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Reference Benchmark Rates

Reference Benchmark Rates


IBKR's benchmark for each currency is the reference rate around which our credit, debit, stock loan and other interest rate linked calculations are determined. IBKR uses a combination of internationally recognized reference rates (such as LIBOR and Fed Funds), bank deposit rates, and dynamic interbank rates determined from foreign exchange and money markets to calculate an IBKR Reference Benchmark rate.

For more information about IBKR Reference Benchmark click here.

For information regarding the various external reference rates that contribute to the IBKR Reference Benchmark rate click here.


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IBKR accrues interest daily and posts actual interest monthly on the third business day of the following month. For detailed examples on how we calculate interest, open the Interest Paid to You and Interest Rates Charged to You on Margin Loan Balances sections on this page.