The quick read: A DSCR loan on a Mobile rental house or duplex qualifies on the property's rent divided by the full monthly payment, and a consumer guide puts the usual floor at around 1.25, though each lender sets its own. The Mobile-specific trap is the tax class. Alabama assesses single-family owner-occupied homes at 10% of appraised value (Class III) and property not otherwise classified, which is where a rental lands, at 20% (Class II). The same house at the same millage carries twice the assessed value once it is a rental, so the seller's bill is not the buyer's bill. Since tax collections beginning October 1, 2025, a change in classification or ownership also removes Alabama's new 7% cap on assessed value increases, so the reset can be larger still.
How does a DSCR loan work on a rental house or duplex in Mobile?
A DSCR loan on a Mobile rental house or duplex works by dividing the property's monthly rent by the full loan payment, and NerdWallet's DSCR guide (updated Jul 17, 2026) says a ratio of around 1.25 or higher is generally needed. That is a consumer guide's typical figure; every lender publishes its own minimum and terms.
NerdWallet defines the payment side as principal, interest, taxes, insurance and homeowners association fees, so the two local lines in Mobile, property tax and windstorm insurance, sit inside the ratio rather than beside it. The same guide says lenders verify the ratio through a property appraisal and generally want a credit score of at least 620, a down payment of at least 20%, a minimum loan of around $100,000 and three to six months of mortgage payments in reserve, and that most of these loans come with prepayment penalties. You can test your own numbers in the DSCR calculator.
The loan is for property you rent out, not a home you live in. The CFPB's official commentary to Regulation Z says credit to acquire, improve, or maintain rental property (regardless of the number of housing units) that is not owner-occupied is deemed to be for business purposes, and that a property the owner expects to occupy for more than 14 days in the coming year cannot be considered non-owner-occupied. NerdWallet adds that DSCR loans can't be used to buy a primary residence.
Typical minimum DSCR (NerdWallet, updated Jul 17, 2026): around 1.25 or higher Typical minimum credit score (NerdWallet, updated Jul 17, 2026): at least 620 Typical down payment (NerdWallet, updated Jul 17, 2026): at least 20% Typical reserves (NerdWallet, updated Jul 17, 2026): three to six months of mortgage payments
Why does renting out a Mobile house double its assessed value?
Renting out a Mobile house doubles its assessed value because the Alabama Department of Revenue's class table puts single-family owner-occupied residential property in Class III at 10% of appraised value, while all property not otherwise classified, including a tenant-occupied rental, falls in Class II at 20%, and the same millage then applies to twice the base.
The Department's formula is two steps: appraised value times the class percentage gives the assessed value, and assessed value times the millage rate gives the unadjusted tax bill. Its class table lists Class III as all agricultural, forest, and single-family owner-occupied residential property, plus historic buildings and sites, at 10%, and Class II as all property not otherwise classified at 20%. Homestead exemptions then come off an owner-occupant's bill, and the Department defines a homestead as a single-family owner-occupied dwelling, so a landlord loses those as well.
Class III is defined around a single-family, owner-occupied home. A duplex, or a house you buy to rent, is a different case, so ask the Mobile County Revenue Commission how the seller's parcel is classified today. If any part of the current bill reflects Class III or a homestead exemption, your tax will be higher. In Oakleigh Garden District and other historic areas, the Class III line for historic buildings and sites is worth asking about building by building; do not assume a rental qualifies.
The second reset is new. The Department's guidance on Act 2024-344 says a 7% cap on annual increases in taxable assessed value for Class II and Class III real property took effect with tax collections beginning October 1, 2025, and that the cap comes off when the property's classification changes, with residential (Class 3) to commercial (Class 2) as its example, or when the property changes ownership. Rule 810-4-1-.28 says the whole parcel is then excluded from the cap. A long-held house whose taxable value was capped below its true assessed value resets on your purchase.
