A mortgage is a loan from a bank or lender where your home serves as collateral

When you take out a mortgage, you are borrowing money from a lender — usually a bank, credit union, or mortgage company — to buy a house or property. In exchange, you promise to repay that money over a set period, typically 15 to 30 years, with interest. The key difference between a mortgage and other loans is that the property itself backs the loan. If you stop making payments, the lender can take the house through a legal process called foreclosure.

You do not need to own the house outright to take out a mortgage. Most buyers put down a percentage of the purchase price — often 3 to 20 percent — and borrow the rest. That borrowed amount becomes your mortgage debt. You then make monthly payments that cover both the principal (the amount you borrowed) and interest (what the lender charges for lending you the money).

Key Takeaways

  • A mortgage is a loan secured by the property itself, meaning the lender can foreclose if you do not pay.
  • You typically borrow 80 to 97 percent of the home's purchase price and pay back the loan over 15, 20, or 30 years.
  • Your monthly payment includes principal, interest, property taxes, homeowners insurance, and sometimes mortgage insurance, depending on your down payment.
  • The interest rate you receive depends on your credit score, income, debt, and current market rates at the time you borrow.
  • Taking out a mortgage means you are responsible for maintaining the property and paying all costs associated with homeownership.

How the monthly payment breaks down

Your monthly mortgage payment is not just interest and principal. Most lenders require you to pay into an escrow account — a separate account held by the lender — that covers property taxes and homeowners insurance. If you put down less than 20 percent, you will also pay private mortgage insurance (PMI), which protects the lender if you default. All of these costs roll into one monthly bill.

Early in the loan, most of your payment goes toward interest rather than principal. As time passes, that ratio flips. On a 30-year mortgage, you might pay 60 percent interest and 40 percent principal in year one, but by year 20 it reverses. This is why paying extra toward principal early on can save you thousands in interest over the life of the loan.

Interest rates and what affects yours

The interest rate on your mortgage is not the same for everyone. Lenders set your rate based on your credit score, the size of your down payment, your income and existing debt, the length of the loan, and the current market rate for mortgages. A higher credit score typically means a lower rate. A larger down payment also improves your rate because the lender's risk is lower.

Interest rates change daily based on economic conditions. If you lock in a rate when you explore, that rate is usually may provide for 30 to 60 days while your loan is being processed. After closing, your rate is fixed for the life of the loan (in a fixed-rate mortgage) or adjusts periodically (in an adjustable-rate mortgage). A fixed rate is more predictable; an adjustable rate may start lower but can rise later.

Fixed-rate versus adjustable-rate mortgages

A fixed-rate mortgage keeps the same interest rate for the entire loan term — 15, 20, or 30 years. Your monthly payment never changes (except for taxes and insurance, which can increase). This makes budgeting easier and protects you if rates rise. Most borrowers choose fixed-rate mortgages because of this stability.

An adjustable-rate mortgage (ARM) starts with a lower interest rate for a set period — often 3, 5, 7, or 10 years — then adjusts annually or semi-annually based on market conditions. After the initial period, your payment can increase significantly. ARMs are riskier because you cannot predict future payments, but they can save money if you plan to sell or refinance before the rate adjusts.

What happens when you close on a mortgage

Closing is the final step where you sign all the paperwork and the lender transfers the money to the seller. You will receive a Closing Disclosure at least three business days before closing — a document that lists the final loan terms, interest rate, monthly payment, and all costs you are paying upfront. Review it carefully against your earlier Loan Estimate to catch any changes.

At closing, you pay closing costs, which typically range from 2 to 5 percent of the loan amount. These cover the lender's fees, title insurance, appraisal, credit report, attorney fees, and recording fees. Some lenders allow you to roll closing costs into the loan, but that increases the amount you borrow and the total interest you pay. After closing, the deed is recorded in your name and you own the house — though the lender holds a lien against it until the loan is paid off.

Your responsibilities as a mortgage borrower

Taking out a mortgage means you are responsible for far more than just the monthly payment. You must maintain homeowners insurance at all times — the lender requires this and will force-place insurance (at a higher cost) if you let it lapse. You are also responsible for all property taxes, which the lender collects through escrow. If you live in an area with a homeowners association, you must pay those fees as well.

You are also responsible for maintaining the property. The lender can inspect the home and require repairs if it falls into disrepair, since the property is their collateral. If you fail to pay property taxes or maintain insurance, the lender can declare you in default and begin foreclosure proceedings, even if you are current on your mortgage payment.

What refinancing means and when people do it

Refinancing is taking out a new mortgage to pay off your existing one. People refinance for several reasons: to lower their interest rate if rates have dropped, to shorten the loan term (paying it off faster), to switch from an ARM to a fixed rate before the rate adjusts, or to tap into home equity for cash. Refinancing involves closing costs again, so it only makes financial sense if the savings outweigh those costs.

For example, if you have a 30-year mortgage at 5 percent and rates drop to 3.5 percent, refinancing to a new 30-year loan at the lower rate reduces your monthly payment. If you refinance to a 15-year mortgage instead, your payment may stay similar but you pay off the house in half the time and save years of interest. Always calculate the break-even point — how many months until your savings exceed the closing costs — before refinancing.

Frequently Asked Questions

What is the difference between a mortgage and a home loan?

These terms are used interchangeably. A mortgage is a specific type of home loan where the property itself secures the debt. All mortgages are home loans, but not all home loans are mortgages — for example, a home equity line of credit is a home loan but not a mortgage in the traditional sense.

Can I pay off my mortgage early without a penalty?

Most mortgages have no prepayment penalty, meaning you can pay extra toward principal or pay off the entire loan early without fees. However, some older mortgages or certain loan types may include prepayment penalties. Check your loan documents or ask your lender before making extra payments.

What happens if I miss a mortgage payment?

Missing one payment typically triggers a late fee and a note on your credit report. After 30 days, the lender reports the delinquency to credit bureaus. After 120 days of missed payments, foreclosure proceedings usually begin. Contact your lender when ready if you cannot pay — many offer forbearance or loan modification options.

Do I need a down payment to take out a mortgage?

Most lenders require a down payment of at least 3 to 5 percent, though some government-backed loans (like VA or USDA loans) allow zero down. The larger your down payment, the lower your interest rate and the smaller your monthly payment. A down payment below 20 percent requires you to pay private mortgage insurance.

How long does it take to get approved for a mortgage?

The process typically takes 30 to 45 days from process to closing, though it can be faster or slower depending on how quickly you provide documents and how busy the lender is. The lender will order an appraisal, verify your income and employment, and pull your credit report. Delays often happen when documents are missing or when the appraisal comes in lower than the purchase price.