What is a mortgage? How mortgage loans work, in plain English
The short answer
A mortgage is a loan used to buy or refinance a home, with the property itself as collateral. You borrow a lump sum from a lender and repay it, plus interest, in monthly installments over a set term, most often 15 or 30 years. If you stop paying, the lender can take the home through foreclosure. A typical monthly payment covers principal, interest, property taxes, and homeowners insurance, known as PITI.
Key numbers
- Common terms
- 15, 20, and 30 years
- Payment parts
- Principal, interest, taxes, insurance (PITI)
- Collateral
- The home itself
- Example
- $400,000 at 7.03% for 30 years is about $2,669 a month in principal and interest
What is a mortgage in simple terms?
A mortgage is a loan for buying real estate. Because homes cost far more than most people have saved, a lender pays the seller most of the price on your behalf, and you repay the lender over many years. To protect itself, the lender takes a legal claim on the property, called a lien. You own the home and live in it, but if you break the loan agreement, the lender can force a sale to recover what it is owed.
In everyday speech, "mortgage" and "home loan" mean the same thing. Strictly speaking, the mortgage is the document that pledges the property as security, and the promissory note is the document that contains your promise to repay. In some states the security document is called a deed of trust and involves a neutral third party called a trustee.
Who is involved in a mortgage?
- Borrower: you, and anyone who signs the loan with you.
- Lender (originator): the bank, credit union, or mortgage company that makes the loan.
- Servicer: the company that collects your payments and manages your escrow account. It may or may not be the lender, and your loan can be sold or transferred without changing its terms.
- Investors and guarantors: most loans are sold to investors, often packaged by Fannie Mae, Freddie Mac, or Ginnie Mae. How that affects your rate.
- Title company and appraiser: third parties who verify ownership and the home's value.
What makes up a monthly mortgage payment?
Most payments have four parts, called PITI:
- Principal: the part that reduces what you owe.
- Interest: the lender's charge for lending you the money, calculated on your remaining balance.
- Taxes: property taxes, usually collected monthly and paid by your servicer.
- Insurance: homeowners insurance, plus mortgage insurance if you put less than 20% down.
Taxes and insurance are typically held in an escrow account. How escrow works.
You buy a $429,100 home (the national median in August 2026) with 10% down, borrowing $386,190 at 7.03% for 30 years. Principal and interest is about $2,577. Add about $393 a month for property taxes, $167 for insurance, and $193 for private mortgage insurance, and the total payment is about $3,330. Try your own numbers in the payment calculator.
How is interest calculated?
Interest on a standard mortgage is charged monthly on the balance you still owe. Each month, the lender divides your annual rate by 12 and multiplies it by your balance. With a $400,000 balance at 7.03%, the first month's interest is about $2,343. Your fixed payment covers that interest first, and the remainder goes to principal, so early payments are mostly interest. As the balance falls, less interest is charged and more of each payment goes to principal. This schedule is called amortization. See the full amortization breakdown.
What types of mortgages are there?
| Type | How it works |
|---|---|
| Fixed-rate | Same rate and payment for the life of the loan (15, 20, or 30 years). |
| Adjustable-rate (ARM) | Fixed rate for an initial period, then adjusts. Compare fixed and ARM. |
| Conventional | Not backed by a government agency; usually follows Fannie Mae and Freddie Mac rules. |
| FHA | Insured by the Federal Housing Administration; allows 3.5% down and lower credit scores. FHA loan details. |
| VA | Guaranteed by the Department of Veterans Affairs for eligible service members and veterans; often no down payment. |
| USDA | Backed by the U.S. Department of Agriculture for eligible rural areas; 0% down with income limits. |
| Jumbo | Larger than the conforming loan limit ($832,750 for most areas in 2026). Loan limits explained. |
| Interest-only, balloon, and other specialty loans | Less common; may have larger payments later or special requirements. |
What do lenders require to approve a mortgage?
- Credit: a credit score and history that meet the loan program's minimum. Credit score requirements.
- Income and employment: stable, documented income.
- Debt-to-income ratio: total monthly debts, including the new mortgage, compared with income. DTI explained.
