An apartment can be an investment, but the numbers must work
An apartment may suit an investor who can fund the purchase, manage the property and hold it through vacancies or a slow sale. It is less compelling when the plan depends on full occupancy, rising prices or rent covering every loan payment without a reserve.
Assess the exact unit, building and purchase price. A popular location or attractive development does not establish a good return. Separate rental income, operating costs, financing and the eventual sale before deciding whether the commitment fits your finances.
Editorial review: 28 September 2026. All worked figures below are hypothetical, not current Colombo prices, rents, tax estimates or return forecasts. This is a framework for evaluating a property, not a recommendation to buy.
Establish a realistic rent before calculating a yield
Compare similar units in the same building or nearby developments, with comparable size, furnishings, parking and condition. Distinguish advertised rent from evidence of rent actually agreed. Ask how long comparable homes took to let and what concessions were needed.
Decide whether your plan is a long-term tenancy or short stays. They have different vacancy, cleaning, furnishing and management demands. Check building rules, applicable permissions and tax requirements for the intended use rather than assuming a residential apartment can operate in any way you choose.
If a seller offers a rental guarantee, have an independent adviser examine who owes the payment, the conditions, deductions, duration and what happens if the provider cannot pay. A guarantee is a contract to assess, not evidence that the market rent is sustainable.
Gross yield is only the starting calculation
Gross rental yield divides annual rent before expenses by the purchase price. Suppose an apartment costs LKR 40 million and the assumed rent is LKR 180,000 per month. Twelve months of rent would be LKR 2.16 million, giving a gross yield of 5.4%.
That assumes every month is paid and excludes purchase costs, vacancies, repairs, management, finance and tax. To compare the income against all the money required for the property, also calculate a yield using the total acquisition and setup cost. Keep the denominator consistent when comparing listings.
A worked example after vacancy and operating costs
Continue with the hypothetical LKR 40 million purchase and assume LKR 3 million in transaction and initial setup costs. Total acquisition cost is LKR 43 million. The following annual budget assumes one vacant month and LKR 180,000 monthly rent for the other eleven months.
| Illustrative annual item | Amount |
|---|---|
| Rent collected: LKR 180,000 × 11 | LKR 1,980,000 |
| Owner-paid condominium charges | − LKR 300,000 |
| Repairs and replacement allowance | − LKR 120,000 |
| Letting and property management | − LKR 120,000 |
| Insurance and other owner costs | − LKR 60,000 |
| Income after these allowances, before finance and tax | LKR 1,380,000 |
Borrowing changes your cash flow and risk
Using the same example, assume loan payments total LKR 1.8 million a year. After the LKR 1.38 million budgeted property income, you would need to contribute another LKR 420,000 annually, or LKR 35,000 per month on average, before tax. The assumed loan payment is an illustration, not a bank quotation.
The full repayment belongs in your cash-flow budget, even though any principal component reduces your debt. For an investment-return analysis, separate principal from interest and use the remaining debt when modelling a sale. Do not treat principal repayment as both an expense and another deduction from sale proceeds.
Obtain the actual lender schedule, fees, fixed-rate period or repricing terms and early-settlement conditions. Test whether you can meet the payments with no rent coming in for a period. Leverage can increase losses as well as gains on the cash you invested.
Test a less favourable year
These are separate stress cases, not predictions. Also test a lower rent, late payment, an unexpected internal repair and higher loan payments where your rate can change. Keep enough accessible funds for the obligations you would still face.
| Change to the example | Effect, with other assumptions unchanged |
|---|---|
| Three vacant months instead of one | Rent falls by LKR 360,000; budgeted income falls to LKR 1,020,000 before finance and tax |
| An extra LKR 500,000 building contribution | Budgeted income falls to LKR 880,000 before finance and tax |
| Both events occur | Budgeted income falls to LKR 520,000 before finance and tax |
Inspect the building and plan the exit
Review title, approvals, condition, management accounts, arrears and planned major works with independent advisers. A repair bill or a restriction on the use you intended can change the investment case even if the initial rent estimate is sound.
For resale, model the amount left after selling costs, any applicable taxes and the outstanding loan. Include a period of continued ownership costs while the property is on the market. An advertised asking price is not a completed sale, and an apartment cannot necessarily be sold quickly at your preferred price.
Compare the result with other uses of your money using the same holding period, tax basis and risk assumptions. Consider how much of your wealth would depend on one property, one tenant market and one location. If you measure your wealth in another currency, include exchange-rate scenarios too.
Use market reports and tax advice for the right questions
The Central Bank of Sri Lanka publishes condominium market surveys and property-price indices. Read each report's period, sample and coverage. An index can describe changes in a market measure; it cannot establish the rent, resale value or future return of your apartment.
Ask a tax adviser how rental income, deductible expenditure, withholding obligations and a future disposal apply to your status and ownership structure. The Inland Revenue Department publishes guidance on gains from investment-asset disposals. Do not assume all costs are deductible or apply a historical rate without checking the relevant year and transaction.
Your investment decision checklist
An apartment is worth considering when its evidence, cash requirements and risks fit your circumstances. If the case only works with perfect occupancy or strong price appreciation, revise the assumptions before making a commitment.
- Purchase price and complete acquisition costs are documented.
- Rent assumptions are supported by comparable evidence.
- Vacancy, repairs, management and building costs are included.
- Cash flow remains manageable under less favourable conditions.
- Legal, technical, financing and tax questions are resolved.
- The expected holding period and exit costs fit your plans.
- You have compared alternatives and retained an accessible reserve.
Frequently asked questions
What is a good rental yield?
There is no universal target. Compare a consistently defined yield with the property's risks, work required, financing, tax and alternative uses of your money. A high advertised gross yield can hide substantial costs.
Is positive rental income the same as positive cash flow?
No. Deduct owner costs, loan payments and applicable taxes to understand the cash remaining. Plan for the timing of bills and vacancies as well as annual averages.
Are apartments guaranteed to appreciate?
No. Location, building condition, supply, demand and wider financial conditions can affect resale. Model unchanged and lower sale values as well as an increase.
Should I include principal repayments as an expense?
Include them when testing whether you can afford the cash payments. In a return calculation, principal reduces debt; distinguish it from interest and avoid counting it twice when you calculate sale equity.
Can I use these examples to decide what to buy?
Use the method, not the invented figures. Replace every assumption with property-specific evidence, actual financing terms and appropriate professional advice.
