⚙ Interactive calculator — use inputs above to calculate instantly.
Enter values above to calculate
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⚙ Interactive calculator — use inputs above to calculate instantly.
Rental property return has multiple dimensions — cash flow, cap rate, and cash-on-cash return each tell a different story. A property can be cash flow negative but still a strong investment if appreciation is high. This calculator shows all three metrics to give a complete picture of investment performance.
Cap Rate = Net Operating Income / Property Value. Ignores financing. Measures property performance on its own. US average: 5-8%. Under 5% in expensive markets like NYC, SF, LA.
Cash-on-Cash Return = Annual Cash Flow / Total Cash Invested. Accounts for financing. Shows actual return on your invested dollars.
Cash Flow = Monthly Rent - Mortgage - Taxes - Insurance - Vacancy - Maintenance - Management.
| Metric | Example ($400K Property, $2,500/mo rent) | Good Range |
|---|---|---|
| Cap Rate | 5.25% | 5-8%+ |
| Cash-on-Cash | 4.8% (with 25% down) | 6-12%+ |
| Monthly Cash Flow | -$180 (slightly negative) | $200+ positive |
The 1% rule: monthly rent should be at least 1% of purchase price. A $300,000 property should rent for $3,000/month. In expensive markets, 0.5-0.7% is more realistic. The 1% rule ensures enough rental income to cover mortgage, taxes, insurance, and maintenance. Properties failing the 1% rule typically produce negative cash flow unless there is exceptional appreciation potential.
Vacancy: Budget 5-8% (1 month/year). Maintenance: 1% of home value annually = $4,000/year on a $400K property. CapEx reserves: $150-300/month for roof, HVAC, appliances. Property management: 8-12% of gross rent if not self-managing. When all these are included, most properties that look profitable on paper break even or lose money in practice.
Use this calculator as a starting point, not a final answer. Run three scenarios: pessimistic (lower returns, higher costs, worst-case tax rates), base case (your expected scenario), and optimistic (favorable conditions). The range between these three scenarios tells you how much uncertainty surrounds your plan and how much buffer you need.
Once you have your numbers, cross-reference them with complementary calculators. A mortgage payment should be checked against your overall budget and DTI ratio. A retirement projection should account for Social Security income, potential pension, and healthcare costs in retirement. Tax calculations should be checked against available deductions and credits you may qualify for. No single calculator captures everything.
Where you hold investments matters as much as what you hold. High-growth assets belong in Roth accounts where growth is tax-free. Income-producing assets like bonds belong in traditional 401(k) or IRA where taxes are deferred. Tax-managed index funds belong in taxable brokerage where you can harvest losses. This asset location strategy adds 0.2-0.4% annually to after-tax returns without changing your investments at all.
The lifetime value of proper tax planning for a median American household is approximately $150,000-300,000 in additional wealth at retirement — the difference between tax-smart and tax-naive investment management over 30 years. Most of this benefit comes from three decisions made once: choosing the right account types, maximizing employer match, and selecting low-cost index funds.