- Down payment and reserves: from 0% to 20% or more, depending on the loan. Down payment options.
- Property: an appraisal showing the home is worth the loan amount, and clear title. How appraisals work.
What does a mortgage cost beyond the interest?
You will pay closing costs of about 2% to 5% of the loan amount, mortgage insurance if you put down less than 20%, and ongoing costs such as property taxes, homeowners insurance, HOA dues, and maintenance. Discount points are an optional upfront cost to lower your rate.
Do you own the home if you have a mortgage?
Yes. Title to the property is in your name. The lender holds a lien, which is released when you repay the loan. You can generally sell the home, and the sale proceeds first pay off the mortgage. If you sell or refinance, your loan is usually repaid in full because of a "due on sale" clause.
What happens if you can't pay?
Missing payments triggers late fees and eventually a default. Federal rules generally prevent a servicer from starting a foreclosure until you are more than 120 days delinquent, giving you time to seek help. Options can include a repayment plan, forbearance, a loan modification, or a sale. Contact your servicer as soon as you have trouble paying, and consider a HUD-approved housing counselor, whose help is often free. Ignoring the problem is the most costly response.
How does a mortgage end?
- You pay it off with the final scheduled payment or an early payoff. The lender records a release of the lien.
- You sell the home. The buyer's funds repay your loan at closing.
- You refinance. A new loan replaces the old one. Refinancing guide.
- Someone assumes it. Some FHA, VA, and USDA loans can be taken over by a qualified buyer, keeping the original rate.
Pros and cons of using a mortgage
| Benefits | Risks and costs |
|---|---|
| Lets you buy now instead of saving the full price. | Years of interest can equal a large share of the price. |
| Fixed-rate loans give a predictable payment. | Your home is collateral. |
| Payments build equity over time. | Closing costs and ongoing homeownership costs add up. |
| Interest may be tax deductible if you itemize. | Variable-rate loans can rise. |
For a complete look at the buying process, see the home buying guide.
Mortgage vocabulary quick reference
| Term | Plain-English meaning |
|---|---|
| Principal | The amount you borrowed and still owe |
| Interest rate | The yearly cost of borrowing, as a percentage of the balance |
| APR | The rate plus certain fees, expressed as a yearly cost |
| Term | How long you have to repay, such as 30 years |
| Amortization | Paying off a loan gradually with scheduled payments |
| Escrow | An account that holds money for taxes and insurance |
| LTV | Loan-to-value: the loan divided by the home's value |
| DTI | Debt-to-income: monthly debts divided by gross monthly income |
| PMI | Insurance for the lender if you put down less than 20% |
| Points | Upfront fees, each 1% of the loan, to lower the rate |
| Rate lock | A promise to hold your rate for a set time |
| Pre-approval | A lender's conditional commitment to lend |
| Underwriting | The lender's review of you and the property |
| Closing | The final meeting where you sign and take ownership |
| Servicer | The company that collects your payments |
The full list is in our mortgage glossary.
Common mortgage myths
- "You need 20% down." Many loans allow far less. Down payment options.
- "The bank owns your house until the loan is paid." You own it. The lender holds a lien.
- "Paying extra does nothing in the early years." Extra principal early in the loan has the biggest effect on interest. See the numbers.
- "The lowest rate is always the best deal." Fees and points change the total cost.
- "Pre-approval is the same as final approval." It is not. The appraisal, title, and underwriting come later.
Frequently asked questions
What is a mortgage in simple terms?
A loan to buy a home, repaid in monthly payments with interest, and secured by the home itself.
What does PITI stand for?
Principal, interest, taxes, and insurance, the four main parts of a monthly mortgage payment.
How long is a typical mortgage?
Thirty years is the most common term, followed by 15 years. Twenty-year and other terms are also available.
What is the difference between a mortgage and a home loan?
In everyday use they mean the same thing. Technically the mortgage is the document that secures the loan with the property.
Can I pay off my mortgage early?
Yes, in most cases. Extra payments reduce your principal and interest costs. Check your loan for any prepayment penalty, which is uncommon.
Who owns the house, me or the bank?
You own the home. The lender holds a lien that is released when the loan is paid off.