Super Jumbo DSCR Loans In Key Largo — The Quick Read: Investors buying multi-million-dollar rental property in Key Largo can size financing through select lenders in Lendmire’s wholesale network from $150,000 up to $10,000,000, qualifying primarily on the property’s rental income rather than traditional personal-income documentation. Leverage steps down as the loan balance climbs, coverage below 1.00 has a real path through select programs, and Monroe County’s rental rules directly shape what rent an appraiser can actually credit. The mechanics below walk through how that math works, where it breaks, and what an investor decision actually looks like.
What Counts As “Super Jumbo” in the First Place?
There’s no federal agency that defines super jumbo. Rate assumptions belong in the calculator, and the article should discuss coverage qualitatively. Once a loan crosses that ceiling, it’s jumbo. Once it clears roughly $3 million, most of the market starts calling it super jumbo, though the exact cutoff varies lender to lender.
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Rate source: Freddie Mac 30-yr average via FRED® — Federal Reserve Bank of St. Louis · effective Sep 17, 2026
Prefilled with local estimates — enter your own rent or nightly figures, taxes, insurance, and HOA for a more accurate picture.
Program parameters update from Lendmire’s centralized guideline source. Taxes and insurance are editable estimates.
As of Sep 17, 2026 · General Freddie Mac market benchmark, not a Lendmire loan offer. Rent, nightly rate, occupancy, taxes, and insurance are editable estimates. Short-term rental figures are estimates only and vary significantly by season, property type, management approach, and local short-term-rental rules — confirm local regulations before relying on them. Qualifying income for short-term rentals varies by program — some use appraisal market rent, others use documented STR history or projections — and is confirmed in underwriting. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
None of that matters much for a DSCR investor, though, and here’s why: DSCR loans are business-purpose, non-agency products from the start. So the conforming-limit conversation is background, not the rulebook. The rulebook is whatever the property’s rent produces against the payment — and whatever leverage and reserve tier the loan size lands in.
Key Terms Defined
DSCR (debt-service coverage ratio): the property’s monthly rent divided by its full monthly housing payment — principal, interest, taxes, insurance, and any HOA dues. A ratio at or above 1.00 means the rent covers the payment.
No-ratio loan: a select-program path where the lender doesn’t require a minimum DSCR figure at all, typically paired with reduced leverage and a stronger overall file, subject to underwriting.
PITIA: the acronym for the full monthly obligation used in the DSCR denominator — principal, interest, taxes, insurance, and association dues.
Two-appraisal requirement: above certain loan sizes, lenders often order two independent valuations rather than one, because high-value or unusual properties are harder to comp accurately.
Form 1007: Fannie Mae’s Single-Family Comparable Rent Schedule, the standard appraisal format used across the industry — including most non-QM files — to document a property’s market rent.
How the Underwriting Actually Works, Step by Step
The property’s rent, not the borrower’s W-2, is the first number that matters. An appraiser establishes market rent using the Form 1007 rent schedule convention for a single unit — a format built to give a consistent, monthly-basis rent opinion regardless of whether the loan is agency-eligible.
That monthly rent figure gets divided by the full payment — principal, interest, taxes, insurance, and any dues — to produce the coverage ratio. Clear 1.00x and the file qualifies for full leverage on most programs in the network. Land between 0.75x and 0.99x, and there’s still a real path forward through select lenders, though LTV and terms adjust to compensate, subject to underwriting. No-ratio options also exist through select wholesale programs up to $2,000,000 for borrowers with a seven-year clean housing history, but that path never publishes a minimum ratio and always carries its own credit and reserve conditions, subject to underwriting.
Loan size then determines how much scrutiny the file gets — and this cuts against a common assumption. Bigger balances don’t loosen underwriting; they tighten it. Above $2,000,000, expect two independent appraisals rather than one, because comparable sales at that price point are thinner and harder to defend on a single opinion of value. Above $3,000,000, the credit floor rises to 700 with additional seasoning requirements. Above $4,000,000, every file gets reviewed case by case before it’s even submitted, and cash-out disappears entirely at that tier.
