Mortgage basics, without the jargon
A mortgage is a loan secured by real estate. You borrow money to buy a home, pay it back over a fixed number of years with interest, and the property serves as collateral until the loan is paid off. That single sentence covers the legal mechanics — but the actual decisions you make in those first few weeks (loan type, down payment, lender, lock strategy) shape what you pay for the next 15 to 30 years.
This guide walks through the structure of a mortgage, the main loan types you'll see in the United States in 2026, what lenders are actually evaluating, and the conversations worth having with a licensed mortgage loan officer (MLO) before you sign anything.
If you're early in the process, two foundational pieces pair well with this one: our credit score and mortgage guide and our down payment strategies guide. When you're ready to model your numbers, our mortgage calculator and affordability calculator let you test scenarios before talking to anyone.
The anatomy of a monthly mortgage payment
Most homeowners think of their payment as one number. Lenders break it into pieces, and so should you.
- Principal. The portion of the payment that reduces what you owe.
- Interest. What the lender charges for letting you borrow the principal.
- Property taxes. Local government assessments. On most loans the lender collects 1/12 of the annual bill with each payment and pays the county on your behalf through an escrow account.
- Homeowners insurance. A required hazard policy, usually collected through the same escrow account.
- Mortgage insurance (MI or PMI). Charged when your down payment is below 20% on conventional loans, or for the life of most FHA loans. VA and USDA do not use traditional mortgage insurance but have their own guarantee or funding fees.
- HOA or condo dues. Not part of PITI, but the lender will count them when calculating your debt-to-income ratio.
The shorthand acronym is PITI (principal, interest, taxes, insurance). When a loan officer talks about your "qualifying payment," they usually mean PITI plus mortgage insurance and HOA dues if applicable.
The main loan types you'll hear about
There are four buckets that cover most US borrowers in 2026. The right one depends on your credit, income documentation, the property, and how much you're putting down.
Conventional loans (Fannie Mae and Freddie Mac)
Conventional loans follow rules set by Fannie Mae and Freddie Mac, the two government-sponsored enterprises that buy the majority of US mortgages on the secondary market. For 2026, the baseline conforming loan limit in most US counties is $832,750 for a one-unit property, with higher limits in designated high-cost areas — verified annually by the Federal Housing Finance Agency. Use our conforming limit lookup tool to check the limit for a specific county.
Conventional loans typically need a credit score of 620 or higher. Down payments start at 3% for many first-time buyers through programs like Fannie Mae HomeReady and Freddie Mac Home Possible. Putting down less than 20% triggers private mortgage insurance, which can be removed once you reach 20% equity. Read the conventional loan overview for a deeper walkthrough.
FHA loans
FHA loans are insured by the Federal Housing Administration. They allow down payments as low as 3.5% with a credit score of 580, and 10% down with a score between 500 and 579. The trade-off is mortgage insurance: both an upfront premium and a monthly premium that, on most current FHA loans, lasts for the life of the loan unless you refinance. They're a common path for first-time buyers and borrowers with thin or rebuilding credit. See FHA loans for program details and eligible property types.
VA loans
VA loans are guaranteed by the US Department of Veterans Affairs for eligible veterans, active-duty service members, and certain surviving spouses. They offer 0% down, no monthly mortgage insurance, and competitive rates. There is a one-time VA funding fee that varies by service category, down payment, and whether it's your first use. Eligible borrowers should rarely use anything else without a clear reason. See the VA loan overview.
USDA loans
USDA Rural Development loans offer 0% down for eligible borrowers in designated rural and some suburban areas, subject to household income limits. The eligibility map and income limits are maintained by USDA Rural Development. See USDA loans.
Beyond the standard four
If your situation doesn't fit those four cleanly, you'll hear about jumbo loans (above the conforming limit — see jumbo loans), non-QM loans (alternative documentation for self-employed or complex income — see non-QM loans), bank-statement loans for 1099 and small-business owners (covered in our self-employed income guide), DSCR loans for real-estate investors qualifying from rental cash flow (see DSCR), ITIN loans for borrowers without a Social Security number (ITIN), and foreign-national loans for non-US residents (foreign-national).
Fixed-rate vs. adjustable-rate
A fixed-rate mortgage locks the interest rate for the full loan term. Your principal and interest payment never changes. Most US borrowers pick a 30-year fixed because the lower monthly payment buys flexibility; some pick a 15-year fixed to build equity faster and pay roughly a third of the lifetime interest.
