Jumbo Loan Calculator
Estimate payments for jumbo loans that exceed conforming loan limits. Compare your jumbo loan payment to what a conforming loan would cost and see the year-by-year amortization schedule.
A jumbo loan is any mortgage that exceeds the conforming loan limit set annually by the Federal Housing Finance Agency (FHFA). For 2025, the baseline conforming limit is $806,500 in most U.S. counties, with higher "high-cost area" limits up to $1,209,750 in places like the New York, San Francisco, and Los Angeles metros and in Hawaii. Any loan above that ceiling becomes a jumbo, also called a non-conforming loan, because Fannie Mae and Freddie Mac cannot buy or guarantee it.
The mechanics of a jumbo are otherwise similar to a conforming loan — same amortization math, same term options (15 or 30 years most common), same fixed-vs-adjustable choices. The differences are in pricing and underwriting. Jumbo rates are typically 0.25–0.5% higher than conforming rates (sometimes 0 to slightly lower in certain market conditions), down payment requirements are stricter (10–20% minimum, with sub-10% requiring specific programs), credit score requirements are higher (typically 700+ vs. 620+ for conforming), and lenders want to see substantial reserves (often 6–12 months of payments in liquid assets).
This calculator estimates the monthly payment, total interest, and amortization for a jumbo loan, and compares against the what a conforming loan would cost on the same purchase. Use it to understand the carrying cost of a high-balance loan, to test whether breaking the purchase into a smaller conforming loan plus larger down payment makes sense, or to plan around regional cost differences.
Inputs
Jumbo loans typically require 10-20% down
Jumbo rates are often 0.25-0.5% higher
2024 limit: $766,550 (higher in some areas)
Results
Monthly Payment
$5,189
Loan Amount
$800,000
Over Conforming Limit
$33,450
Total Interest
$1,067,963
Jumbo vs Conforming Payment
Loan Balance Over Time
Year-by-Year Breakdown
| Year | Start Balance | Principal | Interest | End Balance |
|---|---|---|---|---|
| 1 | $800,000.00 | $8,525.98 | $53,739.43 | $791,474.02 |
| 2 | $791,474.02 | $9,119.63 | $53,145.79 | $782,354.38 |
| 3 | $782,354.38 | $9,754.61 | $52,510.81 | $772,599.77 |
| 4 | $772,599.77 | $10,433.81 | $51,831.61 | $762,165.97 |
| 5 | $762,165.97 | $11,160.29 | $51,105.13 | $751,005.68 |
| 6 | $751,005.68 | $11,937.36 | $50,328.06 | $739,068.32 |
| 7 | $739,068.32 | $12,768.53 | $49,496.89 | $726,299.79 |
| 8 | $726,299.79 | $13,657.58 | $48,607.84 | $712,642.21 |
| 9 | $712,642.21 | $14,608.53 | $47,656.89 | $698,033.68 |
| 10 | $698,033.68 | $15,625.69 | $46,639.73 | $682,407.99 |
| 11 | $682,407.99 | $16,713.67 | $45,551.74 | $665,694.32 |
| 12 | $665,694.32 | $17,877.41 | $44,388.01 | $647,816.91 |
Formula
How to use this calculator
- Enter the home price you're targeting. Jumbo territory starts when the loan portion (after down payment) exceeds the conforming limit in your county.
- Enter the down payment percentage. Jumbo lenders typically require 10% minimum, 20% is standard. Higher down payments unlock better rates.
- Enter the expected jumbo interest rate. Get current quotes — jumbo rate variation across lenders is often 0.5%+ for the same borrower.
- Choose 15-year or 30-year term. Most jumbo purchases use 30-year, but 15-year saves substantial interest if the higher monthly payment fits the budget.
- Check the current conforming loan limit for your county. The default $766,550 is the 2024 baseline; 2025 limit is $806,500 in most counties, higher in high-cost areas. Look up your specific county at fhfa.gov.
- Review the projected monthly payment, total interest, and the gap above the conforming limit. The "Jumbo overflow" tells you how much of the loan would not qualify as conforming.
- If the overflow is small (under $50K–$100K), consider whether bumping the down payment to bring the loan back under the conforming limit could give access to better conforming rates.
- Pair the result with the mortgage-required-income calculator to confirm income qualifies — jumbo DTI thresholds are typically stricter (often 43% max with little flexibility).
