DSCR Analysis: Duplex in DFW — Would You Close at 1.18x?

Question

I ran the numbers on a duplex in Dallas-Fort Worth.

Purchase price: $420,000

Monthly rent: $3,400 (2 units)

Vacancy: 6%

Annual operating expenses: $17,472

With 25% down at 7.5%, here's what I got:

NOI: $20,856/yr

Annual debt service: $26,388

DSCR = 0.79x

That's well below the 1.25x most DSCR lenders require. This deal bleeds $461/mo from day one.

To fix it, I'd need one of:

- Rent increase to $4,300/mo (+$900)

- Price reduction to $320k

- 40% down payment instead of 25%

Two questions for the community:

1. What DSCR are lenders actually requiring in DFW right now? Still 1.25x or are some going lower?

2. What vacancy rate do you use for DFW duplexes? I used 6% but I've heard arguments for 4-5% in that market.

Would love to hear from anyone actively underwriting deals in North Texas.

Doug Smith · Answer

Long-time commercial lender here. I remember when the new DSCR product hit the market where DSCR = Monthly 1007 Income / PITI + HOA (that's it), it was odd to us commercial lenders that always added other things like management fees, replacement reserves, and other expenses. To us, the investor DSCR wasn't really DSCR, but now it seems it's a staple product. To get a deal done, investor DSCRs are usually simply 1.0X or over with some programs even below 1.0X. We are seeing investors put more down to get the properties to cash flow better, so we don't see many 15% - 20% down deals anymore...depending upon the market. Most of them are 25% to 35% down that we're seeing. It's not necessarily a program requirement. It just makes the deal cash flow stronger. Now, the way commercial banks calculate DSCR for true commercial deals is still 1.25X, 1.30X or more, but those calculations also include those other expenses that investor DSCR does not. Does that answer your question of what we're seeing?

Matthew Bernal · Answer

You’re looking at it the right way by backing into DSCR before getting emotionally attached to the deal. At 0.79x, most standard DSCR lenders would have trouble there, though some programs can be more flexible depending on reserves, LTV, credit, and overall profile.

In DFW, vacancy assumptions can vary by submarket, tenant profile, and recent rent comps so sometimes the bigger lever is actually rent support or purchase price, not just vacancy.

I help investors structure deals like this often and compare realistic financing paths before they commit. What part of DFW is the duplex in, and are those current rents market or below-market?

Dominic Mazzarella · Answer

1.18x on a duplex in DFW is borderline, especially if you’re relying on DSCR alone. I’ve passed on deals like that because you’re cutting it tight if anything goes wrong,vacancies, maintenance, or unexpected repairs.If you’re comfortable with the risk and have reserves, it might pencil out, but I wouldn't pull the trigger without a good buffer. Remember, a slight hiccup can turn a thin margin into a loss pretty quick. I'd want closer to 1.3x before getting serious on something like that.

Vontay Callahan · Answer

Based on the numbers you shared, your analysis is spot‑on — at the current price and rent structure, this deal won’t clear DSCR underwriting in DFW.

A few points that may help:

1. DSCR Requirements in DFW Right Now  
Most DSCR lenders are still targeting 1.20–1.25x for long‑term rentals.
There are a few programs that will go down to 1.10–1.15x, but you’ll see:

• Higher rates
• Lower max LTV
• Tighter credit overlays
At 0.79x, this deal won’t qualify with any mainstream DSCR lender.

2. Your Vacancy Assumption  
Your 6% vacancy is reasonable for DFW duplexes.
Some underwriters will allow 4–5%, but even if you drop vacancy to 4%, the DSCR still won’t get close to the threshold.

3. What Would Make This Deal Work  
Your three levers are correct:

• Rent to $4,300 — aggressive for most DFW duplexes unless it’s new construction or in a premium submarket
• Price closer to $320K — this is the most realistic fix
• 40% down — solves DSCR but destroys return on equity

If the seller won’t move on price, this is one of those deals where the math just doesn’t cooperate.

4. Market Context  
DFW duplexes have appreciated faster than rents in the last 24 months, so a lot of them look like this right now — great assets, but not DSCR‑friendly at current pricing.

If you want, I can help you re‑run the numbers with different rent comps or look at alternative financing structures, but based on what you posted, your conclusion is solid.