Key legal question
Whether refusing the 4% depreciation deduction on the commercial building was arbitrary under Geneva tax law.
Extracted holding
Yes. The cantonal court failed to examine whether the property actually suffered a loss in value or whether the chosen depreciation rate was excessive; the refusal was therefore arbitrary.
Extracted reasoning
For business assets, depreciation is deductible only if commercially justified and reflecting real depreciation. A rented business property may still be depreciated; rents do not preclude depreciation. The authority had to assess actual long-term diminution or an excessive rate, which it did not do.