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Office of Tax and Revenue

OTR Interest Calculator

Use this calculator to compute the interest on your unpaid DC Tax.

Amount of Tax Due:
Tax Return Due Date:
/ /  (mm/dd/yyyy)
Payment Date:
/ /  (mm/dd/yyyy)
Interest Due:

How is interest calculated?
Interest is calculated on an annual basis at the following rates:
Before January 1, 2001, the interest rate was 18%, simple interest.
From January 1, 2001 to December 31, 2002, the interest rate was 13%, simple interest.
From January 1, 2003 to current, the interest rate is 10%, compounded daily.