Financing a Flagstaff Short-Term Rental: Your Loan Options in 2026

How do you finance a short-term rental in Flagstaff?
There are three main paths: a conventional investment property loan (as little as 15% down on a single-family home), a DSCR loan that qualifies on the property's expected income (usually 20% to 25% down for STRs), or a second home loan (as little as 10% down) if the home is truly a second home you'll use and control. Second home loans come with real limits on renting, so the loan has to match how you'll actually use the home.

Lending guidelines last verified September 2026

Financing is one of the places we see STR purchases get tangled up most, and it's rarely because a buyer can't get a loan. It's usually because the loan doesn't fit what they want to do with the house. That can mean a denial late in escrow, a cash crunch at closing, or worse, a loan that was never meant for a rental.

We own and run two short-term rentals in the Phoenix area, and we own a rental home here in Flagstaff that we lease to Capstone Homes as one of their model homes. We've also helped dozens of Flagstaff clients run the numbers on investment properties and STRs, buy them, and coach them on optimal self-management (so they can maximize profit). We're not lenders, so this guide is about asking the right questions of one before you write an offer.

This is part of our complete Flagstaff short-term rental guide.

The main options at a glance

Sources: Fannie Mae Eligibility Matrix (August 2026) and Selling Guide; DSCR figures are examples from individual lenders and vary widely.

Second home loans, and their strings

A second home loan is the most attractive on paper, with the lowest down payment of the three. It's also the one we see misunderstood most often. Here's what Fannie Mae's guidelines say a second home has to be:

• Occupied by you for some portion of the year.
• A one-unit home suitable for year-round use.
• Under your exclusive control.
• Not a rental property or a timeshare arrangement.
• Not subject to any agreement that gives a management firm control over occupancy. That rules out a typical full-service STR management contract.

Rental income can't be used to qualify, either. If a lender sees rental income from the property, the loan can still be a second home loan only if that income isn't used for qualifying and every other second-home rule is met.

Where a second home loan can fit is the buyer who really wants a Flagstaff getaway, will use it often, keeps control of the calendar, and may rent it occasionally. Every lender reads these rules a little differently, so get your lender's answer in writing before you commit to a plan.

Conventional investment property loans

Fannie Mae defines an investment property simply: "owned but not occupied by the borrower." For a single-family home, the maximum loan-to-value on a purchase is 85%, so 15% down. For two to four units, it's 75%, so 25% down.

Investment loans also carry loan-level price adjustments, which add to the cost of the loan. Reserves start at six months of the payment, and if you own other financed properties, Fannie adds reserves of 2% to 6% of their combined loan balances.

On refinances, the limits drop to 75% for a limited cash-out refinance, and 75% (one unit) or 70% (two to four units) for a cash-out refinance, per Fannie's December 2025 matrix.

Fannie Mae's new STR income rules

This is brand new, and most articles online haven't caught up. In September 2026, Fannie Mae published a dedicated short-term rental section of its Selling Guide, B3-3.8-03. Lenders are encouraged to use it now and must use it for applications on or after December 1, 2026.

The key points:

1. One-unit investment properties only. Second homes and two-to-four unit properties aren't covered.
2. The STR has to be legal. The property "must be legally permitted to operate as a short-term rental," including local registration and licensing. In Flagstaff, that means the City license or County permit. See Flagstaff and Arizona STR rules.
3. On a purchase, income comes from comps. Either a standard long-term rent schedule (Form 1007) or validated data on three comparable STRs from the MLS or property management companies, including their rates and days rented last year.
4. Lenders use 50% of gross rent. Net rental income is half the monthly gross rent. The lender then subtracts the full payment (principal, interest, taxes, insurance and HOA dues) to see what's left.
5. On a purchase, positive income only offsets the payment. If the math comes out positive, it can cover the property's own payment, not add to your qualifying income.
6. No income from an ADU. STR income "cannot be derived from an ADU."
7. Experience matters for positive income. Fannie's rental income rules require at least 12 months of property management experience to use positive rental income for qualifying.

Fannie also told appraisers in 2024 that multiplying a nightly STR rate by 30 to estimate monthly rent is incorrect. If a projection you've been handed does that, it's not how a lender will see it.

