2026 UPDATE: We are reviewing guidance against current IRS publications, forms, and collection standards.

CP501Medium Urgency

IRS Notice CP501: First Reminder - What to Do When You Get This

IRS Notice CP501 is a reminder that you have an unpaid tax balance. Learn what it means, how to respond, and your options before the IRS escalates collection.

Last updated: January 15, 2026

What This Notice Means

Notice CP501 is the first reminder notice in the IRS collection sequence. If you received a CP14 and didn't respond or pay, this is the IRS's way of saying "we noticed you haven't addressed this yet." The balance has likely grown due to additional penalties and interest.

Immediate Steps to Take

  1. 1Compare the new balance to your CP14 - note the increase from penalties/interest
  2. 2Don't panic - you still have time and options
  3. 3Choose a resolution path: pay in full, payment plan, or hardship status
  4. 4Respond within 10 days to prevent escalation to CP503

Understanding Your CP501 Notice

The CP501 is essentially a reminder notice with updated balance information. Key things to note:

  • This is not a final notice - You still have time to resolve this before serious collection action
  • The balance has increased - Additional penalties and interest have been added since your CP14
  • Your options are still open - All resolution paths (payment plans, hardship, OIC) remain available

The IRS typically sends CP501 about 5 weeks after CP14 if no response or payment was received.

How to Respond to CP501

Your response options are the same as with CP14, but time is becoming more important:

  • Pay in full - Stops all penalties and interest immediately
  • Set up an installment agreement - Apply online at IRS.gov for balances under $50,000
  • Request Currently Not Collectible status - If you genuinely can't pay anything right now
  • Call the IRS - The number on your notice can help you understand options

Pro tip: Even if you can't pay in full, making a partial payment shows good faith and may help with penalty abatement requests later.

Where You Are in the Collection Process

Understanding the IRS collection timeline helps you know how urgent your situation is:

  1. CP14 - Initial balance due notice ✓ (You received this)
  2. CP501 - First reminder ← You are here
  3. CP503 - Second reminder (more urgent tone)
  4. CP504 - Intent to levy (serious - can affect state refunds)
  5. LT11/Letter 1058 - Final notice before levy action

You're still early in the process. Acting now prevents escalation to more serious notices and preserves all your options.

Frequently Asked Questions

Is CP501 serious?

It's a warning sign but not yet critical. CP501 is a reminder that your balance remains unpaid. You still have all resolution options available, but you should act soon to prevent escalation to CP503 and eventually CP504.

Why did my balance increase from CP14 to CP501?

The IRS adds the failure-to-pay penalty (0.5% per month) and interest (currently around 8% annually, compounded daily) to unpaid balances. Even a few weeks can noticeably increase what you owe.

Can I still set up a payment plan after receiving CP501?

Yes, absolutely. All payment plan options remain available. For balances under $50,000, you can even set up an installment agreement online without calling the IRS.

What happens if I ignore CP501?

You'll receive CP503 (second reminder) in about 5 weeks, then CP504 (intent to levy). CP504 is serious because the IRS can take your state tax refund and begin other collection actions.

Need Help With Your CP501 Notice?

Licensed tax professionals can analyze your notice, explain your options, and handle the IRS response for you. Many offer free consultations.

Get Professional Help

Authority Citations

This content is based on the following official IRS sources. All links open in a new tab.

Information current as of 2026. Tax laws change frequently. Verify with official IRS sources before taking action.