Analyzing Your First Rental Property
A step-by-step underwriting checklist for single-family and small multifamily — what to trust, what to verify.

Your first rental can be the deal that launches a portfolio or the deal that drains one. The difference is disciplined underwriting. Here's the checklist.
Step 1: Estimate true gross rent
Don't trust the seller's pro forma. Verify:
- ▸Check Rentometer, Zillow Rentals, and Apartments.com for current rents in the micro-market.
- ▸Vacancy rate: 5–8% is standard for well-managed single-family.
- ▸Other income: laundry, parking, storage ($50–200/mo).
Conservative = right. Model at 92% occupancy minimum.
Step 2: True expenses (the 50% rule)
A quick screen: operating expenses typically run 45–55% of gross rent for single-family, 40–50% for multifamily with professional management. The line items:
- ▸Property tax: 1–2.2% of value annually.
- ▸Insurance: 0.5–1.5% of value, higher in risk zones.
- ▸Property management: 8–12% of gross rent.
- ▸Maintenance: 1% of value/year (more on older homes).
- ▸CapEx reserve: $50–150/unit/month for roofs, HVAC, etc.
- ▸HOA, utilities (if you pay), turnover costs.
Step 3: The 1% rule screen
Does monthly rent exceed 1% of the purchase price? On a $200K property, you want $2,000+/month rent. It's a quick filter, not a verdict — many great deals miss it in high-cost markets but win on appreciation.
Step 4: Down payment & financing
- ▸Owner-occupant (if house-hacking): 3.5–5% down.
- ▸Investor: typically 20–25% down, higher rate.
Run the DSCR — lenders want 1.25x minimum on investment loans.
Step 5: The 5-year reality check
Build a 5-year projection:
- Rent growth (conservative — 2–3%/yr).
- Expense growth (3%/yr).
- Appreciation (market-specific).
- Refi or sale proceeds.
If the deal only works with aggressive assumptions, it doesn't work. The Rental ROI tool runs all five years with your inputs so the answer is a number, not a feeling.
Ready to run your own numbers?
Get your free NestCost Score — your honest affordability number, built from your income, debts, and savings.
Get my NestCost Score