IRS letter help
Got an IRS CP501 Notice? What It Means and What to Do
A CP501 means the IRS has not received payment, or a response, after its first bill. It is still an early notice, and every option you had at the CP14 stage is still open.
Reviewed by LaToya Clark-Thompson, FounderLast updated
What this letter is
The CP501 is a reminder that you still owe a balance on one of your tax accounts. The IRS sends it because it has not received payment or a response to its earlier notice, usually a CP14. It shows the amount owed, the payment due date and your options, and its bill summary shows the interest charged so far.
It is not a levy notice and it does not mean collection action has started. It is a sign the account is moving along the standard collection path.
Why you got it
- The first bill was not paid in full by its due date
- You set money aside but the payment was not made, or went to a different year
- The first notice went to an old address and you never saw it
- You meant to call about the balance and the date passed
If you did not see the first notice, check whether the IRS has your current address. Notices go to the address on your most recent return unless you have told the IRS otherwise.
What to do now
- Check the balance against your return and your payment records for that year
- If it is right and you can pay, pay online or mail a payment with the bottom portion of the notice so it is credited to the right account
- If you cannot pay in full, apply for a payment plan online or through your IRS online account, or by mailing Form 9465
- If you disagree, call the toll-free number on the notice, with supporting records ready
- If the return itself was wrong, the correction is an amended return on Form 1040-X, not a phone call
The notice also explains how to request a Collection Appeals Program review before collection action begins. Follow its instructions if you think the collection itself is wrong rather than the tax.
What happens if you ignore it
Interest continues until the balance is paid, and the failure-to-pay penalty keeps growing. The IRS states that if the balance stays unpaid it can file a notice of federal tax lien, a public notice to creditors that the government has a claim on your current and future assets. The next letters in the sequence are the CP503 and then the CP504 notice of intent to levy.
The IRS also says that contacting it by the due date may allow the failure-to-pay penalty to be removed, depending on your situation. Waiting removes that option.
How we help
We reconcile the notice with your return and the IRS account transcript so you know whether the balance is right before you pay it. If it comes from an error on the return, we prepare the amended return. If other years are unfiled, we prepare them through back tax filing, because being current on filing is a condition of most payment plans.
Matters that need professional representation before the IRS go to the independent licensed CPA we work with, with our office coordinating. See tax resolution.
What to send us
- A photo or scan of every page of the CP501, and the CP14 if you have it, through the client portal
- Your return for the year on the notice
- Records of any payments made toward that year
- A note of what you can realistically pay each month, if you think a plan is needed
Frequently asked questions
What is the difference between a CP14 and a CP501?
The CP14 is the first bill for a balance. The CP501 is the reminder that follows when that bill was not paid or answered. The balance on the CP501 is usually higher, because interest and the failure-to-pay penalty have kept accruing. Your options are the same at both stages: pay, set up a payment plan, or call the IRS if the figure is wrong.
Will the IRS file a lien after a CP501?
The IRS says it can file a notice of federal tax lien if the balance stays unpaid or you do not respond. A lien is a public record that lenders and title companies can find, and it can complicate borrowing and the sale or refinancing of property. Paying, or setting up a plan the IRS accepts, is what keeps the account from moving further. Tax lien vs. tax levy explains the difference.
Can I set up a payment plan after getting a CP501?
Yes. Most individuals can apply online or through their IRS online account, and the Simple Payment Plan does not require a financial statement when you are current on filing and payments and the balance is within the IRS limit. Larger or business balances may need a different plan. See IRS payment plan options.
I never got the first IRS notice. Does that change anything?
It does not change the balance, but it is worth fixing why. Notices go to the address on your latest return unless you have updated it with the IRS, so a move is the usual cause. Deal with the CP501 by its due date, and update your address so the next letter reaches you.
Not the question you had? The full tax FAQ covers more ground, and our client reviews say what the work is actually like.
Related pages
CP14 notice
The first bill for a balance due. How to check the figure and pay or set up a plan by the date on the notice.
Learn moreCP503 notice
The second reminder. The last letter before the intent-to-levy notice, so the one to act on.
Learn moreCP504 notice
Notice of intent to levy. The IRS can take a state refund and warns about wages and bank accounts next.
Learn moreIRS payment plan options
The Simple Payment Plan, other installment agreements, short-term plans, hardship status and offers.
Learn moreHow to respond to an IRS letter
Check it, decide whether you agree, gather support, reply by the date, and keep proof.
Learn morePart of IRS & SC Letter Help. Not sure which service fits? Answer a few questions.
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