What This Calculator Does
A jumbo loan is a mortgage that exceeds the conforming loan limit set by the Federal Housing Finance Agency (FHFA). Because Fannie Mae and Freddie Mac cannot purchase these loans, jumbo mortgages are held by the originating lender or sold to private investors. This calculator computes your monthly payment, total interest, and full amortization schedule for a jumbo loan, including property tax, insurance, and HOA.
For 2026, the conforming baseline limit for a single-family home is $832,750 in most of the country, with a high-cost ceiling of $1,249,125 in designated high-cost areas. Any loan above the applicable limit is a jumbo loan. Jumbo loans typically require larger down payments, higher credit scores, and more reserves than conforming loans. For a standard conforming mortgage payment, use our Mortgage Calculator. To see how much home you can afford, try our House Affordability Calculator.
2026 Conforming Loan Limits
FHFA announced the 2026 conforming loan limits on November 25, 2025. The baseline limit increased by 3.26% from 2025, reflecting the year-over-year change in the FHFA House Price Index. The table below shows the 2026 limits for 1-4 unit properties.
| Units | Baseline Limit | High-Cost Ceiling | AK/HI/GU/VI |
|---|---|---|---|
| 1-Unit | $832,750 | $1,249,125 | $1,249,125 |
| 2-Unit | $1,066,250 | $1,599,375 | $1,599,375 |
| 3-Unit | $1,288,800 | $1,933,200 | $1,933,200 |
| 4-Unit | $1,601,750 | $2,402,625 | $2,402,625 |
Source: FHFA and Freddie Mac, November 2025. High-cost ceiling is 150% of the baseline. Alaska, Hawaii, Guam, and the U.S. Virgin Islands have statutory 150% multipliers.
Current Jumbo Rates (September 2026)
As of late August 2026, the average 30-year fixed jumbo mortgage rate is approximately 6.80% according to Mortgage News Daily, with Bankrate reporting 6.76%. The 15-year fixed jumbo averages about 6.32%. Historically, jumbo rates were lower than conforming rates because jumbo borrowers were seen as lower risk. Since the pandemic, that relationship has flipped: jumbo rates now run slightly above conforming rates. The conforming 30-year fixed averaged 6.71% as of September 3, 2026 per Freddie Mac, so jumbo borrowers pay about 0.09 to 0.15 percentage points more.
Inputs Required
- Home Price: The purchase price. Jumbo loans are common for homes above $1 million.
- Down Payment: Jumbo loans typically require 20% down, though some lenders accept 10% to 15% with excellent credit. The calculator lets you choose 10% to 30%.
- Interest Rate: Your lender's quoted jumbo rate. The default is 6.80%, the approximate September 2026 average.
- Loan Term: 15, 20, or 30 years. Some jumbo lenders also offer 40-year terms or ARMs.
- Property Tax: Annual property tax as a percentage of home value. High-value homes in states like Texas or New Jersey can have significant tax bills.
- Home Insurance and HOA: Annual insurance and monthly HOA dues, which can be substantial for luxury properties.
How the Calculation Works
The monthly payment uses the standard fixed-rate amortization formula:
M = P x [r(1+r)^n] / [(1+r)^n - 1]
Where P = loan amount, r = monthly rate, n = number of payments
The total monthly payment adds property tax (annual rate divided by 12), insurance (annual divided by 12), and HOA. The amortization schedule shows how each year's payments split between principal and interest. In the early years of a 30-year jumbo loan, the vast majority of each payment goes to interest. On a $1 million loan at 6.80% for 30 years, the monthly P&I is $6,525. In year 1, only about $9,500 goes to principal while $78,000 goes to interest.
How to Use the Calculator
- Enter the home price. The calculator automatically determines whether your loan is jumbo or conforming based on the 2026 limits.
- Select your down payment percentage. Most jumbo lenders require at least 20%.
- Enter the interest rate quoted by your lender for a jumbo loan. Check current jumbo rates on Bankrate or Mortgage News Daily.
- Choose your loan term.
