash payment comes later.
Because no invoice or bank alert prompts these entries, they slip through easily. A recurring monthly or quarterly close schedule keeps them from being missed.
Posting an Expense to the General Ledger
The entry itself is straightforward. Say the business pays $500 for office supplies with a company check:
- Enter the transaction date.
- Debit Office Supplies Expense for $500.
- Credit Cash for $500.
- Add a description referencing the invoice or receipt number.
If the same purchase were made on account, the credit would go to Accounts Payable instead of Cash. When you later pay the vendor, a second entry debits Accounts Payable and credits Cash.
Most accounting software runs a balancing check after each entry to confirm total debits equal total credits, flagging out-of-balance entries before they enter the permanent ledger. That catch prevents small keying mistakes from cascading into reconciliation problems later.
Correcting an Expense Posted to the Wrong Account
If you find that a $2,000 equipment purchase was mistakenly debited to Tax Expense, do not delete the original entry. Post a correcting entry that moves the amount to the right account:
- Debit Equipment Expense $2,000 (the account that should have been used).
- Credit Tax Expense $2,000 (the account that was wrong).
The correction shifts the amount between expense accounts without touching the cash side of the original transaction. Include a memo explaining the fix and referencing the original entry date. That memo is the audit trail — it shows what changed and why.
How Expense Debits Roll Into Owner’s Equity
The accounting equation says assets equal liabilities plus owner’s equity. Expenses are subtracted from revenue to arrive at net income, and net income flows into retained earnings. So every expense debit ultimately reduces the owner’s stake in the business. That is why the mechanics matter beyond the income statement: consistent, correctly categorized expense debits give you an accurate picture of margin, book value, and taxable income, and they hold up if the IRS ever asks to see the work behind the numbers.