Jumbo Loan Calculator

The distinction between conforming and jumbo loans comes down to one number: the conforming loan limit set by the Federal Housing Finance Agency (FHFA). In 2024, this limit is $766,550 for most U.S. counties. In designated high-cost areas, the limit goes up to $1,149,825. Any mortgage above your county's limit is a jumbo loan. Conforming loans can be purchased by Fannie Mae and Freddie Mac, the government-sponsored enterprises that buy most residential mortgages from lenders. This secondary market provides liquidity and keeps rates low. Jumbo loans are too large for Fannie and Freddie to buy, so lenders either hold them on their own balance sheets (called portfolio lending) or sell them to private investors. Because jumbo loans stay on the lender's books, each lender sets its own underwriting standards. This creates more variation in requirements and pricing between lenders compared to conforming loans. One bank might require 15% down and a 720 score, while another accepts 10% down with a 700 score. Shopping around matters more with jumbo loans than with any other mortgage type.

Jumbo loan underwriting is stricter than conforming loan standards across every dimension: credit score, down payment, reserves, and debt-to-income ratio. Credit scores below 700 are rarely accepted. Most lenders price jumbo loans in tiers: 700-719, 720-739, and 740+. Each tier step up can save 0.125-0.25% on the rate. On a $960,000 loan, moving from the 700 tier to the 740 tier could save $100-$200 per month. Down payment requirements are higher because larger loans carry more risk for the lender. While 10% is sometimes available, 20% is the standard expectation. For loans above $2 million, 25-30% down is common. Reserve requirements are the most distinctive jumbo feature. Lenders want to see 6-12 months of total housing payments sitting in liquid accounts after closing. On a $7,000 monthly payment, that means $42,000-$84,000 in reserves beyond your down payment and closing costs. This requirement protects the lender by ensuring you can weather temporary income disruptions.

Jumbo loan pricing has an unusual dynamic. Conventional wisdom says jumbo rates should be higher because the loans are riskier for lenders. Historically, the jumbo premium was 0.25-0.75% above conforming rates. But in recent years, the spread has compressed, and at times jumbo rates have actually dipped below conforming rates. This inversion happens for several reasons. Jumbo borrowers are high-net-worth individuals with excellent credit, making them low-risk despite the large loan size. Banks compete aggressively for these customers because they often bring deposits, investment accounts, and business banking along with the mortgage. Some banks price jumbo loans as a loss leader to acquire affluent customers. Rate differences between lenders can be significant in the jumbo space. Unlike conforming loans where Fannie Mae pricing creates a relatively uniform market, jumbo lenders each run their own risk models. It is common to see a 0.375-0.50% spread between the best and worst offers on the same jumbo scenario. On a $960,000 loan, that spread represents $250-$330 per month. Getting quotes from at least 3-5 lenders is worth the effort.

Coming up with a large down payment on a million-dollar-plus property requires planning. On a $1.2 million home with 20% down, you need $240,000 in cash plus another $30,000-$50,000 for closing costs and reserves. Some buyers use proceeds from selling a current home. If you have $300,000 in equity from your current property, that covers the down payment. Bridge loans or HELOCs on the existing home can provide bridge financing if the timing does not line up perfectly. Piggyback structures split the purchase into two loans. A common setup is an 80/10/10: an 80% first mortgage (conforming or jumbo depending on the amount), a 10% second mortgage (HELOC or home equity loan), and 10% cash down. This avoids PMI on the first mortgage and reduces the amount at the jumbo rate. The second mortgage typically carries a higher rate but is on a smaller balance. Some borrowers with large stock portfolios use a securities-backed line of credit (SBLOC) for part of the down payment, borrowing against their investment portfolio at relatively low rates. This preserves the invested capital while providing liquidity for the purchase. The risk is a margin call if the portfolio value drops significantly.

Jumbo loans are available for investment properties and second homes, though with tighter requirements than primary residence purchases. For investment properties, expect to put 25-30% down with a minimum credit score of 720. Interest rates are typically 0.375-0.75% higher than primary residence rates. Rental income from the property can help you qualify, but lenders discount it. Most use 75% of the documented rental income to account for vacancies and maintenance. If the property rents for $4,000 per month, the lender counts $3,000 toward qualifying income. Second homes (vacation properties) have requirements between primary residences and investment properties. Down payments of 15-20% are typical, and rates are 0.125-0.375% above primary residence rates. The property must be in a location that makes sense as a vacation home (not next door to your primary residence). For borrowers purchasing in high-cost resort or vacation markets, jumbo financing is often the only option because property values exceed conforming limits. Ski towns, beach communities, and urban vacation destinations frequently require jumbo loans for even modestly sized homes. Lenders with experience in these markets may offer better terms than national banks unfamiliar with the local real estate dynamics.