Reserves round out the picture: most files need six months of PITIA sitting in reserve on the subject property (interest, taxes, insurance, and dues only if the loan is interest-only), climbing to twelve months for first-time investors. Reserves on other financed properties in the portfolio generally aren’t required on top of that — a detail worth knowing if the investor already holds several other rentals.
The Leverage Ladder — What Actually Moves With Loan Size
Leverage isn’t flat across the super jumbo range. It steps down in stages as the balance grows, and cash-out compresses faster than purchase or rate-and-term.
| Loan Amount | Purchase / Rate-Term LTV | Cash-Out LTV | Credit Floor |
|---|---|---|---|
| $150K–$1M | 80% | 75% (standard) / 70% (STR collateral) | 660+ |
| $1M–$1.5M | 75% | 70% | 700+ |
| $1.5M–$2M | 75% | 60% | 720+ |
| $2M–$3M | 75% | 60% | 720+ |
| $3M–$4M | 65% | None | 700+ |
| $4M–$10M | 60% (on review) | None | 700+ |
Above $4,000,000, that 60% figure is never a flat “up to” number — every request in that range goes through case-by-case review before submission, purchase or rate-and-term only. Cash-out stops entirely above $3,000,000, and it’s capped at $1,500,000 in proceeds above the 60% LTV breakpoint even below that. None of this is a promise of approval; every parameter here is subject to underwriting and lender guidelines, and terms can shift file to file. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
Interest-only structuring is available too. It runs up to 120 months on 30- and 40-year terms, capped at 75% LTV. It requires coverage of 0.75x or better, since the ratio is measured against interest, taxes, insurance, and dues only — not the full principal-and-interest payment. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.
Where Key Largo Breaks the General Rule
Here’s the part a national DSCR explainer won’t tell an investor — and it’s the biggest local wrinkle in the whole file. Monroe County, which covers unincorporated Key Largo, enforces a 28-day minimum rental rule. Under the county’s Special Vacation Rental Program, renting a dwelling for less than 28 days is unlawful in most zoning districts unless that specific property holds a permit or a documented exemption. Legal short-term rental status at the parcel level is rare. County code-compliance data referenced in local coverage of a Monroe County commission discussion puts the count at roughly 1,287 units holding exemptions, mostly inside gated or multi-unit complexes. Compare that to just 109 annual permits issued for single-family homes.
That matters directly for the DSCR numerator. On the network’s short-term-rental program, income gets credited from twelve months of documented operating history on a refinance or the appraisal’s short-term-rent analysis on a purchase, discounted to 80% of gross — but that whole path only applies where the specific parcel is legally permitted to operate as a nightly rental in the first place. Municipal permission has to be documented property by property; it’s never assumed for a city, a zoning district, or a county, and that’s true everywhere the network lends, not just in the Keys. Short-term rental rules can vary by city, county, HOA, and property type, so investors should confirm local rules before relying on projected nightly income.
For most Key Largo single-family purchases, the appraiser and underwriter work from a monthly market rent comparable set, not an Airbnb-style nightly projection. The Form 1007 convention already assumes a monthly basis, so this isn’t a documentation problem — it’s an income-ceiling problem. Say an investor prices a deal off nightly listing averages, then finds the file underwritten to a long-term monthly lease comparable. In that case, a projected 1.3x coverage ratio can collapse toward or below 1.00x before the loan amount is even discussed.
