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When does a mortgage become a jumbo loan, and why do cash reserves matter so much?
If you’re buying a home in Houston and need to borrow more than the 2026 conforming loan limit of $832,750, you’ll usually need a jumbo loan. Jumbo loans have stricter lending requirements than standard mortgages. Most lenders look for strong credit, a healthy down payment and enough cash reserves to show you can comfortably afford the home after closing.
Many buyers assume their income is the biggest hurdle. In reality, lenders often pay just as much attention to the money you’ll still have available after you’ve completed your purchase.
By Shian Munro, Realtor® | June 2026
Why More Houston Buyers Are Using Jumbo Loans
Houston’s luxury market continues to attract buyers from across the United States and around the world. Whether you’re relocating for work, moving into a larger family home or buying your first luxury property, it’s becoming easier to cross into jumbo loan territory.
For 2026, the conforming loan limit for a one-unit property in Harris County is $832,750. If your loan amount is above that figure, you’ll generally need a jumbo loan.
One point often catches buyers out. Houston is not considered a high-cost lending area. Some counties in California, New York and a small number of other states qualify for higher conforming loan limits because property prices are significantly higher. Harris, Fort Bend, Montgomery and Waller counties do not qualify.
That means a buyer financing $900,000 on a home in Memorial, River Oaks, Bridgeland or Sugar Land will normally be applying for a jumbo mortgage.
As more buyers move into Houston’s luxury market, more people are discovering these lending rules for the first time.
Income Matters. Cash Reserves Often Matter Just As Much.
One of the biggest surprises for buyers is that earning a high income doesn’t automatically guarantee loan approval.
Lenders certainly want to see stable earnings. They also want to know you’ll still be financially secure after you’ve bought your home.
That’s where cash reserves become important.
Cash reserves are the funds you still have available after paying your down payment, closing costs and other purchase expenses. Depending on the lender, those funds may need to cover several months of future mortgage payments.
Every lender has different guidelines, but many work along similar lines.
Around $1 million: many lenders may look for around six months of mortgage payments in reserve.
Around $2 million: many lenders may look for around twelve months of reserves.
Larger jumbo loans: many lenders may require additional reserves depending on the loan and your financial profile.
Some lenders also consider the financial commitments attached to other properties you already own. That could include your current home, a second property or an investment property that you haven’t sold yet.
This is something I see with relocating buyers quite regularly.
Someone moving from another state or another country may still own a property back home while buying in Houston. Their income may comfortably support the new mortgage, but the lender may also consider the costs associated with the existing property.
Planning ahead can make a significant difference.
Self-Employed or Bonus Income?
Houston attracts professionals from industries where income isn’t always made up of salary alone.
That is especially common across energy, healthcare, finance and executive leadership roles, where bonuses or commission can form a significant part of annual earnings.
Many lenders will include that income when assessing your application, provided they can see a consistent history. In many cases, they ask for around two years of bonus or commission income before using it in their calculations, although requirements vary between lenders.
Self-employed buyers should also expect to provide additional documentation. Tax returns, business financial statements and evidence of stable income are all common parts of the underwriting process.
None of this should discourage you.
It simply means it’s worth speaking with your lender early so there are no surprises once you’ve found the right home.
Buying From Overseas?
Many of my relocation clients move to Houston from the UK, Europe and other parts of the world.
If you’re using savings held overseas, or money from selling a home abroad, your lender will usually ask you to provide clear documentation showing where those funds came from.
Depending on your circumstances, you may also need additional paperwork if you’ve only recently arrived in the United States or haven’t yet established a US credit history.
This is completely normal.
It’s simply part of the lender’s responsibility to verify the source of funds before approving your mortgage.
Starting that process early can save a great deal of time later, especially once you’re under contract and working towards your closing date.
Are Low Down Payment Jumbo Loans Available?
One of the biggest misconceptions about jumbo loans is that every buyer needs a 20% down payment.
That simply isn’t true.
Some lenders offer jumbo loan programmes with down payments as low as 5% for exceptionally well-qualified borrowers. These loans usually come with stricter lending requirements. Lenders often expect higher credit scores, stronger cash reserves and lower debt-to-income ratios.
