What Is a Mortgage?

August 2026

<p>What Is a Mortgage?</p>

Buying a home often starts with one big question: How does a mortgage actually work? From loan types to interest rates, there’s a lot to take in — and it all affects how much you pay. Understanding the basics may help you make more informed decisions as you move toward homeownership.

What Is a Mortgage?

A mortgage is a loan that helps you buy a home or other real estate. The house or property backs the loan, which means the lender can legally take it if you stop making payments. This legal claim is called a lien.

You can pay back most mortgages over many years through regular monthly payments. Common loan terms are for 15 or 30 years.

What Are the Types of Mortgages?

Mortgage loans come in different types. The one you choose affects your upfront costs, how much you can borrow, and what you’ll pay over time.

Most fall into three categories:

  • Conventional: Standard home loans that follow set rules from major housing agencies. 
  • Government: Loans backed by the government to help specific groups of buyers.
  • Affordable and special programs: Loans and assistance programs designed for certain buyers or communities.


Each type fits different situations. If you qualify for more than one, compare offers and total costs before you choose.

Conventional loans

Conventional loans are the most common type of mortgage. They’re not backed by a government agency. These often cost less over time, but they might be harder to qualify for.

Common types of conventional loans include:

  • Fixed-rate mortgage: This loan keeps the same interest rate from start to finish, which may make budgeting easier. These loans may start with a slightly higher rate than adjustable options.
  • Adjustable-rate mortgage (ARM): This loan starts with a lower rate for a set period, then can change over time based on market conditions. Since payments can change, costs are less predictable. These might cost less at first but more over time.


Government loans

Government-backed loans help buyers who need more flexible rules. Common types include:

  • FHA loans: The Federal Housing Administration insures loans that allow low down payments, sometimes as low as 3.5%. Lenders may accept lower credit scores than most conventional loans. You may need mortgage insurance for the life of the loan, and it might cost more over time.
  • VA loans: These are for eligible veterans, servicemembers and surviving spouses. They often don’t require a down payment or monthly mortgage insurance. You may have an upfront fee instead. There’s extra protection if you have trouble making payments.


Affordable and special programs

Special programs can help make homeownership more affordable for certain people. These often work alongside regular mortgage loans.

Types of special programs may include:

  • State and local housing programs: States, cities, counties or nonprofits offer these. They often help first-time homebuyers or low- to middle-income families with down payments or closing costs. Some support teachers, firefighters or other public service workers..
  • Community-based credit programs: Some lenders offer these. They help low- to middle-income borrowers in specific communities. The terms and rules vary by program.
  • Medical professionals’ programs: Medical professionals have unique financial needs that require thoughtful solutions. Some lenders offer mortgages that are designed to align with medical professionals’ existing financial circumstances and goals.

How Does a Mortgage Work?

Similar to a loan you might need to purchase a vehicle, a mortgage helps you purchase real estate. You pay this back over time with monthly payments.

Each payment is split into a few parts:

  • Principal (loan balance): This is the part of your payment that goes toward paying back the money you borrowed. Paying down the principal lowers how much you pay interest on.
  • Interest and APR (Annual Percentage Rate): Interest is the cost of borrowing money. It's what the lender charges you for the loan. The APR is a broader measure of the mortgage's cost. It includes:
    • The interest rate 
    • Certain lender fees 
    • Mortgage points (if any)
    • Other finance charges required to obtain the loan
  • Escrow (taxes and insurance): Most monthly payments also include money for property taxes and homeowner’s insurance. The lender saves these in an account and pays them on your behalf.


What's a mortgage interest rate and APR?

An interest rate is the extra money you pay a lender for borrowing money. The rate affects how much your monthly payment is and how much you pay for the home. A higher rate means higher payments and more total cost. A lower rate means lower payments and less cost overall. When you’re looking at different mortgage options and interest rates, make sure to compare the APR specifically, as this reflects the true cost of borrowing.

What’s Mortgage Insurance?

Mortgage insurance is extra protection for the lender, if the borrower stops making mortgage payments and defaults on the loan. Typically, some type of mortgage insurance is required if you buy a home with a small down payment (usually less than 20% of the home’s purchase price).

