If you’re curious if your loan amount puts you into jumbo loan territory, my jumbo mortgage calculator should be of some use.
It will determine if you’re above or below the conforming loan limit for your county and if so, by how much.
From there, you can decide if it makes sense to bring more money to the closing table to avoid jumbo territory as they can be harder to qualify for.
Or if a second piggyback mortgage could make sense instead of just a single, jumbo loan, keeping the first loan below the limit.
The calculator will also estimate your monthly payment factoring in taxes and insurance, and even calculate the cash reserves needed to qualify.
Jumbo Mortgage Calculator
Estimate your monthly payment on a jumbo mortgage — a loan that exceeds Fannie Mae/Freddie Mac conforming loan limits — and see exactly how far above (or below) the 2026 conforming loan limit your loan amount falls for your area and unit count.
Purchase & Loan
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High-cost counties are concentrated in coastal California, the NYC and DC metro areas, and a few other pricey markets — about 100 counties nationwide
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Jumbo minimums vary widely by lender and loan size — often 10-20%+
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Of purchase price, per year — check your local rate for accuracy
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Higher-value homes often cost meaningfully more to insure
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Of loan amount, per year. Many jumbo lenders waive this entirely, even below 20% down — confirm with your specific lender
🗺️ Alaska and Hawaii (along with Guam and the U.S. Virgin Islands) get a higher conforming loan limit automatically, everywhere in those areas — not just in specific “high-cost” counties like the rest of the country. Hawaii also has its own additional high-cost county (Maui County) that goes higher still. Select the matching option above if your property is in one of these areas. If you’re unsure exactly which limit applies to your specific county, FHFA publishes the full 2026 county-by-county loan limit list — worth a quick check before you rely on this calculator’s simplified area options.
💡 Jumbo underwriting is set by each individual lender, not by a single national rule the way FHA and VA loans are. Down payment minimums, reserve requirements, and whether PMI applies at all vary meaningfully from lender to lender — the figures here are typical starting points, not guarantees. Get a quote from a jumbo-specific lender for the numbers that will actually apply to you.
🧩 A piggyback loan can help you avoid jumbo financing altogether. Structures like an 80-10-10 split your financing into a first mortgage that stays at or under the conforming limit plus a smaller second mortgage (often a HELOC or fixed-rate home equity loan) for the rest — so instead of one jumbo loan, you get two conforming-friendly ones, which can mean easier underwriting and sometimes a better blended rate. Run the numbers with our Piggyback Loan Calculator to see if it beats jumbo financing for your scenario.
Closing costs run higher in dollar terms on a larger jumbo loan even at a similar percentage — get a fuller estimate of cash needed to close.
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Principal & interest only — taxes, insurance, HOA, and mortgage insurance don’t amortize, so they’re excluded here.
Disclaimer: This calculator is for informational and educational purposes only and does not constitute financial, legal, or tax advice. It does not guarantee loan approval, a specific interest rate, or specific underwriting terms. Conforming loan limits shown reflect FHFA/Fannie Mae’s official 2026 figures per Lender Letter LL-2025-04 ($832,750 baseline / $1,249,125 high-cost ceiling for a 1-unit property in the contiguous U.S., with higher limits for 2-4 unit properties) and determine only whether a loan is classified as conforming, high-balance, or jumbo — they say nothing about your personal qualification for any loan amount. High-cost designation in the contiguous U.S. is county-specific and covers roughly 100 counties nationwide. Alaska, Hawaii, Guam, and the U.S. Virgin Islands receive the elevated $1,249,125-tier limit everywhere, automatically, with Hawaii’s own high-cost county (Maui) going higher still to $1,299,500; Puerto Rico, by contrast, uses the standard $832,750 baseline with no high-cost tier at all. If you’re unsure exactly which limit applies to your specific county, check FHFA’s published full county-level loan limit list or ask your lender directly, since this calculator offers a simplified set of area options rather than a full county-by-county lookup. Jumbo loan down payment minimums, reserve requirements, mortgage insurance requirements, and rates are set independently by each lender and vary significantly by loan size, credit profile, and property type — the defaults shown here are general starting points only. Actual results depend on your specific loan terms, local tax and insurance costs, and lender overlays. Consult a licensed mortgage professional for guidance specific to your situation.
How to Use the Jumbo Mortgage Calculator
To get started, first determine if your county (where the property is located) is a standard-cost or high-cost region.
There’s a link to the 2026 county-by-county loan limits to help you determine this. Just search for your county and if it says $832,750 for a one-unit property, select standard-cost county from the list.
If it’s higher than $832,750, select high-cost county.
Other categories include Alaska, Hawaii, Guam and the U.S. Virgin Islands (non-contiguous).
And the Hawaii high-cost counties, which are slightly higher still.
From there, you’ll need to enter the purchase price, the number of units (one if it’s a single-family home), 2-4 for multi-unit, the down payment (percentage), and the mortgage interest rate.
You can also enter your property tax rate, annual homeowners insurance, and any HOA dues or mortgage insurance (if applicable).
Once you hit submit, the calculator will tell you if your loan amount is conforming, high-balance conforming, or a jumbo loan.
And if it’s conforming, it will tell you how much more you can borrow while still staying below the jumbo loan limit (if you wish to borrow even more).
A high-balance conforming loan still qualifies for financing from Fannie Mae or Freddie Mac, but will typically be priced higher than a conforming loan.
This means a higher mortgage rate and/or more closing costs.
The results also provide your monthly housing payment and show you how much interest you’ll pay over the life of the loan.
In addition, if it’s a jumbo loan you’ll see an estimate of the reserves required by your lender, based on the calculated monthly payment.
Jumbo loans often require a certain amount of monthly payments set aside for qualifying purposes.
A typical requirement is six months of reserves for jumbo loans, meaning you have to show proof of six months of PITI in a verifiable bank account or other acceptable asset to qualify.
Before creating this site, I worked as an account executive for a wholesale mortgage lender in Los Angeles. My hands-on experience in the early 2000s inspired me to begin writing about mortgages 20 years ago to help prospective (and existing) home buyers better navigate the home loan process. Follow me on X for hot takes.
