Your mortgage loan can also concern a professional part of your home: your office, your doctor's office, your workshop, your store... Be sure to determine the areas occupied for each use, private and professional. This is important for your tax return and estimating your business expenses. The tax authorities will be careful to examine whether the surface you declare for professional use corresponds to reality.
Your accountant or tax advisor will help you choose the most suitable solution. In particular as regards the type of mortgage loan to be taken out, privately or via an investment loan, possibly linked to a mortgage, on a professional basis. A mix of the two formulas is also possible.