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In the IRS’s own words · not reviewed by VALID

CP503J notice explained, in the IRS’s own words

You received this notice because we haven’t heard from you, and you still have an unpaid balance for your Employer Shared Responsibility Payment (ESRP).

Read the full CP503J page on irs.gov ↗

Quoted from www.irs.gov/individuals/understanding-your-cp503j-notice, read October 15, 2026 · fingerprint 910abec954d4

What this notice is about

You received this notice because we haven’t heard from you, and you still have an unpaid balance for your Employer Shared Responsibility Payment (ESRP).

What you need to do

  • Review your notice for the amount you owe, the due date, and your payment options.
  • Pay the amount you owe by the due date shown on the notice.
  • Make a payment plan if you can't pay the full amount you owe.
  • Call us at the number shown on your notice if you disagree.

You may want to

  • View information pertaining to your tax account.
  • See our ESRP question and answers and sections 54.4980H-4 and 54.4980H-5 of the ESRP regulations.
  • Visit Affordable Care Act and HealthCare.gov.

How much time do I have?

You must pay the entire balance by the due date shown on your notice to avoid additional interest.

What happens if I don't pay or respond to this notice?

If you don't pay the amount due, make payment arrangements, or contact us at the toll-free number on your notice, you may receive a Notice of Federal Tax Lien or we may seize or levy your property. A tax lien is a public notice that the IRS has a claim on your property due to unpaid taxes, which can impact your credit.

What happens if I paid the balance and/or established an installment agreement?

Payments may take time to post to your account. If you recently paid your balance in full, you can disregard this notice. Sign in to your online account and select View Balance Details to check your current balance and payment history.

If you already have an approved installment agreement, continue making payments as agreed. If you applied for an installment agreement but it hasn’t been approved yet, pay as much as you can now to reduce additional interest.

What if I don't agree or have questions?

If you don't agree or have questions about this notice, contact us immediately at the toll-free number shown on your notice. Please have your paperwork (such as cancelled checks, amended return, etc.) ready when you call.

What to do next

  • Write down the date on the letter today.
  • Look the number up on irs.gov yourself. Don’t trust a link or phone number from anyone else.
  • If it says you owe money or proposes changes to your return, take it to a licensed CPA, EA or tax attorney before that date.

Not advice. Not a filing. Verify with a licensed professional. Rules change by year and facts.

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