What Are IRS Notices CP501 and CP503, and What Should Expats Do?

A CP501 is the first reminder the IRS sends when a CP14 balance-due notice goes unpaid. A CP503 is the second reminder. According to the IRS, both notices restate the original balance plus any additional penalties and interest that have accrued since the CP14 was issued.

• CP501 is a reminder, not a new assessment — it means the IRS has not received payment or a response to your CP14
• CP503 is the second reminder and warns that continued inaction may result in enforcement, including a federal tax lien
• Expats often receive these notices late because overseas mail delivery can take four to eight weeks
• You can still resolve the balance at this stage by paying, setting up a payment plan, or disputing the amount

Where CP501 and CP503 fit in the IRS collection sequence:

How to respond to a CP501 or CP503:

• If you agree with the balance, pay online through IRS Direct Pay, request an installment agreement (Form 9465), or submit an Offer in Compromise if you cannot pay the full amount.
• If you disagree, check whether the FEIE or FTC should reduce or eliminate the balance. File an amended return (Form 1040-X) with the correct exclusion or credit, and reference the notice number in your cover letter.

Do not wait for a CP504. Responding at the CP501 or CP503 stage keeps more options open and avoids the risk of a federal tax lien. For help resolving an IRS balance-due notice, Greenback can help.