The quick read: A DSCR loan on a Des Moines rental property is sized on the building's rent divided by the full monthly payment, not on the investor's personal income. NerdWallet's DSCR guide (updated July 17, 2026) says lenders generally want a ratio of around 1.25 or higher and count principal, interest, taxes, insurance and association fees in the payment. In Des Moines the line that moves is property tax. Iowa reassesses real property every odd-numbered year, the state then applies a rollback (44.5345% of assessed value for residential property on the 2025 assessment), and Polk County's consolidated levy for a Des Moines parcel runs from 43.74496 to almost 46 per $1,000 of taxable value depending on the district. Model the reassessed tax line, apply the rollback, then check the ratio.
How does a DSCR loan work on a Des Moines rental property?
A DSCR loan on a Des Moines rental property qualifies the deal on the rent the units produce compared with the full monthly payment, rather than on the investor's tax returns, and it applies to business-purpose rentals the borrower does not live in. The ratio decides the loan size.
NerdWallet puts the formula as monthly rental income divided by the monthly loan payment, with the payment including principal, interest, taxes, insurance and HOA fees. A DSCR calculator runs the same division. NerdWallet's description of typical requirements is a starting point, not a market rule, because each lender sets its own sheet:
Typical minimum DSCR (NerdWallet, updated Jul 17, 2026): around 1.25 or higher Credit score (NerdWallet, updated Jul 17, 2026): at least 620 Down payment (NerdWallet, updated Jul 17, 2026): at least 20% Reserves (NerdWallet, updated Jul 17, 2026): three to six months of mortgage payments Typical DSCR loan rates (NerdWallet, updated Jul 17, 2026): 6% to 8% Prepayment (NerdWallet, updated Jul 17, 2026): most DSCR loans carry prepayment penalties
Occupancy matters on Des Moines duplexes because buyers sometimes plan to live in one side. The CFPB's official interpretation of Regulation Z (comment 3(a)-4) says credit to acquire, improve or maintain rental property that is not owner-occupied is deemed to be for business purposes regardless of the number of units, and comment 3(a)-5 says acquisition credit on owner-occupied rental property is deemed business purpose only if it contains more than 2 housing units. NerdWallet also says a DSCR loan can't be used to buy a primary residence. If you will live in the building, a DSCR loan is usually the wrong product.
Which Des Moines rental buildings fit DSCR sizing?
The Des Moines buildings that fit DSCR sizing best are the two-to-eight-unit rentals found in older neighborhoods such as Beaverdale, the Drake Neighborhood and Ingersoll-Grand, because they are small enough to underwrite on rent alone and rarely need the full commercial process. Larger buildings move into a different lane.
New small rentals are scarce, which is why the existing stock carries this market. The Census Bureau's 2025 annual Building Permits Survey place file for the City of Des Moines shows 37 two-unit buildings (74 units) and a single three-or-four-unit building (4 units) permitted in 2025, against 16 buildings of five or more units carrying 1,377 units. Across the Des Moines-West Des Moines metro the 2025 file shows 57 buildings of five or more units with 2,675 units, an average near 47 units per building. New construction is going into large buildings; the duplex, fourplex and eight-plex inventory a DSCR investor buys is mostly older.
That shapes underwriting. An older fourplex in Beaverdale or a converted house near Drake will be appraised on comparable rents and sales, and the lender will look closely at deferred maintenance, because NerdWallet notes DSCR loans are meant for rent-ready property, not fixer-uppers. A building that needs a gut renovation usually starts with a short-term loan and refinances into DSCR once it is leased.
How do Polk County property taxes enter the DSCR?
Polk County property taxes enter the DSCR through a three-step calculation: the assessor sets a market value, the Iowa Department of Revenue's rollback converts that value to taxable value, and the consolidated levy for the parcel's district is applied per $1,000. A small rental's tax line follows that chain.
The rollback is the part out-of-state investors miss. The Iowa Legislative Services Agency's January 7, 2026 explainer says the state limits growth in aggregate residential taxable value from revaluation to 3.0% per year and calculates the rollback to enforce that. The Department of Revenue's order for the 2025 assessment sets residential property at 44.5345% of actual value, payable in the fiscal year July 1, 2026 to June 30, 2027. The same LSA explainer says that beginning with the 2022 assessment, properties from the former multiresidential class were combined into the residential class, so a typical apartment building now takes the residential rollback. Commercial property is different: the first $150,000 of a property unit is taxed at 44.5345% and the rest at 90%. Confirm the class on the parcel record, because a mixed-use building with a storefront may not be residential.
The levy depends on the district. Polk County's consolidated rate sheet for 2025 assessed valuations, payable September 2026 and March 2027, lists these Des Moines districts in the Des Moines school district:
Annual tax per $100,000 of assessed value, residential class, 2025 assessment (illustrative arithmetic on Polk County and Iowa Department of Revenue figures):
| Line | Des Moines city, DM schools | Beaverdale SSMID | Ingersoll Grand SSMID | Sherman Hill SSMID | Downtown SSMID |
|---|---|---|---|---|---|
| Line Consolidated rate per $1,000 taxable | Des Moines city, DM schools 43.74496 | Beaverdale SSMID 45.49494 | Ingersoll Grand SSMID 45.99496 | Sherman Hill SSMID 45.24496 | Downtown SSMID 45.04496 |
| Line Rollback, residential | Des Moines city, DM schools 44.5345% | Beaverdale SSMID 44.5345% | Ingersoll Grand SSMID 44.5345% | Sherman Hill SSMID 44.5345% | Downtown SSMID 44.5345% |
| Line Taxable value per $100,000 assessed | Des Moines city, DM schools $44,535 | Beaverdale SSMID $44,535 | Ingersoll Grand SSMID $44,535 | Sherman Hill SSMID $44,535 | Downtown SSMID $44,535 |
| Line Annual tax per $100,000 assessed | Des Moines city, DM schools $1,948 | Beaverdale SSMID $2,026 | Ingersoll Grand SSMID $2,048 | Sherman Hill SSMID $2,015 | Downtown SSMID $2,006 |
Credits and exemptions are not included. A seller who lived in the building may have had a homestead credit on the bill, and an investor will not inherit it, so ask for the parcel's gross tax before credits.
