— Kirk Cousins (@KirkCousins8) March 3, 2016
On his Twitter account Wednesday, agent Mike McCartney announced that Cousins would accept the tender, which gives him a one-year contract worth $19.95 million for next season.
Cousins was given a franchise tag by the Redskins on Tuesday, the league's deadline to do so.
Both sides want to continue working on a long-term deal, but sources say Cousins is comfortable playing under the franchise tag with free agency set to begin March 9. The Redskins have until July 15 to complete a long-term deal or Cousins will play under the tag. The sides do not appear close to a deal.
Cousins helped the Redskins win the NFC East with a breakthrough performance last season, his fourth in the NFL but first as a full-time starter.
The Associated Press contributed to this report.