3155 East Southern Avenue Ste 101
Mesa, AZ 85204
480-926-9300

IRS Interest Rate Table

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Interest is calculated is based on how much tax you owe. Interest rates change every three months. Currently (as of December 2015) the interest rate of under payment of tax is 3.13% per year. The interest is calculated for each day your balance due is not paid in full. 

Click here to be transfered to the IRS website for more detailed information on their interest rates and to view the IRS interest rate tables.