Yield Calculation for Swiss Real Estate: How to Calculate the Return
You are considering buying an investment property -- but is the investment really worth it? The answer lies in the yield calculation. It shows you how much return a property generates relative to the capital invested. Anyone who calculates imprecisely here risks an expensive mistake.
In this article, you will learn the three most important yield metrics step by step: gross yield, net yield, and return on equity. Each formula is illustrated with a concrete Swiss example so you can get started immediately.
What Is the Yield of a Property?
The yield of a property describes the ratio between return and invested capital. It answers every investor's central question: What do I get back for my money?
There is no single "yield." Depending on which costs you include and whether you use debt, different metrics result. The three most important are gross yield, net yield, and return on equity -- each illuminates your investment from a different angle.
In Switzerland, yield calculation is particularly important because purchase prices in many cantons are very high. A difference of half a percentage point can amount to tens of thousands of francs over the years. Anyone who calculates carefully makes better decisions -- and avoids nasty surprises after the purchase.
For a detailed comparison of the three metrics, I recommend the article Gross Yield vs. Net Yield vs. Return on Equity.
Gross Yield: The Quick Orientation
Formula
Gross Yield = Annual Rental Income / Purchase Price x 100
Gross yield is the simplest of all yield metrics. It relates the annual rental income to the purchase price -- without ancillary costs, without maintenance, without financing.
Example
- Purchase price: CHF 1,000,000
- Monthly net rent: CHF 3,200
- Annual rental income: CHF 38,400
Gross Yield = CHF 38,400 / CHF 1,000,000 x 100 = 3.84%
When Is Gross Yield Useful?
Gross yield is excellent as an initial filter. When comparing ten properties on real estate portals, it helps you immediately sort out the obviously overpriced ones. However, it is not sufficient for a purchase decision -- for that, you need the net yield.
Caution: Gross yield tempts you to make properties look better than they are. Transaction costs, vacancy, and maintenance can reduce the actual yield by 1-2 percentage points. Agents and sellers almost always communicate the gross yield -- because it looks higher. Do not be misled and always calculate it yourself.
Net Yield: The Realistic Picture
Formula
Net Yield = (Annual Rental Income - Operating Costs) / (Purchase Price + Transaction Costs) x 100
Net yield includes all running costs and one-off transaction costs. It shows what the property truly generates after deducting all expenses.
Which Costs Are Included?
Annual operating costs:
- Maintenance and upkeep (rule of thumb: 0.5-1% of the building insurance value)
- Management costs (approx. 3-5% of rental income)
- Insurance (building, liability)
- Vacancy risk (rule of thumb: 2-5% of rental income)
- Non-recoverable ancillary costs
One-off transaction costs:
- Transfer tax (varies by canton, 0-3.3%)
- Land registry fees (approx. 0.1-0.5%)
- Notary fees (approx. 0.1-0.5%)
- Bank valuation fees
How significantly transaction costs vary by canton can be seen in the cantonal comparison.
Example
- Purchase price: CHF 1,000,000
- Transaction costs (Canton of Zurich): approx. CHF 15,000
- Annual rental income: CHF 38,400
- Maintenance: CHF 5,000
- Management: CHF 1,500
- Insurance: CHF 1,200
- Vacancy (3%): CHF 1,152
- Total operating costs: CHF 8,852
Net Yield = (CHF 38,400 - CHF 8,852) / (CHF 1,000,000 + CHF 15,000) x 100 = 2.91%
The difference from the gross yield of 3.84% is nearly a full percentage point. This shows why you should never rely on gross yield alone.
Why Net Yield Is So Important
Net yield is the fairest metric for comparing different properties because it is independent of financing. Whether you contribute 25% or 40% equity makes no difference -- the net yield stays the same. This makes it the ideal tool when weighing multiple purchase options.
Note, however: the quality of the net yield depends on the accuracy of your cost estimates. Anyone who underestimates maintenance or forgets vacancy is flattering the net yield. Be conservative rather than optimistic here.
Return on Equity: The Leverage Effect
What Is the Leverage Effect?
Most properties are not fully financed with equity. In Switzerland, investment properties typically require 25% equity, with the remaining 75% financed via a mortgage. This debt creates a leverage effect: you benefit from the appreciation and rental income of the entire property even though you financed only a fraction yourself.
Formula
Return on Equity = (Net Rental Income - Mortgage Costs) / Equity x 100
Where Mortgage Costs = Mortgage Interest + Amortisation.