Class III, single-family owner-occupied residential (Alabama Department of Revenue): 10% of appraised value Class II, all property not otherwise classified (Alabama Department of Revenue): 20% of appraised value Annual cap on taxable assessed value increases, Class II and III (Act 2024-344): 7% Cap removed on (Rule 810-4-1-.28): change of classification or change of ownership
What millage rate applies to a rental in the City of Mobile?
A rental inside the City of Mobile carries 63.5 mills by our arithmetic from the Alabama Department of Revenue's October 2025 millage sheet: 6.5 state, 20.5 county, 29.5 school for the Mobile and Prichard district, and 7.0 municipal, so each $100,000 of appraised value costs $635 a year in Class III and $1,270 in Class II.
The Department's sheet lists Mobile County's levies as a state total of 6.5 mills, a county total of 20.5, a combined school total of 29.5 for Mobile and Prichard, and a City of Mobile municipal levy of 7.0. Its own page notes that the Property Tax Division makes no assertions as to the accuracy of the millage rate information, so confirm the parcel's levies with the Revenue Commission before you lock a tax estimate. A parcel outside the city limits drops the municipal levy and may sit in a different school district on the same sheet.
City of Mobile total millage, October 2025 (our arithmetic from ADOR's sheet): 63.5 Tax per $100,000 of appraised value, Class III (our arithmetic): $635 Tax per $100,000 of appraised value, Class II (our arithmetic): $1,270
What does the 10% to 20% switch do to a Midtown duplex's DSCR?
On our illustrative Midtown duplex, modelling the tax at Class II instead of Class III cuts the coverage ratio before insurance from about 1.77 to about 1.62 and takes roughly $116 a month out of the room the deal has left for a windstorm policy before it falls to a 1.25 floor.
Illustrative example (our arithmetic, not a quote or a lender offer): a Midtown duplex bought and appraised at $220,000 rents at $1,100 a side. The loan is 75% of price, $165,000, at 7.25% on a 30-year amortization, which is about $1,126 a month of principal and interest. Tax uses 63.5 mills. We have not assumed an insurance premium; the last row shows how much monthly premium each version can absorb before the ratio drops to 1.25.
Table: Midtown duplex modelled at the seller's class versus a landlord's class (illustrative)
| Line | Taxed at Class III, 10% | Taxed at Class II, 20% |
|---|---|---|
| Line Appraised value | Taxed at Class III, 10% $220,000 | Taxed at Class II, 20% $220,000 |
| Line Assessed value | Taxed at Class III, 10% $22,000 | Taxed at Class II, 20% $44,000 |
| Line Annual tax at 63.5 mills | Taxed at Class III, 10% $1,397 | Taxed at Class II, 20% $2,794 |
| Line Monthly tax | Taxed at Class III, 10% $116 | Taxed at Class II, 20% $233 |
| Line Monthly rent | Taxed at Class III, 10% $2,200 | Taxed at Class II, 20% $2,200 |
| Line Principal, interest and tax | Taxed at Class III, 10% $1,242 | Taxed at Class II, 20% $1,358 |
| Line DSCR before insurance | Taxed at Class III, 10% 1.77 | Taxed at Class II, 20% 1.62 |
| Line Monthly insurance the deal can carry at 1.25 | Taxed at Class III, 10% about $518 | Taxed at Class II, 20% about $402 |
The second column is the one a lender will underwrite. If the listing's tax figure came from an owner-occupant's bill, the duplex looks like it can carry about $6,200 a year of insurance at a 1.25 ratio; on the landlord's class it can carry about $4,800. That gap matters on the Gulf Coast, because the windstorm line is the one you cannot shrink by negotiating with the seller. If the seller's taxable value was also capped, the true assessed value after your purchase is higher again.
How should you handle insurance on a Mobile DSCR loan?
Handle insurance on a Mobile DSCR loan by getting a written quote that names the windstorm and named-storm deductible before you sign a purchase contract, because insurance sits inside the DSCR payment alongside tax, and on our example the policy has to fit in about $400 a month for the duplex to hold a 1.25 ratio.
