A member of the Swiss People's Party (SVP/UDC), he has served in the Council of States since 2003, representing the canton of Schwyz.

[8] In 2012, Kuprecht initially won an election as one of the vice presidents of the party's parliamentary group by two votes over Natalie Rickli.

After some members including Christoph Blocher, one of the party's leaders, called for a re-vote, Kuprecht stepped down and allowed for a new vote in which Rickli was elected.

Kuprecht cited concerns that the "Masseneinwanderung stoppen" initiative could jeopardize Switzerland's treaties with the European Union.

[12] As a lobbyist for an insurance company, he has been criticized for his influence in passing health and social legislation through his committee.