How to Check If You Owe Back Taxes

Back taxes can feel intimidating, especially if you are not sure what you owe, which year it came from, or whether the IRS has the right information. The first step is not panic. It is confirmation.

In this guide, you’ll learn how to check if you owe back taxes, where to look, how to review IRS notices, how to separate federal and state balances, and what to do once you know the amount.

TL;DR: Quick Decision Guide

• If you think you owe federal taxes → start with your IRS Online Account.
• If you received an IRS notice → read the notice and compare it with your records.
• If you are missing old tax forms → request IRS transcripts.
• If you may owe state taxes → check directly with your state tax agency.
• If you confirm a balance → pay what you can, set up a payment plan, or get help before ignoring it.

Step 1: Check Your IRS Online Account

The fastest place to check a federal tax balance is your IRS Online Account. The IRS says taxpayers can use an online account to view tax information, including balance details, payment history, tax records, and other account information.

Your online account may show:

• Amount owed
• Balance by tax year
• Payment history
• Scheduled or pending payments
• Certain notices
• Tax records and transcripts
• Payment plan information
• Economic impact or credit history, when applicable

What to do:
Go directly to IRS.gov and sign in to your IRS Online Account. Avoid links in texts, emails, or ads that claim to help you “check your IRS balance.”

👉 Explore: Tax software and free filing options in the Marketplace →

Step 2: Review Any IRS Notices You Received

If the IRS believes you owe money, you may receive a notice by mail. The notice should explain the tax year, balance, due date, and what action to take.

A common balance due notice is CP14. The IRS says a CP14 notice means you owe money on unpaid taxes and should read the notice carefully, pay by the due date, set up a payment plan if you cannot pay in full, or contact the IRS if you disagree.

When reviewing a notice, look for:

• Notice number
• Tax year
• Amount owed
• Penalties and interest
• Payments the IRS says it received
• Response deadline
• Payment deadline
• Contact information
• What to do if you disagree

What to do:
Compare the notice with your filed return, payment confirmations, and bank records. Do not assume the notice is automatically right or wrong.

👉 Related: How to Pay Taxes You Can’t Afford All at Once →

Step 3: Request Tax Transcripts if You Need More Detail

If you are unsure what was filed, what income was reported, or whether a return was processed, tax transcripts can help.

The IRS says you can access personal tax records online or by mail, including transcripts of past tax returns, tax account information, wage and income statements, and verification of non-filing letters.

Useful transcript types may include:

The IRS says Wage and Income transcripts show data reported on information returns such as W-2s, 1099 series forms, 1098 series forms, and Form 5498, though state or local information may not be included.

What to do:
Pull transcripts for each year you are unsure about. Review one year at a time so the situation does not feel bigger than it is.

Step 4: Check Whether You Have Unfiled Returns

Sometimes people think they owe back taxes, but the deeper issue is an unfiled return. If the IRS has income records for you but no return, it may eventually contact you or create a substitute return.

Signs you may have an unfiled return include:

• You cannot find a filed copy for a year
• IRS transcript shows no return filed
• You received income forms but never filed
• You moved and missed tax notices
• You were self-employed and skipped filing
• You thought your income was too low but are unsure
• You received a notice asking for a return

What to do:
Use your IRS transcripts and records to identify missing years. If more than one year is missing, consider working with a tax professional.

Step 5: Confirm Payments Already Made

Before paying a balance, check whether prior payments were applied correctly. This matters because payments can sometimes be applied to the wrong tax year, wrong spouse, wrong account, or not yet fully processed.

Review:

• IRS Online Account payment history
• Bank statements
• IRS Direct Pay confirmations
• EFTPS confirmations
• Tax software payment records
• Extension payment records
• Estimated tax payment records
• Prior-year refund applied to a later year

The IRS has previously noted that some taxpayers received CP14 balance due notices even though payments had been made, which is another reason to compare notices against your records before assuming the balance is correct.

What to do:
If you paid but the IRS balance does not show it, gather payment proof before calling or responding.

Step 6: Check State Taxes Separately

Your IRS account only shows federal tax information. State tax balances are handled separately by state tax agencies.

You may owe state back taxes if:

• You filed late
• You moved states
• Your employer withheld for the wrong state
• You had self-employment income
• You owed federally and also owed state taxes
• You ignored a state notice
• You had unemployment or investment income
• You filed federal but not state

What to do:
Log in to your state tax agency account or contact your state revenue department. Do not assume that resolving the IRS balance also resolves state taxes.

Step 7: Decide What to Do Once You Confirm the Balance

Once you know what you owe, choose the next action.

The IRS says a payment plan is an agreement to pay taxes owed within an extended timeframe, and taxpayers should request one if they believe they can pay the balance in full within the extended time. The IRS Online Payment Agreement system lets qualified taxpayers apply online and receive immediate notification of whether the plan is approved.

What to do:
Do not wait for the balance to disappear. Either pay, set up a plan, dispute it, or get help.

Common Mistakes to Avoid

• Ignoring IRS notices
• Assuming the IRS balance is always correct
• Checking federal taxes but forgetting state taxes
• Paying without confirming the tax year
• Missing old estimated tax payments
• Forgetting extension payments
• Not checking transcripts for missing returns
• Waiting until collection notices escalate
• Trusting tax debt relief companies that promise unrealistic settlements

FAQs on Checking If You Owe Back Taxes

Final Thought

Checking for back taxes is not about scaring yourself. It is about getting clear. Once you know which year, how much, and why, you can make a plan.

Start with your IRS Online Account, review notices, pull transcripts if needed, check state balances separately, and compare everything with your records. The sooner you know where you stand, the sooner you can resolve it.

Next Steps:

• 👉 Learn: How to Set Up a Payment Plan With the IRS →
• 👉 Read: How to Handle a Tax Notice From the IRS →
• 👉 Learn: How to File Taxes Late →
• 👉 Explore: Tax software and free filing options in the Marketplace →