Do not borrow an insurance number from a listing, a neighbor or a national average. The Alabama Department of Insurance's Strengthen Alabama Homes program says wind mitigation in Alabama provides homeowners discounts to their wind insurance premium and deductible, so a roof built or retrofitted to the FORTIFIED standard it uses can change the quote. Its grants, though, are limited to existing, owner-occupied, single-family homes, with no rentals. If the seller fortified the roof, ask for the certificate and give it to your agent; if not, a landlord cannot use that grant to do it.
Ask each lender which deductible it will accept, whether it requires a separate windstorm policy, and how it treats a quote that arrives after the appraisal. A ratio that clears 1.25 on an estimate and misses on the bound policy is a re-trade at the worst point in the deal.
What does Mobile's permit data say about its rental stock?
Mobile's rental construction runs at duplex-to-small-walk-up scale: the Census Bureau's 2025 annual file shows the City of Mobile with 19 buildings of five or more units holding 102 units, about 5.4 units per building by our arithmetic, alongside 199 single-family buildings and no two-unit or three-to-four-unit buildings.
The metro file for Mobile shows the same 19 buildings and 102 units in the five-plus category, plus 5 two-unit buildings holding 10 units and 1 three-to-four-unit building outside those city totals, and 986 single-family buildings. These are permit authorizations, not completions. The city file values the 102 units at $21.4 million of construction, about $210,000 a unit by our arithmetic.
Unit count sorts the lender list. A house, duplex or fourplex goes to DSCR lenders, banks and credit unions, each on its own terms. A building of 5 to 50 units adds agency options such as Freddie Mac's Conventional Small program, with loans of generally $2 million to $10 million, a 1.25x minimum amortizing debt coverage ratio and maximum loan-to-value of 75% to 80% depending on term. At about $210,000 a unit, even a six-unit building's full construction value sits below that program's generally $2 million starting point, so a small walk-up at that cost would typically look to DSCR lenders, banks and credit unions instead. For the same Class II math in the state's largest metro, see the Birmingham DSCR guide; if a house needs work before it can rent, see how to compare hard money lenders in Alabama.
5+ unit buildings permitted, City of Mobile, 2025 (Census BPS): 19 Units in those buildings (Census BPS, 2025): 102 Average units per 5+ building (our arithmetic): about 5.4 Two- to four-unit buildings permitted, City of Mobile, 2025 (Census BPS): 0
How do you get lenders competing for a Mobile DSCR loan?
Lenders compete on a Mobile DSCR loan when each one sees the same complete package, including the parcel's current class, a tax estimate at the landlord's Class II rate and the city's millage, and a bound-ready insurance quote with its windstorm deductible, so their offers differ on rate and structure instead of on assumptions.
YieldStack is an AI-native commercial mortgage brokerage that arranges financing for commercial real estate investors. Software matches the deal against 20,000+ loan programs and compares the options; human brokers structure the deal, negotiate on the borrower's side and carry it toward closing. YieldStack reports a median first offer in under an hour, from an institutional lender. Every credit decision is made by the lender; YieldStack arranges the introductions and negotiates on the borrower's side, and no loan, rate, or closing is guaranteed.
For a Mobile rental in Midtown, Toulminville or Oakleigh, the package that gets clean quotes carries:
- Leases or a market rent schedule for each unit
- The parcel's current class and whether the seller held a homestead exemption
- A tax estimate at Class II, 20%, and the parcel's millage
- A written insurance quote with the windstorm deductible, and any FORTIFIED certificate
- Purchase contract, appraisal if available, and any repair scope
- Target loan amount, hold period and the prepayment penalty you can accept
When it is ready, send the Mobile deal for review. It costs Zero upfront to submit a deal and review offers; YieldStack's broker fee is 0.50–1.00% of the loan amount and is paid only at closing. Local context is on the Mobile market hub and the Alabama market hub.
The bottom line
A Mobile DSCR loan qualifies on rent over the full payment, with around 1.25 a common floor. Rebuild the tax line at Class II, 20% of appraised value, not the seller's 10% Class III bill, expect the 7% cap to reset on your purchase, and get a written windstorm quote before you trust any ratio.