Most buyers start with a price range and treat the mortgage as paperwork they’ll sort out at the end. That order is backwards. The loan you pick decides what you can actually afford, how quickly you build equity, and how much room you have to move if your life changes in five years.
The US mortgage market isn’t one product with a few variations. It’s a handful of families of loans, each built for a different borrower and a different situation. Here’s what they are, what they cost, and where they tend to trip people up.
Fixed-Rate Mortgages: The Default for a Reason
A fixed-rate mortgage locks your interest rate for the whole term. Principal and interest never move, no matter what the market does. Taxes and insurance can shift year to year, but the loan itself stays put.
Roughly nine in ten new US mortgages are fixed-rate, and for most buyers that’s the sensible choice. On a $400,000 loan at 6.5%, you’re paying about $2,530 a month. That same number applies in year one and in year twenty-nine.
30 Years vs. 15 Years
Term length is the biggest lever you control. A 15-year loan typically comes with a lower rate, say 5.75% instead of 6.5%, but the payment climbs to roughly $3,320. You own the house outright in half the time and save well over $100,000 in interest. You also need about $800 more every month for fifteen straight years.
The 30-year wins for anyone who wants breathing room or would rather invest the difference. The 15-year wins if you’re close to retirement, debt-averse, or simply want the thing paid off.
Adjustable-Rate Mortgages: Cheaper Now, Unknown Later
An ARM holds a fixed rate for an introductory period, usually 5, 7, or 10 years, then adjusts on a set schedule. A 5/6 ARM is locked for five years and can change every six months after that.
The trade is simple. You get a lower starting rate, maybe 6% instead of 6.5%, which saves around $125 a month on that same $400,000 loan. In exchange, you take on whatever rates do after year five.
Read the Caps Before You Sign
Every ARM has three caps limiting how high your rate can climb:
- Initial adjustment cap — the most it can jump at the first reset, often 2 percentage points.
- Subsequent adjustment cap — the limit at each later reset, typically 1 point.
- Lifetime cap — the ceiling above your starting rate, usually 5 points.
A 6% ARM with a 5-point lifetime cap can theoretically reach 11%. That’s a worst case, not a forecast, but you should be able to survive it. ARMs make the most sense when you’re confident you’ll sell or refinance before the first reset hits.
Government-Backed Loans: FHA, VA, and USDA
These three programs exist to make borrowing easier for specific groups. None of them is free. Each carries fees or insurance, but each also lowers the barrier to entry.
FHA Loans
Backed by the Federal Housing Administration, FHA loans allow down payments as low as 3.5% with a credit score of 580. On a $350,000 home, that’s $12,250 down. The catch is mortgage insurance: 1.75% of the loan upfront plus an annual premium around 0.55%, which works out to roughly $155 a month. That money buys you nothing in equity.
If you’re comparing these against conventional options, this breakdown of mortgage types for low down payment buyers shows how the real monthly costs stack up.
VA Loans
For veterans, active-duty service members, and some surviving spouses. Zero down payment, no monthly mortgage insurance, and rates that often undercut everything else on the market. The funding fee runs 2.15% for first-time use with no down payment, though borrowers with service-connected disabilities are usually exempt. On a $400,000 purchase that fee is $8,600, and it’s typically financed, so you pay interest on it for decades.
USDA Loans
Also zero down, but restricted to rural and some suburban areas, with household income limits attached. The 1% upfront guarantee fee and 0.35% annual fee are far gentler than FHA’s insurance. If you qualify, it’s one of the cheapest routes into homeownership available.
Jumbo Loans: When the House Exceeds the Limit
Most conventional loans are capped by the conforming loan limit, which sits at $806,500 for a single-family home in 2025 in typical markets and runs higher in expensive counties. Borrow more than that and you’re in jumbo territory.
Jumbo rates used to carry a premium. Today plenty of lenders price them competitively with conforming loans, sometimes below. What changes is the underwriting. Expect to put down 10% to 20%, show six to twelve months of reserves, and produce heavier documentation. If your credit is thin or your income is complicated, a jumbo is a steeper hill.
Specialty Mortgages Worth Knowing About
Balloon Mortgages
Short term, usually five to seven years, with low or interest-only payments and the full balance due at the end. They suit investors flipping property or borrowers who know they’ll refinance or sell in time. They ruin anyone who can’t. Read up on how balloon mortgages work and when they make sense before considering one, because the exit plan is the entire deal.
Farm and Agricultural Loans
Land, outbuildings, and rural acreage get underwritten differently than a suburban house. Lenders look at soil quality, water rights, and whether the property can generate income, not just your W-2. A full farm mortgage explained is worth reading if you’re buying acreage, since FSA and Farm Credit programs behave nothing like a standard bank loan.
Investment Property Mortgages
Rental loans generally cost more: rates typically run half a point to three-quarters of a point above a primary residence, down payments land at 20% to 25%, and lenders will count projected rent toward your qualifying income. If that’s your plan, this step-by-step walkthrough of getting an investment property mortgage runs the numbers on a real deal.
There’s also the second-home mortgage, which sits between the two: a slightly higher rate than a primary residence and a down payment that usually starts at 10%.
How to Narrow It Down Without Regret
Forget hunting for the “best” mortgage. There isn’t one. There’s the one that fits your timeline, your cash, and your tolerance for risk. Work through these questions honestly:
- How long will you stay? Under seven years, an ARM’s lower rate often beats a fixed. Longer than that, fixed usually wins.
- How much can you put down? Below 10%, FHA, VA, and USDA deserve a serious look.
- Can you afford the ARM at its capped rate? If the answer is no, don’t take the ARM.
- Do you need reserves afterward? Jumbo and investment loans require cash left in the bank when the deal closes.
- Is your income steady? Self-employed buyers face extra scrutiny on every loan type, so start the paperwork earlier.
Then shop like it matters, because it does. Get quotes from at least three lenders on the same day, on the same loan terms, so you’re comparing apples to apples. The gap between a 6.4% and a 6.7% rate on a $400,000 loan is about $79 a month. Across 30 years, that’s roughly $28,000 for a difference most people never bother to check.
If this is your first purchase, a side-by-side comparison of the mortgage types for first-time home buyers will show you what each option costs over its full term, not just at closing. Pick the loan that still works if the next five years don’t go the way you planned, and you’ll rarely regret it.