Is Interest Income a Debit or Credit?
Interest income is a credit. Revenue accounts increase with credits, so interest earned on a bank account, a note or an investment is credited to income. Its normal balance is a credit, it is reported on the income statement, and on a business return it usually belongs on its own line rather than inside gross receipts.
- Account category
- Revenue
- Normal balance
- Credit (Cr)
- Increases with
- Increase (Cr)
- Decreases with
- Decrease (Dr)
- Financial statement
- Income statement
Classifying one account is easy. Ledger IQ classifies the whole trial balance.
Try it freeInterest income on a trial balance
| Acct # | Account | Debit | Credit |
|---|---|---|---|
| 1000 | Cash | 48,200.00 | |
| 1200 | Accounts receivable | 86,400.00 | |
| 1300 | Inventory | 72,500.00 | |
| 1500 | Equipment, net of depreciation | 82,000.00 | |
| 2000 | Accounts payable | 31,500.00 | |
| 2400 | Notes payable | 85,000.00 | |
| 3900 | Equity, beginning of year | 172,600.00 | |
| 4000 | Sales revenue | 550,000.00 | |
| 4100 | Sales returns and allowances | 12,000.00 | |
| 4200 | Interest income (the account this page is about) | 1,200.00 | |
| 5000 | Cost of goods sold | 240,000.00 | |
| 6000 | Salaries and wages | 96,000.00 | |
| 6050 | Officer compensation | 60,000.00 | |
| 6060 | Payroll taxes | 11,900.00 | |
| 6100 | Rent expense | 36,000.00 | |
| 6150 | Insurance expense | 14,400.00 | |
| 6200 | Utilities expense | 9,600.00 | |
| 6250 | Advertising expense | 7,200.00 | |
| 6275 | Meals | 4,800.00 | |
| 6300 | Depreciation expense | 19,000.00 | |
| 6350 | Amortization expense | 4,000.00 | |
| 6400 | Bad debt expense | 3,500.00 | |
| 6450 | Interest expense | 6,800.00 | |
| 6900 | Other operating expenses | 26,000.00 | |
| Total | 840,300.00 | 840,300.00 |
Example journal entries
| Account | Debit | Credit |
|---|---|---|
| Cash | 1,200.00 | |
| Interest income | 1,200.00 |
| Account | Debit | Credit |
|---|---|---|
| Interest receivable | 900.00 | |
| Interest income | 900.00 |
Why it works that way
Income increases equity, and increases on the equity side of the accounting equation are credits. Interest income behaves like any other revenue account in that respect: credit to record it, and a debit only to correct it.
What makes it worth its own page is not the bookkeeping. It is where the balance goes on the return.
On a pass through return it leaves page 1
This is the part preparers get wrong, and it changes the K-1s.
On Form 1120S and Form 1065, interest income is a separately stated item. It comes off page 1 entirely and is reported on Schedule K, line 4 on an 1120S and line 5 on a 1065, then flows to each owner's K-1 in the matching box.
Leaving it in gross receipts on page 1 overstates ordinary business income and understates separately stated interest income by the same amount. The totals look fine. The K-1s are wrong, because interest is not subject to self employment tax and is treated differently in the recipient's hands.
On Form 1120 it is simpler: interest income sits on page 1, line 5.
Interest the business earns is not interest the business pays
They are separate accounts, separate lines and separate rules, and they should never be netted. Interest expense is a deduction with its own limitations; interest income is income. Netting them hides both.
The one place the two meet is a related party loan, where the company charging below market interest on a shareholder loan may have imputed interest income it never actually received.
Tax exempt interest still gets reported
Municipal bond interest is not taxable but it is not invisible either. It is reported as tax exempt income, on Schedule K of a pass through return and in the appropriate place on Form 1120, and it increases basis and AAA even though it is not taxed.
A client whose books lump municipal and taxable interest into one account has to have the two separated, because reporting the whole balance as taxable overstates income and reporting none of it understates the information the K-1 is required to carry.
Where it fits in the accounting equation
Tax return treatment
| Form | Line |
|---|---|
| Form 1120 | Page 1 line 5, interest income |
| Form 1120S | Schedule K line 4, not page 1, and K-1 box 4 |
| Form 1065 | Schedule K line 5, not page 1, and K-1 box 5 |
Common questions
Is interest income a debit or credit?
A credit. It is a revenue account, so earning interest credits it. A debit to interest income is a correction or a reversal, not a normal transaction.
Where does interest income go on an 1120S or 1065?
On Schedule K as a separately stated item, line 4 on an 1120S and line 5 on a 1065, flowing to the matching box of each K-1. It does not stay in gross receipts on page 1. Leaving it there overstates ordinary business income and misstates every K-1.
Can I net interest income against interest expense?
No. They are different accounts on different lines with different rules. Interest expense is a deduction subject to its own limitations; interest income is income, and on a pass through return it is separately stated. Netting them misreports both.
Is tax exempt interest reported anywhere?
Yes. Municipal interest is not taxable but is still reported as tax exempt income, and it increases shareholder or partner basis and the accumulated adjustments account on an S corporation. Books that combine it with taxable interest need the two split before the return is prepared.
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Last reviewed October 17, 2026.