Mortgages
A mortgage is how ordinary people buy something worth many years of salary: by promising to pay for it slowly, with interest.
By Greg Goodwin · Published October 17, 2026 · Updated October 24, 2026
Cheat Sheet
- Rate snapshot (2026): Freddie Mac's survey averaged 7.40% for a 30-year fixed and 6.71% for a 15-year fixed in the week of October 15, 2026.
- Year-over-year: those same averages were 6.27% and 5.52% a year earlier, so rates can move a lot.
- Benchmark borrower: Freddie Mac's survey covers conventional, conforming purchase loans with 20% down and good to excellent credit; your rate may differ.
- Illustrative math: $300,000 at 7.40% over 30 years is about $2,077 a month in principal and interest, roughly $448,000 of total interest.
- Month one on that loan: about $1,850 goes to interest and about $227 to principal.
- PMI: may be required on a conventional loan with less than 20% down, and it protects the lender, not you.
The 60-Second Version
A mortgage is a loan used to buy real estate, with the property itself serving as collateral. You typically make a down payment, and the lender finances the rest. Each monthly payment covers interest plus a slice of the principal, and in the early years most of it goes to interest. Loans commonly run 15 or 30 years. With a fixed-rate mortgage the interest rate is set at the start and never changes, while an adjustable-rate mortgage starts with a rate that can later go up or down. Your actual monthly bill often also includes property taxes and homeowners insurance, usually collected through escrow, and sometimes private mortgage insurance. Rates and rules change over time, and the figures here are from 2026 in the United States. This is general education, not personalized financial advice.
The Long Version
What You're Signing Up For
A mortgage is secured by the home, which means that if you stop paying, the lender can take the property through foreclosure. The CFPB, the federal consumer finance agency, offers a step-by-step "Buying a house" guide that breaks the process into four stages: preparing to shop, exploring loan choices, choosing a loan offer, and getting ready to close. It also points buyers to HUD-certified housing counselors. Because a mortgage is likely the largest debt most people ever carry, small differences in rate or fees can add up to tens of thousands of dollars over the life of the loan.
Fixed or Adjustable
With a fixed-rate mortgage, the interest rate is set when you take out the loan and does not change. With an adjustable-rate mortgage, or ARM, the rate may go up or down. Many ARMs start at a lower rate than fixed loans, and that introductory rate may last months, a year, or a few years. After that, the rate changes at regular intervals based on an index plus a margin set by the lender, subject to any caps, and your payment is likely to rise if the index rises. The CFPB warns against assuming you can sell or refinance before the rate adjusts, because your home value or finances could change. Freddie Mac notes that the recent mortgage market has been dominated by fixed products.
Where Your Payment Goes
Take a $300,000 loan at 7.40% for 30 years, which matches the national average Freddie Mac reported for mid-October 2026. The standard amortization formula gives a principal-and-interest payment of about $2,077 a month. In month one, roughly $1,850 of that is interest and only about $227 reduces the balance. Over 30 years the interest alone would total roughly $448,000. At the 6.27% average from a year earlier, the same loan's payment would be near $1,851, which shows why a one-point swing matters so much. These are illustrations, not quotes. On top of principal and interest, many lenders require an escrow account for property taxes and insurance, and because those bills change from year to year, your total monthly payment can change too, even on a fixed-rate loan.
Down Payments and PMI
If you take out a conventional loan with a down payment of less than 20% of the purchase price, you may have to buy private mortgage insurance. The CFPB stresses that PMI protects the lender, not you: if you fall behind, you can still lose your home to foreclosure. PMI is most often paid as a monthly premium added to your payment, though sometimes it is an up-front premium at closing or both. Some lenders offer low-down-payment loans without PMI in exchange for a higher interest rate, so the better deal depends on factors like how long you plan to stay. Putting 20% down avoids PMI on a conventional loan and may earn a lower rate. Other loan types, such as FHA loans, are alternatives to compare.
Shopping and Closing
The CFPB recommends getting official offers from several lenders and comparing them. Its guide walks through the Loan Estimate and the Closing Disclosure, the standardized forms that itemize a loan's costs, including any PMI premium, and make offers easier to compare. Freddie Mac's weekly survey is a handy benchmark, but it is based on borrowers with 20% down and strong credit, so your quote may be higher or lower. Finally, the CFPB warns that scammers target homebuyers in the days before closing, so read its mortgage closing scam guidance before you wire any money. A HUD-certified housing counselor or licensed professional can help with decisions specific to your situation.
Why People Care
For most households, a mortgage is the biggest loan and the biggest monthly bill they will ever have, so understanding rates, down payments, and fees can save serious money. Knowing the basics also makes lender conversations less intimidating and scams easier to spot.
Glossary
- Principal
- The amount you borrowed and still owe, not counting interest.
- Amortization
- Paying a loan off in scheduled installments so each payment covers interest plus some principal.
- Escrow
- An account your servicer funds from part of each payment to pay property taxes and insurance.
- Private mortgage insurance (PMI)
- Lender-protecting insurance often required on conventional loans with a down payment under 20%.
- Adjustable-rate mortgage (ARM)
- A loan whose rate can rise or fall after an introductory period, based on an index plus a margin.
Go Deeper
More to Explore
- Emergency Funds
A Federal Reserve survey once found that roughly a third of American adults would struggle to cover a surprise $400 expense using cash on hand.
- Debt Payoff Strategies
The debt strategy that saves the most interest isn't always the one people actually finish, and research backs that up.
- Income Taxes
Landing in a higher tax bracket doesn't tax all your income at the higher rate, only the slice that falls inside that bracket.
- Retirement Accounts
Compound growth is why starting retirement savings early beats saving more later: time does the heavy lifting.
- Insurance Basics
Insurance is risk pooling: many people pay premiums so the few hit by rare, severe losses can afford to recover.