An adjustable-rate mortgage (ARM) carries a fixed rate for an initial period — commonly 5, 7, or 10 years — then adjusts at set intervals based on an underlying index plus a margin. Modern ARMs use the SOFR index. They have rate caps that limit how much the rate can move at each adjustment and over the life of the loan. ARMs can make sense when the initial rate is meaningfully below the comparable fixed rate and you have a credible plan to sell, refinance, or pay down the loan before the adjustment period.
Neither is universally "better." It's an exercise in matching the product to how long you actually expect to keep the loan.
What underwriters are really looking at
Underwriting is the process of confirming that the file in front of the lender matches what was claimed on the application. Four buckets do most of the work.
- Credit. Score, depth of file, recent inquiries, late payments, derogatory accounts. Different loan programs have different minimums. See the credit score guide for what improves a file fastest.
- Income. W-2, salary, bonus, self-employment, rental, retirement, or alimony — each documented differently. Two years of consistent income is the typical baseline. Self-employed borrowers have their own playbook; see how lenders calculate self-employed income.
- Assets. Reserves for closing costs, the down payment itself, and post-close reserves. Lenders care about both the amount and where it came from — large recent deposits get questioned.
- The property. Appraised value, condition, property type (single-family, condo, multi-unit), and intended occupancy (primary, second home, investment).
Your debt-to-income (DTI) ratio ties the income and credit pieces together. It's monthly debts (including the proposed new housing payment) divided by gross monthly income. Conventional loans typically allow DTIs into the mid-40s with strong compensating factors; FHA can stretch higher; VA is often more flexible on the housing-payment portion specifically. The exact ceiling for your scenario depends on the program and the automated underwriting decision.
The pre-approval, then everything else
The application sequence usually looks like this:
- Pre-qualification. Quick estimate from rough numbers. Useful for orientation, not for offers.
- Pre-approval. Lender pulls credit, reviews pay stubs, W-2s, bank statements, and runs the file through automated underwriting. Result is a conditional commitment letter. This is what listing agents want to see attached to an offer.
- Property under contract. You make an offer, the seller accepts, and the lender attaches the specific property to your file.
- Processing and appraisal. The lender orders a third-party appraisal, verifies employment, and reviews title.
- Underwriting. A human underwriter reviews the full file against the program guidelines.
- Clear to close and funding. Final documents are drawn, you sign at closing, and the loan funds.
Most healthy purchase files close in 21 to 35 days from contract to keys, though that varies by lender, loan type, and how quickly conditions are returned. Refinances run on their own timeline.
How to pick a loan officer
The MLO who originates your loan has more day-to-day influence on the experience than the lender brand. A good loan officer explains program trade-offs in plain English, runs realistic scenarios for your file, and surfaces problems early — not the night before closing.
A few practical filters:
- Verify the license. Every US loan officer has an NMLS identifier. Cross-check the number on NMLS Consumer Access before sharing personal information. Our NMLS lookup tool opens directly into that flow.
- Match on program, not just location. A first-time buyer using FHA wants someone fluent in FHA. A self-employed borrower wants someone fluent in bank-statement and non-QM programs. Browse by program on the loan-types index.
- Match on geography. Local market knowledge matters, especially for condos and on properties with HOAs or unusual conditions. Browse loan officers in the city you're buying in via the state index and city pages.
- Read claimed profiles carefully. Claimed profiles on MLO Finder show specialties, license states, company affiliation, and contact options. Use search to filter by name, NMLS number, company, or city.
Common questions before the first call
A loan officer's first 15-minute call should be about your scenario, not a product pitch. Reasonable things to ask:
- Which loan programs is my file actually a candidate for?
- What credit score is the rate sheet pricing me at right now, and what would the next pricing tier require?
- What's my realistic DTI under each program?
- What documentation will you need from me to issue a pre-approval letter?
- How do you handle rate locks, and what happens if rates move while we're under contract?
- Are there any program overlays your lender adds beyond the agency guidelines?
You don't need to ask all of those — but a loan officer who can answer them clearly is usually worth a second call.
Where MLO Finder fits
MLO Finder is a directory. We do not originate loans, broker loans, or take applications. Our job is to make it easier to compare licensed mortgage loan officers and verify them against the official NMLS record before you reach out. Once you have your numbers in hand, search the directory and shortlist a few officers who fit your loan type and market.