Flood and Wind Insurance Move the Denominator, Not Just the Sticker Price
Insurance in Monroe County isn’t a small line item in the DSCR math. It’s often the factor that decides whether the deal clears coverage at all. Monroe County has one of the highest concentrations of National Flood Insurance Program policyholders of any Florida county. Wind coverage runs through the state’s insurer of last resort, at rates the county’s own materials describe as substantially above the median coastal rate elsewhere in Florida. PITIA is the denominator in the coverage ratio, so a property with heavier insurance costs needs proportionally more rent to hit the same DSCR number as a comparable inland property. That’s true even before you factor in flood zone, elevation, or replacement cost differences.
None of this changes the leverage ladder or the credit floors above; it changes what rent is required to clear a given coverage target on a specific Key Largo parcel. That’s a property-level calculation, not a program parameter, and it’s worth running before an investor gets attached to a purchase price.
A Worked Example (Modeled Numbers, Not a Quote)
Picture an investor evaluating a Key Largo canal-front property listed at $2,400,000, planning a purchase at 75% LTV under the standard program tier for that balance. Assume — purely as a modeling exercise — that documented long-term monthly rent comps support a rent figure that produces a coverage ratio around 1.10x against the full PITIA payment, including the higher flood and wind premiums typical of the area. At 1.10x, that clears the 1.00x threshold most programs use for full leverage at this loan size, though credit at 720+ and two independent appraisals would apply given the balance sits above $2,000,000.
Suppose the same investor assumed nightly Airbnb-style income without first confirming the parcel holds a valid vacation rental exemption or permit. If that income turns out not to be legally usable on that specific property, the file falls back to the monthly rent comparable. That could easily push the ratio below 1.00x. This isn’t a hypothetical edge case in Key Largo. Given the exemption math above, it’s closer to the default outcome for an unverified property.
DSCR vs. conventional financing
Two common ways to finance an investment property in this market. They qualify you differently — here’s how investors weigh them.
Why investors choose it
- Qualifies on the property’s rental income — no personal tax returns, W-2s, or pay stubs needed to document income.
- No personal debt-to-income ceiling to clear, so existing mortgages and obligations don’t cap your borrowing the same way.
- Can be closed in an LLC, keeping the property inside a business entity.
- Built for scaling — not held to the limit on number of financed properties that conventional financing applies.
- Underwriting centers on the deal: generally qualifies when the rent covers the payment, a 1.00x coverage ratio being a common baseline (confirmed in underwriting).
- Designed specifically for investment property, including long-term and, where the program allows, short-term rentals.
Where it’s strong
- Often the lowest ongoing financing cost for a buyer who fully qualifies on personal income — a fit for a first property or a cost-first purchase.
Trade-offs for investors
- Requires full personal income documentation and must fit within a debt-to-income limit — salary, existing debts, and other mortgages all count.
- Typically held in your personal name rather than a business entity.
- Caps how many financed properties you can carry, which can become a ceiling as a portfolio grows.
- Evaluates you as a borrower as much as the property, which usually means more paperwork.
How investors usually choose: a first or single property often optimizes for the lowest financing cost; portfolio builders often optimize for leverage, vesting in an LLC, and scaling past conventional caps. The right answer depends on your goals, the property, and current guidelines — both paths run through select lenders in Lendmire’s wholesale network, with eligibility and terms confirmed in underwriting.
Look across files like this one, and you’ll see the same pattern in the network. Waterfront and canal-front Key Largo purchases with clean, permitted rental status and conservative rent comps clear coverage comfortably at standard leverage. Files built on unverified nightly-rate assumptions run into trouble much sooner. The problem shows up right at the appraisal stage — long before credit or reserves even come into play.
DSCR vs. Traditional Jumbo — When Each Makes Sense
A traditional jumbo mortgage still works for an investor who wants a second home or plans to occupy part of the property. That’s because jumbo underwriting looks at personal income and credit, not the asset’s rent. DSCR financing through Lendmire’s complete DSCR loans guide fits the pure rental scenario better. Qualification runs mainly on whether the property’s rental income covers the payment, subject to lender guidelines. This helps investors whose traditional income documents don’t reflect a deal’s real cash flow — self-employed buyers, people with heavy write-offs, or anyone who already holds several properties.
