By Eli Sanderlin · April 25, 2026 · 9 min read

Jumbo Loans in the Florida Keys: 2026 Limits, Rates, and Underwriting

In 2026, jumbo lending in Monroe County is in an interesting spot — for strong borrowers, jumbo rates often beat conforming. Here's the playbook.

2026 Monroe County conforming & jumbo limits

1-unit: $1,209,750
2-unit: $1,548,975
3-unit: $1,872,225
4-unit: $2,326,875

Anything above is jumbo. Standard FL counties (non-high-cost) cap at $806,500 for 1-unit.

The three jumbo flavors I write

Standard agency jumbo

Full-doc, 720+ FICO, 20%+ down, 12 months reserves. Best pricing for clean borrowers. Loans up to $3M typical, $5M with strong file.

Asset-depletion jumbo

Use 60–70% of liquid assets / 360 months as qualifying income. For retirees or HNW borrowers with brokerage wealth but limited W-2. I close these regularly in Naples and the Upper Keys.

Portfolio jumbo

Held by the lender, not securitized. Flexible on: non-warrantable condo, recent BK, recent foreclosure, foreign income, unusual property type. Rate slightly higher (~0.25–0.50%) but the only path for many Keys deals.

When jumbo beats conforming

720+ FICO: jumbo often 0.125–0.375% lower than conforming.
700–719 FICO: roughly equal.
Below 700: conforming wins.

Why? Portfolio jumbo lenders compete aggressively for high-quality high-balance loans. They're willing to undercut the agency rate to win the borrower.

Reserve requirements (the silent qualifier)

Most jumbo lenders want 6–12 months of total housing payment in reserves AFTER closing. For a $2M Keys deal at 6.0% / 30yr / 20% down with $14k/yr insurance and $20k/yr tax:

Monthly PITI ≈ $12,500
12 months reserves required ≈ $150,000
This is on TOP of the 20% down payment ($400k) and closing costs (~$45k).

Total cash needed at closing on this deal: roughly $595k. Plan accordingly.

Common jumbo Keys mistakes

Going with the bank you have a checking account at instead of shopping. National banks rarely have the best jumbo rates.
Not getting insurance quoted upfront — same trap as smaller deals, but the dollar amounts are bigger.
Forgetting that jumbo underwriting is more conservative on income — RSU vesting, 1099 income, and recent job changes get scrutinized.
Submitting the file before the condo questionnaire is reviewed (if applicable) — non-warrantable surprises kill jumbos.

Run Jumbo Qualifier Book a Jumbo Call