Rental and investment guide

How is rental income calculated?

Dividing the monthly rent by the sales price provides a quick first look; but it does not show the actual performance of the investment. Once vacancy time, owner expenses, acquisition costs and initial investment are taken into account, the difference between gross return and net result becomes apparent.

8 minutes readUpdated · July 28, 2026
02

One-minute summary

What to remember before deciding

  • Gross return is used for quick comparison, while net return is used for actual investment performance.
  • In addition to the sales price, add purchase and rental preparation expenses to the total investment.
  • Instead of assuming 12 full months of a year's rent, consider reasonable vacancy and collection risk.
  • Deduct any expenses incurred by the owner, such as dues, maintenance, insurance and taxes, from the net income.
  • A good return is not a single percentage; It is evaluated together with location, liquidity, structure risk and intervention need.
01

Gross rental yield is a quick comparison measure

Gross rental yield ratios the annual rental potential of a property to its sales price. Useful when comparing properties in the same area and of a similar nature for the first time; Since the calculation is easy, it can be applied quickly with ad data.

However, this rate assumes that the house remains uninterruptedly rented throughout the year and there are no expenses. For this reason, it should not be used to make a purchasing decision alone, but to eliminate options to be examined in detail.

Gross rental yield(Monthly rent × 12) ÷ sales price × 100

The gross return period is approximately calculated by dividing the sales price by the annual gross rent.

02

Net return takes into account expenses and actual receipts

In the net account, the denominator is not just the sales price. Title deed and financing transactions, renovations, furniture or preparation investments required before renting are also added to the total investment amount. In the denominator, the remaining expenses incurred by the owner are deducted from the rent expected to be actually collected in a year.

Establishing the account over a calendar year; It makes periodic repair, vacancy and renewal costs visible. If a loan is used, it is necessary to read the return on investment and cash flow separately: while the property appears profitable, the monthly loan payment may strain the cash flow.

Net rental income(Annual collected rent − owner expenses) ÷ total investment × 100

The net payback period is approximately calculated by dividing the total investment by the annual net rental income.

Key distinctionReturn and cash flow are not the same thing.

Net return reflects the performance of the property; Monthly cash flow shows the balance between rent collection and loans and regular payments.

03

Which expenses should be added to the net rent calculation?

Not every expense is the same on every property. Separate the regular usage expenses that belong to the tenant according to the contract and the structural, periodic and tax expenses that fall on the owner. One-time purchase expenses to the total investment; Include recurring expenses each year in annual net income.

The tax consequences of rental income may vary depending on the person's other income, the chosen expense method and current exemption limits. Instead of ignoring the tax effect on the net account, up-to-date Revenue Administration explanations for the personal situation and a financial advisor's evaluation should be used when necessary.

  • Idle time and risk of non-collection
  • Owner's dues, common expenses and periodic maintenance
  • Insurance, property tax and rental income tax depending on personal situation
  • Painting, cleaning, repair and marketing expenses when changing tenant
  • Purchase expenses and renovation or furniture investment before renting
04

Compare gross and net account on the same example

The example below is just to illustrate the method; It is not market value or investment advice.

Assuming a sales price of 8,000,000 TL and a monthly rent of 35,000 TL, the annual gross rent will be 420,000 TL and the gross return will be 5.25 percent. However, when 400,000 TL purchase and preparation expenses, one month of vacancy per year and 30,000 TL owner expenses are added, the result changes.

In this scenario, the total investment is 8,400,000 TL; The expected collection is 385,000 TL and the annual net rental income is 355,000 TL. The net return is approximately 4.23 percent and the net return period is approximately 23.7 years. The most valuable aspect of the calculus is not that it produces a single result, but that it shows how much each assumption changes the result.

Sample rental income calculation
PenGross overviewClear scenario
Sales / total investment8,000,000 TL8.400.000 TL
Annual rent420,000 TLCollection of 385,000 TL
Annual owner's expenseNot included30,000 TL
Annual net income420,000 TL355,000 TL
Yield5.25%Approximately 4.23%
ReturnApproximately 19 yearsApproximately 23.7 years
05

What should be a good rental income?

There is no single best rate for every region, building type and investor. High apparent return; It may carry long idleness, need for maintenance, low liquidity or structural uncertainty. A property with a lower rate may be more predictable, with stable demand, limited intervention and easy re-letting.

The correct comparison is to calculate similar options in the same region with the same assumptions. Run the rent scenario in three separate states: optimistic, balanced and cautious; The decision should not be based solely on the best outcome.

  • Similar size and building quality in the same microdistrict
  • Realizable rent and release period
  • Upcoming renovations, common expenses and building age
  • Ease of sales and breadth of target tenant audience
  • The impact of plan, light and usage quality on tenant demand
Sanem's architectural perspectiveRental value is determined not only by location but also by livability.

Well-functioning layout, natural light, storage and well-maintained common areas; It should be evaluated in terms of preference among similar advertisements and tenant continuity.

Frequently asked questions

Clear, concise answers

01Are rent multiplier and depreciation period the same thing?

Although it is used in close meanings in daily use, it should be stated which rents and costs are taken into account. Gross return includes only the sales price and gross rent; net return uses the total investment plus income after expenses.

02How should idle time be assumed?

Instead of a single standard, the rental rate in the region, the target audience of the property and past tenant changes should be taken into consideration. It is healthier to see the result with different gap assumptions, including optimistic, balanced and cautious.

03Should rental income tax be included in the net return?

The tax burden depending on your personal situation affects the net cash flow. Since exceptions and expense methods may change, it should be calculated separately with current Revenue Administration information and, when necessary, the opinion of a financial advisor.

How is rental income calculated? | Sanem Coşan Acar