IRS Notice CP503: The Second Reminder and Why CP504 Comes Next
A CP503 is the IRS’s second reminder that a balance is unpaid because the IRS has not heard from you. The IRS says the entire balance is due by the date shown to avoid more penalties and interest; the alternatives it lists are a payment plan or a call to dispute it. The CP504, a Notice of Intent to Levy, is next.
The CP503 is the last reminder in the sequence before levy language appears. This page looks at how its wording hardens compared with the CP501, why the CP504 follows, what changes at that point, and the Collection Appeals Program the CP503 page names.
Deadline to know: the IRS page answers “How much time do I have?” by saying the entire balance has to be paid by the due date shown on your notice to avoid additional penalties and interest. It gives no number of days; the printed date governs.
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What a CP503 says and why the IRS sent it
The IRS gives two versions of the reason. At the top of its page: “You received this notice because we haven’t heard from you and you still have an unpaid balance on one of your tax accounts.” In its FAQ: “This notice is your second reminder,” sent because the IRS has not received payment or a response to “previous notice(s)” asking you to pay.
The instructions match the earlier reminder: read the notice, pay by the due date shown, make a payment plan if the full amount is out of reach, and call the toll-free number if you disagree. What is new is tone and timing, set out below.
How the wording escalates from the CP501
| Point | CP501 page | CP503 page |
|---|---|---|
| Label | “a reminder” | “your second reminder” |
| Reason | no response to “the previous notice” | “we haven’t heard from you”; “previous notice(s)” |
| Lien | “we can file a notice of federal tax lien” | “we may file a Notice of Federal Tax Lien if we haven’t already done so” |
| Time | pay by the due date shown | adds a “How much time do I have?” answer: the entire balance by the due date |
| Penalty | the IRS “may be able to remove the penalty” | no penalty-removal line |
| Already acted | not addressed | call anyway so the account reflects it |
The lien clause matters most. “If we haven’t already done so” signals that a public Notice of Federal Tax Lien may already be on file by the time a CP503 arrives. The CP503 page repeats that a filed notice alerts creditors to the IRS claim on present and future assets and can hurt credit. Our federal tax lien guide covers what follows a filing.
Why the next step is the CP504
Publication 594 describes three stages: a first bill, “at least one more bill,” and then, “after you receive your final bill,” collection actions. The CP504 page calls that next notice “your final reminder” and identifies it as “your Notice of Intent to Levy (Internal Revenue Code section 6331 (d)).” It names wages, bank accounts and state tax refunds as levy targets and also explains passport denial or revocation.
What the levy statute requires
Section 6331(a) of the Code makes levy lawful once tax goes unpaid for 10 days after notice and demand. Section 6331(d) adds that the IRS must first give written notice of its intention, in person, at the home or business, or by certified or registered mail, “no less than 30 days before the day of the levy.” The CP503 does not serve that function; the CP504 does.
Even the CP504 is not the last step for most property. The IRS hearing FAQ says “The IRS cannot levy with just this notice” and that a formal Notice of Intent to Levy and Your Right to a Hearing comes next: the LT11 or Letter 1058, which gives 30 days to request a Collection Due Process hearing. The CP504 page says a state tax refund can be levied first.
The penalty rate after a levy notice
The CP503 comes before the notice that changes the penalty rate. Under 26 U.S.C. § 6651(d), the 0.5 percent monthly rate becomes 1 percent starting 10 days after notice under § 6331(d) is given. The IRS failure-to-pay page and Notice 746 say the same. The 25% cap still applies, and interest keeps compounding daily, on penalties and interest as well as tax, at 7% a year for individuals in the quarter that began October 1, 2026 (IR-2026-98).
The Collection Appeals Program on a CP503
Among its suggested steps, the CP503 page lists a Collection Appeals Program (CAP) request made ahead of any collection action, using the instructions printed on the notice. Publication 1660, Collection Appeal Rights (Rev. 1-2020), describes what CAP is for:
- Scope. Before or after a Notice of Federal Tax Lien is filed, before or after a levy or seizure, and the rejection, modification or termination of an installment agreement.
- Speed and reach. CAP “generally results in a quicker Appeals decision and is available for a broader range of collection actions” than a Collection Due Process hearing.
- What it cannot do. CAP will not hear an argument that the tax is not owed or is the wrong amount.
- Finality. Appeals’ CAP decision is binding on you and the IRS, with no judicial review.
Publication 594 lays out the mechanics: a conference with the Collection manager comes first (no deadline applies while a lien or levy is merely proposed); after it, the Collection office must hear within 2 business days that Form 9423, Collection Appeal Request, is coming, and the form must be received or postmarked within 3 business days of the conference. The IRS hearing FAQ warns that CAP and CDP “offer different advantages” and that using one “could preclude certain issues” from the other.
