In Texas, a single-family mortgage over $832,750 counts as a jumbo loan in 2026, and that threshold applies the same way in Harris County, Montgomery County, and everywhere else in the state. Jumbo financing for a luxury home in the Houston area generally takes 10 to 20 percent down, a credit score in the 700s, and 12 to 24 months of mortgage payments sitting in reserve after closing. The exact numbers move by lender, sometimes by a lot.

Most of the luxury conversations we have start with cash versus financing, and we have covered that trade-off before. This piece is for the buyer who already knows they are financing and wants the real numbers on what a jumbo loan requires, not the marketing version.

Where the Jumbo Line Sits in 2026

The conforming loan limit for a one-unit home is $832,750 across Texas this year. Anything financed above that number falls outside what Fannie Mae and Freddie Mac will buy, so the lender holds more of the risk itself, or sells it to a private investor with its own rules. That is the entire reason jumbo loans work differently: nothing about the house changes at that number, only who is willing to lend against it and on what terms.

The Down Payment Is Not What It Used to Be

Twenty percent down still gets you the best rate and skips mortgage insurance entirely, and it remains the most common down payment we see on a Houston-area jumbo purchase. Ten percent down is real and available, but it comes with a tighter credit and reserve bar than the twenty percent path. A newer wrinkle worth knowing about: some lenders are now offering jumbo programs with down payments as low as 5 percent, and a few low-down-payment jumbo products in Houston, Dallas, Austin, and San Antonio go as high as 95 percent financing for qualified borrowers. Those programs are not universal and the underwriting on them runs stricter, so treat any specific number a lender quotes as that lender's offer, not the market standard.

• Credit score: most jumbo lenders want 700 to 720 or higher
• Debt-to-income ratio: generally capped around 43 percent
• Reserves: 12 to 24 months of mortgage payments in liquid assets after closing
• Down payment: 10 to 20 percent is typical, with narrower low-down options available to strong borrowers

What Underwriting Is Checking

A jumbo underwriter is not re-running the same conforming checklist at a bigger number. Reserves get real scrutiny, because a lender holding a $1.5 million loan on its own books wants proof you can keep paying it if your income takes a hit, not only proof you can close. Appraisals get more attention too, for the same reason our piece on why luxury homes are harder to appraise lays out: fewer comparable sales at the high end make the number itself harder to defend, and a jumbo lender watches that number hard because there is no Fannie Mae or Freddie Mac backstop if it turns out wrong.

Financing Instead of Paying Cash

Cash dominates a real share of the Houston luxury market right now, and we have written before about when paying cash for a luxury home makes sense. Financing is not a consolation prize. A buyer who would rather keep capital invested elsewhere, or who wants the interest deduction, is often better served by a well-structured jumbo loan than by tying up seven figures in a house. The math depends entirely on what else that cash would be doing.

Our Take

Peter came up through construction and mortgage lending before he ever sold a home, and the mistake we see most with jumbo financing is a buyer who gets pre-qualified with one lender's numbers and assumes every lender will land in the same place. They do not. Two jumbo lenders can hand the same borrower two different down payment requirements and two different rates on the same house. We would rather you shop that decision the way you shop the house itself, before you are three weeks from closing and stuck with the first offer you got. Our Luxury page has the rest of what we cover for buyers and sellers at this price point.

Jumbo Loan Questions We Hear

What loan amount is considered jumbo in Texas in 2026?
Any single-family loan over $832,750 in 2026, the standard conforming loan limit that applies across every Texas county, including Harris and Montgomery.

How much down payment do you need for a jumbo loan in Houston?
Most jumbo lenders want 10 to 20 percent down. Twenty percent unlocks the best rates and removes mortgage insurance, while 10 percent options exist but come with stricter credit and reserve requirements.

What credit score do you need for a jumbo loan?
Most jumbo lenders look for a credit score of 700 to 720 or higher, noticeably above what a conforming loan typically requires.

How much in reserves do jumbo lenders require?
Many jumbo lenders want to see 12 to 24 months of mortgage payments sitting in liquid reserves after closing, on top of the down payment and closing costs.

Peter & Vicky Royster
The Move Live Love TX Team™
Houston Real Estate Specialists
Family First. Texas Roots. We've Got You Covered.™
10200 Grogans Mill Rd., Suite 125
The Woodlands, TX 77380
(713)-805-6247
www.movelivelovetx.com