IRS Collection Guide

Back Taxes: What Happens When You Owe the IRS and Cannot Pay

By Ray Neu, Publisher | Last reviewed: October 25, 2026 | Reading time: 10 min

Short answer

Owing back taxes means a filed balance went unpaid. Under 26 U.S.C. § 6651(a)(2), a failure-to-pay penalty adds 0.5% a month, capped at 25%, and interest compounds daily at 7% a year for individuals in the fourth quarter of 2026. The IRS offers payment plans, currently not collectible status and offers in compromise.

This guide is for people who filed but owe the IRS more than they can pay now: how the balance grows, which bills arrive, the payment options on irs.gov, how long the IRS can collect, and what follows if nothing is arranged. Figures come from the Internal Revenue Code and IRS pages reviewed in October 2026. If returns are still missing, see the guide to unfiled tax returns; if the IRS is questioning the return itself, see IRS audits.

Deadline to know: The IRS says you have 30 days from receipt of an LT11 or Letter 1058 to request a Collection Due Process hearing. Under 26 U.S.C. § 6330(a), that right-to-hearing notice must be given not less than 30 days before the first levy.

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How an unpaid balance grows

Two charges run until back taxes are paid in full: the failure-to-pay penalty and interest, which the IRS also charges on the penalty.

The failure-to-pay penalty

Under 26 U.S.C. § 6651(a)(2), when tax shown on a return is not paid by the due date, the IRS adds 0.5% of the unpaid tax for each month or part of a month, up to 25% in total. For tax that was not shown on the return and is billed later, § 6651(a)(3) applies the same rate if the bill is not paid within 21 calendar days of notice and demand (10 business days if the bill is $100,000 or more). A full month is charged even if the tax is paid mid-month, and an extension to file does not extend the time to pay.

Situation	Monthly failure-to-pay rate
Standard rate, § 6651(a)(2) and (a)(3)	0.5% per month or part of a month
Individual who filed on time, while an installment agreement is in effect, § 6651(h)	0.25%
Starting 10 days after a notice of intent to levy, § 6651(d)	1%
Maximum total	25% of the unpaid tax

The statute excuses the penalty when the failure was due to reasonable cause and not willful neglect.

Interest

Section 6601 charges interest from the payment due date until the date paid, at the § 6621 underpayment rate: the federal short-term rate plus 3 percentage points, set each quarter. For the quarter beginning October 1, 2026, the IRS announced in IR-2026-98 that the individual underpayment rate is 7% per year, compounded daily. Interest keeps accruing during a payment plan, on penalties and on prior interest. It is reduced only when the tax or penalty is reduced, or when it came from an unreasonable IRS error or delay (requested on Form 843).

The usual notice sequence for a balance due

Publication 594 describes only a first bill and at least one more before collection begins, so not every account sees every letter below. The IRS notice pages describe this order:

CP14. A bill for the unpaid balance. No interest is charged on the amount shown if it is paid in full by the date on the notice.
CP501. A reminder. Without payment or contact, the IRS says it can file a notice of federal tax lien.
CP503. The second reminder, again noting a possible lien filing.
CP504. The IRS calls it the Notice of Intent to Levy under Code section 6331(d); it allows a levy on a state tax refund and mentions passports. The IRS Collection Due Process FAQ adds that other levies cannot rest on this notice alone. CP501, CP503 and CP504 each mention a Collection Appeals Program appeal.
LT11 or Letter 1058. The Final Notice of Intent to Levy and Notice of Your Right to a Hearing. A Collection Due Process hearing can be requested on Form 12153 within 30 days of receipt.

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Payment options listed on irs.gov

Short-term payment plan

Up to 180 days, $0 setup fee. Individuals can apply online if they owe less than $100,000 in combined tax, penalties and interest. Penalties and interest continue.

Long-term installment agreement

Section 6159 authorizes written agreements to pay in installments. Individuals can apply online if they owe $50,000 or less in combined tax, penalties and interest and have filed all required returns. Larger balances can use Form 9465, sometimes with Form 433-F and a lien determination. Setup fees for 2026, per the IRS page updated March 3, 2026:

Long-term plan type	Online	Phone, mail or in person
Direct debit (automatic monthly payments)	$29	$107
Other payment methods	$69	$178
Low income, direct debit	Waived	Waived
Low income, other methods	$43 (may be reimbursed)	$43 (may be reimbursed)

Low income means adjusted gross income at or below 250% of the federal poverty level. The IRS generally does not levy while a plan is being considered or is in effect, for 30 days after a rejection or termination, or during an appeal. Under § 6159(b)(4), a missed installment or an unpaid new tax bill lets the IRS modify or end the agreement.

Currently not collectible

If paying would leave a taxpayer unable to meet basic living expenses, the IRS may suspend most collection. The debt is not forgiven, penalties and interest continue, a lien may still be filed, and refunds may be applied. The IRS may ask for Form 433-F or Form 433-A and reviews the account periodically.

Offer in compromise

An offer in compromise may settle the debt for less than the full amount. The IRS says it generally will not accept an offer if the debt can be paid in full through a payment plan or asset equity. Applications require a $205 fee and a first payment unless low-income rules apply.

Penalty relief, including first-time abatement

The failure-to-pay penalty is eligible for relief. The IRS names three types: first-time abatement and administrative waiver, reasonable cause, and statutory exception. Some requests are handled by phone; otherwise relief is requested on Form 843.

