Most payments you send to the IRS are not tax deductible, but there are real exceptions worth knowing. Whether IRS payments are tax deductible depends on what the payment is for: federal income tax, employee Social Security and Medicare withholding, and IRS penalties give you nothing back at tax time, while half of self-employment tax, state and local taxes, foreign income taxes, and interest on business-related tax debts can reduce what you owe.
Federal Income Tax and Employee FICA
Federal law bars you from deducting federal income taxes on your federal return. It doesn’t matter how the payment reached the IRS: withholding from your paycheck, quarterly estimated payments, and a balance due with your Form 1040 are all treated the same way. Social Security and Medicare taxes withheld from an employee’s wages are also not deductible.1Office of the Law Revision Counsel. 26 U.S. Code 275 – Certain Taxes
The same statute rules out a few other federal payments people sometimes ask about. Federal estate and gift taxes cannot be deducted against income, and federal excise taxes are excluded as well.
Half of Self-Employment Tax Is Deductible
If you’re self-employed, you can deduct one-half of the self-employment tax you pay for the year.2Office of the Law Revision Counsel. 26 U.S. Code 164 – Taxes This mirrors the treatment employers get when they deduct their share of payroll taxes as a business expense.
The deduction is an adjustment to gross income, so you take it whether or not you itemize. You calculate it on Schedule SE and carry it to Form 1040, where it reduces your adjusted gross income. That drop in AGI can improve your eligibility for other credits and deductions tied to income. It does not, however, reduce the self-employment tax itself or your net earnings from self-employment.3Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
Interest the IRS Charges You
When you carry a balance with the IRS, interest accrues. Whether that interest is deductible depends entirely on what the underlying tax debt relates to.
Interest on a personal tax balance is personal interest, and federal law disallows a deduction for personal interest.4Office of the Law Revision Counsel. 26 U.S. Code 163 – Interest If an audit produces additional tax on your wages, investment income, or other personal items, the interest you eventually pay on that balance gets no deduction.
Interest on a tax debt properly allocable to a trade or business is different. It escapes the personal interest ban and can be deducted as a business expense. A sole proprietor whose Schedule C income was understated, for instance, can generally deduct the interest that accrues on the resulting balance.
One popular workaround doesn’t work: borrowing against your home to pay off a tax debt and then deducting the loan interest as mortgage interest. Home equity loan interest is deductible only when the loan proceeds are used to buy, build, or substantially improve the home securing the loan.5Internal Revenue Service. Real Estate (Taxes, Mortgage Interest, Points, Other Property Expenses) Paying tax debt with the funds doesn’t qualify.
IRS Penalties and Fines
Penalties and fines paid to a government are not deductible.6eCFR. 26 CFR 1.162-21 – Denial of Deduction for Certain Fines, Penalties, and Other Amounts That covers the ones taxpayers see most often: the failure-to-file penalty, the failure-to-pay penalty, and accuracy-related penalties for understatements. The rule applies whether the penalty is civil or criminal, and whether it’s paid to a federal, state, or local government. A business context does not save you: an IRS penalty imposed on a business is still nondeductible.
State and Local Taxes
Payments to state and local governments are treated more generously than payments to the IRS. If you itemize on Schedule A, you can deduct state and local income taxes, real property taxes, and personal property taxes.2Office of the Law Revision Counsel. 26 U.S. Code 164 – Taxes You can choose to deduct state and local general sales taxes in place of income taxes, but not both in the same year.7Internal Revenue Service. Topic No. 503 – Deductible Taxes
The combined SALT deduction is capped. After the One Big Beautiful Bill signed into law in July 2025, the base cap for 2026 is $40,000 for most filers and $20,000 for married filing separately, with annual inflation adjustments.7Internal Revenue Service. Topic No. 503 – Deductible Taxes The cap phases down once modified adjusted gross income crosses roughly $500,000 ($250,000 for married filing separately), but it does not drop below a floor of $10,000 ($5,000 for married filing separately).
None of this helps unless your itemized deductions clear the standard deduction. If your mortgage interest, charitable contributions, SALT, and other items don’t beat the standard deduction, itemizing just to claim SALT costs you money.
Foreign Income Taxes: Credit or Deduction
Income taxes paid to a foreign government are not payments to the IRS, but they come up in the same conversation. You can either deduct them on Schedule A or claim a foreign tax credit on Form 1116.8Internal Revenue Service. Foreign Tax Credit – Choosing to Take Credit or Deduction
The credit usually wins, because it reduces your tax bill dollar for dollar rather than just reducing the income subject to tax. It also doesn’t require itemizing, so you can pair it with the standard deduction. The choice is all-or-nothing for the year: you can’t credit some foreign taxes and deduct others. If you take the credit and the amount exceeds your limit for the year, the excess may be carried back or forward.
When a State Refund Comes Back as Income
If you deducted state or local taxes in a prior year and later receive a refund, the tax benefit rule can pull that refund back into income.9Office of the Law Revision Counsel. 26 U.S. Code 111 – Recovery of Tax Benefit Items The refund is taxable only to the extent the earlier deduction actually reduced your tax.
If you took the standard deduction that year, the state taxes never produced a benefit, so the refund isn’t taxable. If the SALT cap kept part of your state taxes from being deductible, only the portion that produced an actual benefit is taxable now. Your state usually sends a Form 1099-G showing the refund, but the number on the form may overstate the taxable portion.
Transfer Taxes on Buying or Selling Property
Taxes paid in connection with buying or selling property, such as real estate transfer taxes, are not deductible on your income tax return.2Office of the Law Revision Counsel. 26 U.S. Code 164 – Taxes They get added to the cost basis of the property (if you’re the buyer) or reduce the amount realized on the sale (if you’re the seller), which affects your gain or loss when the property changes hands.