What does the DSCR math look like on an illustrative Beaverdale fourplex?
On an illustrative Beaverdale fourplex assessed at $480,000, the residential rollback and the Beaverdale district levy produce about $9,725 a year in tax, and with four two-bedroom units renting near the area's fair market rent the ratio lands around 1.35. That leaves room, but not much.
HUD's FY2026 fair market rent for a two-bedroom unit in the Des Moines-West Des Moines metro area is $1,318 a month, as reprinted in Iowa's 2026 HOME rent limit tables. The example below uses $1,300 per unit. Every other input is an assumption chosen for illustration:
Rent: 4 units at $1,300 = $5,200 per month Loan: $420,000, 30-year amortization at 7.00%, inside NerdWallet's 6% to 8% typical range = $2,794 principal and interest Tax: $480,000 x 44.5345% x 45.49494 per $1,000 = $9,725 per year, $810 per month Insurance: $250 per month (assumed) Total payment: $3,855 per month DSCR: $5,200 / $3,855 = about 1.35
The cushion above 1.25 is roughly $480 of monthly rent. That cushion is what the next reassessment eats into.
Why does Iowa's two-year reassessment matter for a DSCR quote?
Iowa's two-year reassessment matters because the tax bill a lender underwrites today rests on an assessment that will be reset in January 2027, and that new value will reach the bill in September 2028, well inside the life of a 30-year DSCR loan. Underwrite the next bill, not just the current one.
The timing comes straight from the LSA explainer: real property is assessed every odd-numbered year, and bills are due in the fall and spring two years after the assessment year, so 2025 assessments are paid in September 2026 and March 2027. The 2027 assessment will therefore be paid in September 2028 and March 2029.
The rollback cushions the statewide average, not your parcel. The LSA's rollback table shows the residential rollback fell from 56.4919% for the 2022 assessment to 46.3428% for the 2023 assessment, a drop the state imposes when values rise far faster than the 3% cap. A building whose value rises faster than the statewide residential average still sees its taxable value climb after the rollback. Holding the 44.5345% rollback and the Beaverdale rate constant, here is the same fourplex if its 2027 assessment rises:
Assessment up 10% ($528,000): tax $10,698 per year, payment $3,936, DSCR about 1.32 Assessment up 20% ($576,000): tax $11,670 per year, payment $4,017, DSCR about 1.29 Assessment up 30% ($624,000): tax $12,643 per year, payment $4,098, DSCR about 1.27
Rents may rise too, and the 2027 rollback will move. The point is the direction: a property bought on a thin ratio can drift toward 1.25 with nothing changing but the assessment. If the deal only works at the current tax bill, reprice it or put more cash in.
Which lender types will finance a Des Moines rental on DSCR?
Des Moines rentals of two to four units are typically financed by DSCR lenders and some banks on residential-style terms, while buildings of five units or more usually move to commercial lenders that size on net operating income, so the unit count decides which quotes you can compare. Ask early which lane applies.
Two to four units. These are the core DSCR product. NerdWallet notes DSCR loans can close through an LLC, require less documentation than conventional mortgages and are offered by some large and regional banks as well as specialist online lenders. Expect a prepayment penalty schedule and compare it as carefully as the rate.
Five to eight units. Many DSCR programs stop at four units, and a five-to-eight-unit building is often underwritten as small-balance commercial, with a debt-service test on net operating income, a shorter term or a balloon, and more attention to the operating history. NerdWallet's comparison table lists commercial real estate loans at 5 to 10 year terms with a balloon payment. The tax analysis above applies either way.
For the Iowa context beyond Des Moines, the Iowa market hub collects our state material, and our guide to what DSCR you need for a rental property in Omaha walks through a neighboring market's tax math.
How do you get lenders competing for a Des Moines DSCR loan?
You get lenders competing for a Des Moines DSCR loan by sending each one the same complete package, with the leases, the gross tax before credits for the parcel's district and the target loan size stated, so their quotes can be compared on equal terms. YieldStack is a commercial mortgage brokerage.
YieldStack's software matches the deal against a catalog of 20,000+ loan programs, which is a count of programs, not of lenders. Human brokers then structure the request, negotiate for the borrower and carry the deal toward closing. 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.
What to send:
- Property address, Polk County parcel number and district, and the current gross tax before any homestead credit
- Current leases or a rent roll for every unit, with deposits and vacancy history
- An insurance quote or the current declarations page
- Purchase contract or payoff statement and any recent capital work
- Target loan amount, expected hold and the prepayment penalty you can accept
- Ownership entity documents and a schedule of other rentals you own
The Des Moines market hub collects our local material; it is not a promise of any particular lender or term. When the package is ready, send the 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.
The bottom line
A DSCR loan on a Des Moines rental comes down to documented rent over the full payment, and the tax line is where the math slips. Build it from the assessed value, the 44.5345% residential rollback and your district's consolidated rate, leave out the seller's credits, and stress it for the 2027 reassessment that reaches bills in September 2028.