Phoenix DSCR Loans: The Lowest Tax Bill in the Sun Belt and a Coverage Ratio That Still Does Not Clear

Phoenix is the market that breaks the standard investor heuristic. The usual Sun Belt objection — taxes and insurance eat the cash flow — does not apply here. Maricopa County is one of the cheapest large-county tax jurisdictions in the country for residential property, Arizona has no hurricane exposure and modest hail loss history, and the state legislature eliminated the municipal tax on long-term residential rent. Every operating expense line an investor normally complains about is favorable.

The loan still does not size. Phoenix has a basis problem, not an expense problem, and DSCR underwriting is indifferent to which one you have. The ratio is rent divided by PITIA, and when the numerator is 0.45% of purchase price per month, no amount of expense discipline gets you to 1.20.

The tax bill is genuinely low, and it is not enough

Arizona assesses residential property at 10% of full cash value. Combined district rates in most of Maricopa County land in the $9 to $11 per $100 of assessed value range, which produces an effective rate on market value of roughly 0.50% to 0.60% for an owner-occupant.

Investors do not get that number. The Homeowner Rebate — the state-funded credit that offsets a portion of the primary-residence school district levy — applies only to owner-occupied Class Three property. A rental is Class Four, and it loses the credit. The practical result is that the same house carries a tax bill 20% to 35% higher for a landlord than for the family that sold it. Plan on 0.65% to 0.75% of market value, not the 0.51% the county average implies.

On a $425,000 rental that is roughly $2,975 a year, or $248 a month. For comparison, the same-priced house carries about $745 a month in Milwaukee and $505 in Dallas. Phoenix wins that line decisively. It is still going to lose the file.

Arizona repealed the rental sales tax, which is worth about $55 a month

Through 2024, most Arizona cities levied a transaction privilege tax on long-term residential rent — commonly 1.5% to 3.0% of gross collected rent, remitted by the landlord. Phoenix charged 2.3%. Senate Bill 1131 repealed the municipal authority to impose it effective January 1, 2025.

That is a real improvement to net operating income, but note carefully what it does not do: DSCR underwriting does not include a rental sales tax line. PITIA is principal, interest, taxes, insurance and association dues. The repeal improves the investor cash-on-cash return by roughly $50 a month on a $2,150 rent and improves the qualifying ratio by exactly zero. This distinction matters constantly in Arizona files, where sellers and agents present the repeal as a financing benefit. It is a cash flow benefit. The Arizona DSCR rules page tracks the state-level items that actually move underwriting — vesting, prepay enforceability, transfer tax treatment — separately from the ones that only move operating margin.

Running the stabilized single-family file

Take a representative deal. A 1998-build three-bedroom in the southwest valley at $425,000, market rent $2,150, HOA dues $65 a month, which is the norm rather than the exception in Phoenix subdivisions built after 1990.

Twenty-five percent down puts the loan at $318,750. At 7.25% on a 30-year fixed, principal and interest run about $2,175. Add $248 in taxes, $121 for a $1,450 landlord policy, and the $65 HOA. PITIA is $2,609 against $2,150 of rent. DSCR is 0.82.

That is not a marginal miss. Solve backwards for the loan amount that produces 1.00 coverage and you get roughly $251,500 — 59% LTV, meaning 41% down. Solve for the 1.20 that gets par pricing and the loan is about $199,000, or 47% LTV. A Phoenix single-family purchase at current basis and current rates requires something in the neighborhood of half the purchase price in cash to clear a standard coverage tier.

Investors who have not run this before assume the rate is the problem. It is not. Drop the rate 100 basis points to 6.25% and P&I on the same $318,750 falls to about $1,963, putting PITIA at $2,397 and DSCR at 0.90. Still short. The rent-to-price ratio is the binding constraint, and rate movement does not fix a numerator that is 40% too small. Running the same inputs through the DSCR ratio calculator at a few rate levels is the fastest way to see how flat that sensitivity is.

Two-to-four unit narrows it and does not close it

The standard fix for a thin single-family ratio is small multifamily, and Phoenix has real duplex and fourplex stock in the central corridor and around Glendale.