Example
- Purchase price: CHF 1,000,000
- Equity (25%): CHF 250,000
- Mortgage (75%): CHF 750,000
- Net rental income (after operating costs): CHF 29,548
- Mortgage interest (1.8% on CHF 750,000): CHF 13,500
- Amortisation (1% on 2nd mortgage, CHF 83,333): CHF 833
- Total mortgage costs: CHF 14,333
Return on Equity = (CHF 29,548 - CHF 14,333) / CHF 250,000 x 100 = 6.09%
This is significantly more than the net yield of 2.91%. The leverage works -- but beware: it works in the other direction too. If interest rates rise or rents fall, the return on equity drops disproportionately.
How the cashflow of this example breaks down in detail is explained in the article Calculating the Cashflow of an Investment Property.
Return on Equity Without Amortisation
Some investors calculate the return on equity without amortisation, since amortisation is wealth accumulation and not a "loss." In our example, this would look like:
ROE before amortisation = (CHF 29,548 - CHF 13,500) / CHF 250,000 x 100 = 6.42%
Both approaches are legitimate. For cashflow purposes, the version with amortisation is more relevant; for wealth assessment, the version without. The key is to always transparently state which variant you are using.
Sensitivity: What Happens If Interest Rates Rise?
Return on equity reacts strongly to interest rate changes. If the mortgage rate rises from 1.8% to 3.0%, mortgage interest increases to CHF 22,500/year. The ROE then falls to:
(CHF 29,548 - CHF 22,500 - CHF 833) / CHF 250,000 x 100 = 2.49%
This sensitivity makes it clear why you should always run scenarios with higher interest rates when planning returns. How the bank assesses interest rate risk is explained in the article Affordability for Investment Properties.
Typical Yields in Switzerland by Region
Achievable yields in Switzerland vary significantly -- depending on region, location, and property type. Here is a rough guide (gross yields):
| Region | Gross Yield | Comment |
|---|---|---|
| City of Zurich | 2.5-3.5% | High purchase prices, low yields, but stable |
| Bern, Basel | 3.0-4.0% | Solid middle ground |
| Lucerne, St. Gallen | 3.5-4.5% | More attractive yields with a solid market |
| Aargau, Thurgau, Solothurn | 4.0-5.5% | Higher yields, partially higher vacancy risk |
| Rural areas | 5.0-7.0% | Attractive on paper, but higher risk |
Important: High gross yields are not a quality mark. They often come with higher vacancy risk, more difficult tenant searches, and less appreciation potential. The net yield tells the true story.
A property with a 3% gross yield in Zurich can be more profitable after costs than one with 6% in a rural municipality with high vacancy. The cantonal comparison shows you how much the framework conditions vary by location.
Common Mistakes in Yield Calculation
1. Forgetting Transaction Costs
Transfer tax, notary fees, and land registry fees can amount to 1-5% of the purchase price depending on the canton. Anyone who ignores them systematically overestimates the yield.
2. Underestimating Maintenance
Older properties often consume more maintenance than planned. A flat roof, a heating system replacement, or a plumbing problem can quickly cost CHF 50,000-100,000. Budget at least 1% of the building value per year.
3. Ignoring Vacancy
Even in good locations, an apartment stands empty for one to two months between tenants. Always factor in 2-5% vacancy.
4. Using Gross Yield as the Basis for Decisions
Gross yield is a screening tool, not a decision criterion. Anyone who buys on this basis is often disappointed.
5. Ignoring Interest Rate Trends
Anyone who calculates with a rate of 1.5% today and takes out a variable mortgage should work out what happens at 3% or 4%. The bank's affordability calculation is a good reality check.
6. Forgetting Taxes
Rental income is income and is taxed. The after-tax yield can be significantly lower than the pre-tax yield. At the same time, mortgage interest and maintenance costs are tax-deductible. The tax burden varies greatly by canton and municipality -- a factor many investors underestimate when choosing a location.
7. Calculating Only with Optimistic Assumptions
Anyone who sets the rent at the upper end, maintenance at the lower end, and vacancy at zero will naturally get an attractive yield. The problem is that it does not match reality. Always calculate conservatively: set the rent slightly lower, budget generously for maintenance, and factor in vacancy. If the property still shows an acceptable yield with conservative assumptions, you have found a solid investment.
How to Proceed: Yield Calculation in 5 Steps
- Determine rental income: Check the current net rent and compare with the municipality's rent index.
- Calculate transaction costs: Transfer tax, notary, land registry -- varies by canton.
- Estimate operating costs: Maintenance, management, insurance, vacancy.
- Clarify financing: How much equity do you have? At what interest rate will you finance?
- Calculate all three yields: Gross yield for a quick comparison, net yield for reality, return on equity for the leverage effect.
Calculate Yield Automatically
You do not want to calculate everything by hand? The immometrics yield calculator computes gross yield, net yield, and return on equity automatically -- including all Swiss specifics such as cantonal transaction costs and imputed affordability.
Calculate the yield of your property for free with immometrics -> /prognose