What is Rental Portfolio Score?
A rental portfolio benchmark evaluates your US investment properties across cap rate, vacancy, tenant retention, and maintenance costs.
The Formula
Score = (ฮฃ Category Scores รท Number of Categories) ร 100
Worked Example
A landlord with 5 single-family rentals across Indianapolis and Kansas City: 6.2% average cap rate, 4% vacancy, 78% tenant retention, 12% maintenance ratio.
- Cap rate: 6.2/7.0 target = 89/100
- Vacancy: 5/4 = 80/100 (lower is better)
- Retention: 78/85 target = 92/100
- Maintenance: 15/12 = 80/100 (lower is better)
- Overall = (89 + 80 + 92 + 80) รท 400 ร 100 = 85%
๐ The portfolio scores 85%, solid cap rate and retention but vacancy reduction and maintenance optimization would improve returns.
Why This Matters
Return optimization
A 1% improvement in cap rate across a $1.5M portfolio adds $15,000 in annual NOI. Small improvements compound dramatically over 10+ year hold periods.
Risk management
Benchmarking reveals overexposure to high-vacancy submarkets or property types before they impact cash flow. Single-family in good school districts typically outperforms class-C multifamily on vacancy.
Portfolio growth
Lenders assess portfolio performance when approving additional DSCR or conventional investor loans. Strong benchmarks improve borrowing capacity and unlock portfolio-level financing.
Common Mistakes
โ Using gross yield only
Cap rate after management (8-10%), maintenance, insurance, property taxes, and vacancy is typically 2-3% lower than gross yield. NOI-based cap rate drives decisions, not gross rent.
โ Ignoring tenant quality
Low vacancy means nothing if tenants pay late, violate leases, or damage the unit. Screen for FICO 620+, 3x rent income, and no prior evictions, use Experian RentBureau or TransUnion SmartMove.
โ Deferred maintenance
Skipping preventive maintenance saves short-term cash but increases long-term costs by 3-5x through larger failures (HVAC, roof, water damage) and risks habitability claims and tenant lawsuits.
Industry Benchmarks
| Category | Good | Average | Poor |
|---|---|---|---|
| Cap Rate | 7%+ | 5-7% | Below 4% |
| Vacancy Rate | Below 5% | 5-8% | Above 10% |
| Tenant Retention | 80%+ | 65-80% | Below 60% |
Source: NAR Investment & Vacation Home Buyers Report and RealPage Market Analytics
Benchmark data sourced from NAR Investment & Vacation Home Buyers Report and RealPage Market Analytics.