How Does a Mortgage Work?

Written by Theresa Stevens

Written by Dennis Ceizyk

Edited by Anna-Louise Jackson

Updated on:

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A mortgage is likely to be the biggest, longest-term loan you’ll ever take out. The more you understand how a mortgage works, the better equipped you’ll be to choose the mortgage that’s right for you when buying a home.

Key takeaways

A mortgage allows you to buy a home without paying the entire purchase price upfront.
You typically repay a mortgage — with interest — over 10, 15 or 30 years.
Mortgage loans are secured by the home, meaning the lender can take your property if you stop making payments.
You’ll need to meet specific credit score and income requirements to qualify for a mortgage.

What is a mortgage?

A mortgage is a loan you get from a lender to finance a home purchase. When you take out a mortgage, you promise to repay the money you’ve borrowed at an agreed-upon interest rate.

The home is used as collateral — this means that if you break the promise to repay your mortgage, the bank has the right to foreclose on your property. Your loan doesn’t become a mortgage until it’s attached as a lien to your home, meaning your ownership of the home becomes subject to you paying your new loan on time at the terms you agreed to with the lender.

How does a mortgage work?

Every month you make a mortgage payment, it gets split into at least four different buckets that make up principal, interest, taxes and insurance — PITI for short. Here is how each bucket works:

Principal. This is the portion of your loan balance that’s paid down with each payment.
Interest. This is the interest rate charged monthly by your lender for the mortgage you chose.
Taxes. You’ll pay one-twelfth of your yearly property tax bill each month based on how much is assessed each year in your neighborhood.
Insurance. Lenders require homeowners insurance to cover your home against hazards like fire, theft or accidents. You may have an additional, separate monthly payment for mortgage insurance based on your down payment or loan type.

In the early years of your mortgage, interest makes up a greater part of your overall payment — but as time goes on, you’ll start paying more principal than interest until the loan is paid off.

Your lender will provide an amortization schedule, which is a table showing the breakdown of each payment. This schedule will show you how your loan balance drops over time, as well as how much principal you’re paying versus interest.

Lenders use an escrow account to pay tax and insurance bills

Mortgage lenders require an escrow account to collect your property taxes and homeowners insurance each month if you make less than a 20% down payment on your mortgage. Your lender uses the funds in an escrow account to pay your property tax bills and homeowners insurance premiums.

Common mortgage terms

You’ll sign many different documents with paragraphs of legal language to obtain a mortgage. Here are some common terms you’ll need to know if you’re getting a mortgage:

Promissory note. The promissory note outlines how you’ll repay the loan, with details including:

Your interest rate
Your total loan amount
The term of the loan (30 or 15 years are common examples)
When the loan is considered late
Your monthly principal and interest payment

Mortgage. Though mortgage is usually used as a catch-all term for a home loan, it has a specific meaning. The mortgage gives the lender the right to take ownership of your home and sell it if you don’t make payments at the terms you agreed to on the note.

Deed of Trust. A deed of trust works like a mortgage and is secured against your home. Most mortgages are agreements between two parties — you and the lender. In some states, a third person, called a trustee, may be added to your mortgage through a document called a deed of trust. A deed of trust gives the trustee the authority to take control of your home on behalf of the lender if you stop making payments.

Mortgage closing costs. These are expenses charged by a lender to make or originate your loan. They typically include origination fees, discount points and fees related to underwriting, processing, document preparation and funding your loan. However, your total closing costs include appraisal and title fees, title insurance, surveys, recording fees and more.

While fees vary widely by type of mortgage and location, they typically total 2% to 6% of the loan amount. As an example, a $250,000 mortgage, your closing costs would amount to anywhere from $5,000 to $15,000.

Discount points. Also called “mortgage points,” this is money paid to your lender in exchange for a lower interest rate.

Note rate. This is the actual interest rate you pay each year based on the loan amount you borrow, expressed as a percentage rate. It doesn’t reflect any of the costs or charges for the mortgage, and shouldn’t be confused with the annual percentage rate (which we’ll explain next).

