I have multiple accounts. Do you calculate interest combining them?

Margin interest at Interactive Brokers (IBKR) is calculated and charged as follows:

Calculation Method…

IBKR calculates and pays interest on cash balances in accounts as follows:

Interest Eligibility and Rates:…

Generally, interest is charged and/or credited to the account in the currency of the respective cash balance.

Find out more on the interest and margin…

Short Sales Proceeds Interest (SSPI) is the positive interest rate IBKR pays on short stock cash proceeds according to the Securities Financing page of our website.

This is a credit to the account…