# Jumbo Loan Calculator Check a loan against the 2026 conforming limits, price the payment and reserves, and compare ways to stay conforming. --- - **Canonical URL:** https://dothecalculation.com/calculators/jumbo-loan-calculator - **Category:** Real Estate & Property - **Publisher:** Do The Calculation (https://dothecalculation.com) - **Cost:** Free, no account or sign-up required - **Privacy:** Runs entirely in the browser; inputs are never sent to a server - **Methodology:** https://dothecalculation.com/methodology --- ## Is This a Jumbo Loan, and What Does It Cost? Check a loan against the 2026 conforming limits, price the payment and reserves, and compare the two ways of staying conforming: a bigger down payment, or a conforming first plus a second. - 2026 FHFA limits built in — $832,750 baseline, $1,249,125 high-cost ceiling - Reserves and debt-to-income, the constraints jumbo underwriting cares about - Prices the jumbo rate spread separately from the loan size ## Quick Answer — What Makes a Loan Jumbo in 2026? A loan is jumbo when it exceeds the conforming loan limit for its county. The Federal Housing Finance Agency set the **2026 baseline at $832,750** for a one-unit property, with a **high-cost ceiling of $1,249,125** — exactly 150 percent of the baseline, and the figure that also applies in Alaska and Hawaii. Above that limit the loan sits outside Fannie Mae and Freddie Mac guidelines, so the lender holds it and sets its own terms. **A $1,150,000 purchase with 20 percent down, on the baseline limit, at a 6.75 percent jumbo rate against a 6.55 percent conforming rate, 30-year term, $13,800 of annual property tax and $3,200 of insurance, on a $360,000 income with $900 of other debts:** • Loan amount — **$920,000**, which is **$87,250** above the limit • Principal and interest — **$5,967.10**; total monthly payment — **$7,383.77** • Housing ratio — **24.6 percent**; total debt ratio — **27.6 percent** • Reserves required at six months — **$44,303** • Cost of the 0.20 point rate spread — **$121.79** a month, **$43,845** over thirty years The reserve requirement is the part borrowers underestimate. Forty-four thousand dollars has to still be in accounts after closing, on top of the down payment and closing costs. ## How to Use This Calculator: A $1.15 Million Purchase Set the **county conforming limit** first, and look it up rather than assuming. High-cost counties carry limits above the $832,750 baseline all the way to the $1,249,125 ceiling, so the same loan can be jumbo in one metro and conforming in the next one over. Enter the **price and down payment**. At $1,150,000 with 20 percent down, the loan is **$920,000** — **$87,250** past the baseline limit, and therefore jumbo. Enter both **rates**. The calculator applies the jumbo rate because the loan qualifies as one, and it separately prices what the spread costs: at 0.20 points, **$121.79** a month and **$43,845** across the full term. That is a real number and it is smaller than most people expect. Add **taxes, insurance and any HOA dues**. Property tax at $13,800 and insurance at $3,200 bring the total monthly payment to **$7,383.77** against $5,967.10 of principal and interest — taxes and insurance are 19 percent of the payment. Enter **income, other debts and the reserve requirement**. A back-end ratio of **27.6 percent** is comfortably inside typical jumbo guidelines, and six months of reserves is **$44,303**. Then read the two escape routes. **$87,250** of extra cash brings the loan exactly to the limit. Alternatively a **$832,750** conforming first plus an **$87,250** second at 8.05 percent gives a combined payment of **$5,934.21** — **$32.89 a month cheaper** than the jumbo, with no extra cash required. ## The Formulas This Calculator Uses **Loan amount** = Home price × (1 − Down payment %). It is **jumbo** when that exceeds the county conforming limit. **Monthly principal and interest** = \(L \times \frac{r}{1 - (1 + r)^{-n}}\), where \(r\) is the monthly rate and \(n\) the number of payments. **Total monthly payment** = Principal and interest + Annual tax ÷ 12 + Annual insurance ÷ 12 + HOA. **Front-end DTI** = Total monthly payment ÷ Monthly income. **Back-end DTI** adds other monthly debts. **Reserves required** = Total monthly payment × Months required. **Down payment needed to stay conforming** = Home price − County limit. **Combo route** = a first lien at the conforming limit plus a second lien for the excess, priced 1.5 points above the conforming rate. **Rate spread cost** = the difference between the payment at the jumbo rate and the payment at the conforming rate on the same loan amount, isolating the price of the label from the price of the loan size. ## A Second Example: A High-Cost County at $2.4 Million Take a **$2,400,000** purchase in a high-cost county with the **$1,249,125** ceiling, 30 percent down, a 6.90 percent jumbo rate, $28,800 of annual property tax, $7,200 of insurance and $350 a month of HOA dues, on a $750,000 income with $1,800 of other debts and a twelve-month reserve requirement. The loan is **$1,680,000** — **$430,875** above even the high-cost ceiling. Principal and interest are **$11,064.48** and the total monthly payment is **$14,414.48**. The back-end debt ratio is **25.9 percent**, comfortable on income. Reserves at twelve months are **$172,974**. On a purchase already requiring $720,000 of down payment, that is a further $173,000 that has to remain liquid after closing — and at this size lenders commonly ask for twelve months rather than six. The rate spread here costs **$390.44** a month and **$140,557** over thirty years, because a 0.35 point spread on a $1.68 million loan is a much larger number than 0.20 points on $920,000. The combo route is worth **$48.60 a month more** than the jumbo at these rates, so it does not help. That flips easily: whether a conforming-plus-second structure beats a single jumbo depends on the second lien rate, and it is worth pricing both rather than assuming either. For the conforming comparison, the [mortgage calculator](/calculators/mortgage-calculator) runs the standard case with full amortisation, and the [home affordability calculator](/calculators/home-affordability-calculator) works backwards from income to a supportable price. ## How Jumbo Underwriting Differs, and Where the Real Costs Are **The rate spread is smaller than its reputation.** Jumbo borrowers are a low-risk population and lenders keep these loans on their own balance sheets, so the premium over a conforming rate is often a fraction of a point — and in some periods jumbo rates have sat below conforming rates outright. On a $920,000 loan a 0.20 point spread costs $121.79 a month. **Reserves are the requirement that catches people out.** Six to twelve months of the full monthly payment, in accounts, after closing. On the first example that is $44,303 and on the second $172,974, and it is required in addition to the down payment and closing costs rather than instead of any of it. **Documentation is heavier.** Full income and asset verification, often two years of tax returns, and more scrutiny of the source of the down payment. Self-employed borrowers find this the most demanding part, well ahead of the rate. **Guidelines are set by the lender, not by an agency.** Because these loans are portfolio products rather than agency-conforming, credit score floors, reserve requirements, maximum loan-to-value and debt-to-income limits vary between lenders far more than on a conforming loan. Shopping three lenders on a jumbo changes the answer much more than it does on a conforming loan. **Debt-to-income is usually the binding constraint.** Most jumbo lenders want a back-end ratio at or under 43 percent, and a borrower with substantial other debt can be declined on a loan whose payment they could comfortably afford. The [loan-to-value calculator](/calculators/loan-to-value-calculator) covers the other ratio underwriting looks hardest at. ## Limitations Conforming limits are set per county and per unit count. This calculator carries the 2026 one-unit baseline and high-cost ceiling, and lets you enter your own county figure, but limits for two, three and four-unit properties are higher and are not built in. The combo comparison prices the second lien at 1.5 points above the conforming rate as a working assumption. Real second-lien pricing varies enormously with loan-to-value, credit score and whether it is a fixed second or a home equity line, and a real quote can move that comparison either way. Mortgage insurance is not modelled. Most jumbo loans require 20 percent down or more and therefore avoid it, but low-down-payment jumbo products exist and carry their own insurance or rate adjustments. Adjustable-rate jumbo products are common and are not modelled here, which prices a fixed-rate loan for its whole term. A jumbo adjustable can start well below the fixed rate, and the comparison depends on how long you expect to hold the loan. Rates in this calculator are inputs, not quotes. Jumbo pricing varies more between lenders than conforming pricing does, which is exactly why the calculator asks for both rates rather than assuming a spread. ## Related Calculators For the conforming case and full amortisation, the [mortgage calculator](/calculators/mortgage-calculator) is the direct comparison. The [home affordability calculator](/calculators/home-affordability-calculator) works backwards from income, debts and down payment to a price range, which is the right starting point when the question is how much house rather than which loan. The [loan-to-value calculator](/calculators/loan-to-value-calculator) covers the ratio jumbo underwriting scrutinises hardest after credit score, and the [closing cost estimator](/calculators/closing-cost-estimator) totals the cash needed at the table — which on a jumbo purchase sits alongside a reserve requirement that has to survive it. Large loans are also where interest-only structures appear most often, and the [interest-only mortgage calculator](/calculators/interest-only-mortgage-calculator) shows what the payment jump looks like when the interest-only period ends. ## Frequently asked questions ### What is the jumbo loan limit for 2026? The Federal Housing Finance Agency set the 2026 baseline conforming loan limit at $832,750 for a one-unit property, with a high-cost area ceiling of $1,249,125 — 150 percent of the baseline, which also applies in Alaska and Hawaii. Any loan above the limit for its county is a jumbo loan. ### Are jumbo mortgage rates higher than conforming rates? Usually by a fraction of a point, and sometimes not at all — in some periods jumbo rates have sat below conforming ones. On a $920,000 loan, a 0.20 point spread costs $121.79 a month and $43,845 over thirty years. The tighter underwriting matters more than the