Rental Property Calculator

Know your numbers before you sign the lease agreement. Cash flow, cap rate, yield – all in one place.

Rental property calculator — cap rate, cash flow and yield analysis

Property Details

Tax, insurance, maintenance, mgmt
Monthly Cash Flow
Gross Yield
Net Yield
Cap Rate
Cash-on-Cash ROI

Monthly Breakdown

Effective Rent (after vacancy)
Mortgage Payment
Operating Expenses
Net Cash Flow
NOI = Rent − Expenses  |  Cap = NOI / Value
Net Operating Income and Cap Rate are the foundation of every landlord's analysis
Gross Yield

Gross Rental Yield

Annual rent ÷ property value. A quick comparison metric — does not account for costs

Net Yield

Net Rental Yield

(Rent − Expenses) × 12 ÷ property value. More accurate than gross — includes all operating costs

Cap Rate

Capitalisation Rate

NOI ÷ property value. Compare properties independent of financing structure

CoC ROI

Cash-on-Cash Return

Annual cash flow ÷ cash invested. Measures actual return on your down payment

Cash Flow First

Four Metrics Every Landlord Must Know

Cap rate, gross yield, cash-on-cash return, and NOI. A property that looks attractive at first glance can destroy wealth once you factor in management fees, maintenance, void periods, and financing. Calculate all four before you commit.

Reading Your Rental Numbers

Positive monthly cash flow is the holy grail — the property pays for itself and generates income. But in high-price markets (San Francisco, London), negative cash flow is common. Investors accept this when they expect strong capital appreciation to compensate over 10+ years.

The 1% rule (US) states monthly rent should be ≥ 1% of purchase price. A $300k property should rent for $3,000/month. This rule is rarely achievable in premium markets but remains a useful screening filter for cash-flow-first investors.

Stress-test first: Always model what happens if the interest rate rises 2–3% and vacancy doubles. If the property still survives financially in that scenario, it's a robust investment.

What Is a Good Rental Yield?

🇺🇸 United States — Net yield 5–8%

Midwest and South markets offer highest yields (7–10%). Coastal cities (NYC, LA, SF) typically yield 2–4% gross. Cap rates of 5–7% are broadly acceptable for residential.

🇬🇧 United Kingdom — Gross yield 5–7%

UK net yields after all costs: 3–5%. Northern England and Scotland often yield 6–8% gross; London typically 3–4%. High yield = higher management intensity or lower capital growth expectation.

🌏 AU / CA — Net yield 3–5%

Australia and Canada have seen prices surge relative to rents. Gross yields in major cities often 2–4%. Regional markets offer better yields. Negative gearing is common and tax implications vary significantly.

Frequently Asked Questions

Gross yields of 5–8% are generally considered solid. Net yield (after all costs) is more important — aim for at least 4–5% net. City centres may yield 3–4% gross; some regional markets reach 8–10%. High yield often correlates with higher management intensity or lower capital growth.
Mortgage interest, agency fees (8–15% of rent), maintenance (1–2% of property value/year), insurance, ground rent/service charges, void periods (1–2 months/year), and potential legal costs. Most new landlords underestimate these by 30–50%.
Cash-on-cash ROI = (Annual net cash flow) / (Total cash invested) × 100. Total cash invested = deposit + closing costs + any refurbishment. For total return, also add capital appreciation. Both metrics matter for a complete picture.
The US 1% rule: monthly rent ≥ 1% of purchase price. On a $300,000 property, that's $3,000/month. This equates to a 12% gross yield — rarely achievable in premium markets. Use it as a screening filter, not an absolute rule.
With a $60k deposit on a $300k property, a 10% appreciation creates a 50% return on cash — before rental income. But a 20% price fall destroys your entire deposit. Always stress-test at mortgage rates 2–3% above current and double the vacancy rate.
Budget for 1–2 months of vacancy per year — roughly an 8–17% reduction in gross rental income. Maintain a cash reserve of 3–6 months of mortgage payments to cover periods between tenants and unexpected repairs.
Management fees (8–12% of rent) cost about $2,400/year on $2,000/month rent. Worth it if you live far from the property, have a full-time job, or own multiple properties. Self-management saves money but costs time — and mistakes can be expensive.
At 6–7% mortgage rates, cash flow has become negative in many markets previously profitable at 2–3% rates. Profitability now requires: larger deposits (25–35%), high-yield locations, or accepting short-term negative cash flow in exchange for long-term appreciation.

Formula & Calculation Method

Gross Rental Yield

Gross_Yield = (Annual_Rent / Property_Value) × 100%

Net Rental Yield

Net_Yield = ((Annual_Rent − Annual_Expenses) / Property_Value) × 100%
  • Annual_Expenses — Management + maintenance + insurance + property tax + vacancy allowance

Cap Rate (Capitalization Rate)

Cap_Rate = NOI / Property_Value × 100%
  • NOI — Net Operating Income (rent − operating expenses, excluding mortgage)

Source: Standard CRE valuation (Appraisal Institute)

Cash-on-Cash Return

CoC = Annual_Cash_Flow / Total_Cash_Invested × 100%

Authoritative Sources & Standards

  • IRS: IRS Publication 527 — Residential Rental Property. Depreciation: 27.5 years straight-line for residential, 39 years for commercial. Passive activity loss rules limit deductions for non-real-estate-professionals. → IRS

Expert Insights & Research

The 1% rule of thumb: monthly rent should equal at least 1% of purchase price. In 2024, only 19% of US metros meet this threshold (Zillow analysis), compared to 67% in 2010.

— Zillow Research / BiggerPockets 2024 Market Analysis (2024)

Real estate's long-term return (1928–2023) is approximately 4–5% real (inflation-adjusted), compared to 6–7% for S&P 500. Leverage amplifies returns but also losses (Robert Shiller, Yale).

— Shiller, R. — Online historical home price index (Yale) (2023)

For informational purposes only — not financial, medical, or legal advice. Results are estimates; use at your own risk. Full terms