A mortgage is a loan used to buy a home or other piece of property. When you get a mortgage, a lender gives you a large sum of money to cover the purchase. In return, you agree to pay back that money, plus interest, over a set period. The property you buy serves as collateral for the loan, which means if you fail to make your payments, the lender can take possession of it.

Think of it as a partnership. The bank helps you buy a home you couldn't afford outright, and you pay them for that service through interest. This arrangement makes homeownership possible for many people.

Your monthly mortgage payment isn't just one thing. It's typically a bundle of four different costs, often remembered by the acronym PITI.

Here’s what each part means:

• Principal: This is the amount you borrowed. A piece of every payment goes toward chipping away at this original loan balance.
• Interest: This is the cost of borrowing the money. It's the fee the lender charges, expressed as a percentage of the loan.
• Taxes: These are property taxes, which your local government collects to fund public services like schools and roads. Your lender often collects these from you each month and holds them in an account (called an escrow account) to pay the tax bill on your behalf.
• Insurance: This refers to homeowners insurance, which protects your property against damage from things like fires or storms. Like taxes, these premiums are usually collected monthly and paid by the lender from your escrow account.

The interest you pay isn't always the same throughout the life of the loan. Mortgages generally come in two flavors based on how their interest rate is handled: fixed-rate and adjustable-rate.

Paying off a mortgage isn't as simple as dividing the total loan amount by the number of months. The process is governed by an amortization schedule, which outlines how each payment is split between principal and interest over the loan's term.

At the beginning of your loan, a large portion of your payment goes toward interest, and only a small amount reduces your principal. As time goes on, this balance shifts. Toward the end of the loan, most of your payment goes toward principal, rapidly reducing your debt. This is why you build equity slowly at first and much faster later on.

Now that you understand the fundamental parts of a mortgage, let's test your knowledge.

Understanding these core concepts—what a mortgage is, what goes into your payment, the types of interest rates, and how you pay down the loan—is the first step toward making smart financial decisions about homeownership.