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When should I open a “Line of credit” at my bank?
The only really good reason to open a line of credit is that you want to buy something that you don't have money for. That's got its own risks - see plenty of other places to see warnings about not borrowing too much. The only other reason is that you might want to use a line of credit as your emergency fund. The usual way of doing this is to keep the money in an easily acccessible savings account - but such accounts usually pay rather now interest, and there is an argument for instead investing your emergency money in a higher-interest but less-accessible fund and using a line of credit to tide you over until you can extract the money. I'm worried about the comment that you can "deduct my interest on my tax returns". That is usually only possible if you are borrowing money to invest. It sounds as if your banker is going to persuade you to not only open a line of credit, but then invest that money in something. Be aware that this kind of 'leveraging' is much higher risk than investing money you already own.