Published 27 August 2025 | By FJP Investment Editorial Team

Last updated: September 2026

ROI stands for return on investment. It measures the profit or loss produced by an investment relative to the amount of money invested.

The basic formula is:

ROI (%) = net profit ÷ total investment × 100

For example, if an investor commits £100,000 and makes a net profit of £6,000 over one year, the annual ROI is 6%.

The calculation becomes more complicated with property because investors may use different definitions of “profit” and “investment”. One calculation may include mortgage finance and capital growth, while another may consider only rental income and the property’s purchase price.

For any property ROI figure to be useful, it must clearly state:

• which income has been included;
• which costs have been deducted;
• whether mortgage finance has been included;
• whether the result is before or after tax;
• whether capital growth has been included; and
• the period covered by the calculation.

This guide explains how to calculate property ROI, how it differs from rental yield and cash-on-cash return, and which costs investors commonly overlook.

What does ROI mean?

Return on investment shows how much an investment has gained or lost compared with the capital committed to it.

A positive ROI means the investment has produced a profit under the assumptions used in the calculation. A negative ROI means the investor has lost money.

ROI is commonly expressed as a percentage because percentages make it easier to compare investments of different sizes.

Suppose two properties each generate a £10,000 annual profit. If one required £100,000 of capital and the other required £250,000, their financial performance is not equivalent:

• £10,000 profit on £100,000 invested produces a 10% ROI.
• £10,000 profit on £250,000 invested produces a 4% ROI.

The cash profit is identical, but the first investment has produced a higher return relative to the amount invested.

How to calculate property ROI

The general property ROI formula is:

Property ROI (%) = annual net profit ÷ total capital invested × 100

For a property purchased without a mortgage, total capital invested might include:

• the purchase price;
• Stamp Duty Land Tax, Land and Buildings Transaction Tax or Land Transaction Tax;
• legal and conveyancing fees;
• survey costs;
• initial refurbishment;
• furniture and equipment; and
• other costs required to make the property available for letting.

Annual net profit may be calculated by taking the rental income received and deducting the costs of owning and operating the property.

Those costs could include:

• letting and management fees;
• maintenance and repairs;
• insurance;
• service charges and ground rent where applicable;
• licensing and regulatory costs;
• utilities and council tax during vacant periods;
• accounting and professional fees;
• an allowance for vacant periods;
• mortgage interest and finance costs where relevant; and
• other property-specific operating expenditure.

A worked property ROI example

Consider a residential property purchased for £200,000 without a mortgage.

Item	Amount
Purchase price	£200,000
Transaction, legal and survey costs	£15,000
Initial refurbishment	£5,000
Total capital invested	£220,000
Annual rental income	£15,000
Annual operating costs	£4,000
Annual net rental income	£11,000

The annual return based on the total initial investment would be:

£11,000 ÷ £220,000 × 100 = 5%

This produces an annual pre-tax property ROI of 5%, before allowing for any change in the property’s value or future selling costs.

If somebody calculated the return using only the £200,000 purchase price, the result would be 5.5%. That calculation is not mathematically wrong, but it excludes £20,000 of real acquisition and refurbishment expenditure.

This demonstrates why two people can quote different ROI figures for the same property. They may be using different cost bases.

What is the difference between ROI and rental yield?

ROI and rental yield are related, but they are not interchangeable.

Measure	Basic calculation	What it shows
Gross rental yield	Annual rent ÷ purchase price × 100	Rental income before costs
Net rental yield	Annual rent minus operating costs ÷ the defined property cost × 100	Rental performance after specified running costs
ROI	Net profit ÷ total investment × 100	Overall return relative to the capital invested
Cash-on-cash return	Annual pre-tax cash flow ÷ actual cash invested × 100	The return on the investor’s own cash where finance is used
Capital growth	Increase in property value ÷ original value or cost × 100	Change in the property’s value

Gross rental yield is useful for making an initial comparison between properties because it is quick to calculate. However, it does not account for maintenance, management, insurance, vacant periods, service charges or finance.

A property with a high gross yield can therefore produce disappointing cash flow if its costs are also high.

Gross rental yield example

Using the previous example:

• Purchase price: £200,000
• Annual rent: £15,000

The gross rental yield would be:

£15,000 ÷ £200,000 × 100 = 7.5%

However, once £4,000 of annual operating costs and £20,000 of initial acquisition and refurbishment expenditure are considered, the annual return on the total cost becomes 5%.

Both percentages describe the property, but they answer different questions.

How does a mortgage affect property ROI?

Mortgage finance can increase the percentage return on an investor’s own cash when the property performs well. This is known as leverage.

It can also increase losses and financial pressure when rental income falls, costs increase or borrowing becomes more expensive.

Where a mortgage is used, cash-on-cash return can provide a clearer measure of annual cash performance than a simple return based on the property’s full value.

