A line of credit is a credit account you can borrow from, repay, and borrow from again, up to a limit. That means you pay interest only on what you owe on a given day. Dynamic Banking runs on one, but a line of credit does several jobs before you ever take your first chunk.
First, it gives you access to money in an emergency. Whether it's a credit card, a personal line, or a home equity line, the money is available when you need it. Financial gurus say to hold six months of expenses in savings, and that's sound, safe advice. But it also ties up a lot of money in an account that earns almost nothing.
Second, it can reduce idle money. Idle money is cash sitting in checking or savings doing one job, which is waiting for an emergency. If a line is there, some of that cash can do a second job somewhere else, like paying down debt. That only works if the line of credit is stable and you don't use it all, because a bank can reduce a line. The post on who can close your line of credit goes through the risks.
Third, it lets you maximize cash flow. That's Dynamic Banking: paycheck parking and chunking, where your income goes into the line of credit and lowers your average daily balance. The starter move shows how.
Fourth, it lets you borrow to buy something that produces income, like a rental property, a flip, or a business expansion. Debt used that way is a tool, but it carries risk. If the property sits empty, you still owe the interest.
Fifth, it opens up your equity. Most of what you own has value locked inside it. You have three ways to reach it: sell it, take a standard loan with a fixed amount, or open a line of credit you can use again and again. A line can sit against a house, or a personal line can sit against something like a car. It lets you use the value without selling.
All five reasons are counted down in a video on why everyone should get a line of credit. If you're trying to pick which type to open, HELOC or personal line compares them.
Of those five, pick the one you'd use first and write down the dollar amount you'd need for it. That number tells you how big the line of credit should be.