rate. ### How much do I need in reserves for a jumbo loan? Commonly six to twelve months of the full monthly payment, held in accounts after closing. On a $7,383.77 payment that is $44,303 at six months; on a $14,414.48 payment at twelve months it is $172,974. That is required on top of the down payment and closing costs, not instead of them. ### How do I avoid a jumbo loan? Two ways. Put down enough to bring the loan to the county limit — $87,250 of extra cash on the worked example. Or split it into a conforming first lien at the limit plus a second covering the excess, which needs no extra cash and in that example is $32.89 a month cheaper than the jumbo. ### Is a conforming first plus a second better than a jumbo? It depends entirely on the second lien rate. On the $1.15 million example the combo is $32.89 a month cheaper; on the $2.4 million example it is $48.60 a month more expensive. Price both with real quotes, and weigh the convenience of one loan against two sets of terms. ### What credit score do I need for a jumbo loan? Higher than for a conforming loan, and set by the individual lender rather than by an agency. Because these are portfolio products, credit floors, reserve requirements and maximum loan-to-value vary far more between lenders than on conforming loans — which is why shopping three lenders matters much more here. ### What debt-to-income ratio do jumbo lenders require? Most want a back-end ratio at or under 43 percent, though individual lenders vary. The worked example comes in at 27.6 percent on a $360,000 income, which is comfortable. Debt-to-income is usually the binding constraint rather than the loan size itself. ### Do conforming limits vary by county? Yes. Where 115 percent of the local median home value exceeds the baseline, the limit rises with the area median, capped at the $1,249,125 ceiling. The same loan can be jumbo in one metro and conforming in the next one over, so look up the county figure rather than working from the baseline. ## Related concepts - **Conforming Loan Limit** — The maximum loan Fannie Mae and Freddie Mac will buy. $832,750 for a one-unit property in 2026, rising to $1,249,125 in high-cost counties. - **Reserve Requirement** — Months of full mortgage payment that must remain in accounts after closing. Six to twelve months is typical on jumbo, on top of down payment and closing costs. - **Piggyback Combo** — A conforming first lien at the limit plus a second covering the excess. Avoids jumbo underwriting without extra cash, at the cost of two loans and two sets of terms. ## Related guides - [Mortgage Guide: Payment Formula, Costs, and PMI](https://dothecalculation.com/blog/finance/mortgage-guide) — Understand how mortgage payments work, what the DTC mortgage calculator includes, and how taxes, insurance, PMI, and loan term affect cost. - [Home Affordability: Budget, Formula, and Calculator](https://dothecalculation.com/blog/finance/home-affordability-analysis) — Estimate a home-price range from income, debt, down payment, rate, taxes, and insurance, then test costs the DTC model does not include. ## Related calculators - [Biweekly Mortgage Payment & Payoff Accelerator](https://dothecalculation.com/calculators/biweekly-mortgage-payoff-calculator) — Compare biweekly versus monthly mortgage payment schedules to calculate how much faster you pay off your loan and total interest saved. - [Second Mortgage Calculator](https://dothecalculation.com/calculators/second-mortgage-calculator) — Borrowing capacity against a combined loan-to-value ceiling, the payment, and the blended rate across both liens. - [Construction Loan Calculator](https://dothecalculation.com/calculators/construction-loan-calculator) — Interest on the drawn balance month by month, the interest reserve, and the permanent payment after conversion. - [Down Payment Assistance Savings Calculator](https://dothecalculation.com/calculators/down-payment-assistance-savings-calculator) — Value a grant, forgivable, deferred or repayable second against mortgage insurance saved and years of saving avoided. - [FHA/VA Loan Affordability Calculator](https://dothecalculation.com/calculators/fha-va-loan-affordability-calculator) — Maximum price under FHA rules with MIP or VA rules with a funding fee, solved from a debt-to-income limit. - [Home Staging Cost & ROI Calculator](https://dothecalculation.com/calculators/home-staging-roi-calculator) — Price a staging budget against the price lift and the carrying costs saved by a faster sale. --- _The 2026 conforming loan limit values are the figures announced by the Federal Housing Finance Agency: an $832,750 baseline for one-unit properties and a $1,249,125 high-cost ceiling at 150 percent of the baseline. Limits for two, three and four-unit properties are higher and are not built in. Rates here are inputs rather than quotes, and jumbo pricing varies between lenders far more than conforming pricing does — which is why the calculator asks for both rates instead of assuming a spread. The combo comparison prices a second lien at 1.5 points above the conforming rate as a working assumption; real second-lien quotes can move that comparison either way. Adjustable-rate jumbo products and low-down-payment jumbo mortgage insurance are not modelled._ --- _Source: [Do The Calculation](https://dothecalculation.com/calculators/jumbo-loan-calculator). Quote freely with attribution and a link to this page._