The Revenue Side
Gross rental income is straightforward: monthly rent times 12. But effective gross income is always lower due to vacancy and collection losses.
On a $1,800/month rental:
- Gross potential income: $21,600/year
- Vacancy allowance (8%): -$1,728
- Collection loss (2%): -$432
- Effective gross income: $19,440/year
An 8% vacancy rate assumes roughly one month vacant per year between tenants, including turnover time for cleaning, repairs, and marketing. In tight rental markets, vacancy may be 4-5%. In soft markets or with problem properties, it can hit 15-20%.
The Expense Side
Fixed Costs
- Property tax: $2,200-$5,000/year (varies by state — see HomeStats)
- Insurance: $1,200-$2,400/year (landlord policy, higher than owner-occupied)
- Property management: 8-10% of collected rent ($1,555-$1,944/year)
- Accounting/tax prep: $300-$600/year
Variable Costs
- Maintenance: 10-15% of rent ($2,160-$3,240/year)
- Capital expenditures (CapEx): 5-10% of rent ($1,080-$2,160/year)
- Turnover costs: $1,500-$3,000 per turn (paint, carpet, cleaning, marketing)
- Legal/eviction: $0-$8,000 (hopefully zero, but budget for it)
Sample P&L: $250,000 Property, $1,800/month rent
| Line Item | Annual |
|---|---|
| Effective Gross Income | $19,440 |
| Mortgage P&I (25% down, 7%) | -$11,954 |
| Property Tax | -$2,750 |
| Insurance | -$1,800 |
| Management (8%) | -$1,555 |
| Maintenance (10%) | -$1,944 |
| CapEx Reserve (7%) | -$1,361 |
| Accounting | -$400 |
| Net Cash Flow | -$2,324 |
This property loses $194/month in cash flow. That’s the reality for many single-family rentals purchased at 2024-2026 prices and rates.
Where Returns Actually Come From
If the property is cash-flow negative, why would anyone invest?
1. Principal Paydown
$2,800/year in year one, growing to $5,000/year by year 10. Your tenant is building your equity.
2. Appreciation
At 3% annually, the $250,000 property is worth $336,000 in 10 years — $86,000 in value gain on $62,500 invested (25% down). That’s a 138% return on equity from appreciation alone.
3. Tax Benefits
Annual depreciation: $250,000 building × (1/27.5) = $9,091. This paper loss can offset rental income and, for qualifying real estate professionals, other income.
4. Rent Growth
If rents grow 3-4% annually, $1,800/month becomes $2,400/month in 10 years. Cash flow turns positive around year 4-6 as rent grows but the mortgage stays fixed.
The Costs Nobody Mentions
Tenant Damage Beyond the Deposit
Security deposits cover minor wear. When a tenant causes $8,000 in damage (pets, neglect, intentional destruction), you’re eating most of that cost. Deposits are capped by state law (often 1-2 months’ rent).
Eviction Timeline and Cost
In tenant-friendly states (CA, NY, NJ, MA), eviction can take 3-6 months and cost $5,000-$10,000 in legal fees plus lost rent. During that time, the property may also sustain damage.
Regulatory Compliance
Landlord-tenant law varies by state and municipality. Rent control, just-cause eviction requirements, habitability standards, lead paint disclosure, fair housing compliance — the regulatory burden is real and increasing.
Emotional Cost
Late-night maintenance calls, tenant disputes, turnover stress, and the mental load of managing an investment property are real costs that don’t appear on a spreadsheet.
Self-Management vs. Property Management
Self-management saves 8-10% of rent but costs time:
- Marketing and tenant screening: 5-15 hours per vacancy
- Maintenance coordination: 2-5 hours/month
- Rent collection and bookkeeping: 1-2 hours/month
- Lease enforcement and legal compliance: varies
At $1,800/month rent, 8% management = $144/month. If self-management takes 5 hours/month, your effective hourly rate is $28.80. Worth it for some investors, not for others.
Running Your Numbers
Before buying any rental property, build a complete pro forma with every cost category listed above. Use HomeStats data for state-level property tax rates, insurance costs, and trade labor rates (which affect maintenance costs).
The HomeStats state pages show price-to-income ratios and fair market rents, which together indicate whether a state’s rental market supports cash-flow investing or primarily relies on appreciation.
The W-2 Trap covers rental property investing as part of the complete wealth-building framework for W-2 earners, including when rental real estate fits your situation and when other asset classes are a better match.