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Jumbo vs. Conventional — California

Jumbo loan vs. conventional loan — what’s the difference?

The primary difference is loan size — but the implications run deeper. Here’s what California buyers need to know.

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The core difference: loan size

A conventional loan falls at or below the FHFA conforming limit — $832,750 for a single-unit property in many counties, and up to $1,249,125 in high-cost counties like Orange County (see /loan-limits/). A jumbo loan is any mortgage that exceeds the county limit. In most California markets, this threshold is reached quickly.

Side-by-side comparison

Feature Conventional loan Jumbo loan
Loan limit Up to the county conforming limit ($832,750 in many counties; up to $1,249,125 in high-cost counties) Above the county conforming limit
Backed by Fannie Mae / Freddie Mac Lender-specific guidelines
Minimum credit score 620–640 typical 660–700+ typical
Minimum down payment 3–5% on some programs 10–20% most common
Mortgage insurance Required below 20% down Never required
Documentation waivers Available via AUS Not allowed — full doc required
Reserve requirements Lower — often 2–6 months Higher — often 6–24 months

Key distinctions worth knowing

  • No PMI on jumbo — even below 20% down, mortgage insurance is never required
  • No documentation waivers — jumbo loans always require full income and asset documentation
  • Stricter reserve requirements — jumbo commonly requires 12–24 months post-closing
  • ARM restrictions — jumbo ARMs are not available above 80% LTV

In California, the choice between jumbo and conventional is usually made by the market. If your loan amount is above the county conforming limit, you’re in jumbo territory.

Serving California homebuyers and investors — Orange County, Los Angeles, San Diego, the Inland Empire, and communities throughout Southern California including Irvine, Huntington Beach, Anaheim, Fullerton, Garden Grove, and Santa Ana.

A worked example: the same home, two paths

This is an illustrative example, not a quote. A buyer in a county where the one-unit limit is the $832,750 baseline purchases at $1,000,000. With 20% down ($200,000), the loan is $800,000, which is under the limit and is a conventional loan. With 10% down ($100,000), the loan is $900,000, which is above the limit and would be jumbo. In that case, a modest change in down payment moves the loan from one category to the other, with different documentation, reserve and mortgage insurance rules. In a high-cost county with a limit near $1,249,125, the same $900,000 loan could still be conventional.

How to decide which side of the line you are on

  1. Look up your county’s limit for the unit count on the loan limits page.
  2. Subtract your planned down payment from the price to get your loan amount.
  3. If the loan is at or below the limit, price a conventional loan, including mortgage insurance if you put less than 20% down.
  4. If it is above the limit, price jumbo options and, where available, compare reducing the loan to the limit with a larger down payment.

Tradeoffs the table does not show

  • Cash upfront versus ongoing cost. Conventional loans can require less down but add mortgage insurance until you reach 80% LTV of the original value (it can be requested at that point and ends automatically at 78% if payments are current). Jumbo loans need more cash upfront but have no mortgage insurance.
  • Underwriting. Conventional loans can use automated underwriting, while jumbo files are underwritten to full documentation.
  • Flexibility on lower scores. Conventional loans generally start at a 620 minimum credit score.

Frequently asked questions

What is a high-balance conventional loan?

It is a conforming loan above the baseline limit but within the higher limit set for your county. It follows agency guidelines, so it is not a jumbo loan even though the amount is large.

Can I split the financing to stay under the limit?

Some buyers use a larger first loan and a smaller second loan. This depends on the program and your qualification for both, so ask us whether it fits your scenario.

Does the property type change the limit?

Yes. The limit rises with the number of units, as the jumbo basics page shows for 2-, 3- and 4-unit properties.

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