Worked examples
Just over the conforming limit
$1,000,000 home, 20% down ($200K), 6.75% jumbo rate, 30-year fixed. Conforming limit: $806,500. Loan amount: $800,000 Just under the limit! By choosing this down payment, you may qualify for a CONFORMING loan at perhaps 6.25%, saving 0.5% on rate. Same loan at 6.25%: monthly P&I $4,927 (vs. $5,189 at 6.75%) = $262/mo savings. Lifetime interest saved: ~$94,000. Adjusting down payment to keep under the limit is often the highest-ROI decision in jumbo financing.
Well-into-jumbo high-end purchase
$1,800,000 home, 25% down ($450K), 7.0% jumbo rate, 30-year fixed. Loan amount: $1,350,000 Monthly P&I: $8,981 Annual P&I: $107,772 Lifetime interest: ~$1,883,000 Adding $1,000/mo in extra principal: payoff in ~24 years instead of 30, saving ~$430,000 in interest. Jumbo loans benefit enormously from voluntary extra principal payments because the absolute interest amounts are so large.
Comparing 15-year vs 30-year jumbo
$1,500,000 loan amount at 7.0% jumbo rate. 30-year: Monthly P&I $9,979. Lifetime interest: $2,092,000. 15-year: Monthly P&I $13,486 (at perhaps 6.5% — 15-year rates often slightly lower). Lifetime interest: $927,000. The 15-year is about $3,500/mo higher but saves $1,165,000 in lifetime interest. On a jumbo, the absolute dollars are striking. Buyers with sufficient income often choose 15-year specifically because the interest savings are so large.
When to use this calculator
Use this calculator when shopping for a high-value home in any market, but especially in high-cost-of-living metros where typical homes regularly exceed the conforming limit. The calculator is most useful for testing whether a small adjustment in down payment (or purchase price) could bring the loan under the conforming limit, unlocking better conforming rates.
For high-end buyers, the calculator helps compare two structural choices that matter more for jumbo than for conforming loans: (1) single jumbo loan vs. piggyback (conforming first + smaller second mortgage), and (2) jumbo fixed vs. jumbo ARM. Jumbo ARMs often have a wider rate spread vs. conforming ARMs, sometimes making jumbo ARMs particularly attractive for buyers who plan to refinance.
Pair this with the mortgage-payment calculator (for the underlying amortization math), the mortgage-required-income calculator (since jumbo DTI requirements are stricter), the down-payment calculator (to plan around the conforming threshold), and the mortgage-points calculator (jumbo discount points often have favorable economics due to large balances).
A practical reality: jumbo lenders are often portfolio lenders (banks that keep the loans on their own books rather than selling to Fannie/Freddie). This means more underwriting flexibility but also less rate competition. Talk to multiple jumbo lenders including local banks, credit unions, private banks (especially if you have significant assets), and online jumbo specialists. The rate spread across lenders for the same borrower can be enormous on jumbo loans.
The annual conforming limit changes typically take effect each January. If your purchase is timed around the new year, the upcoming limit may matter — sometimes a small delay tips a loan from jumbo to conforming.
Common mistakes to avoid
- Not shopping enough lenders. Jumbo rate variation across lenders is typically 0.5%+ for the same borrower. On a million-dollar loan, 0.5% is ~$115,000 of extra interest over 30 years. The rate-shopping effort pays off massively.
- Assuming jumbo requirements are uniform. Each lender sets their own underwriting overlay on jumbo loans — credit score floors, down payment minimums, reserve requirements, and DTI caps all vary significantly. Shop multiple lenders to find the best fit for your profile.
- Forgetting about reserves. Jumbo lenders often require 6–12 months of mortgage payments in liquid reserves after closing. A "house-poor" borrower with no reserves can be denied even with great income and credit.
- Treating jumbo and conforming rates as if they're always different in the same direction. In some markets, jumbo rates are slightly LOWER than conforming because portfolio lenders compete for the high-quality jumbo borrower. Always check current quotes, not historical assumptions.
- Underestimating the value of crossing back under the conforming limit. A $25,000 larger down payment to bring an $830K loan down to $800K (under the limit) can save tens of thousands in lifetime interest. Worth the math.
- Ignoring high-cost-area limits. The conforming limit is $806,500 in most counties but can be up to $1,209,750 in officially designated high-cost areas (NYC, SF, certain Hawaii counties). Loans up to the high-cost limit in those counties qualify as conforming despite exceeding the baseline.
Frequently Asked Questions
Sources & further reading
- Conforming Loan Limit Values — Federal Housing Finance Agency
- Mortgage Loans — consumer guide — U.S. Consumer Financial Protection Bureau
- Loan Estimate explainer — U.S. Consumer Financial Protection Bureau