Annual percentage rate (APR). The APR is typically higher than your note rate because it reflects the cost of borrowing money — based on the interest, fees and loan term — expressed as a yearly rate. The APR was created to make it easier for consumers to compare loans with different interest rates and costs, and federal law requires it to be disclosed in all advertising. Basically, the higher the difference between your note rate and APR, the more you’re paying in closing costs.

Mortgage insurance. Mortgage insurance protects a lender against losses incurred if they have to foreclose on your home because you can’t make your payments. You’ll pay mortgage insurance on some government-backed loans regardless of the amount of your down payment, but you can avoid it on conventional loans with a down payment of 20% or more.

How to qualify for a mortgage

You’ll need to meet minimum mortgage requirements to qualify for a mortgage. Lenders typically consider the following when reviewing your mortgage application:

Your credit score

Your credit score reflects how you’ve managed different credit accounts in your financial history. The higher your credit score, the lower your interest rate and mortgage payment will be. The standard to get the best rates for a conventional loan is a 780 credit score, but this high score isn’t required to qualify for a home loan.

Most lenders require a minimum FICO Score of:

620 for a fixed-rate or adjustable-rate conventional mortgage
580 for a minimum down payment FHA loan
500 for an FHA loan with a higher down payment (at least 10%)

Don’t know your credit score? Get your free score on LendingTree Spring today.

Your debt-to-income ratio

Your debt-to-income (DTI) ratio is the total of your monthly debt payments divided by your gross monthly income. DTI helps lenders assess your ability to manage your monthly payments and repay the money you’ve borrowed. The Consumer Financial Protection Bureau (CFPB) recommends a DTI ratio of no more than 43%. However, some loan programs (which we’ll cover later) allow DTIs above 50% in certain cases.

Your down payment

A down payment is how much money you pay upfront to buy a home. Not all loan programs require a down payment, but the more you put down, the lower your mortgage payment will usually be. Lenders typically ask for two months of bank statements to show where your funds are coming from. You’ll need to document down payment funds from a gift, 401(k) loan or down payment assistance program.

Your rainy-day reserves

Essentially, mortgage reserves are assets you can easily convert to cash to make your mortgage payments if you were to hit a rough financial patch. This money can make the difference between mortgage approval and denial, especially if you have a low credit score or a high DTI ratio.

Examples of accounts you can use to meet a mortgage reserve requirement include:

Money in checking and savings accounts
Investments in stocks, bonds, mutual funds, CDs, money market funds and trust accounts
Vested retirement account assets
The cash value of life insurance policies

Your property type

Though you might not realize it, your property has to qualify for the mortgage you’re applying for. The lender is providing you with money that is secured by your home, and they want to make sure the property is acceptable in case you default and they have to resell it.

Different property types come with different requirements and, in some cases, extra costs.

Single-family home. This is the most common home type and is a one-unit home built on a lot you own. Lenders typically offer the most competitive rates on a single-family residence.
Condominium. More common in cities and urban areas, a condominium gives you ownership of what’s inside the walls of your unit, but you share the outer walls and areas with other residents. You pay monthly dues to an HOA for repairs and maintenance of the “common areas,” and the lender reviews the association’s money management history. Rates are slightly higher, due to the risk that the actions of a neighbor or the association could damage your unit or make it hard to sell.
Multifamily home. One way to buy a home and earn income at the same time is to purchase a two- to four-unit property, live in one of the units and rent the others out to tenants for extra income. However, the added risk that a tenant could bail on or damage the property generally means you’ll pay a higher interest rate and make a larger down payment for a multifamily home.
Manufactured home. These are structures built in a factory and then permanently attached to land that you own. Although building standards have improved significantly, lenders charge slightly higher mortgage rates to borrowers looking to refinance or buy a manufactured home, due to the risk that they may not fare well in extreme weather conditions.

Your occupancy plans

Occupancy is a lender term referring to how you’ll “occupy” the home. There are three standard types of occupancy: Owner, second home and nonowner.

