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IRS CP501: Reminder — Balance Due
Straight answer: A CP501 is a reminder notice: the IRS billed you (usually via CP14), didn't receive payment, and is telling you the balance is still due. It is the second step in the collection notice sequence.
How many days do I have to respond to a CP501?
21 days from the date printed on the notice (not the day you opened it). Respond within 21 days. The sequence escalates to CP503, then CP504 (intent to levy state refund), then final-notice levy letters.
Your response deadline is approximately — days from today.
What should I do right now?
- Confirm the balance is accurate.
- Pay online or establish an installment agreement.
- If you dispute the debt, respond in writing now — disputes get harder as the sequence escalates.
The costly mistake people make with a CP501
Waiting to 'deal with it later.' Each escalation adds penalties, and by CP504 the IRS is authorized to take your state tax refund.
Do I need professional help with a CP501?
Get help if the total across all years is over $10,000 or you can't afford any payment plan — you may qualify for hardship status or an offer in compromise.
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