Key legal question
Whether half of a voluntary second-pillar buy-in is deductible from AHV contribution income for a self-employed person.
Extracted holding
Yes. For self-employed earners, voluntary pension fund buy-ins that are permitted by the pension scheme may be deducted from gross income to the extent of the usual employer share, here 50% of the buy-in.
Extracted reasoning
There was no binding effect of the tax notification because the taxpayer had no reason to challenge the tax assessment. Under AHV law, the reference to direct federal tax rules is limited by the specific AHVG rule allowing only the usual employer share. Recent case law clarified that even voluntary buy-ins allowed by the pension regulations fall within the deductible items.