I now have the acquisition costs under control. But what regular costs do I have to expect afterwards?
In this case, it is no longer the wealth that is relevant, but the monthly income. Providers who grant a mortgage usually expect a so-called safety interest rate of 5 percent – even if the current interest rates are very attractive and are sometimes below 1 percent. How so? This is a hedge for both sides should interest rates rise again in the future. With a mortgage of CHF 800,000, the 5 percent corresponds to CHF 40,000. But you also have to plan maintenance and ancillary costs: if you have your own house, you have to pay for renovations yourself, and the various connections continue to cost. Here, 1 percent of the purchase price is generally estimated: 10,000 francs. Also not to be forgotten: the amortization. If the 150,000 francs on the second mortgage are to be amortized within 15 years, this is an additional 10,000 francs per year. For our calculation example, you still have to be able to cope with annual costs of 60,000 francs – should interest rates rise again. As a rule of thumb, the annual costs should not be higher than a third of the gross income.
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