Owner occupancy. This is a home you’ll live in as your primary residence. Mortgage lenders offer the best rates for a home you live in full time.
Second homes. A second home may be a vacation home on the beach, a cabin in the mountains or a house you own in another state close to family. Guidelines are stricter for second homes, and they usually come with higher down payment requirements and more expensive interest rates.
Nonowner occupancy. This is the occupancy you’ll choose if you plan to rent the home out to someone and earn income. Investment property mortgage rates are higher for rental homes, and you’ll need a higher credit score, higher down payment and more cash reserves to qualify for a loan.

Types of mortgage loans and how they work

The table below highlights the basics of the different mortgage types available.

Mortgage type	How it works
Fixed-rate mortgage	Offers a stable monthly payment that doesn’t change for the life of the loan
Adjustable-rate mortgage (ARM)	Lower teaser rate for a set time period The rate changes after the low initial rate period ends and could rise or fall based on the type of ARM you choose
Long-term loans	30-year mortgage loans are typically the longest term offered with the lowest possible monthly payment You’ll pay more interest over the life of the loan than with a shorter-term loan Your interest rate is usually higher than with shorter-term loans Some lenders may offer 40-year fixed rate mortgages
Short-term loans	The 10-year fixed-rate mortgage is usually the shortest available term, but 15-year mortgages are another short-term loan option You’ll make a much higher monthly payment than a longer-term loan You’ll pay far less mortgage interest than with a shorter-term loan
FHA loans	Allow scores as low as 580 with a 3.5% down payment Allow scores as low as 500 with a 10% down payment Requires two types of FHA mortgage insurance, regardless of down payment amount Insured by the Federal Housing Administration (FHA)
Conventional loans	Offer programs with a 3% down payment and a 620 credit score Don’t require mortgage insurance with a 20% down payment Guidelines set by government-sponsored enterprises Fannie Mae and Freddie Mac
VA loans	Exclusively for eligible active-duty and retired military borrowers and surviving spouses No down payment required in most cases No mortgage insurance is required May be required to pay a VA funding fee unless exempt Loans are guaranteed by the U.S. Department of Veterans Affairs (VA)
USDA loans	No down payment required The program is for low- to moderate-income borrowers The loan can only finance homes in USDA-designated rural areas Backed by the U.S. Department of Agriculture (USDA)
Reverse mortgages	This loan program is available for homeowners aged 62 or older The program is designed to help seniors age in place and supplement their retirement income with their home equity You won’t make monthly mortgage payments — the loan is repaid when you move out or when you die You can typically choose between a few different payout options: a lump sum, monthly payments or line of credit

Mortgage pros and cons

Advantages of a mortgage

You’ll achieve homeownership. A mortgage allows you to purchase a home without paying the full purchase price in cash. Without a mortgage, few people would be able to afford to buy a home.
You can cash in your equity. Equity in your home — the difference between the market value of your home and the amount you owe on the mortgage — can give you access to money when you need it. Many homeowners take out home equity loans or home equity lines of credit (HELOCs) to pay for home improvements, medical bills or college tuition.
Your credit score may improve. Having a mortgage loan in good standing on your credit report improves your credit score. That credit score determines the interest rate you are offered on other credit products, such as car loans and credit cards.
You may have extra tax benefits. The tax code currently provides tax benefits of homeownership. You may be eligible for a deduction for the interest paid on your mortgage or a homestead exemption, which helps you save on your property tax bill. When you sell your primary residence, you may be able to exclude all or part of your gain on the sale of your home from taxable income.

Disadvantages of a mortgage

You risk losing your home. Because your house is collateral for the mortgage, the lender has the right to take your home if you stop making payments. If the lender takes your home in a foreclosure, you’ll also lose any money already paid up to that point.
Your home’s value could drop. Any property you purchase can lose value over time. If the real estate market drops and your home loses value, you could end up with a mortgage balance greater than the value of your house. This is called being “underwater,” and it can put you in a situation where you have to pay down the loan balance to sell your home since the loan balance is higher than your home is worth.