Entity ownership adds another layer worth flagging for high-value files. Investors titling a Key Largo property in an LLC should review whether an LLC can hold a super jumbo DSCR loan, since vesting rules and documentation requirements shift once an entity is on title, subject to lender program eligibility.
What Investors Should Do Before Making an Offer
Confirm the parcel’s rental status before assuming any income type. Pull the property’s zoning district and check whether it carries a documented vacation rental exemption or permit — not a general assumption about “the Keys” being STR-friendly. Get a real insurance quote for flood and wind coverage before locking in a purchase price, since that number moves the DSCR denominator more than almost anything else on a coastal file. And size the loan against the ladder above realistically: a $2.5 million purchase sits in a different leverage and credit tier than a $900,000 one, and the difference isn’t cosmetic.
DSCR loans are designed for non-owner-occupied investment properties. Because they’re business-purpose investor loans, they get reviewed differently than a standard owner-occupied mortgage. Tax treatment can depend on how the funds are used and how the property is held. Investors should keep clear records and talk to a qualified tax professional before relying on any deduction.
Frequently Asked Questions
Can I use Airbnb-style nightly rates to qualify a Key Largo property?
Only if that specific parcel is legally permitted to operate as a short-term rental under Monroe County’s rules, and only through the network’s dedicated short-term-rental program, which credits income at 80% of documented operating history or the appraisal’s short-term-rent analysis. Absent that documented permission, the file gets underwritten to monthly rent comparables instead — a materially different and usually lower number.
Does a bigger loan mean easier approval since the lender wants the deal more?
No — it’s the opposite pattern in practice. Loan amounts above $2,000,000 generally trigger two appraisals instead of one, and above $3,000,000 the credit floor rises to 700 with added seasoning requirements, so larger balances bring more scrutiny, not less.
What happens if the property’s coverage ratio comes in below 1.00x?
There’s still a real path through select lenders in the network for ratios between roughly 0.75x and 0.99x, though leverage and terms adjust to compensate, subject to underwriting. A no-ratio structure is also available through select programs up to $2,000,000 for well-qualified borrowers with a clean, lengthy housing history, though it never publishes a minimum ratio and comes with its own credit and reserve conditions.
Is cash-out refinancing available on a super jumbo Key Largo property?
Cash-out is available up to $3,000,000 in loan amount, with proceeds unlimited at or below 60% LTV and capped at $1,500,000 above that threshold; cash-out disappears entirely above $3,000,000 and isn’t available for credit scores at or below 680 on loans above $1,500,000. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.
Can I hold the property in an LLC and still qualify?
Entity vesting is generally welcome across the program tiers, subject to lender program eligibility and underwriting review — investors should review the specific considerations that come with entity-titled super jumbo files before assuming standard individual-borrower terms apply.
If you’re evaluating a Key Largo purchase or refinance and want to see how the coverage math, leverage tier, and reserve requirements actually line up for a specific property, Lendmire can help compare DSCR loan options based on the property’s income, credit profile, and investor goals. Reach the team at 828-256-2183 or request a quote directly. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.
For current guidelines and terms, see Lendmire’s super jumbo DSCR loan programs page.
Self-employed borrowers can compare both super jumbo programs on Lendmire’s self-employed mortgages page.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage focused on DSCR investor financing, helping arrange programs through wholesale and investor-lending channels in 40 markets, including Washington, D.C. DSCR loans are evaluated by the lender on property cash flow rather than personal income, subject to lender guidelines, supporting LLC closings and accommodating investors with four or more financed properties. Scotsman Guide Top Mortgage Workplace in both 2025 and 2026.
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References
1. Fannie Mae: Single-Family Comparable Rent Schedule (Form 1007)
2. Monroe County FL: Special Vacation Rental Program
3. Monroe County Code Compliance vacation rental violations coverage
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.
