Tax period

A tax period defines the temporal unit to which a tax liability relates. For Swiss income and wealth taxes, individuals are generally assessed by calendar year, while companies are commonly assessed by their business year for profit and capital taxes. The tax period must be distinguished from the assessment period and the filing or payment deadlines. Changes such as moving residence, starting or ending business activity, death, liquidation or restructuring may affect how income, assets or profit are allocated between periods and jurisdictions.