A jumbo loan is simply a mortgage that’s larger than the conforming loan limit set each year by the FHFA. Once your loan amount crosses that line, Fannie Mae and Freddie Mac won’t buy it, so the lender has to hold more risk on the loan or sell it to a different kind of investor. FHFA publishes the official conforming loan limit values each year, county by county. That changes the underwriting: expect a closer look at your credit, more reserve requirements, and sometimes a slightly different rate structure. In markets like Scottsdale and Los Angeles, jumbo isn’t a niche product — it’s often just what it takes to buy a normal single-family home.
What Counts as a Jumbo Loan Right Now
The conforming limit changes annually and it’s higher in what the FHFA calls “high-cost” counties. Maricopa County (Scottsdale, Phoenix) sits at the baseline limit most years, while Los Angeles County — a permanent high-cost area — has a ceiling that’s meaningfully higher. That gap matters. A $950,000 loan might be conforming in LA but jumbo in Scottsdale. I always tell clients: don’t assume your loan size based on a number you saw in a national article. Ask what the actual limit is for the county the property sits in, for that specific year, because it moves.
In Colorado, counties like Pitkin (Aspen) and Eagle (Vail) also carry higher limits than the rest of the state. Denver metro is usually at baseline. Nebraska, outside of a few pockets, stays close to the baseline limit statewide — jumbo loans there tend to show up more with acreages, custom builds, or lake properties than with typical subdivision homes.
Why Jumbo Underwriting Feels Different
Conforming loans follow automated underwriting rules that are pretty standardized. Jumbo loans are underwritten to each lender’s own guidelines, since there’s no Fannie or Freddie backstop. That means more manual review, and honestly, more variation between lenders. Some of what I see consistently:
- Credit score minimums run higher. Where a conforming loan might work with a mid-600s score, most jumbo programs want to see well into the 700s, and the strongest pricing usually goes to borrowers north of that.
- Debt-to-income gets scrutinized more tightly. Lenders want comfortable room, not a DTI that’s right at the edge of approval.
- Down payments are typically larger. Twenty percent down is common on jumbo purchases; some programs go lower for very strong borrowers, but don’t plan around that.
- Documentation is thorough. Full income verification, two years of returns if you’re self-employed, and a clear paper trail on large deposits.
None of this means jumbo financing is hard to get if your file is solid. It just means there’s less room for shortcuts than there is on a conforming loan.
Reserve Requirements: The Part People Underestimate
This is where I see the most surprised clients. On a conforming loan, reserves — liquid assets left over after closing — might not be required at all, or might be light. On jumbo loans, lenders commonly want to see six to twelve months of mortgage payments (principal, interest, taxes, insurance, and HOA dues if applicable) sitting in reserve after your down payment and closing costs are covered. Some programs ask for more if you’re buying a second home or an investment property, or if your income is variable.
Here’s a simple example. Say you’re buying a home in Paradise Valley with a monthly payment of roughly $8,500 once you include taxes and insurance. A lender asking for nine months of reserves wants to see around $76,500 in liquid or near-liquid assets — separate from your down payment and closing funds — sitting in checking, savings, or eligible investment accounts. That’s not unusual for a jumbo file, and it’s worth planning for well before you go under contract.
Scottsdale and Los Angeles: Two Different Jumbo Realities
These two markets show why jumbo lending isn’t one-size-fits-all.
In Scottsdale, jumbo loans are the default for a huge share of purchases north of the median — think Silverleaf, DC Ranch, or older Arcadia homes that have appreciated well past what the conforming limit covers for Maricopa County. Buyers here often have strong W-2 income or business income from Arizona’s growing professional and tech sectors, but I also see a lot of self-employed borrowers and retirees relying on investment income, which pushes reserves and documentation into a bigger role in the approval.
In Los Angeles, the high-cost conforming limit gives buyers more breathing room before they hit jumbo territory, but home prices are high enough that jumbo is still the norm in most coastal and Westside neighborhoods. LA jumbo files also tend to involve more complex income — equity compensation, entertainment industry 1099 income, rental income from other properties — which means underwriters spend real time on the details. If your income doesn’t look like a simple pay stub, budget extra time for the process and get your documentation organized early.
Rate Behavior and Loan Structure
Jumbo rates don’t automatically track conforming rates in the same direction or by the same amount — sometimes jumbo pricing is very close to conforming, other times there’s a noticeable gap, depending on investor appetite at the time. I won’t quote numbers here because they shift constantly, but I will say this: shop the jumbo quote specifically rather than assuming it mirrors whatever conforming rates are doing that week.
You’ll also see more structure options in jumbo lending — interest-only periods, adjustable-rate structures with longer fixed periods, and sometimes portfolio products tailored to high-net-worth borrowers with concentrated assets. These aren’t right for everyone, and I’ll say plainly: if you’re not comfortable with payment changes down the road, a straightforward fixed-rate jumbo is usually the more sensible choice, even if it’s not the most creative one.
Getting Your Jumbo File Ready
Before you start touring homes above the conforming limit, get a real sense of what a lender will actually want to see. Run your numbers with a payment calculator to understand what different loan amounts do to your monthly payment and reserve target, then talk to someone who can review your full picture — income, assets, and credit — before you’re under contract with a deadline looming. You can get pre-approved and find out exactly where you stand on credit, income documentation, and reserves specific to your situation.
FAQ
Do jumbo loans always require 20% down?
Not always, but it’s the most common structure. Some programs go lower for well-qualified borrowers with strong credit and reserves, subject to credit approval and lender guidelines at the time.
Is a jumbo loan riskier than a conforming loan?
Not inherently — it’s underwritten more conservatively precisely because there’s no Fannie/Freddie backstop. For a well-qualified borrower, a jumbo loan is a standard, well-established way to finance a higher-value home.
Can self-employed borrowers get jumbo financing?
Yes, regularly. It just requires thorough documentation — typically two years of tax returns and a clear picture of business income — since jumbo underwriting doesn’t rely on automated approval shortcuts.
Is the home you’re considering above its county’s conforming limit—and how much may you need to keep in reserves after closing? Explore our jumbo loan options before you get deep into touring properties in Scottsdale, Los Angeles, or another high-value market.
This article is general education, not financial advice or a commitment to lend. Loan programs, terms, and availability are subject to credit approval and may change. Loanatik LLC is an Equal Housing Lender. See our licensing & disclosures.
A jumbo loan is simply one that exceeds the conforming loan limits set each year for your county, which is what puts it outside what Fannie Mae and Freddie Mac will buy.