A mortgage is a loan used to buy or refinance real estate, where the property itself serves as collateral. You repay the borrowed amount plus interest over a set term, and the lender can foreclose if you stop paying. It is the primary way most people finance a home in the US.
How does a mortgage work?
A mortgage lets you buy a home without paying the full price upfront. You make a down payment, borrow the rest from a lender, and repay that balance over a fixed period, commonly 15 or 30 years. Each monthly payment is split between principal and interest, and over time the loan balance shrinks through a process called amortization.
The home acts as security for the loan. That means the lender places a lien on the property and can begin foreclosure if you default. Because the debt is secured, mortgage interest rates are usually far lower than rates on unsecured borrowing like credit cards.
What a monthly payment includes
Most homeowners make a single monthly payment that bundles several costs, often summarized by the shorthand PITI:
- Principal: the portion that reduces your loan balance.
- Interest: the lender's charge for lending, set by your mortgage rate.
- Taxes: property taxes collected and held in an escrow account.
- Insurance: homeowners insurance, plus private mortgage insurance if your down payment is small.
Before you get to closing, the lender runs underwriting to confirm you can repay, checking your income, credit score, and debt-to-income ratio. An appraisal confirms the home is worth the price.
Mortgage vs. paying cash
Paying cash for a home avoids interest entirely and removes the risk of foreclosure, but it ties up a large amount of capital in a single illiquid asset. A mortgage lets you preserve cash for emergencies, investments, or other goals while still owning the home and benefiting from any appreciation.
The tradeoff is cost and complexity. A mortgage adds interest, closing costs, and years of payment obligations. For most buyers, though, financing is the only practical path to ownership, and the leverage a mortgage provides can amplify returns if the property gains value. Cash buyers sometimes still take a mortgage later through a cash-out refinance to free up funds.
For diaspora buyers earning abroad or holding assets in more than one country, a mortgage can also be a way to build US credit history and keep foreign savings invested, rather than converting everything at once through foreign exchange.
Who mortgages are for
Mortgages suit buyers who want to own property but do not have, or do not want to spend, the full purchase price in cash. That includes first-time buyers, move-up buyers, and investors financing rental property. The right loan depends on your finances, how long you plan to stay, and your tolerance for rate changes.
Pros | Cons |
|---|---|
Lets you buy a home without paying the full price upfront | You pay substantial interest over the life of the loan |
Interest rates are lower than most unsecured debt because the loan is secured | Missing payments can lead to foreclosure and loss of the home |
Fixed-rate options make long-term budgeting predictable | Closing costs and fees add thousands to the upfront cost |
Regular payments build home equity and can strengthen your credit | Qualifying requires strong credit, documented income, and a manageable debt load |
Choosing a mortgage
Start with the loan type. A conventional loan works for many buyers with solid credit, while government-backed options like an FHA loan or VA loan help buyers with smaller down payments or specific eligibility. High-priced homes may require a jumbo loan.
Then choose a rate structure. A fixed-rate mortgage keeps your rate constant, while an adjustable-rate mortgage starts lower but can move over time. Getting pre-approval early tells you your budget and strengthens your offer. Rules, fees, and available programs vary by lender and by state, so compare several offers before committing.
Frequently asked questions
It varies by loan type. Conventional loans can allow as little as 3 percent down, FHA loans typically require 3.5 percent, and some VA loans allow zero down. Putting down less than 20 percent usually means paying mortgage insurance until you build enough equity.
Requirements vary by lender and program. Conventional loans often look for a score in the mid-600s or higher, while some government-backed loans accept lower scores. A higher score generally earns you a better rate, so it pays to check your credit report before applying.
Yes. Non-citizens can often qualify through a foreign national mortgage or an ITIN mortgage, depending on residency status and the lender. Documentation and down payment requirements are usually stricter, and not every lender offers these products.
From application to closing commonly takes several weeks, though timelines vary with the lender, loan type, and how quickly you provide documents. Getting pre-approved first and responding promptly to underwriting requests can speed things up.
Prequalification is an informal estimate based on figures you provide. Pre-approval is a stronger step where the lender verifies your income, credit, and assets, giving you a more reliable budget and a more competitive position when you make an offer.
Updated July 21, 2026
Disclaimer
Dara provides this glossary for general educational purposes only. It is not financial, legal, or tax advice, and availability, fees, and terms vary by country and corridor.
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