Private investors, but increasingly also advisors, often find themselves overwhelmed by the numerous options for capital investment. Not only is the type of investment complex, but the taxation is multifaceted and requires careful consideration. This work explains the taxation of traditional investment forms and provides numerous tips for advisory practice. The focus of the work is on the following topics: - Taxation of interest and dividends - Taxation of income from investment funds - Allowances and flat-rate expenses - Capital gains tax and final withholding tax - Private sales transactions (securities, futures) - Foreign capital income - Information gathering by the tax authorities - External audits of income from capital assets. The compact and practical presentation makes this work a valuable tool for every advisor.