Where is my uninvested cash held?

Different deposit methods may be available to you depending on the country in which your bank account is held and the Interactive Brokers entity your trading account was opened under. 

Deposit Methods Only Available to Clients of Interactive Brokers Hong Kong Ltd (IBHK)…

Cash accounts purchase assets based on the settled cash value in your account. Margin accounts can purchase assets based on the unsettled cash value in your account. Unlike a margin account, a cash account cannot borrow money from Interactive Brokers to purchase assets…

Different deposit methods may be available to you depending on the country in which your bank account is held and the Interactive Brokers entity your trading account was opened under. 

Deposit Methods Only Available to Clients of Interactive Brokers Hong Kong Ltd (IBHK)…

Interactive Brokers does not allow international ACH transactions between a bank account held at a US bank and a bank account held at a Canadian bank. Since Interactive Brokers Canada Inc. deposits its clients' cash in bank accounts with Canadian banks, an ACH transaction from a US bank is not an acceptable funding method. If you are attempting to fund from any location outside of Canada, Bank Wire is the only method available…