When does a loan become jumbo?
A loan becomes jumbo when the loan amount exceeds your county's conforming loan limit. In 2026 that limit is $832,750 for one-unit homes in most counties and goes up to $1,249,125 in high-cost counties, per FHFA. There is no single national jumbo cutoff. The line where jumbo begins moves with the county you're buying in, because the conforming limit itself is higher in expensive housing markets.
That is the whole definition: at or under the limit, your loan is conforming and can be bought by Fannie Mae or Freddie Mac; above the limit, it's jumbo and non-conforming, so the investor sets the terms instead of the GSEs. You can see the current conforming figure on my conventional loan limits guide. What this page focuses on is the part that trips buyers up: the gap between the baseline limit and the high-cost ceiling, where a loan is large but still conforming.