Most investors walk away from real estate because the numbers feel like a foreign language. Cap rate, NOI, cash-on-cash — it sounds technical, but the underlying logic is straightforward. If you can read a bank statement, you can learn to underwrite a rental property.
This article walks you through the framework that experienced investors use to evaluate a deal before putting a dollar in. Think of it as a checklist you can apply to any Texas single-family or small multifamily property.
Step 1: Estimate What the Property Can Actually Rent For
Start with gross rent — the monthly rent you could realistically collect. The keyword is realistically. Look at comparable rentals (same neighborhood, similar beds and baths, similar condition) on Zillow, Rentometer, or through a local property manager. In DFW, rents vary sharply by submarket: a 3/2 in Mesquite rents differently than one in Frisco.
Use a conservative figure. If comps range from $1,600 to $1,850, model $1,650. You can always be pleasantly surprised — you cannot unspend a shortfall.
Annual Gross Rent = Monthly Rent × 12
Step 2: Build In a Vacancy Assumption
No property stays rented 365 days a year. Tenants turn over, units need refreshing, and sometimes you just have a slow leasing month. The Dallas-Fort Worth metro has historically run 5–8% vacancy on single-family rentals, but use 8–10% when modeling a new acquisition to stay conservative.
Effective Gross Income (EGI) = Gross Rent × (1 − Vacancy Rate)
Step 3: Account for Every Operating Expense
This is where inexperienced investors get burned. They see the rent check and forget everything that comes out before it reaches them. Here is a realistic expense stack for a Texas rental:
| Expense | Typical Range |
|---|---|
| Property Taxes | 1.8%–2.5% of assessed value (use county CAD as a proxy) |
| Insurance | $1,200–$2,000/year for a typical SFR |
| HOA (if applicable) | Varies — verify before closing |
| Maintenance & Repairs | 10%–15% of gross annual rent |
| Property Management | 8%–10% of collected rent |
| Vacancy (already deducted above) | — |
A Texas-specific note: property taxes here are among the highest in the country because the state has no income tax. Before you close on any property, pull the current assessed value from the county Central Appraisal District (CAD) website — every county has a public portal. That number, multiplied by the local tax rate, gives you a solid estimate of your annual tax bill.
Step 4: Calculate Net Operating Income (NOI)
NOI tells you what the property earns after operating expenses, before debt service (your mortgage or loan payment).
NOI = Effective Gross Income − Total Operating Expenses
If your EGI is $19,800 and your annual operating expenses total $10,200, your NOI is $9,600. That is the number every serious investor looks at first.
Step 5: Calculate Cap Rate
Cap rate (capitalization rate) is how investors compare properties regardless of how they are financed. It answers the question: if you paid all cash, what return would the property generate?
Cap Rate = NOI / Purchase Price
Using the example above: $9,600 NOI / $200,000 purchase price = 4.8% cap rate. In DFW, stabilized single-family rentals have generally traded in the 4%–6% range, depending on submarket and property condition. Higher cap rates often signal more risk (deferred maintenance, weaker rental demand), not just better deals.
Step 6: Calculate Cash-on-Cash Return
This is the number that tells you what you actually earn on the cash you put in, after debt service.
Annual Cash Flow = NOI − Annual Debt Service
Cash-on-Cash Return = Annual Cash Flow / Total Cash Invested
Total cash invested includes your down payment, closing costs, and any immediate repairs. If you put $55,000 into a deal and it produces $3,300 in annual cash flow, your cash-on-cash return is 6% — illustrative, not a guaranteed outcome.
Step 7: Find Your Break-Even Rent
This is the rent level at which the property neither gains nor loses money after all expenses and debt service. If you know your break-even, you know your margin of safety.
Break-Even Rent = (Total Annual Expenses + Annual Debt Service) / 12
If your break-even is $1,400/month and the market rents for $1,700, you have $300/month of cushion. That cushion is what absorbs a bad month, a surprise repair, or a rent concession.
Putting It All Together
Underwriting is not about finding a perfect deal — it is about understanding exactly what you are buying before you commit capital. The investors who build lasting wealth in Texas real estate are the ones who run these numbers on every property, even when the deal looks obvious.
At EXL Capital Group, this is the same framework applied when evaluating private investment opportunities in the DFW market. Pre-qualified investors who want to see how deals are structured and underwritten can request access through the investor list — participation is limited and this article is educational only, not an offer to sell securities.
See how EXL Capital structures investor opportunities
EXL Capital Group offers private real estate investment opportunities in the Dallas–Fort Worth market. This is not a public offering. Participation is limited to qualified investors. This article is educational only and is not an offer to sell securities.