Calculate Rental Profitability: A Guide for Property Managers and Landlords

Problem: More and more owners are asking their property management companies: "Is renting out still worth it?" The uncertainty is real – increased financing interest rates, higher maintenance costs, and regulatory requirements have fundamentally changed the calculation.

Thesis: The question "Is renting worth it?" can be answered – but only with numbers, not with a gut feeling. As a property manager, you can provide your owners with concrete added value that significantly strengthens customer loyalty.

The three yield metrics at a glance

Before any calculation, the question arises as to which metric actually provides the correct answer. In the practice of real estate consulting, three metrics have established themselves:

Direct answer: Gross rental yield shows the rough return on the purchase price excluding costs. The net rental yield deducts ongoing costs and is the most meaningful metric for actual profitability. The return on equity measures how effectively the equity used is actually working, taking financing into consideration.

Those who only know the gross rental yield often overestimate the return by several percentage points – enough to consider an unprofitable investment profitable.

Gross rental yield: Quick orientation

The gross rental yield is the simplest metric and is most frequently communicated in listings and property brochures:

Formula: Gross rental yield = (annual cold rent / purchase price incl. ancillary purchase costs) × 100

What is included – and what is not

• included: annual cold rent, purchase price, ancillary purchase costs (property transfer tax, notary, agent)

• not included: management costs, maintenance, loss of rent, financing interest

The gross rental yield is suitable for a quick comparison of different properties. For a real decision of "rent or sell", it is too superficial.

Net rental yield: The realistic metric

The net rental yield takes into account all ongoing costs that cannot be passed on to the tenants. This brings it much closer to the actual result.

Formula: Net rental yield = ((annual cold rent – non-recoverable costs) / total investment) × 100

Which costs are included?

• Management costs (property management, special property management)

• Maintenance reserve and ongoing maintenance

• Risk of rent loss (usually 2–5% of the annual cold rent)

• non-recoverable service charges (part of the administration, bank and account management fees)

Rule of thumb: In practice, the net rental yield is often 1 to 2 percentage points below the gross rental yield. For old buildings or properties in need of intensive renovation, the difference can be significantly larger.

Return on equity: How well is your money working?

The net rental yield describes the total investment. For owners who finance the rental with a loan, another question is often more important: What is the rate of return on the equity I have used?

Formula: Return on equity = ((annual cold rent – non-recoverable costs – interest) / equity used) × 100

The so-called leverage effect can leverage the return on equity: If the net rental yield is above the borrowing interest rate, the return on equity rises as the financing share increases. If it is below, the opposite happens – and this is exactly where the difficult calculation begins for many existing properties since the interest-rate turnaround.

Worked-out example: Three-room apartment in a major German city

Anonymized scenario for illustrative purposes. All figures are rounded and exemplary.

Initial data:

• Purchase price: €420,000

• Ancillary purchase costs (approx. 11%): €46,000

• Total investment: €466,000

• Monthly cold rent: €1,200

• Annual cold rent: €14,400

Gross rental yield: €14,400 / €466,000 × 100 = 3.09%

Non-recoverable ongoing costs (year):

• Property management (special property management + HOA management): €480

• Maintenance reserve: €1,200

• Risk of rent loss (3%): €432

• non-recoverable service charges: €250

• Total: €2,362

Net rental yield: (€14,400 – €2,362) / €466,000 × 100 = 2.58%

Return on equity (Assumption: €100,000 equity, €366,000 loan at 3.8%):

• Interest p.a.: €366,000 × 3.8% = €13,908

• Cash flow after interest: 14,400 – 2,362 – 13,908 = –€1,870

• Return on equity: –1.87%

Direct answer: In this example, renting out – after all ongoing costs and financing interest – generates a negative cash flow. The investment is not unprofitable per se (increase in value and debt repayment gain still apply), but it is not sustainable from ongoing income.

Reducing loss of rent

Consistent dunning procedures, professional tenant searches, and clean handover processes reduce the average vacancy time. Each month of vacancy avoided corresponds to around 0.25 percentage points of gross rental yield (with a monthly rent of €1,200 and a purchase price of €420,000). Why renting out often is economically worthwhile after all and where the process makes the difference is explained in our article Why renting is no longer worth it – or is it?.

Structuring maintenance costs

A property management company with professional maintenance management lowers contractor costs through framework agreements, bundles orders, and avoids expensive emergency call-outs. In practice, double-digit percentage savings are realistic.

Increasing billing quality

Legally secure, automated service charge statements prevent refunds and disputes – and that is no minor detail: every shortfall in a statement is a real loss of income.

Reducing friction

A professionally run portal and standardized processes save owners time. This sounds soft, but for many owners, it is the decisive reason not to sell the property – as long as the management runs reliably.

Direct answer: A well-positioned property management company can typically increase the net rental yield of a property by 0.2 to 0.5 percentage points – through lower vacancy costs, optimized maintenance management, and legally secure billing.

Core insight: Calculating the profitability of renting means seeing three levels: gross rental yield for quick orientation, net rental yield for realistic income, return on equity for the financing perspective. Those who only know the first figure make decisions on an incomplete basis.

Our position: Property management companies that actively assist their owners with this calculation significantly increase their advisory quality and customer loyalty.

Economic outlook: With interest rates remaining elevated and growing regulatory pressure, owners will ask the profitability question more frequently. The complete efficiency guide for property management companies is explained in Increasing efficiency in property management. Calculate your exact process costs per new tenancy: To the detailed calculator.

What is a good rental yield in Germany?

In major German cities, gross rental yields are currently mostly between 2.5 and 4.5%, and slightly higher in B and C cities. A yield is considered "good" when the net rental yield is significantly higher than the current borrowing interest rate.

Which costs do I have to deduct for the net rental yield?

All non-recoverable ongoing costs: property management, maintenance reserve, risk of rent loss, proportional non-recoverable service charges, ongoing repairs. Not deducted in the classic net rental yield: financing interest and taxes.

How high should the maintenance reserve be set?

In practice, €1 to €1.50 per square meter and month is often set, with correspondingly more for older properties. Anyone calculating for actual profitability should calculate rather conservatively.

Is renting worth it at all with a negative return on equity?

That depends on the perspective. From ongoing income: no, as long as the cash flow remains negative. Taking into account appreciation, debt repayment gain, and tax advantages, the overall calculation can still be positive.

What role does property management play in the yield?

A larger one than often assumed. Professional management reduces vacancy times, structures maintenance costs, and ensures legally secure billing. In total, this can raise the net rental yield by 0.2 to 0.5 percentage points.