Understanding your CP543 Notice


What this notice is about

This notice is sent to tell a payer of interest or dividend income to start backup withholding on a payee (taxpayer). 

What you need to do

  • Start backup withholding within 30 days of receipt of the notice. 
    • Failure to withhold can result in a tax liability and criminal or civil penalties.
  • Report your withholding on Form 945, Annual Return of Withheld Federal Income Tax.
  • Protect the payee’s (taxpayer’s) information or you could be subject to civil damages for unauthorized disclosure (Internal Revenue Code Section 7431).  

You may want to

Frequently asked questions

What is backup withholding?
Backup withholding is withholding on mostly interest and dividend income that the payer will withhold when we instruct them to do so.     

What is the backup withholding rate?
The current rate is 24% and can increase or decrease with the tax laws. 

How long will the payer continue backup withholding?
The payer should continue until we instruct them to stop or until the payee provides written certification from us that they’re no longer subject to backup withholding.

Need Help?