Credit card interest is deductible only if the card funds a business expense, not the business itself

The IRS allows you to deduct credit card interest, but only on debt used for business purposes. If you charge a business expense to your card — office supplies, equipment, travel — the interest on that charge is deductible. If you use the card to fund your business operations or cover a cash shortfall, the interest is not deductible, even if the money eventually goes to business use.

The distinction matters because the IRS looks at what the borrowed money paid for, not what business you run. A freelancer who puts a $500 software subscription on a business credit card can deduct the interest on that $500. A freelancer who uses the same card to cover payroll because cash flow is tight cannot deduct the interest, because the borrowed money funded operations, not a specific business expense.

This rule applies whether you are a sole proprietor, an LLC, an S-corp, or a C-corp. The structure of your business does not change the rule — only what you borrowed the money for does.

Key Takeaways

  • Interest on credit card debt is deductible only when the card was used to pay for a specific business expense like equipment, supplies, or professional services.
  • Interest on borrowed money used to fund operations, cover payroll, or finance the business itself is not deductible, even if your business ultimately benefits.
  • You must track which charges on your card are business-related and which are personal, because the IRS treats interest on each category differently.
  • Business lines of credit and business loans follow the same rule: interest is deductible only if the borrowed funds paid for a deductible business expense.
  • If you cannot document what a charge was for, the IRS will not allow the interest deduction, so keep receipts and statements that show the business purpose.

How the IRS determines what qualifies as deductible interest

The IRS uses a straightforward test: was the borrowed money used to buy something that produces business income or reduces business expenses? If yes, the interest is deductible. If the money was used to fund the business itself — to cover a gap between what you owe and what you have — the interest is not.

This is why a business loan to buy a delivery truck has deductible interest (the truck is a business asset that generates income), but a business line of credit used to meet payroll does not (the line of credit funded operations, not a specific asset or expense). The borrowed money in both cases went to the business, but the IRS distinguishes between borrowing to acquire something and borrowing to keep the lights on.

Personal credit cards used for business expenses fall into a gray area. If you charge a business expense to a personal card, the interest on that charge is still deductible — but you must be able to prove the charge was business-related. The burden is on you to show documentation: an invoice, a receipt, a contract, or a statement from the vendor showing what you paid for.

What you can and cannot deduct

Deductible: Interest on credit card charges for office equipment, software subscriptions, professional services (accounting, legal, consulting), travel for business purposes, inventory, supplies, and repairs to business property. Interest on a business line of credit used to purchase these items is also deductible.

Not deductible: Interest on credit card charges for personal expenses, even if you own a business. Interest on borrowed money used to cover payroll, rent, utilities, or other operating costs. Interest on a business line of credit used to fund operations rather than purchase a specific asset. Interest on a personal loan or credit card used to start a business (the startup phase itself is not a deductible expense). Interest on borrowed money used to pay taxes or make estimated tax payments.

The line between deductible and non-deductible can blur when a single charge serves multiple purposes. If you buy a laptop that you use 80 percent for business and 20 percent for personal use, you can deduct 80 percent of the interest on that charge. If you cannot separate the business and personal use, the IRS will disallow the entire deduction.

How to track and document deductible interest

The IRS does not require you to file a special form to claim credit card interest as a deduction — you report it on Schedule C (for sole proprietors and single-member LLCs) or on the appropriate business tax form for your entity type. But you must keep records that show what each charge was for and that it was a business expense.

Start by using a separate business credit card if possible. This makes it easier to prove that charges were business-related and simplifies your record-keeping. If you use a personal card for business expenses, code each charge in your accounting software or spreadsheet with a category (equipment, supplies, travel, etc.) and attach a receipt or invoice that shows the business purpose.

At tax time, calculate the total interest you paid on the card for the year (your statement will show this), then multiply it by the percentage of charges that were business-related. If 70 percent of your charges were business expenses and you paid $500 in interest, you can deduct $350. Keep your statement, your receipts, and your calculation in case the IRS asks for backup.

The difference between credit cards and business loans

Business loans and lines of credit follow the same deduction rule as credit cards, but they are often easier to document because the lender knows the loan is for business. A bank will ask what you are borrowing for, and the loan agreement will state the purpose. If the purpose is to buy equipment or inventory, the interest is deductible. If the purpose is to cover a cash flow gap, it is not.

The advantage of a business loan is that the IRS is less likely to question the business purpose — the loan agreement itself is evidence. With a credit card, you have to prove it yourself. The disadvantage is that a business loan typically has a fixed term and payment schedule, whereas a credit card gives you flexibility but also tempts you to use it for non-deductible purposes.

Some business owners use a business line of credit as a safety net for cash flow problems. Interest on that line of credit is not deductible when you draw on it to cover operating expenses. But if you draw on the line to buy a piece of equipment, the interest on that draw is deductible. You will need to track which draws were for which purposes.

What happens if you cannot prove the business purpose

If the IRS audits your return and you cannot show that a credit card charge was business-related, you lose the deduction for the interest on that charge. The IRS will not penalize you for an honest mistake, but it will disallow the deduction and may assess interest on the unpaid tax. If the IRS believes you intentionally misclassified personal expenses as business expenses, it can impose penalties.

The best defense is documentation. Keep your credit card statements for at least three years (the standard IRS audit window). Keep receipts or invoices for every business charge. If a receipt is missing, write a note on your statement explaining what the charge was for and why it was a business expense. This is not as strong as a receipt, but it is better than nothing.

If you are audited and the IRS disallows a deduction, you can appeal the decision if you believe you have additional evidence. But the burden is on you to prove the business purpose, not on the IRS to prove it was personal.

State and local tax treatment of business credit card interest

Most states follow the federal IRS rule: credit card interest is deductible only if the borrowed money was used for a deductible business expense. A few states have different rules or additional requirements, so check your state's tax guidance if you file a state business tax return.

Some states require you to file a separate schedule showing business interest deductions, while others allow you to report it on the same form as federal taxes. If you operate in multiple states, each state may have its own rule. This is rare enough that most small business owners do not encounter it, but if you have a multi-state operation, ask a tax professional or check your state's department of revenue website.

Frequently Asked Questions

Can I deduct interest on a credit card I used to start my business?

No. The IRS does not allow deductions for startup costs or the cost of starting a business, even if you borrowed the money. Once your business is operating, you can deduct interest on borrowed money used to buy business assets or pay business expenses, but the initial startup phase itself is not deductible.

What if I use a business credit card for both business and personal expenses?

You can deduct the interest only on the business portion of the charges. Track your business and personal charges separately, calculate what percentage of your total charges were business-related, and apply that percentage to the total interest you paid. Keep receipts to prove the business purpose of each charge.

Is interest on a business line of credit deductible if I use it to cover payroll?

No. Interest on borrowed money used to cover payroll or other operating costs is not deductible, even if the money goes to a business account. The IRS distinguishes between borrowing to buy an asset and borrowing to fund operations. If you use the line of credit to purchase equipment or inventory instead, the interest on that portion is deductible.

Do I need to report credit card interest separately on my tax return?

No special form is required. You report business interest as part of your business expenses on Schedule C (for sole proprietors) or the appropriate form for your business structure. Your accountant or tax software will guide you to the right line. Keep your documentation in case you are audited.

What if I paid off the credit card balance but did not use the money for business?

The interest is not deductible. The IRS looks at what the borrowed money was used for, not what you did with the money after you borrowed it. If you borrowed money on a credit card and used it to cover personal expenses, the interest is personal interest and is not deductible, regardless of whether you later used business income to pay off the card.