US Rental Property ROI Calculator

Whether you're analyzing your first single-family rental or adding a fifth unit to your portfolio, the numbers have to work before you write a check. This calculator gives you every metric serious investors track — NOI, cap rate, cash-on-cash return, DSCR, and annualized ROI — all from a single set of inputs.

Why Rental Property Analysis Matters

Most people who lose money in real estate didn't run bad properties — they ran bad numbers before buying. Paying $10,000 too much for a property, underestimating vacancy, or missing a $200/month expense item can turn a promising investment into a cash-flow negative headache. A disciplined analysis framework protects you.

The metrics below are the same ones used by institutional investors, lenders, and platforms like BiggerPockets and LoopNet. Understanding each one — and the healthy ranges — is the foundation of smart rental investing.

Net Operating Income (NOI)

Formula: NOI = Effective Gross Income − Total Operating Expenses

Effective Gross Income (EGI) is your annual gross rent adjusted for vacancy. If you collect $2,200/month but expect a 5% vacancy rate, your EGI is $2,200 × 12 × 0.95 = $25,080.

Operating expenses include property taxes, insurance, HOA fees, property management, routine repairs, capital expenditure (CapEx) reserves, and utilities you pay. They do not include mortgage payments — that's a financing cost, not an operating expense.

NOI is used by lenders and appraisers because it reflects the income-producing power of the asset independent of how it's financed. A property with a $15,000 NOI is worth approximately $150,000–$375,000 depending on the market (see Cap Rate below).

Cap Rate

Formula: Cap Rate = (NOI / Purchase Price) × 100

The capitalization rate tells you the unlevered return on the asset. A 6% cap rate means the property generates 6 cents of NOI for every dollar of value. Cap rates vary significantly by:

• Market: Dense coastal cities (San Francisco, Manhattan) often see cap rates of 3–5%. Midwest and Sun Belt markets may run 6–10%.
• Asset class: Single-family rentals, small multifamily, and commercial properties trade at different cap rates.
• Condition and age: Newer, well-maintained properties command lower (tighter) cap rates.

According to Mynd, a typical healthy cap rate for single-family rentals in most US markets ranges from 5% to 8%. Below 4% is generally considered a speculative appreciation play.

Cash-on-Cash Return

Formula: Cash-on-Cash = (Annual Cash Flow / Total Cash Invested) × 100

This is the metric most individual investors care about most because it measures the actual cash yield on the money you put in (down payment + closing costs + rehab). Unlike cap rate, it accounts for your specific financing terms.

• Good range: 8–12% is generally considered strong for residential rentals (per BiggerPockets).
• Below 6%: May still work in high-appreciation markets, but the cash flow buffer is thin.
• Negative: The property is costing you money every month — only acceptable with a very clear appreciation thesis.

Cash-on-Cash is a pre-tax metric. For the after-tax version factoring in depreciation, see our Rental Property After-Tax Cash Flow Calculator.

Debt Service Coverage Ratio (DSCR)

Formula: DSCR = NOI / Annual Debt Service

DSCR is the metric your lender cares most about. It answers: does the property's income cover the mortgage payments?

• DSCR ≥ 1.25: Most conventional investment property lenders require this minimum. It means NOI covers debt payments with a 25% cushion.
• DSCR 1.0–1.24: Marginal. Some portfolio lenders will approve this, but terms may be less favorable.
• DSCR < 1.0: The property cannot service its debt from operating income alone. Most lenders will not finance this.

DSCR-based loans (no income verification) have become popular for rental investors. Lenders like Kiavi, Lima One, and others offer these products, with 1.25 as the standard minimum.

Simple ROI and Annualized ROI Over the Holding Period

These two metrics capture the total return over your planned investment horizon, combining cash flows and appreciation.

Simple ROI adds up all projected annual cash flows over the holding period and adds the expected appreciation gain, then divides by total cash invested.

Annualized ROI converts that simple ROI into a per-year figure using compound growth math, making it comparable to stock market returns. A 50% simple ROI over 5 years equals roughly 8.45% annualized — not the same as 50%/5 = 10%.

According to Wall Street Prep, annualized ROI is the correct metric for comparing real estate investments to equities, bonds, or other asset classes.

How to Use This Calculator

1. Enter your purchase details — price, closing costs, rehab budget, down payment, and loan terms.
2. Fill in income and expense assumptions — use realistic market rent and don't skip vacancy or CapEx.
3. Set your holding period and appreciation rate — be conservative; 2–3% annually is reasonable for most markets.
4. Review the results — check that DSCR is ≥ 1.25, cash-on-cash is in your target range, and monthly cash flow is positive before proceeding.

A common mistake is using optimistic assumptions to make a deal "work" on paper. Test your numbers with a 10% vacancy rate and 10% repairs budget to see how the deal holds under stress.

Common Expense Estimates

If you're not sure what to budget, here are typical ranges:

What This Calculator Does Not Include

• Tax effects: Depreciation, mortgage interest deduction, and passive loss rules can significantly change your after-tax return. Use the Rental Property After-Tax Cash Flow Calculator for a tax-adjusted view.
• Selling costs: When you sell, you'll pay 5–6% in agent commissions plus closing costs, which reduces your appreciation gain.
• Financing changes: This model assumes a fixed-rate mortgage. ARMs or bridge loans would require different analysis.
• Debt paydown: As you pay down principal, your equity increases — this is a return component not captured in cash-on-cash.

Next Steps

Once you've run the numbers and the deal looks promising, consider these next steps:

1. Get pre-approved for an investment property loan so you know your actual rate and terms.
2. Order an inspection to validate your repair and CapEx assumptions.
3. Research rental comps on Zillow, Rentometer, or local property management companies to confirm your rent estimate.
4. Consult a CPA familiar with rental real estate to understand your specific tax situation.

For a step-by-step guide to analyzing rental properties using these metrics, read How to Analyze a Rental Property (Cap Rate, Cash-on-Cash, DSCR).

Sources: BiggerPockets, Mynd Property Management, LoopNet Market Trends, Wall Street Prep Real Estate Finance.