IRS notices · CP504

CP504 notice: prove the plan, payment and deadline before you react.

A CP504 is more urgent than a routine balance notice. Before paying again or ignoring it, build a dated packet that shows the notice, account status, payment agreement and next deadline.

Direct answer

For CP504, the IRS directs taxpayers to review the notice, pay or set up payment options, and contact the IRS if they disagree or already acted.

Use the notice, IRS online account and payment agreement records. This page is an operational checklist, not tax, legal or financial advice.

Source base: IRS CP504 notice guidance, IRS online payment agreement and IRS online account.

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CP504 payment agreement proof checklist

Help US taxpayers organize payment-plan and account evidence after a CP504 notice. Updated 2026-07-01.

Checklist controls

Control	What to verify	Proof to save
Notice	Tax year, notice date, balance and stated action.	Full CP504 PDF or scan.
Agreement	Installment agreement status, terms and next due date.	OPA confirmation or IRS letter.
Payment	Recent payment date, method, amount and confirmation number.	Receipt plus bank record.
Account	Whether IRS online account shows balance, plan or pending credit.	Dated screenshot or PDF.
Follow-up	Call, message or written response details.	Case notes, mail/fax proof and next reminder.

Urgency

Do not wait blindly.

CP504 language can indicate collection escalation, so preserve dated proof quickly.

Agreement

Plan status matters.

A payment plan record is more useful than a vague note that you called.

Limit

Escalate when needed.

Large balances, levy risk or missed deadlines require professional help.

CP504 proof packet

Save the CP504 notice and mark the notice date, tax year and balance.
Log in to IRS online account and export or screenshot the current account view.
Pull payment agreement confirmation, monthly amount and next due date.
Attach recent payment receipt, bank debit and confirmation number.
Write one dated summary: what IRS says, what you did, and what follow-up is due.

FAQ

Is CP504 the same as CP14?: No. CP504 is a later balance-due collection notice and needs faster evidence control.
Should I set up a payment plan immediately?: Use IRS official payment options and confirm the account first; this page only organizes proof.
Is this tax advice?: No. It is a document-control checklist.

Updated 2026-07-01. This page is independent and does not replace official services, professional advice or site-specific rules.