The formula is:

Cash-on-cash return (%) = annual pre-tax cash flow ÷ total cash invested × 100

Leveraged property example

Suppose the same £200,000 property is purchased using mortgage finance:

Item	Amount
Cash deposit	£50,000
Transaction costs and refurbishment	£20,000
Total cash invested	£70,000
Annual rent	£15,000
Operating costs	£4,000
Mortgage interest and finance costs	£4,700
Annual pre-tax cash flow	£6,300

The cash-on-cash return would be:

£6,300 ÷ £70,000 × 100 = 9%

The investor has produced a higher percentage return on the cash committed, but this does not mean the financed purchase is automatically the better investment.

The investor is also exposed to:

• mortgage-rate changes;
• refinancing risk;
• monthly payment obligations;
• lender fees and conditions;
• the possibility of negative cash flow; and
• larger percentage losses if the property’s value falls.

Mortgage capital repayments require careful treatment. They reduce the cash available to the investor but also increase the equity held in the property. Investors should therefore calculate cash flow and growth in equity separately rather than treating the entire mortgage payment as an ordinary operating expense.

Should capital growth be included in property ROI?

Capital growth can be included, but it should be shown separately from rental performance.

Suppose a property purchased for £200,000 is valued at £220,000 three years later. Its estimated capital growth is:

£20,000 ÷ £200,000 × 100 = 10%

That is a cumulative increase over three years. It is not an annual 10% return.

The increase is also unrealised until the property is sold. The eventual sale price may differ from a valuation, and the investor may incur estate agency fees, legal costs, mortgage charges and tax when disposing of the property.

For clear analysis, investors can present returns in three parts:

1. Rental return: income after property operating costs.
2. Cash return: money remaining after operating and finance costs.
3. Capital return: the realised or estimated change in the property’s value.

These figures can then be combined to estimate total return, provided the calculation clearly states whether the capital value is estimated or realised.

Why the timeframe matters

An ROI percentage is incomplete without a timeframe.

A 20% return achieved over one year is very different from a 20% return accumulated over ten years.

When comparing investments held for different periods, an annualised return provides a more meaningful comparison. More advanced investors may use compound annual growth rate or internal rate of return to account for the timing of cash flows.

For a straightforward property review, the most important requirement is consistency. Annual income should be compared with annual costs, while multi-year capital growth should be clearly identified as cumulative or converted into an annualised figure.

What costs should be included in a property ROI calculation?

Leaving out costs can make a weak investment appear more attractive than it is.

Initial acquisition costs

• Purchase price
• Applicable property transaction tax
• Conveyancing and legal work
• Property survey
• Mortgage arrangement and broker fees
• Initial repairs and refurbishment
• Furniture and equipment
• Licensing or registration required before letting

Ongoing ownership costs

• Mortgage interest and finance charges
• Letting and management fees
• Repairs and routine maintenance
• Buildings and landlord insurance
• Service charges and ground rent
• Safety inspections and certificates
• Property licensing
• Accounting and professional services
• Council tax and utilities during vacant periods
• Advertising and tenant-finding costs
• A realistic allowance for voids and arrears
• A reserve for larger future expenditure

Disposal costs

• Estate agency fees
• Legal fees
• Mortgage redemption or early-repayment charges
• Repairs or presentation required before sale
• Applicable tax on the disposal

Taxable property profit and investment ROI are not necessarily the same calculation. HMRC applies specific rules concerning allowable expenses, repairs, capital expenditure and residential finance costs.

Landlords should use current HMRC property income guidance and obtain tax advice appropriate to their ownership structure and circumstances.

Should ROI be calculated before or after tax?

Both calculations can be useful, but they answer different questions.

A pre-tax ROI helps compare the underlying performance of different properties without the investor’s personal tax position affecting the result.

An after-tax ROI provides a more personalised view of the return the investor may retain.

Tax treatment can depend on:

• whether the property is owned personally, jointly or through a company;
• the investor’s residence and tax status;
• the nature of the property and letting activity;
• the treatment of finance costs;
• other income and available allowances; and
• whether the return comes from income or a capital gain.

It is sensible to calculate both figures and label them clearly rather than switching between pre-tax and after-tax numbers.

What is a good ROI for property?

There is no universal percentage that constitutes a good property ROI.

A return should be assessed in relation to:

• the risks involved;
• the amount of borrowing used;
• the reliability of the income;
• the condition and age of the property;
• the time and management required;
• the liquidity of the investment;
• the investor’s holding period;
• the possibility of capital losses;
• alternative uses for the capital; and
• the investor’s objectives and tolerance for risk.

A higher projected return may simply reflect higher risk, greater leverage, weaker tenant demand or substantial management requirements.

Likewise, an apparently modest return from a well-located, low-maintenance property may be more attractive to one investor than a higher but less dependable projection elsewhere.

Before accepting any quoted ROI, ask:

• Is it gross or net?
• Is it based on the purchase price or the investor’s cash?
• Is it before or after finance?
• Is it before or after tax?
• Does it include vacant periods and maintenance?
• Does it assume future capital growth?
• Is it annual or cumulative?
• Is the figure based on actual results or a forecast?

Common property ROI mistakes

Confusing ROI with gross yield

Gross yield excludes most property costs. Presenting it as the investor’s return can materially overstate financial performance.

