To check how much you owe in taxes, log in to your IRS online account at irs.gov, where your total federal balance appears on the main page broken down by tax, penalties, and interest for each year. State income tax is tracked separately by your state’s revenue department, so you’ll need to check that portal too. If you’d rather not set up an online account, you can call the IRS at 800-829-1040, request a tax account transcript, or read any notices the IRS has already mailed you.
Use Your IRS Online Account
The online account is the fastest way to see a current federal balance. Once you’re in, the dashboard shows what you owe across all tax years, broken into principal tax, accrued interest, and penalties. You can also view more than 200 types of IRS notices digitally, make or cancel payments, and set up or modify a payment plan from the same screen.1Internal Revenue Service. IRS Individual Online Accounts: An Easy Tool for Taxpayers
Clicking into a specific tax year shows why you owe for that year, whether that’s an underpayment of estimated taxes, an adjustment to a filed return, or a balance you never paid. If you sent a payment recently, give it several business days to appear.
Setting Up the Account
The IRS uses ID.me for identity verification. You’ll need a government-issued photo ID (driver’s license, state ID, or passport) and a smartphone or webcam to take a selfie that the software matches against your ID.2Internal Revenue Service. New Identity Verification Process to Access Certain IRS Online Tools and Services If the selfie step doesn’t work for you, ID.me offers a video chat with a live agent as an alternative.3Internal Revenue Service. How to Register for IRS Online Self-Help Tools Have your Social Security Number or ITIN and the filing status from your most recent return ready, because the system checks that information against what the IRS has on file.
If You Don’t Want to Use the Portal
Two other routes give you the same balance information.
Call the IRS
The number is 800-829-1040, staffed Monday through Friday from 7 a.m. to 7 p.m. local time. After the representative verifies your identity, they can tell you the balance, confirm which tax years are outstanding, and walk through the penalties and interest that have been added. Hold times get long during filing season.
Request a Tax Account Transcript
A tax account transcript shows your filing status, taxable income, payments, any post-filing adjustments, and the balance due including penalties and interest.4Internal Revenue Service. Transcript Types for Individuals and Ways to Order Them This is the specific transcript type you want when you’re checking a debt; the other transcript types don’t display balance adjustments.
You can pull it through the IRS “Get Transcript” tool, order it through the automated phone system, or mail Form 4506-T.5Internal Revenue Service. Form 4506-T, Request for Transcript of Tax Return The form needs your full name, current address, and any prior address if you’ve moved since your last filing. Mailed transcripts arrive in five to ten calendar days.4Internal Revenue Service. Transcript Types for Individuals and Ways to Order Them
Read the Notices the IRS Has Already Sent
If you owe, the IRS almost always tells you first. The most common opening notice is CP14, titled “Notice of Tax Due and Demand for Payment,” which the IRS sends after processing a return with an unpaid balance. It lists the exact amount owed, including interest and penalties, and gives you 21 days to pay.6Taxpayer Advocate Service. Notice CP14
A CP2000 is different. You get one when the income reported on your return doesn’t match what employers, banks, or brokerages reported to the IRS. It proposes an adjusted amount due and explains the discrepancy. You have 30 days from the notice date to respond, or 60 days if you live outside the United States.7Internal Revenue Service. Topic No. 652, Notice of Underreported Income – CP2000 If you don’t answer, the IRS treats the proposed changes as accepted and adjusts your account.
Lost the letter? Digital copies of most notice types now sit inside your online account. You can also call 800-829-1040 to have a copy mailed to the address on file.
Check Your State Tax Debt Separately
Your federal balance is only half the picture. State income tax is administered by a different agency, and nothing on irs.gov will show you what you owe your state. Most states run a Department of Revenue, Department of Taxation, or similarly named agency with an online portal for taxpayers.
The login process varies. You’ll generally need a state-issued taxpayer ID or your Social Security Number, plus information from your most recent state return. Once you’re in, look for an “Account Summary” or “Balance Due” section. Many state portals break the balance into tax, penalties, and interest the same way the IRS does.
If your state doesn’t have income tax, this step doesn’t apply to you. Otherwise, treat it as a required second check rather than an optional one.
Why the Balance Keeps Changing
The number you see today probably won’t match the number you saw last month, because two separate charges run on unpaid federal tax and both compound.
The failure-to-pay penalty is 0.5% of your unpaid tax for each month or partial month the balance stays outstanding, capped at 25%.8Internal Revenue Service. Failure to Pay Penalty If you also filed late, the failure-to-file penalty runs at 5% per month, also capped at 25%; when both apply, the failure-to-file amount is reduced by the failure-to-pay amount so you’re not double-charged.9Internal Revenue Service. Failure to File Penalty A useful detail: once you’re in an approved installment agreement and had filed on time, the failure-to-pay rate drops to 0.25% per month.
Interest runs on top of the penalties, from the original due date of the return until you pay in full.10Internal Revenue Service. Interest The rate is set quarterly and compounded daily. For the first quarter of 2026, the individual underpayment rate is 7% annually.11Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026 When you make a payment, the IRS applies it to tax first, then penalties, then interest.12Internal Revenue Service. Topic No. 653, IRS Notices and Bills, Penalties and Interest Charges That order matters if you’re paying anything less than the full balance, because interest keeps growing on any principal you leave behind.
Once You Know the Number
Seeing the balance is step one. If you can pay it now, do that through your online account and watch the balance zero out over the next several business days. If you can’t pay in full, the IRS offers structured options, and applying for one before enforcement starts keeps more choices on the table.
An installment agreement lets you pay monthly. Setup fees run from $22 to $178 depending on how you apply and how you pay, with online applications and direct debit at the low end.13Internal Revenue Service. Payment Plans; Installment Agreements An approved agreement also cuts the monthly failure-to-pay rate in half.8Internal Revenue Service. Failure to Pay Penalty
If your finances are genuinely tight, an offer in compromise can settle the debt for less than the full balance, though the IRS rejects most offers and evaluates income, expenses, and asset equity closely.14Internal Revenue Service. Offer in Compromise If paying anything at all would prevent you from covering basic living expenses, you can ask the IRS to place your account in currently not collectible status, which pauses active collection while interest and penalties keep accruing.
One more thing worth asking about if you have a clean record: first-time penalty abatement can wipe out a failure-to-file or failure-to-pay penalty entirely if you filed the same return type on time for the three prior years and had no penalties in that period.15Internal Revenue Service. Administrative Penalty Relief It won’t remove interest, but on a larger balance the penalty removal alone is worth the phone call.