For many buyers, putting more money down is still the better financial choice. A larger down payment can reduce your monthly payment, improve the interest rate available and strengthen your application.
That’s why it’s worth comparing several loan options before making a decision. The lowest upfront payment doesn’t always mean the lowest overall cost.
Preparing Before You Start House Hunting
One of the best things you can do is organise your finances before you begin viewing homes.
A pre-approval tells you how much you may be able to borrow. Just as importantly, your lender should explain how much you’ll need to keep in reserve after closing. That figure is often overlooked, but it can be just as important as your purchase budget.
If you’re relocating from another state or another country, discuss any property you still own with your lender. They can explain how an existing mortgage may affect your application and whether you’ll need additional reserves.
If you’re transferring funds from overseas, begin gathering your paperwork early. Clear records showing where your money has come from can help avoid delays later in the process.
The earlier these conversations happen, the smoother your purchase is likely to be.
Why Planning Ahead Matters
One thing I’ve learned from helping relocation clients is that financing itself is rarely the biggest challenge.
Delays usually happen because buyers discover an extra requirement after they’ve found the home they want to buy.
Perhaps the lender needs additional bank statements. Maybe they need more evidence of bonus income, or further documentation for overseas funds.
None of these situations are unusual.
They simply take time to resolve.
By dealing with them before you begin house hunting, you can concentrate on finding the right home instead of worrying about paperwork and deadlines.
My Advice
Luxury homes in Houston often attract strong interest when they’re priced correctly.
The last thing you want is to find the perfect property and then discover your lender needs more information before they can issue final approval.
I always encourage my clients to build their financing team before they begin viewing homes. Speak with a lender who regularly works with jumbo loans. If you’re relocating internationally, choose someone who also understands overseas income, foreign assets and international transfers.
Once your financing is in place, everything else becomes much easier.
You’ll understand your budget, know your monthly costs and feel much more confident when it’s time to make an offer.
Frequently Asked Questions
What is a jumbo loan?
A jumbo loan is a mortgage that exceeds the conforming loan limit set each year by the Federal Housing Finance Agency. For a one-unit property in Harris County, the 2026 conforming loan limit is $832,750.
Do I always need a 20% down payment?
No. Some lenders offer jumbo loan programmes with lower down payments for well-qualified borrowers. The exact requirements depend on the lender, your credit profile and the size of the loan.
Why do lenders ask about cash reserves?
Cash reserves show that you’ll still have available funds after buying the property. Many lenders want to see enough savings to cover several months of mortgage payments, although the exact requirement varies.
Can bonus or commission income count towards a jumbo loan?
Yes. Many lenders will consider bonus or commission income if you have a consistent history of receiving it. They often ask for around two years of documentation before including that income in their assessment.
Can I use money from overseas for my down payment?
Yes. Most lenders will accept overseas funds provided you can clearly document where the money came from. They may ask for additional paperwork before approving the loan.
Does owning another property affect my application?
It can. Some lenders consider the financial commitments attached to properties you already own when assessing your overall financial position.
About Shian Munro
I’m Shian Munro, a British Realtor® with Coldwell Banker Realty, based in Katy, Texas. Having relocated internationally several times myself, I understand that buying a home is only one part of moving to a new city or country.
I specialise in relocation and luxury homes, helping clients moving locally, nationally and internationally make informed decisions with confidence. My role isn’t simply to help you find the right property. It’s to guide you through the entire journey, from understanding neighbourhoods and financing through to settling into your new community.
Whether you’re buying your first home in Houston or relocating for a new career opportunity, my goal is to make every move as smooth and enjoyable as possible.
A global perspective, tailored locally.
Sources
Federal Housing Finance Agency (FHFA) – 2026 conforming loan limits.
Fannie Mae Selling Guide and Freddie Mac Seller/Servicer Guide.
Individual lender jumbo mortgage guidelines. Lending requirements vary by lender and borrower.
This article is provided for general information only. Mortgage guidelines vary between lenders and may change over time. Always seek advice from a qualified mortgage professional before making financial decisions.