Ignoring acquisition costs

Transaction tax, legal fees, surveys and initial refurbishment are part of the capital required to acquire the investment.

Using the advertised rent

An asking rent is not necessarily the rent that will be achieved and collected throughout the year. Analysis should allow for realistic rent, vacant periods and possible arrears.

Leaving out maintenance

A property may have a quiet year followed by an expensive roof, heating or structural repair. Using a sensible maintenance reserve produces a more realistic long-term figure.

Assuming capital growth

Property values can rise or fall. Forecast growth should not be presented as though it were guaranteed income.

Mixing annual and cumulative returns

Several years of capital growth should not be added to one year of rental income and described as an annual return without adjusting for the different periods.

Ignoring finance risk

Borrowing can increase the return on cash, but it also increases exposure to interest rates, refinancing and negative equity.

Comparing inconsistent figures

Comparing one property’s gross yield with another property’s after-cost ROI does not produce a meaningful conclusion. The same methodology should be used for every option.

Calculating ROI as an overseas investor

International investors should consider their return in both sterling and their home currency.

A UK property can rise in sterling terms while producing a lower return after an unfavourable currency movement. The opposite can also occur.

Overseas investors may also need to include:

• international transfer and currency-conversion costs;
• additional property management expenditure;
• travel and inspection costs;
• non-resident mortgage pricing and fees;
• the non-UK resident SDLT surcharge where applicable;
• UK tax on rental income;
• home-country tax and reporting obligations; and
• the cost of obtaining advice in more than one jurisdiction.

People living outside the UK may still be liable for UK tax on UK rental income. HMRC’s guidance for landlords living abroad explains the Non-resident Landlords Scheme and related reporting requirements.

Our guide to buying UK property from overseas covers further practical considerations for international buyers.

How often should property ROI be reviewed?

ROI should not be calculated only when a property is purchased.

Investors can review performance at least annually and whenever there is a material change, such as:

• a new tenancy or change in rent;
• mortgage refinancing;
• a major repair or refurbishment;
• new service charges or licensing costs;
• a significant change in the property’s value;
• a change in ownership costs or taxation; or
• consideration of a sale.

An annual review can compare the original forecast with actual rent, costs, occupancy and cash flow. This helps identify whether the investment is meeting its objectives or whether the original assumptions were unrealistic.

Using ROI to compare property investments

ROI is most useful when calculations are consistent.

For each property under consideration:

1. Use a realistic purchase price.
2. Add all acquisition and initial improvement costs.
3. Estimate achievable rent rather than relying solely on an advertisement.
4. Deduct realistic operating costs and void periods.
5. Include finance costs where borrowing is used.
6. Calculate gross yield, net return and cash flow separately.
7. Keep capital growth assumptions separate.
8. Stress-test higher costs, lower rent and periods without a tenant.
9. Use the same calculation method for every property.

Investors building a larger portfolio can read our guide to building a property portfolio and our complete guide to buy-to-let property investment.

Frequently asked questions

What does ROI stand for?

ROI stands for return on investment. It expresses the profit or loss from an investment as a percentage of the money invested.

What is the formula for ROI?

The basic formula is net profit divided by total investment, multiplied by 100. The calculation must clearly define which profits, costs and period have been included.

Is ROI the same as rental yield?

No. Gross rental yield compares annual rent with the property’s purchase price before most costs. ROI normally considers net profit and the total amount invested.

Should mortgage payments be included in ROI?

Mortgage interest and finance charges should normally be considered when measuring property cash flow. Capital repayments require separate treatment because they reduce cash but also increase the owner’s equity.

Does ROI include capital growth?

It can, but rental return and capital growth should be shown separately. Estimated capital growth remains unrealised until the property is sold.

Can property ROI be negative?

Yes. ROI can become negative if rent and capital proceeds are insufficient to cover acquisition, finance, operating and disposal costs.

What is a good property ROI?

There is no universal figure. A return must be considered alongside risk, leverage, liquidity, management requirements, condition, location and the investor’s objectives.

Is cash flow more important than ROI?

They measure different things. Cash flow shows the money remaining after income and cash expenditure during a period. ROI relates profit to the capital invested. Investors should generally examine both.

Should ROI be calculated before or after tax?

It can be calculated on either basis. A pre-tax result can help compare properties, while an after-tax result may better reflect the investor’s personal outcome. The basis should always be stated.

Final considerations

ROI provides a useful way to assess how efficiently an investment is using capital, but the result is only as reliable as the figures included in it.

A realistic property assessment should distinguish between gross rent, net income, cash flow, financing and capital growth. It should also account for transaction costs, vacant periods, maintenance and the possibility that projections may not be achieved.

Rather than asking whether a particular percentage is universally “good”, investors should ask whether the expected return adequately compensates them for the investment’s risks, costs, management requirements and lack of liquidity.

This article is provided for general information only and does not constitute investment, financial, mortgage, legal or tax advice. Calculations are illustrative and do not represent a forecast or guarantee. Property values and rental income can fall as well as rise, and investors may lose money. Appropriate independent professional advice should be obtained before making an investment decision.