IRS notice

IRS Notice CP503: Second reminder: immediate action needed

See if you qualify or call (833) 899-0099

What it means

The IRS hasn’t heard from you about an unpaid balance. This is the step before an intent-to-levy notice.

What to do now

Act now. Resolving it at this stage keeps the IRS from moving to levy notices.

Deadline

Pay or respond by the date on the notice. Always go by the date printed on your notice.

Last updated October 15, 2026.

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What waiting costs

IRS penalty and interest calculator

What's your situation?
Your balance
Tax owed$10,000
Penalties & interest$1,345
Total you'd owe today$11,345
Failure to file$0
Failure to pay$600
Interest$745

Estimate only, not tax advice. Federal tax and penalties at the IRS's standard rates, before credits and state taxes. Unfiled-year tax uses 2025 brackets and assumes W-2 income had taxes withheld. Interest uses the IRS rate of 7% a year (October to December 2026), compounded daily; the rate resets every quarter.

Stop the clock: see if you qualify
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