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Last Updated: 12/18/2017

Penalty and Interest Rates

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If you file or pay late, or if you pay by check and you're required to pay electronically, we may assess penalties and interest.​ 

If you:​

​We'll assess:

​The rate or amount will be:

don't file your return by the due date​ a Late File penalty​ 5% of any unpaid tax
don't pay your tax due by the due date​ ​a Late Payment penalty ​5% of any unpaid tax for each 30-day period (full or partial) that your payment is late, up to 15%
​are required to make electronic payments but paid by check ​a Payment Method penalty ​5% of any payments that were not made electronically
don't pay your tax due by the due date ​Interest ​​for 2018, 4% of the unpaid tax and penalty from the return due date until the tax is paid

 Interest Rates

Year​ ​Rate
​2018 4%
​2017 ​4%
​2016 ​3%
​2015 ​3%
​2014 ​3%
Year​ ​Rate
​2013 ​3%
​2012 3%​
​2011 3%
​2010 3%
​2009 5%