Property Investment Calculator
Buy-to-let total return.
Calculate property investment ROI from price, deposit, rent, expenses, appreciation, and holding period — the standard buy-to-let return number.
What this tool does
Property investment ROI combines rental income with property value growth over your holding period. The calculator takes your property price, initial deposit, monthly rental income, monthly operating costs, expected annual appreciation rate, and investment timeframe to model total returns. The result shows cumulative ROI as a percentage of your deposit, alongside cash-on-cash return from net rental flows. The final property value reflects compounded annual appreciation applied to the purchase price. Monthly expenses and rental income have the most direct impact on year-to-year cash returns, while appreciation rate and holding period shape long-term value gains. This tool models a straightforward buy-and-hold scenario and does not account for financing costs, tax treatment, vacancy periods, or capital expenditure beyond routine maintenance.
Enter Values
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Formula Used
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Calculations or display — let us know.
Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
Property investment ROI combines rental cash flow and property appreciation. Total return = total rental income + appreciation gain. ROI calculated against deposit (initial cash invested), not full property price - leveraged returns. Buy-to-let typical ROI: 8-15% annually including appreciation, 3-5% pure rental yield.
300k property, 75k deposit, 1,500/month rent - 400 expenses = 1,100 net = 13,200/year. Over 10 years: 132k rental + appreciation 100k (3% pa) = 232k total return. ROI on 75k deposit: 309%. Strong returns from leverage. Without mortgage (cash purchase): much lower ROI percentage but lower risk.
Buy-to-let economics tightened post-2017: mortgage interest tax relief restricted, Stamp Duty surcharge 3%, capital gains tax higher than primary residence. Despite these, properties in growing areas still deliver double-digit ROI through combined cash flow and appreciation. Locations matter enormously - some areas deliver 15%+ annual returns, others negative.
Run it with sensible defaults
Using property price of 300,000, deposit of 75,000, monthly rent of 1,500, monthly expenses of 400, the calculation works out to 313.57%. The defaults are meant as a starting point, not a recommendation.
The levers in this calculation
The inputs — Property Price, Deposit, Monthly Rent, Monthly Expenses, and Annual Appreciation % — do not pull with equal force. The rate and the time horizon usually dominate — compounding means a small change in either reshapes the final figure more than a similar shift in contribution size. Test this by doubling one input at a time.
How the math works
Net rental = (rent - expenses) × 12 × years. Appreciation = price × (1 + rate)^years - price. ROI = (rental + appreciation) ÷ deposit × 100.
Why investors run this
Most people's intuition for compounding is wrong — not because the math is hard, but because linear thinking doesn't account for curves. Running numbers through a calculator like this one is the cheapest way to recalibrate that intuition before making an irreversible decision about contribution rate, asset mix, or retirement age.
What this doesn't capture
Steady-rate math ignores real-world volatility. Actual returns are lumpy; sequence-of-returns risk matters most in drawdown; fees and taxes drag on compound growth; and behaviour changes in drawdowns can reduce outcomes below the projection. The number represents one scenario rather than a forecast.
££300,000 with ££75,000 deposit, ££1,500/mo rent, 3% × 10y = 313.57%.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
The calculator computes return on investment by combining two return sources over your holding period. Net annual rental income is calculated as monthly rent minus monthly expenses, multiplied by 12 months and the number of years held. Property appreciation is modelled using compound growth, applying the annual appreciation rate to the property price over the full holding period. Total return combines accumulated net rental income and appreciation gain, then divides by your initial deposit and converts to a percentage. The model assumes a constant monthly expense level, consistent annual appreciation rate, and rental income received throughout the period. It does not account for transaction costs, ongoing maintenance variability, tax on gains or rental income, financing costs, vacancy periods, or market volatility.
Frequently Asked Questions
Is leverage worth it?
Hidden BTL costs?
Which markets best?
Tax considerations?
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