- Add your property tax rate, annual insurance, and monthly HOA if applicable.
- Review the total monthly payment and amortization schedule.
- Compare against a conforming loan scenario using our Mortgage Calculator if your loan amount is near the conforming limit.
Example Calculations
Example 1: $1.5 Million Home in a Standard Market
Jennifer and Mark buy a $1,500,000 home in Dallas, Texas, with 20% down at 6.80% on a 30-year fixed jumbo:
- Down payment: $300,000
- Loan amount: $1,200,000 (jumbo, above $832,750 baseline)
- Monthly P&I at 6.80%: $7,830
- Property tax (1.5% of $1.5M): $1,875/month
- Home insurance ($4,500/yr): $375/month
- Total monthly payment: $10,080
- Total interest over 30 years: $1,618,800
- Total cost (loan + down payment): $3,118,800
The total interest of $1.62 million exceeds the original loan amount. This is typical for a 30-year loan at current rates. Jennifer and Mark use the amortization schedule to see that making one extra payment per year would save about $215,000 in interest and pay off the loan 5 years earlier.
Example 2: $2.5 Million Home in a High-Cost Area
David buys a $2,500,000 condo in San Francisco with 25% down at 6.75% on a 30-year fixed jumbo:
- Down payment: $625,000
- Loan amount: $1,875,000 (super jumbo, above $1,249,125 high-cost ceiling)
- Monthly P&I at 6.75%: $12,165
- Property tax (1.0% of $2.5M, limited by Prop 13): $2,083/month
- Home insurance ($6,000/yr): $500/month
- HOA ($800/month): $800/month
- Total monthly payment: $15,548
- Total interest over 30 years: $2,504,400
David's total monthly housing cost exceeds $15,000. He needs a documented income of at least $430,000 to keep his DTI below 43% (the typical jumbo maximum). He also needs 12 to 24 months of PITI reserves in liquid assets, which is $186,000 to $373,000. The calculator helps him see the full cost before committing.
Real-World Scenarios
Conforming vs Jumbo at the Boundary
Sarah buys a $1,050,000 home in a standard market with 20% down. Her loan amount is $840,000, which is $7,250 above the $832,750 conforming baseline. This small amount makes her loan a jumbo, subjecting her to stricter requirements and a slightly higher rate (6.80% vs 6.71% conforming). By increasing her down payment to 20.7% ($217,350), she reduces the loan to $832,650, just under the conforming limit. She now qualifies for a conforming loan at 6.71%, saving $75/month and gaining access to more flexible underwriting. The extra $17,350 in down payment pays for itself in about 19 years of payment savings, plus she avoids jumbo reserve requirements. She uses our Down Payment Calculator to plan the extra savings.
Using an ARM to Lower Initial Payments
Michael finances a $1,500,000 jumbo loan with a 7/1 ARM at 6.06% (the Bankrate average for 7/1 ARMs in August 2026), compared to 6.80% for a 30-year fixed. His monthly P&I drops from $9,798 (fixed) to $9,038 (ARM), saving $760/month during the 7-year fixed period. Over 7 years, he saves $63,840. The risk is that the rate adjusts after year 7 based on the index plus margin. If rates rise, his payment could increase significantly. Michael plans to sell or refinance within 7 years, so the ARM is a calculated bet. He models the refinance scenario with our Refinance Calculator.
Jumbo Loan Reserves and Qualification
Linda applies for a $2 million jumbo loan. The lender requires 12 months of PITI in reserves, which is approximately $240,000 based on her $20,000/month total payment. She also needs a 700+ credit score (her lender requires 720), a DTI below 43%, and 2 years of tax returns showing consistent income. For self-employed borrowers, lenders typically average 2 years of business tax returns and may require a profit and loss statement. Linda's lender also requires an appraisal and, for condos, a review of the HOA's financial health. Jumbo underwriting is more manual and subjective than conforming, so working with an experienced jumbo lender matters.
