Step 1:
Go to IB's web portal (https://www.interactivebrokers.com). Log in with your IB username and password.
Step 2:
Click "Transfer & Pay" in the menu.
Step 3: Click 'Transfer Funds'
Step 4: Click 'Make a Deposit'
Step 5: Select the currency (e.g. SGD or USD), then click 'Get Instructions'
Step 6: Fill in your bank account information. Your view might be slightly different from the one below. You may be prompted for more information regarding your bank account (e.g. Swift Code, Bank Code). Key in information relevant to your specific bank account which you want to debit money from. Key in the amount of money you wish to fund and click "Get Wire Instructions".
Step 7:
Once done, you should see a screen similar to below. Until now, you have notified IB that you will transfer funds to them. Proceed to do an inter-bank transfer to the account specified by IB. Your funds should appear in your IB account within one working day.
DISCLAIMER: The following screenshots are taken from Interactive Brokers website, provided only as a setup guidelines, and may be changed from time to time subject to Interactive Brokers discretion. Piranha Profits Pte Ltd is not responsible for any loss or damages caused by inaccuracy and misrepresentation of the information.