IRS Letter 3641C
Notice of Penalty or Interest
IRS Letter 3641C is a notice informing you that the IRS has charged penalties, interest, or both to your tax account. This typically results from a late payment, late filing, underpayment, or failure to respond to prior notices.
The IRS uses this letter to explain why the additional charges were added and how they were calculated.
▸ Why Did I Receive Letter 3641C?
You received this letter because:
You filed or paid taxes late
You underpaid your estimated taxes
You requested a refund or adjustment, but interest or penalties applied
The IRS is responding to a request for penalty abatement (approval or denial)
▸ What’s in the Letter?
Letter 3641C will generally include:
A description of the penalty or interest assessed
The tax year and type of tax affected
The reason for the charge (e.g., late payment, underreporting, etc.)
A breakdown of the amounts added to your balance
- In some cases, this letter is also used to explain adjustments made after a taxpayer requested penalty relief.
▸ What Should You Do?
Review the details. Make sure you understand the reason for the penalty or interest.
Check your records. If you believe the charge is incorrect, gather documentation.
Pay the amount if you agree and want to avoid additional interest.
Consider requesting penalty abatement if this is your first time or circumstances warrant relief.
▸ When to Call a Tax Attorney
Some penalties are eligible for reduction or removal, but only if you act quickly. A tax attorney can help you:
Determine if you qualify for penalty abatement or interest relief
File a proper appeal or written protest
Resolve disputes that led to the charges
Minimize the risk of future penalties by addressing the root cause
▸ Don’t Pay More Than You Should
If you’ve received IRS Letter 3641C and don’t understand or agree with the penalty, don’t ignore it.
Call Scammahorn Law Firm at (903) 595-1000 or fill out this quick form to schedule a consultation and get peace of mind.