Saracens will play at Wembley for the third season in a row, after lining up two fixtures at the stadium.
The north London club will use the national stadium to host Ospreys in the Heineken Cup in December and March's Premiership clash against Harlequins.
Sarries first played at Wembley in September 2009, beating Northampton Saints 19-16.
The English champions hope to move to a new stadium at Barnet Copthall early next year.
Delays in the planning process for the proposed venue mean Saracens will play at least 10 games at Watford Football Club's Vicarage Road next season, their home since 1997.