A mortgage is a loan used to buy real estate, where the property itself serves as collateral guaranteeing the loan. If you stop making payments, the lender has a legal claim (called a lien) that allows them to take possession of the home and sell it to recover what you owe. Most home purchases involve a mortgage because few buyers can pay hundreds of thousands of dollars in cash.
How a Monthly Mortgage Payment Works
Your monthly mortgage payment has four components, often abbreviated as PITI: principal, interest, taxes, and insurance. Principal is the portion that reduces what you actually owe on the loan. Interest is the cost the lender charges you for borrowing the money. Property taxes and homeowner’s insurance are often bundled into the same monthly payment and held in an escrow account, which is simply a holding account your lender uses to pay those bills on your behalf when they come due.
Early in the loan, most of your payment goes toward interest rather than principal. That’s because interest is calculated on the remaining balance, and when the balance is large, the interest charge is large. As you pay down the loan over the years, the interest portion shrinks and more of each payment chips away at the principal. This structure is called amortization. On a 30-year mortgage, you might spend the first several years barely denting the principal, then see the balance drop much faster in the final decade.
Fixed-Rate vs. Adjustable-Rate Mortgages
A fixed-rate mortgage locks in your interest rate for the entire life of the loan. Your principal-and-interest payment stays the same from month one to the final payment, which makes budgeting predictable. The most common terms are 15 years and 30 years. A 15-year loan has higher monthly payments but saves you a significant amount of interest over the life of the loan. A 30-year loan spreads payments out, keeping them lower each month but costing more in total interest.
An adjustable-rate mortgage (ARM) starts with a lower fixed rate for an introductory period, typically 5, 7, or 10 years, then adjusts periodically based on a market index. After the introductory period ends, your rate (and your payment) can go up or down. ARMs can make sense if you plan to sell or refinance before the rate adjusts, but they carry the risk of higher payments down the road.
Major Mortgage Types
Conventional Loans
Conventional mortgages are not backed by a government agency. They typically require a credit score of at least 620 and a down payment as low as 3% to 5%, though putting down less than 20% means you’ll pay private mortgage insurance (PMI), a monthly fee that protects the lender if you default. Once you build enough equity in the home, usually reaching 20%, you can request to have PMI removed.
FHA Loans
FHA loans are insured by the Federal Housing Administration and designed for borrowers with lower credit scores or smaller down payments. You can qualify with a credit score as low as 580 and a 3.5% down payment. If your score falls between 500 and 579, you’ll need 10% down. The trade-off is that FHA loans require both an upfront mortgage insurance premium and ongoing monthly mortgage insurance for the life of the loan in most cases. For 2026, FHA loan limits for single-family homes range from $541,287 in lower-cost areas to $1,249,125 in high-cost areas. Your debt-to-income ratio, which is your total monthly debt payments divided by your gross monthly income, can go up to 43%, or even 50% in some cases.
VA Loans
VA loans are available to active-duty service members, veterans, and eligible surviving spouses. They stand out because they require no down payment and no monthly mortgage insurance. You’ll need a certificate of eligibility to prove your service history. The VA itself doesn’t set a minimum credit score, but most lenders look for 620 or higher. Instead of monthly insurance, VA loans charge a one-time funding fee that can be rolled into the loan. For borrowers with full entitlement, there’s no cap on the loan amount above $144,000.
Costs Beyond the Down Payment
Buying a home comes with closing costs, the fees you pay when the loan is finalized. These typically run 2% to 5% of the loan amount. On a $450,000 mortgage, that means roughly $9,000 to $22,500 in upfront fees.
The largest chunks include origination fees (what the lender charges to process your loan, usually 0.5% to 1% of the loan balance), settlement and title fees (covering the legal transfer of ownership and title insurance), and the home appraisal fee, which averaged around $558 nationally for loans in the $400,000 to $500,000 range. Title insurance alone can run over $2,000 when you combine the lender’s policy with an optional owner’s policy. Some of these costs are negotiable, and sellers sometimes agree to cover a portion of closing costs as part of the deal.
How You Qualify
Lenders evaluate four main factors when deciding whether to approve your mortgage and at what interest rate. Your credit score is the biggest driver of the rate you’ll be offered. Higher scores unlock lower rates, which translates directly into lower monthly payments and less interest paid over the life of the loan.
Your debt-to-income ratio tells the lender how much of your income is already committed to other debts like car payments, student loans, and credit cards. Most lenders want this ratio below 43%, though some loan programs allow higher. Your employment history and income stability show the lender you can sustain payments over time. And the down payment amount affects both your loan terms and whether you’ll need mortgage insurance.
Before you start shopping for homes, you can get pre-approved by a lender. Pre-approval involves submitting financial documents (pay stubs, tax returns, bank statements) and getting a conditional commitment for a specific loan amount. It signals to sellers that you’re a serious buyer and gives you a clear picture of what you can afford.
What Happens After You Close
Once you close on the loan and get the keys, you’ll start making monthly payments, typically beginning the first of the month after a short grace period. Your loan may be sold to a different company that handles collecting payments, called a loan servicer. This is common and doesn’t change your loan terms. You’ll just send payments to a different address or portal.
If your financial situation improves over time, you have options. Refinancing replaces your existing mortgage with a new one, potentially at a lower interest rate or shorter term. Making extra payments toward principal can shorten your loan and reduce total interest. Even small additional amounts each month add up significantly over a 15- or 30-year timeline because every dollar of extra principal you pay eliminates future interest that would have been charged on that dollar.