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IRS Notice CP504B: Business Final Warning

Notice CP504B is the business-taxpayer equivalent of CP504 — a final notice of intent to levy sent to businesses with unpaid federal tax liabilities. It is typically sent for unpaid business income tax, payroll tax (Form 941), or excise tax

By David Whitaker·3 min read·Updated April 23, 2026
High Urgency
Notice CP504B is the business-taxpayer equivalent of CP504 — a final notice of intent to levy sent to businesses with unpaid federal tax liabilities. It is typically sent for unpaid business income tax, payroll tax (Form 941), or excise tax. Like CP504 for individuals, CP504B warns of imminent collection action including seizure of state tax refunds, bank accounts, and business assets.

Payroll tax and the Trust Fund Recovery Penalty

If CP504B relates to unpaid payroll taxes — particularly the withheld employee income tax and FICA — there is urgent personal liability exposure. Under IRC Section 6672, the IRS can assess the Trust Fund Recovery Penalty (TFRP) personally against business owners, officers, bookkeepers, and other "responsible persons." The TFRP survives business closure and bankruptcy. Engage a tax professional immediately if CP504B involves payroll taxes.

How to respond to CP504B

The options parallel CP504: pay in full, set up an installment agreement (with additional scrutiny for businesses), apply for an Offer in Compromise (rare for operating businesses with ongoing tax obligations), or seek Currently Not Collectible status (difficult for operating businesses). For most businesses facing CP504B, an installment agreement with strict ongoing compliance is the practical path.

In-business trust fund installment agreements

For businesses with payroll tax debt up to $25,000 and strict ongoing compliance, the IRS offers an in-business trust fund installment agreement. Terms require full current-tax-deposit compliance. Any slip creates default and immediate collection resumption.

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Frequently asked questions

What is the Trust Fund Recovery Penalty?+

The Trust Fund Recovery Penalty (TFRP) under IRC Section 6672 assesses the unpaid trust fund portion of payroll taxes (withheld income tax + employee FICA) personally against responsible persons — business owners, officers, bookkeepers who had authority to pay. The TFRP survives business closure.

Can I close my business to avoid CP504B collection?+

Closing the business does not eliminate payroll tax liability assessed via TFRP. Corporate-level income tax debt generally ends with the corporation, but payroll trust fund taxes follow responsible persons personally. Consult a tax attorney before closing.

Is an Offer in Compromise available for business taxes?+

Yes, but it is more complex than for individuals. Operating businesses with ongoing obligations face strict scrutiny. Closed businesses can more easily pursue OIC. For TFRP assessed personally, individual OIC procedures apply.

About the author

D

David Whitaker

Tax Resolution Specialist · Fresh Start Division Editorial

David Whitaker covers IRS tax resolution for Fresh Start Division. His reporting focuses on installment agreements, Collection Due Process, Revenue Officer cases, and the procedural requirements taxpayers face when resolving federal tax debt.

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