Switzerland: Tax Deductibility of Asset Management Costs

Managing securities portfolios and other private capital investments usually involves a range of costs. For investors in Switzerland, an important recurring question is which of these expenses may be deducted from taxable income.

The tax deductibility of asset management costs is governed by federal principles and cantonal practice. While the core rules are set at federal level, the way they are applied can differ between cantons, particularly where lump-sum deductions are available.

In general, deductible costs are limited to expenses incurred for the administration of private assets by third parties, such as banks or asset managers. These may include custody fees, safe deposit box charges, fees for preparing tax statements, collection fees for interest and dividends, costs connected with reclaiming foreign withholding tax, and negative interest charged by banks.

By contrast, costs connected with acquiring, selling, restructuring or increasing the value of investments are generally not deductible. This includes brokerage fees, commissions, stamp duties, stock exchange charges, investment advice, tax advice, performance fees and, in many cases, flat-rate wealth management fees unless they are clearly broken down into deductible and non-deductible components.

Some cantons allow taxpayers to choose between claiming the actual deductible costs incurred or applying a lump-sum deduction. The actual-cost method requires full supporting evidence, while the lump-sum method is usually calculated as a small percentage of the taxable value of third-party managed securities. Cantonal rules vary, and many cantons impose a maximum amount for the lump-sum deduction.

A key point is that only costs relating to qualifying third-party managed assets are deductible. For example, privately held participations or private loan receivables may not qualify in the same way as bank-managed securities. Taxpayers must therefore distinguish carefully between assets that fall within the relevant rules and those that do not.

The Swiss Federal Supreme Court has also confirmed that where deductible costs are properly evidenced, they may not be restricted by an arbitrary fixed cap. However, the burden of proof remains with the taxpayer when claiming actual costs.

For individuals and families with significant investment portfolios in Switzerland, the practical message is clear: asset management costs should be reviewed carefully each tax year, supporting documentation should be retained, and cantonal rules should be checked before deciding whether to claim actual costs or a lump-sum deduction.