DSCR loans

A DSCR (debt service coverage ratio) loan qualifies you based on the property, not your paycheck. The ratio is the property's monthly rent divided by its full monthly payment. A 1.0 means the rent covers the payment exactly. These are non-QM loans, which means each lender sets its own rules, and they change often. Everything below is an example range, not a promise.

Sources: Griffin Funding (September 2026), Plaza Home Mortgage (January 2026), DSCR Authority (September 2026), America Mortgages (June 2026), MK Lending (July 2024).

One Flagstaff-specific caution. At least one lender's matrix we reviewed excludes rural properties from its DSCR program. If you're looking at a cabin out in the county, confirm the program allows it before you get attached.

A quick DSCR example

Say a lender projects $5,000 a month in STR revenue on a home and applies a 20% haircut. That's $4,000 of counted rent. If the full monthly payment (principal, interest, taxes, insurance and HOA) is $3,600, the DSCR is $4,000 divided by $3,600, or about 1.11. That clears a 1.0 minimum and just misses a 1.15 minimum. Small changes in rate, price or down payment move that number fast, which is why we run it before an offer, not after.

FHA and VA

Both are built for homes you live in, not STRs.

FHA is built around your principal residence, the place you'll spend the majority of the year, and FHA's rules specifically exclude vacation homes from its secondary residence category. On two-to-four unit properties, federal rules (24 CFR 203.16) require you to certify under oath that no part of the property will be rented "for transient or hotel purposes," which means any rental under 30 days. So the classic "live in one unit, Airbnb the others" plan doesn't work with an FHA loan.

VA loans require the veteran to certify, at application and at closing, that they intend to live in the home. A VA loan can buy a home of up to four units as long as you live there. Short-term renting any part of it is a question to take to your lender, in writing, before you plan on it.

1031 exchanges and other paths

1031 exchanges

If you're selling another investment property, a 1031 exchange may let you defer the tax by buying a Flagstaff STR. The IRS has a safe harbor (Revenue Procedure 2008-16) for a property that's rented to others but also occasionally used by the owners, with specific requirements you'll want to review with your advisors. Those details matter a lot with a mountain getaway you'll want to enjoy yourself, so work with a qualified intermediary and your CPA before you list the property you're selling.

Other options

Some buyers use a HELOC or cash-out refinance on another property, a portfolio loan from a local bank or credit union, or seller financing. Each has its own trade-offs in rate, risk and flexibility, and the right lender can walk you through them for your situation.

Questions to ask your lender

Before you write an offer, we like our clients to have clear answers to these:

1. Have you closed STR loans in Flagstaff? Local experience matters with appraisals, rural properties and HOA questions.
2. Which loan type fits how I'll use this home, and can you confirm that in writing?
3. How will you count STR income? Form 1007, STR comps, AirDNA, or my own rental history? What haircut?
4. Are you applying Fannie Mae's new STR rules yet, and how do they affect me?
5. What reserves will I need, counting my other financed properties?
6. What insurance will you require, and does it need to cover STR use specifically?
7. For DSCR: what's the minimum ratio, the prepayment penalty, and are rural or county properties eligible?
8. What happens if my plan changes to long-term renting, or to using it more myself?

We're happy to introduce you to lenders we trust who have closed STR loans here. Pair the loan with a realistic income projection from what a Flagstaff STR really earns and you'll know your numbers before you're under contract.

Frequently asked questions

Can I use a second home loan for an Airbnb?

Not if it's primarily a rental. Fannie Mae requires a second home to be occupied by you for part of the year, under your exclusive control, not a rental property, and not under a management agreement that controls occupancy. Rental income can't be used to qualify.

How much do I need to put down on a Flagstaff investment property?

At least 15% on a single-family home with a conventional investment loan, and 25% on two to four units. DSCR loans for STRs usually require 20% to 25%.

Can I use Airbnb income to qualify for a mortgage?

It depends on the loan. Under Fannie Mae's new STR rules, a lender uses 50% of the gross rent shown by a rent schedule or comparable STRs, and on a purchase, positive income can only offset the property's own payment. DSCR loans qualify mainly on the property's income.

Can I buy a duplex with FHA and Airbnb the other unit?

No. Federal FHA rules require borrowers on two-to-four unit properties to certify that no part of the property will be rented for less than 30 days.

What is a good DSCR for a short-term rental loan?

Many lenders look for at least 1.00 to 1.15 on STRs, meaning the counted rent covers the full payment with a little room to spare. Requirements vary by lender and program.