First Time Abate. Requires three prior years of the same return filed on time with no penalties (other than estimated tax) or penalties later abated for reasonable cause. It must be requested, and the failure-to-pay penalty may keep accruing until the tax is paid.
Automatic Exemption from Penalty. Starting summer 2026, the IRS is transitioning first-time abatement to an automatic exemption for 2025 tax year returns and later: with three prior years of timely compliance, penalties under § 6651(a)(2) and (a)(3) are not assessed. Tax and interest are still owed.
Reasonable cause. For taxpayers who acted in good faith and can show why they could not meet the obligation.

When a penalty is reduced, its interest is reduced automatically; interest itself is not removed for reasonable cause or first-time relief.

The 10-year collection period

Under 26 U.S.C. § 6502(a)(1), the IRS may collect by levy or court proceeding within 10 years after the tax is assessed. The IRS calls the end date the Collection Statute Expiration Date (CSED). Each assessment has its own CSED, shown on the account transcript.

When the law bars collection, the clock generally pauses. Events the IRS lists include:

A pending installment agreement request, plus 30 days after a rejection, withdrawal or proposed termination, and any appeal.
A pending offer in compromise, plus 30 days after a rejection, and any appeal.
A Collection Due Process hearing, from the request until a final determination, including appeals.
Bankruptcy, from the petition until it closes, plus 6 months.
Living outside the United States continuously for 6 months or more.

The collection period is not suspended while an installment agreement is in effect.

Refund offsets and what escalates if nothing is arranged

Under 26 U.S.C. § 6402(a), the IRS may credit an overpayment against any unpaid federal tax liability and refund only the rest. The IRS mails a notice showing how the refund was applied. On a joint return, a spouse whose refund paid the other spouse’s debt may request injured spouse relief.

Publication 594 says a lien arises by law when the first bill goes unpaid. Without an arrangement, the later notices lead to:

A public lien notice. See federal tax lien.
Levies on accounts and pay. See IRS bank levy and IRS wage garnishment.
Passport certification. Under § 7345, the IRS can certify a seriously delinquent tax debt to the State Department, which may deny or revoke a passport. For 2026 that means more than $66,000 (the statute’s $50,000, indexed for inflation), plus a filed lien with rights exhausted or lapsed, or a levy. Timely installment agreements, accepted offers, currently not collectible accounts and pending requests are excluded. Certification comes with Notice CP508C.

When an attorney matters

Publication 594 says an attorney, a certified public accountant or an enrolled agent, among others, can represent a taxpayer in collection using Form 2848. For a routine plan any of them can work with the IRS, and the free Taxpayer Advocate Service, an independent organization within the IRS, helps with unresolved problems. Taxpayers often ask an attorney when:

A hearing may go to court. Under § 6330(d)(1), a Collection Due Process determination can be taken to the Tax Court within 30 days.
Confidentiality matters. Section 7525 extends attorney-style privilege to CPAs and enrolled agents only in noncriminal tax matters.
The balance is large or the options overlap. A partial-payment plan brings a lien determination and reviews every two years; an offer extends the collection period.
Passport certification is disputed. The IRS says a taxpayer can sue in the Tax Court or a U.S. District Court over an erroneous certification.

Related guides

Frequently Asked Questions

What happens if you owe back taxes and cannot pay in full?

The IRS sends a series of bills starting with Notice CP14, while a failure-to-pay penalty and daily interest add to the balance. Options include a short-term plan, an installment agreement, currently not collectible status or an offer in compromise. Unresolved balances can lead to a lien and levy.

How much is the IRS penalty for not paying taxes on time?

Under 26 U.S.C. § 6651(a)(2), it is 0.5% of the unpaid tax for each month or part of a month, capped at 25%. It drops to 0.25% during an installment agreement if the individual filed on time, and rises to 1% starting 10 days after a notice of intent to levy.

Does a payment plan stop IRS penalties and interest?

No. Penalties and interest continue until the balance is paid in full. A long-term installment agreement can lower the failure-to-pay rate to 0.25% a month for an individual who filed on time.

Can the IRS keep my tax refund to pay back taxes?

Yes. Section 6402(a) lets the IRS credit an overpayment against unpaid federal tax, and the IRS mails a notice explaining it. Refunds are applied during a payment plan and may be applied in currently not collectible status.

How long can the IRS collect back taxes?

Generally 10 years from assessment, under 26 U.S.C. § 6502, ending on the Collection Statute Expiration Date. Pending installment agreement requests, offers in compromise, Collection Due Process hearings and bankruptcy can pause or extend it.

Talk through your IRS balance

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About the Author

Ray Neu

Ray Neu is the publisher of IRSAttorneys.net. A former law enforcement officer with a background in criminal justice and digital publishing, he oversees editorial direction, partnership standards, and compliance review for the site. He is not an attorney and does not provide legal advice; all tax law content is sourced and reviewed against the standards documented on the Editorial Team & Standards page.

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IRS Circular 230 Disclosure: To ensure compliance with Treasury Department rules governing tax practice, any tax information contained on this website was not written and is not intended to be used, and cannot be used, for the purpose of avoiding any federal tax penalty. You should consult a licensed tax professional regarding your individual situation.

Results described on this website are not a guarantee, warranty, or prediction of the outcome of any tax matter. Every situation is different. Prior results do not guarantee a similar outcome. Article content reflects general information about federal tax procedure as of the last reviewed date and may not reflect subsequent changes in IRS policy, regulations, or case law.