A mortgage is a loan used to buy a home, where the home itself serves as collateral. If you stop making payments, the lender can take the property through foreclosure. Most homebuyers need a mortgage because few people can pay hundreds of thousands of dollars upfront, so the loan spreads that cost over 15 to 30 years of monthly payments.
How a Mortgage Works
When you take out a mortgage, you borrow a specific amount (the loan principal) and agree to pay it back with interest over a set number of years, called the loan term. The lender charges interest as the cost of lending you that money. Your monthly payment is calculated using an amortization formula that ensures you pay off both the interest and principal by the end of the term.
Early in the loan, most of your monthly payment goes toward interest rather than reducing what you owe. Over time, the balance shifts: a larger share of each payment chips away at the principal, and less goes to interest. On a $350,000 loan at 6.23%, your first monthly payment would send roughly $1,816 toward interest and only about $330 toward the principal. By year 20, those proportions would be nearly reversed.
The property secures the loan for the entire life of the mortgage. In some states, the lender holds a lien on your home. In others, a neutral third party called a trustee holds the title until you pay the loan in full. Either way, the practical effect is the same: you live in the home and build equity as you pay down the balance, but the lender has a legal claim on the property until the debt is satisfied.
What Your Monthly Payment Covers
Your mortgage payment is more than just the loan itself. Lenders bundle four costs into one monthly bill, often referred to as PITI: principal, interest, taxes, and insurance.
- Principal: The portion that reduces the amount you still owe on the loan.
- Interest: The fee the lender charges for borrowing the money, expressed as an annual percentage rate.
- Taxes: Property taxes are set by your local government based on your home’s assessed value. Your lender estimates the annual bill and adds a prorated share to each monthly payment, holding that money in an escrow account so the taxes get paid on time.
- Insurance: Homeowners insurance protects against property damage, lost belongings, and liability for injuries on your property. Most lenders require it. Like taxes, the premium is prorated into your monthly payment and held in escrow.
Because taxes and insurance are estimated, your total payment can change from year to year even on a fixed-rate loan. If your property tax assessment rises or your insurance premium increases, your lender will adjust the escrow portion of your payment accordingly.
Interest Rates and What Drives Them
The interest rate on your mortgage determines how much you pay to borrow over the life of the loan, and even small differences add up to tens of thousands of dollars. As of late April 2026, the average 30-year fixed-rate mortgage sits at 6.23%, down from 6.81% a year earlier.
Two broad categories of rates exist. A fixed-rate mortgage locks your interest rate for the entire loan term, so your principal and interest payment never changes. An adjustable-rate mortgage (ARM) starts with a lower rate for an introductory period, typically 5 or 7 years, then adjusts periodically based on market conditions. ARMs carry more risk because your payment can rise significantly once the introductory period ends.
The rate a lender offers you depends on factors you can control and some you cannot. Your credit score, down payment size, debt relative to income, and the loan term all influence your rate. Broader economic conditions, including Federal Reserve policy and bond market activity, drive where average rates land on any given week. Shopping multiple lenders is one of the most effective ways to secure a lower rate, since offers can vary by a quarter of a percentage point or more for the same borrower.
Common Loan Types
Most mortgages fall into three categories, each designed for different financial situations.
Conventional Loans
Conventional loans are not backed by a government agency. They typically offer lower overall costs than government-backed options but have stricter qualification standards. You generally need a credit score in the mid-600s or higher, a stable income, and a manageable level of existing debt. A down payment of 20% avoids the need for private mortgage insurance (more on that below), though many conventional loans allow as little as 3% down.
FHA Loans
Insured by the Federal Housing Administration, FHA loans are designed for borrowers with lower credit scores or smaller savings. Down payments can be as low as 3.5%, and credit requirements are more forgiving. The trade-off is that FHA loans require mortgage insurance for the life of the loan in most cases, which adds to your monthly cost.
VA Loans
Available to veterans, active-duty service members, and eligible surviving spouses, VA loans are guaranteed by the Department of Veterans Affairs. They stand out because they require no down payment and no ongoing mortgage insurance. A one-time funding fee applies, though it can be rolled into the loan balance.
To qualify for any of these loan types, your lender will verify your income, employment, assets, debts, and credit history to confirm you can handle the payments.
Private Mortgage Insurance
If you put less than 20% down on a conventional loan, your lender will require private mortgage insurance, commonly called PMI. This protects the lender, not you, in case you default. PMI typically costs between 0.5% and 1.5% of your loan amount per year, added to your monthly payment. On a $300,000 loan, that could mean an extra $125 to $375 per month.
The good news is PMI does not last forever. You have the right to request cancellation in writing once your loan balance drops to 80% of the home’s original value. To qualify, you need to be current on payments, have no second liens on the property, and show that the home’s value has not declined below what it was worth when you bought it. If you do not make the request yourself, your lender is legally required to automatically terminate PMI once the balance reaches 78% of the original value, as long as your payments are current. As a final backstop, PMI must be removed when you reach the midpoint of your loan term, which is 15 years on a 30-year mortgage, regardless of your remaining balance.
How Equity Builds Over Time
Equity is the difference between what your home is worth and what you still owe on the mortgage. You build equity two ways: by paying down the principal and through any increase in the home’s market value. If you bought a home for $400,000 with a $360,000 mortgage and the balance has dropped to $320,000 while the home’s value has risen to $430,000, your equity is $110,000.
Equity matters because it represents real wealth you can tap later through a home equity loan, a home equity line of credit, or by selling the property. It is also what determines when you can drop PMI and how much profit you walk away with if you sell.
The Steps From Application to Closing
Getting a mortgage involves several stages that typically span 30 to 45 days from application to closing. You start by getting preapproved, which involves submitting financial documents like pay stubs, tax returns, bank statements, and authorization for a credit check. Preapproval gives you a realistic budget and signals to sellers that you are a serious buyer.
Once you find a home and have an accepted offer, the lender orders an appraisal to confirm the property is worth the purchase price. An underwriter reviews your full financial profile and the property details to make a final lending decision. During this period, avoid opening new credit accounts or making large purchases, since either could change your debt picture and jeopardize the approval.
At closing, you sign the loan documents, pay closing costs (which typically run 2% to 5% of the loan amount), and receive the keys. Your first mortgage payment is usually due about 30 to 60 days later, and the cycle of monthly payments begins.