CP501 Notice: Reminder of an Unpaid IRS Balance

A CP501 is a reminder. The IRS sends it when it has not received payment or a response after an earlier notice asking you to pay a balance on one of your tax accounts. It is not the last warning, but it is the point at which the notice begins to mention consequences.

Where the CP501 fits in the sequence

Balance-due notices tend to escalate. A first bill such as CP14 is followed by reminders such as the CP501 and CP503. After that comes a CP504 notice of intent to levy, and finally a final notice with hearing rights, such as CP90 or CP297. Seeing a CP501 means the earlier steps went unanswered, not that you have reached the end.

What to read on the notice

The notice contains a bill summary showing tax, penalties and interest, a payment due date, and a stub to return with a check. Look at three things:

1. The tax year or period. Make sure it is a year you recognize.
2. The interest and penalty lines. The IRS says interest is charged on underpayments until the balance is paid in full, and the notice shows the interest charged to date.
3. The due date. Paying the full balance by that date is how you avoid additional penalties and interest on this notice.

Your options

• Pay. Pay online or by mail with the stub. The IRS asks that you include the bottom portion of the notice so the payment is credited correctly.
• Set up a payment plan. Apply online, or request one by mail with Form 9465, Installment Agreement Request. See installment agreements.
• Dispute the amount. Call the toll-free number on the notice right away. Have supporting documents ready, such as cancelled checks or an amended return. If you made an error on the return, you may need to file Form 1040-X.
• Ask for a Collection Appeals Program hearing. The notice explains that you may request an appeal with the IRS before collection action begins. Publication 1660 describes CAP as available before or after a lien is filed and for many other collection actions. It is faster than a Collection Due Process hearing, but you cannot take a CAP decision to court.

What happens if you do not respond

The IRS can file a Notice of Federal Tax Lien. A lien is a public notice to creditors that the government has a claim on your current and future property, and it can make credit harder to get. Interest keeps growing on the unpaid amount, and additional penalties may apply. A failure-to-pay penalty applies if the balance is not paid in full, though the IRS says you may be able to have it removed depending on your situation if you contact it by the payment due date.

Common mistakes

• Treating a reminder as a courtesy. The CP501 is part of the legal collection process.
• Not calling because you cannot pay everything. Part of the point of calling is to arrange something you can afford.
• Ignoring a payment you made. If you paid after the notice date, check your Online Account and call so the IRS reflects it.
• Sending a payment without the stub or the tax year. That can cause the payment to be misapplied.

When to involve a CPA

Call a CPA if the balance spans several years, if you disagree with a penalty, or if you also have unfiled returns. A CPA can also help you decide whether a CAP appeal makes sense or whether another route is better. With a signed Form 2848, we can contact the IRS for you.

How we can help

We can check the balance against your transcripts, request penalty relief where it is available, and negotiate a payment plan. See our IRS representation services or contact us.

Frequently asked questions

General information only, not tax, legal or accounting advice for your situation. Rules, limits and deadlines change; confirm the current rules with the official source or a qualified professional before you act. Reading this page does not create a professional relationship with CPA Tax Payroll and Accounting Corp.