Why This Calculation Matters
Jumbo loans represent a growing share of the mortgage market as home prices rise. According to the FHFA, the 2026 baseline conforming limit increased to $832,750 from $806,500 in 2025, a 3.26% increase reflecting national house price appreciation. Despite this increase, homes in many coastal and urban markets still require jumbo financing. In the San Francisco Bay Area, Los Angeles, New York, Seattle, and Boston, median home prices routinely exceed $1 million, making jumbo loans the default option for most buyers.
The total cost of a jumbo loan is substantial. On a $1.5 million loan at 6.80% for 30 years, you pay over $2 million in interest alone. Understanding this cost upfront helps you decide whether to buy a less expensive home, make a larger down payment, choose a shorter term, or wait for rates to decline. The 30-year fixed jumbo rate averaged 6.80% as of late August 2026 per Mortgage News Daily, up from about 6.50% a year earlier. Even a 0.25% rate difference on a $1.5 million loan changes the total interest by about $80,000 over 30 years.
Common Mistakes to Avoid
- Underestimating reserves: Jumbo lenders typically require 6 to 24 months of PITI in liquid reserves after closing. On a $15,000/month payment, that is $90,000 to $360,000. Make sure you have enough liquid assets remaining after the down payment.
- Ignoring the conforming boundary: If your loan amount is just above $832,750, a slightly larger down payment could move you to a conforming loan with a lower rate and easier qualification. Run both scenarios in this calculator and our Mortgage Calculator.
- Forgetting about property tax and insurance: On a $2 million home, property tax at 1.2% is $24,000/year ($2,000/month) and insurance can be $5,000+/year. These costs add significantly to your monthly payment and your reserve requirement.
- Not shopping multiple jumbo lenders: Jumbo loan pricing varies more than conforming pricing because each lender holds or securitizes these loans differently. Get quotes from at least 3 lenders, including a portfolio lender (a bank that keeps the loan on its own books) and a mortgage broker with access to multiple investors.
- Assuming jumbo rates are always higher: While jumbo rates have been slightly above conforming since 2020, some portfolio lenders offer competitive jumbo rates to attract high-net-worth clients. Check with relationship banks like First Republic, JPMorgan, or Bank of America for potential rate discounts if you maintain significant deposits with them.
Limitations of This Calculator
This calculator models a fixed-rate jumbo loan. It does not account for adjustable-rate jumbo mortgages, interest-only jumbo loans, or jumbo loans with balloon features. The conforming limit detection uses the national baseline of $832,750 and the high-cost ceiling of $1,249,125, but your specific county may have a different high-cost limit between these two values. Check the FHFA conforming loan limit lookup tool for your exact county limit. Property tax rates vary widely by location and can change after purchase. This tool does not constitute a loan approval or pre-qualification. Jumbo underwriting is more individualized than conforming, so consult a jumbo mortgage specialist for an official quote.
Authoritative Research & Resources
- FHFA: 2026 Conforming Loan Limit Announcement - Official FHFA press release announcing the 2026 conforming loan limits. The baseline limit for a 1-unit property is $832,750, an increase of $26,250 from 2025. The high-cost ceiling is $1,249,125. This is the primary source for the conforming limit data used to classify loans as jumbo in this calculator.
- Bankrate: Current Jumbo Mortgage Rates - Updated daily survey of jumbo mortgage rates from the nation's largest lenders. As of August 17, 2026, the average 30-year fixed jumbo APR was 6.79% and the 15-year fixed jumbo APR was 6.39%. Use this to find the current rate to enter into the calculator.
- Mortgage News Daily: 30-Year Jumbo Rate Index - Daily jumbo mortgage rate tracking. As of August 26, 2026, the 30-year fixed jumbo rate was 6.88% per MND's daily survey. The MBA weekly survey showed 6.71% for the same period, reflecting different survey methodologies.
- Freddie Mac Primary Mortgage Market Survey - The conforming mortgage rate benchmark. As of September 3, 2026, the 30-year fixed conforming rate averaged 6.71%. Comparing this to jumbo rates shows the premium jumbo borrowers currently pay (approximately 0.09 to 0.15 percentage points above conforming).