Finance charges are tax deductible only when the underlying debt was used for a home, a business, a taxable investment, or qualified higher education. Interest on credit cards, car loans, personal loans, and store financing is not deductible, no matter what the statement calls the charge. What the IRS looks at is how you used the borrowed money, not the name the lender puts on the fee.
Personal Finance Charges Are Not Deductible
Federal law bars any deduction for “personal interest,” a category that sweeps in every borrowing cost that isn’t tied to a home, a business, an investment, or a student loan.1Office of the Law Revision Counsel. 26 U.S.C. 163 – Interest The credit card balance you’re carrying, the interest on your auto loan, the financing fee on a new couch, the APR on a personal loan from your bank — none of it reduces your tax bill.2Internal Revenue Service. Topic No. 505, Interest Expense
The label on the statement does not change the answer. Whether the lender writes “finance charge,” “service charge,” or “interest,” a charge tied to personal spending stays personal. That’s where most searches for a deduction end. The categories below are the exceptions.
Home Mortgage Interest
Interest on a loan used to buy, build, or substantially improve your primary home or one second home is deductible, provided the loan is secured by that property.3Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction Two caps apply, depending on when the loan was taken out:
- Mortgages taken out before December 16, 2017: interest is deductible on up to $1,000,000 of acquisition debt ($500,000 if married filing separately).
- Mortgages taken out on or after December 16, 2017: the cap drops to $750,000 ($375,000 if married filing separately).3Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction
The $750,000 limit was originally set to expire after 2025, but Congress made it permanent through the One Big Beautiful Bill Act. For 2026 and beyond, the cap stays in place for any mortgage originated after December 15, 2017. A couple carrying a $900,000 mortgage can deduct only the share of interest attributable to the first $750,000.
Points paid on a mortgage are treated as prepaid interest. On a purchase of your main home, you can generally deduct the full amount in the year you paid. On a refinance, you spread the deduction evenly over the life of the new loan; $3,000 in points on a 30-year refi becomes a $100 annual deduction. Points paid by the seller on your behalf are still deductible by you as the buyer, but you’ll reduce your home’s cost basis by the same amount. Mortgage prepayment penalties also count as deductible home mortgage interest.4Internal Revenue Service. Topic No. 504, Home Mortgage Points
Your lender reports the interest you paid on Form 1098, which covers mortgage interest, points, and any mortgage insurance premiums.5Internal Revenue Service. Instructions for Form 1098, Mortgage Interest Statement Keep it. That form is what the IRS checks if the return is questioned.
Home Equity Loans and HELOCs
Interest on a home equity loan or HELOC is deductible only when the money is used to buy, build, or substantially improve the home securing the debt.6Internal Revenue Service. Real Estate Taxes, Mortgage Interest, Points, Other Property Expenses Adding a room, replacing the roof, or installing a new HVAC system qualifies. Painting scuffed walls or patching drywall does not; routine maintenance isn’t a substantial improvement.3Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction
Use a HELOC to pay off credit cards, cover medical bills, or take a vacation, and the interest is personal — no deduction. The balance also stacks with your first mortgage against the $750,000 cap. If you already owe $700,000 on your primary mortgage, interest on only the first $50,000 of home equity borrowing is deductible, even when every dollar went toward qualifying improvements.
The burden of proof sits with you. Keep contracts, invoices, and receipts that trace the funds to the work. Depositing HELOC money into a general checking account and paying for improvements alongside personal expenses makes the deduction hard to defend under audit.
Student Loan Interest
You can deduct up to $2,500 per year in interest paid on qualified education loans.7Office of the Law Revision Counsel. 26 U.S. Code 221 – Interest on Education Loans This one is unusually friendly to taxpayers because it’s an above-the-line adjustment: you claim it whether or not you itemize, and it directly reduces your adjusted gross income.8Internal Revenue Service. Topic No. 456, Student Loan Interest Deduction The loan must have been taken out solely for qualified higher education costs such as tuition, fees, and room and board.
Income limits apply. For 2026, the deduction begins phasing out at $85,000 of modified adjusted gross income for single filers and disappears at $100,000. For married couples filing jointly, the phase-out runs from $175,000 to $205,000. You also have to be legally obligated on the loan; a parent can’t claim the deduction on a loan held in a child’s name.
Business Finance Charges
Interest on borrowing that’s ordinary and necessary for running your business is fully deductible as a business expense.9Office of the Law Revision Counsel. 26 U.S. Code 162 – Trade or Business Expenses That covers business loans, commercial credit cards, and professional lines of credit. Sole proprietors take the deduction on Schedule C, which reduces income before the itemize-or-standard decision even comes up.
The money has to actually fund the business. Borrow $50,000 for the business, spend $20,000 of it on a personal vacation, and only the interest attributable to the $30,000 spent on operations is deductible. Keeping separate accounts for business and personal spending is the cleanest way to preserve the deduction. Commingling gives the IRS a reason to disallow the whole thing.
Investment (Margin) Interest
Borrow money to buy taxable investments — typically through a brokerage margin account — and the interest is deductible up to the amount of your net investment income for the year. Pay $5,000 in margin interest but earn only $3,000 of investment income, and the deduction is capped at $3,000. The remaining $2,000 carries forward indefinitely.1Office of the Law Revision Counsel. 26 U.S.C. 163 – Interest
One wrinkle catches a lot of investors. Qualified dividends and long-term capital gains are excluded from “net investment income” by default, which lowers the ceiling on your deduction. You can elect on Form 4952 to reclassify those amounts as ordinary investment income and lift the cap, but those dividends and gains then lose their preferential lower tax rates.10Internal Revenue Service. Form 4952, Investment Interest Expense Deduction Run the numbers before making the election; it’s effectively irrevocable without IRS consent.
Form 4952 must be filed with your return to claim the deduction, unless your investment interest expense is less than your interest and ordinary dividend income, you have no other investment expenses, and you have no disallowed interest carrying forward from a prior year.10Internal Revenue Service. Form 4952, Investment Interest Expense Deduction
Will You Actually Save Anything?
A deduction on paper doesn’t always translate to money in your pocket. Mortgage interest and investment interest are itemized deductions on Schedule A, which means they only help if your total itemized deductions exceed the standard deduction. For 2026, that’s $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household.11Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
Those thresholds are high. A married couple with a $300,000 mortgage at 6.5% pays roughly $19,000 a year in interest, well short of the $32,200 standard deduction on its own. Without meaningful state and local taxes, charitable giving, or other Schedule A items on top, they take the standard deduction, and the mortgage interest deduction stays theoretical.
Student loan interest and business interest for sole proprietors sit above the line. They reduce income whether or not you itemize, so every qualifying dollar cuts your taxable income directly. That’s what makes those two deductions the most reliable of the group.