A mortgage is a loan used to buy a home or other type of real estate. When you get a mortgage, a lender gives you a large sum of money, which you agree to pay back, with interest, over a set period. It's what allows most people to buy a home without having to save up the entire purchase price in cash.

The key feature of a mortgage is that it's a secured loan. This means the property you buy acts as collateral. If you fail to make your payments, the lender has the right to take possession of the property through a process called foreclosure. This protects the lender's investment.

Your monthly mortgage payment is typically made up of four components, often remembered by the acronym PITI.

Let's break them down:

• Principal: This is the original amount of money you borrowed from the lender. Each month, a portion of your payment goes toward reducing this balance.
• Interest: This is the cost of borrowing the money, expressed as a percentage rate. In the early years of a loan, a larger portion of your payment goes to interest.
• Taxes: These are property taxes, which your local government charges to fund public services like schools and roads. Lenders often collect these taxes with your mortgage payment and hold them in an account called an escrow account. They then pay the tax bill on your behalf when it's due.
• Insurance: This refers to homeowner's insurance, which protects your home against damage from events like fires or storms. Like property taxes, insurance premiums are usually collected monthly and paid from your escrow account.

Mortgages aren't one-size-fits-all. They come in different types, primarily distinguished by how their interest rate is structured. The two most common are fixed-rate and adjustable-rate.

Another key component is the loan term, which is the amount of time you have to repay the loan. The most common terms are 15 and 30 years. A shorter term, like 15 years, means higher monthly payments but less total interest paid over the life of the loan. A 30-year term offers lower monthly payments, making it more affordable upfront, but you'll pay significantly more in interest.

The process of paying off your loan is called amortization. With each payment you make, you chip away at both the principal and the interest. However, the split between the two changes over the life of the loan.

This is why your loan balance seems to decrease so slowly in the first few years. An amortization schedule is a table that details each payment over the life of the loan, showing exactly how much goes to principal and how much to interest. Your lender will provide one when you close on your loan.

Understanding these core elements, from what a mortgage is to how your payments are structured, is the first step toward making confident financial decisions about homeownership.