The Oslo District Court said that the verdict in the case of Marius Borg Hoiby will be delivered on June 15.
During six weeks of court proceedings that ended on March 19, prosecutors sought a prison sentence of seven years and seven months for Hoiby, who denies the rape allegations.
Hoiby, 29, is the son of Crown Princess Mette-Marit by a previous relationship and the stepson of Crown Prince Haakon, the heir to Norway's throne.
He is charged with 40 offences in total, including four counts of rape between 2018 and 2024.
Defence lawyers for Hoiby, who has no royal titles or official duties, said that there was no evidence to support the rape charges.
He has, however, admitted to lesser offences including drug possession, transporting 3.5kg of marijuana in 2020, traffic violations and breaches of a restraining order involving a former partner.
He has also partially admitted to acts related to violence and threats but disputes key aspects of those allegations, including intent.
The defence team has said that a maximum sentence of 18 months would be appropriate for the charges he has admitted to.
It argued that Hoiby has lived under extraordinary media pressure due to his royal connections, which they said has shaped public perception of the case.
While the trial has played out, Mette-Marit separately has faced scrutiny this year over her connections with the late sex offender Jeffrey Epstein.
That has raised questions over her judgment, although she is not accused of any wrongdoing.
