There's a phenomenon in Australian banking that costs homeowners billions of dollars every year. It's called the "loyalty tax" - and it works like this: lenders offer their best rates to new customers to win their business, while quietly letting existing customers sit on higher rates year after year.
The ACCC has confirmed it. The RBA has written about it. And yet, most Australians don't act on it - either because they don't know, they assume it's too hard to switch, or they're not sure if it's worth it.
Here are five signs that you're paying too much right now - and what you should do about each one.