You can pay mortgage insurance as part of your monthly payment, sometimes as a fee at closing or both. If you fall behind on your mortgage, this insurance helps the lender recover their money. But it doesn’t protect you from losing your home.

The cost and type of mortgage insurance depend on your loan:

  • Conventional loans: These may use private mortgage insurance (PMI). You might be able to cancel it later.
  • FHA loans: These require mortgage insurance for all borrowers.
  • VA loans: These don’t have monthly mortgage insurance. You’ll have an upfront fee instead.

Can I Pay Off a Mortgage Early?

Yes, it’s possible to pay off your mortgage early. But whether it’s a good idea depends on your situation.

Paying it off may save you money on interest and can give you peace of mind because you no longer have a monthly payment. But, using extra money to pay off your loan means you may have less cash for savings, emergencies or investing. While rare, some loans may charge a prepayment penalty for paying off a mortgage early. If you’re thinking about this, it’s important to check your loan agreement first (or call your lender), to see if there is a prepayment penalty – and how much it may be – so you can decide if it’s worth it in your situation.

Try this calculator to see the difference in your payments with early mortgage payoffs.

What Happens If I Miss a Mortgage Payment?

After you miss a payment, your mortgage company (called a servicer) must try to contact you within about a month to talk about what’s going on. You won’t lose your house after one missed payment. But it’s important to act quickly and contact your servicer.

Within about 45 days, the servicer will send you a letter explaining help options that may be available. When you make payments late, you’ll get late fees. Late payments can have a negative impact on your credit score. For full details on when late fees are charged, and how much they are each time, contact your loan servicer or check your loan agreement.

If you let your servicer know you’re struggling and apply for help early, they’ll review options to prevent foreclosure. Foreclosure is the process where a lender takes back real estate because the borrower didn’t make their payments. The lender may sell the home to recover the owed money.

Options available to help you avoid foreclosure include:

  • Forbearance: This pauses or lowers your payments for a short time.
  • Loan modification: This changes your loan to make payments more affordable.
  • Repayment plans: These, along with other options, may help.


By law, a servicer can’t start foreclosure until you’re more than 120 days late. Even then, submitting an application for financial hardship or hardship relief assistance may pause foreclosure while they review your options. That exact name and type of help available may vary by lender and the options available to you. That’s why the sooner you ask for help, the more options you may have. KeyBank's restrictions may apply.

Where Do I Get a Mortgage?

You can get a mortgage from a bank, credit union or mortgage company. 

You may work with: 

  • A loan officer: They work directly for a bank or lender. They help you apply for a mortgage and explain the loan options that their company offers.
  • A mortgage broker: This is someone who helps you shop for a home loan. They work with many different lenders and help you compare loan options, rates and fees. They help you find a lender that fits your needs.


Working with an experienced guide may make the homebuying process more manageable. KeyBank mortgage loan officers are here to walk you through every step. They can answer your questions, explain your options and help you make smart choices that fit your needs.

If you’re thinking about getting a mortgage, consider reaching out to a KeyBank mortgage loan officer to start the conversation and explore your options.

Content provided for informational and educational purposes only and is in no way to be construed as financial, investment, or legal advice. We cannot and do not guarantee their applicability or accuracy in regard to your individual circumstances. All examples are hypothetical and are for illustrative purposes. We encourage you to seek personalized advice from qualified professionals.

NOTICE: This is not a commitment to lend or extend credit. Conditions and restrictions may apply. All home lending products, including mortgage and home equity lines of credit, are subject to credit and collateral approval. Not all home lending products are available in all states. Hazard insurance and, if applicable, flood insurance is required on collateral property. Actual rates, fees, and terms are based on those offered as of the date of application and are subject to change without notice.

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1-800-KEY2YOU® (539-2968)

Dial 711 for TTY/TRS

Clients using a relay service:
1-866-821-9126

Schedule an Appointment

Talk to a Branch Manager in your neighborhood.

Schedule an appointment now