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Responding to an IRS CP501 Reminder

CP501 is a first reminder. Ignore it and CP503, then CP504 come next.

Herman Viglione, EA
Written by
Herman Viglione, EA
Updated April 22, 2026
30-day response window

IRS notices have short response windows. Call the office today if your deadline is close.

What it means

The CP501 is the first reminder of an unpaid balance, typically 5 weeks after the CP14. Interest and failure-to-pay penalties continue to accrue.

What to do

Same options as CP14: pay, set up an installment agreement, request CNC status, or dispute. The longer you wait, the harder it becomes. By CP504 the IRS is preparing to levy your state refund.

Have a specific situation?
Call the office and a human answers.

Common questions

How much time until the next notice?
Typically 5-6 weeks to CP503, then another 5 weeks to CP504. The collection ladder accelerates from CP504 forward.

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