A $500,000 central-Phoenix duplex renting at $1,450 per side grosses $2,900. Two-to-four unit pricing typically carries a 0.25% add, so call it 7.50%. At 25% down, $375,000 amortizes to about $2,622. Taxes at 0.70% are $292, insurance on older duplex stock runs closer to $1,700 annually or $142, and there is usually no HOA. PITIA is $3,056 against $2,900. DSCR is 0.95.

Better — 0.95 versus 0.82 is the difference between a file that is 13 points from minimum coverage and one that is 18 points away — but still under the floor. Thirty-five percent down gets the duplex to about 1.09. Small multifamily in Phoenix improves the ratio; it does not rescue it.

Where Phoenix actually clears

Short-term rental is the structure that works in this metro, and it works because Arizona law is unusually permissive. SB 1350, passed in 2016, preempted municipal bans on vacation and short-term rentals statewide. SB 1168 in 2022 restored meaningful local authority over licensing, emergency contact requirements and penalties for repeat nuisance violations, but the preemption on outright prohibition survived. Phoenix and Scottsdale license and fine; they cannot zone the use out of existence the way Nashville or Los Angeles can.

That regulatory floor is what makes lenders willing to underwrite Arizona STR revenue. A $375,000 two-bedroom Scottsdale-adjacent condo grossing $52,000 annually, financed at 25% down and 7.875% — the typical 50 to 62 basis point STR add — carries P&I of about $2,039, plus $219 taxes, $108 insurance and $320 condo dues, for PITIA of $2,686. Against $4,333 of gross monthly revenue that is 1.61. Apply the 25% expense and vacancy haircut that the more conservative programs use and it is 1.21.

The haircut convention is the whole underwriting question, and it varies by lender more than any other STR variable — some use trailing twelve-month gross from the platform statements with no reduction, some require a full AirDNA or Rentometer projection net of a stated management factor. Which program you are in changes the maximum loan by six figures on the same property. The mechanics of that, including what documentation each tier accepts, are in short-term rental DSCR financing, and the Phoenix metro directory and STR destination pages separate lenders that treat Arizona STR as standard product from those pricing it as an exception.

The 1007 is the risk nobody prices in

Phoenix absorbed one of the largest multifamily supply deliveries in the country between 2022 and 2025 — tens of thousands of units in a metro that had never seen that pace — and metro-wide asking rents were flat to negative year over year through much of that stretch. Rent growth has stabilized, but the appraised market rent opinion has not caught back up to the optimism in listing pro formas.

Most programs qualify on the lesser of in-place lease rent and the 1007 market rent opinion. In a soft-rent metro that lesser-of rule bites regularly: a property leased at $2,150 that appraises to a $2,000 market rent loses about 0.06 of coverage on a number the borrower never negotiated and cannot appeal without closed lease comps. In Phoenix, order the rent survey expecting a haircut and size the loan off the appraiser's figure rather than the lease.

Insurance is the one line where Phoenix is quietly getting worse rather than better. Roof age drives Arizona pricing hard, and carriers have tightened on flat and foam roofs common in older central-corridor stock — a 20-year-old foam roof can move a quote from $1,400 to $2,600 or draw an actual-cash-value roof endorsement that some lenders will not accept. The coverage minimums and endorsement language that matter are covered in the DSCR insurance requirements guide.

What the Arizona file should look like

Three practical conclusions. First, do not plan a Phoenix long-term single-family acquisition on 20% or 25% down; the honest planning figure is 40% to 50% if you need 1.00 to 1.20 coverage, and if that return does not work, the deal does not work. Second, if the strategy is coverage-driven rather than appreciation-driven, Tucson offers a modestly lower basis at similar tax treatment and narrows the gap, though it does not close it either — Arizona as a whole is an appreciation market wearing Sun Belt cash-flow clothing. Third, if you want a Phoenix file that clears at conventional leverage, the answer is short-term rental, and the answer depends entirely on which lender's revenue convention you land in.

That last point is a shopping problem, not an underwriting problem. Two lenders looking at the same Scottsdale condo and the same platform statements will size the loan $80,000 apart. Compare programs on the lender directory before committing to a structure, because in this metro the program selection is worth more than the rate.