3 things to do before shopping for a mortgage

Buying a home may be the largest purchase of your life, so it’s a good idea to know the following factors before you start shopping.

1. Know your credit score and take steps to boost it

Your credit score is one of the most significant factors in getting approved for a mortgage, and it also influences the interest rate you’ll end up with. You can check your credit score and improve it by:

Requesting a free credit report from annualcreditreport.com
Disputing any errors that may be dragging your score down
Keeping your credit card balances low — or, better yet, paying them off
Paying all your monthly bills on time

2. Find out how much you can afford

Check out our affordability calculator to get an idea of where you stand before you start looking for houses. Remember that your monthly payment will be more than just principal and interest. It’ll also include homeowners insurance, property taxes and, potentially, mortgage insurance (depending on your loan program and down payment). You should also be sure to budget for:

Utilities (including water, electric and cable)
Maintenance costs
Homeowners association dues
Furniture and appliances
Extra mortgage reserves in case of a financial emergency

3. Shop around for your best deal

Whether you choose a government-backed loan or conventional one, fees and interest rates can vary widely by lender (even for the same type of loan), so shop around for your best deal. Collecting loan estimates from at least three different mortgage lenders can save you thousands over the life of your mortgage. You can start your search by comparing rates with LendingTree.

What happens if you can’t pay your mortgage?

If you fall on hard financial times, there are steps you can take to avoid foreclosure while you’re working things out. Be prepared to provide documentation and letters detailing your situation.

Request a forbearance. Contact your loan servicer and request a mortgage forbearance. This option allows you to stop making payments for a set time period that will vary based on your loan servicers policies. Make sure you understand the repayment options after the forbearance period ends. These options typically include repaying the entire past due balance, making extra payments for a set time or deferring the missed payment balance payoff until you sell or refinance your home.
Request a loan modification. If you’re not eligible for a forbearance, discuss mortgage modification options with your loan servicer. You may be able to negotiate a reduced interest rate, a longer term or a combination of both. Make sure you keep track of all written correspondence from your lender and respond quickly to requests for additional documentation.

What happens if your mortgage is foreclosed?

There are two ways a lender can collect if you fall behind on payments — through the courts in a process called judicial foreclosure, or with a trustee in a process called nonjudicial foreclosure. If you can’t make your payments, it’s essential you know the timeline and processes for how long a foreclosure will take.

Judicial foreclosure. A judicial foreclosure is a court process and generally takes much longer than a nonjudicial foreclosure. It gives you more time to either find a way to bring the mortgage current or make plans for other housing arrangements.
Nonjudicial foreclosure. If you signed a note and a deed of trust at your closing, then you are probably in a state that allows a nonjudicial foreclosure process. The courts won’t be involved in this process, and the foreclosure process timeline may be much faster, leaving you with less time if you’re unable to bring the payments current.

Common mortgage myths

You need perfect credit to get a mortgage. With government-backed programs like FHA loans, you may be approved for a loan with a credit score as low as 500, if you can make a 10% down payment. However, lenders will need to determine your creditworthiness based on other factors such as your DTI ratio and cash reserves for you to get a mortgage with bad credit.
You need a 20% down payment to get a mortgage. There are many low-down-payment mortgage programs to choose from that require less than a 20% down payment. In addition, you may be eligible for down payment assistance programs offered in your area.
If you’re prequalified, you’ll get a mortgage. Getting prequalified for a mortgage only gives you an idea of how much a lender might loan you based on your credit score, debt and income. However, the lender still has to review supporting documents that could reveal roadblocks to your final approval. You may want to consider getting a preapproval before you look at houses if you know you have issues with your income or credit.

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On this page

What is a mortgage?
How does a mortgage work?
How to qualify for a mortgage
Types of mortgage loans and how they work
Mortgage pros and cons
3 things to do before shopping for a mortgage
What happens if you can’t pay your mortgage?
Common mortgage myths