Before the CP504 arrives
An evaluation can help you compare a payment plan, a dispute and a collection appeal while the account is still at the reminder stage.
If the CP503 is wrong or already handled
For a disagreement, the CP503 page says to contact the IRS “immediately,” and to call with questions “by your payment due date.”
It also covers something the CP14 and CP501 pages do not: corrective action already taken. If a payment or other fix is already in, the IRS says to call the toll-free number anyway “to make sure your account accurately reflects the actions you’ve taken.” The CP504 page gives the same advice for a balance already paid or already covered by an installment agreement.
Payment options at the second-reminder stage
The CP503 page says to pay online or by mail with “the bottom part of the notice.” For a plan, it points to the online payment agreement tool or a mailed installment agreement request (Form 9465).
- Installment agreement. The IRS payment plans page, updated March 3, 2026, allows online long-term plans for balances of $50,000 or less if every required return is filed, and short-term plans (180 days or less) for balances under $100,000. Larger balances go on Form 9465, sometimes with Form 433-F.
- Timing. Enforced collection is generally off the table, the IRS says, while a plan request is under review or a plan is in effect, for 30 days after a rejection or termination, and during an appeal of either.
- Hardship. Currently not collectible status suspends most collection; the debt stays and penalties and interest continue.
- Settlement. The IRS says it suspends most collection while it reviews an offer in compromise, but generally rejects offers when a payment plan or asset equity could pay the debt.
Where the CP503 sits in the notice sequence
| Order | Notice | How the IRS page describes it |
|---|---|---|
| 1 | CP14 | first bill for unpaid tax |
| 2 | CP501 | a reminder, with a lien warning |
| 3 | CP503 | second reminder (this page) |
| 4 | CP504 | Notice of Intent to Levy, “final reminder” |
| 5 | LT11 / Letter 1058 | intent to levy with hearing rights |
The IRS notices hub covers each notice in turn.
Telling a real CP503 from an imitation
The IRS describes how its collection staff actually make contact:
- Revenue officers mail Letter 725-B or call to set up a visit, after several notices and letters; the IRS says unannounced visits are rare.
- Officers carry an IRS pocket commission and an HSPD-12 card, and you can ask to see both; payments to an officer are made out to “United States Treasury.”
- A call, email or text that rushes or threatens you, asks for personal or financial information, or demands payment now is not from the IRS.
To check the letter itself, search the notice number on irs.gov. If it does not appear or looks suspicious, the IRS says to call 800-829-1040; the CP503 page also points to the IRS number at the top of the notice.
When a representative matters before a CP504
Choices made here can be hard to undo: whether to use CAP or wait for Collection Due Process rights, how to raise a dispute CAP cannot hear, and how to set up a plan before levy notices start. A representative can review each of these before the CP504 arrives.
Publication 1660 allows self-representation at CAP and CDP and also names attorneys, CPAs and people enrolled to practice before the IRS as permitted representatives, authorized on Form 2848. Where the credentials differ is covered in our attorney, CPA and enrolled agent comparison. The Taxpayer Advocate Service, an independent organization within the IRS, and Low Income Taxpayer Clinics offer free help.
Related guides
Frequently Asked Questions
What is a CP503 notice?
It is the second IRS reminder about an unpaid balance. The IRS says it mails a CP503 when it has not heard from you and no payment has followed the earlier notices.
Can the IRS levy my bank account after a CP503?
The CP503 page warns about a lien filing, not a levy. Levy language starts with the CP504, and the IRS hearing FAQ says most levies wait for an LT11 or Letter 1058, which carries 30 days to request a Collection Due Process hearing.
What happens after a CP503 if nothing is paid?
The next notice is the CP504, which the IRS calls a Notice of Intent to Levy. Ten days after that kind of notice, the failure-to-pay penalty rises from 0.5% to 1% a month under 26 U.S.C. § 6651(d).
Can I appeal a CP503?
The CP503 page mentions the Collection Appeals Program before collection action. Publication 1660 says CAP covers liens, levies and installment agreement decisions, cannot be used to contest how much is owed, and ends without court review.
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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.
Sources
- IRS: Understanding your CP503 notice
- IRS CP501 page
- IRS CP504 page
- IRS hearing FAQ (Collection Due Process)
- Levy statute, 26 U.S.C. § 6331
- Penalty statute, 26 U.S.C. § 6651
- IRS failure-to-pay penalty page
- Notice 746, penalty and interest
- IRS release on fourth-quarter 2026 rates
- Collection Appeal Rights (Publication 1660)
- The IRS Collection Process (Publication 594)
- IRS installment agreements page
- IRS hardship delay page
- IRS settlement offers page
- How IRS employees contact you
- Search IRS notices and letters
- About Form 2848
- Taxpayer Advocate Service home
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