How to calculate the return (ROI) of an investment in a rental flat?

Buying a flat to rent is a popular way to invest money. But before you make a decision, it's worth asking yourself a key question: how do you know if it will really pay off?

This is where profitabilityor ROI (Return on Investment). It is a simple but extremely effective tool that shows you in percentage terms the return on your investment. It will help you to stop relying on guesswork and start making decisions based on concrete data.

Proper calculation of ROI will help you avoid costly mistakes and consciously choose the best property. In this article, we will take you through the whole process step by step. You will learn how to calculate the yield correctly, what costs you need to take into account and how to manage your investment effectively.

What is profitability (ROI) and why is it important to know it?

Return on investment, known as the ratio ROI (Return on Investment), is the most important parameter that will tell you whether your investment in a flat is profitable. In simple terms, ROI shows what percentage of the money you put in comes back to you as a pure profit over a specific period of time, most often a year.

Why is this so important? Knowing the ROI allows you to:

• Compare different properties and choose the one with the highest earning potential.
• Make informed decisions, based on numbers rather than intuition.
• Predict how long it will take to recoup the investment and will begin to generate a satisfactory income.

Treat ROI as your financial compass. It takes into account both rental income and all the costs of maintaining the property, making it an extremely practical tool for anyone who wants to multiply their capital wisely.

What costs and revenues to take into account when calculating rental profitability?

To make your calculations reliable, you need to take into account every expense, even the smallest ones. It is easy to focus on the monthly rent, but this is only part of the financial puzzle. The key to success is a reliable breakdown of all costs and income.

Your analysis should include one-off costsrelated to the preparation of the flat, and fixed costs, incurred regularly during the rental period.

Type of financial flow	Examples
Costs (expenditure)	Real estate purchase price, PCC tax, notary's fee, commission for the office, cost of renovation and equipment, furniture and white goods, monthly rent to the cooperative or community , utility charges (if they are on your side), property insurance, rent tax, costs of minor repairs and maintenance, expenses for servicing the mortgage (capital and interest instalments) , costs of periods without a tenant (vacancy).
Revenue	Monthly rent paid by tenant.

Remember that omitting any of these items can significantly distort the result and lead to erroneous conclusions. The more accurate your list is, the more precise your ROI will prove to be.

ROI formula - how to calculate the return on investment step by step?

Calculating ROI is simpler than you might think. Just stick to a proven formula and follow the steps below.

Formula for annual ROI:
(Annual rental income - Annual costs) / Total investment cost x 100%

Let us analyse this step by step with a concrete example:

Step	Description	Example
1. Calculate annual revenue	Add up all rent receipts over the year.	12 months x £2,500 = PLN 30 000
2. calculate the annual costs	Add up all fixed costs (administrative rent, taxes, insurance, minor repairs).	12 months x £800 = PLN 9600
3. calculate the annual profit	Subtract annual costs from annual revenue.	£30,000 - £9600 = PLN 20400
4. Determine the total cost of the investment	Add up the purchase price of the flat and all one-off expenses (renovation, notary, taxes).	£400,000 (purchase) + £50,000 (start-up costs) = PLN 450000
5. calculate the ROI	Divide the annual profit by the total investment cost and multiply the result by 100%.	(£20400 / £450000) x 100% = 4,53%

In this case, the annual rate of return (ROI) is 4,53%. With such calculations, you can easily compare the profitability of different flats and choose the one that offers the best return on invested capital.

Don't have time to handle your tenancy? Find out more about management with guaranteed rent payment

Tenancy management is a full-time job. Searching for tenants, verifying their reliability, keeping an eye on timely payments, rectifying faults - all this takes time, energy and expertise. What's more, there is always the risk of payment problems or periods when the flat stands empty and does not earn money.

If you value your peace of mind and want to enjoy your investment exclusively passive income, the ideal solution is professional tenancy management. It's a service that takes all the responsibilities of handling your property off your hands.

Particularly noteworthy is the option with guarantee of payment of rent. It ensures that you receive regular income in your account every month, regardless of whether the tenant has paid on time or the flat is temporarily empty. The management company takes on all the risk, providing you with:

• Fixed and predictable income throughout the duration of the contract.
• Professional selection and vetting of tenants, which minimises the risk of problems.
• Full technical support and administration of the property.

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What is worth remembering?

Investing in rental housing can be extremely lucrative, but the key to success is to undertake a informed and considered decisions. Before investing your savings, take the time to carefully calculate your return on investment (ROI). It is the numbers, not emotions, that should be your main advisor.

Remember to take into account all costs - From the purchase price, to renovations, to ongoing fees and taxes. Only then will you get a realistic picture of how much your property will be able to earn.

If, on the other hand, you value convenience and want to avoid the hassle of managing a tenancy, consider enlisting the help of professionals. Service tenancy management with rent guarantee is the certainty of a steady income and peace of mind, making your investment a truly passive source of profit.