Wednesday have climbed into the play off places in the Championship, and they look destined to finish in the top six.
The Owls need just one more victory from their final two fixtures - against Cardiff City and Wolverhampton Wanderers - to confirm their place in the play offs.
But Bannan believes that Wednesday will not be able to describe their season as a total success unless they are promoted.
“Good. Not very good,” he said. “Good. It will be very good if we get promoted.”
Wednesday were somewhat of an unknown quantity before the season, after a great amount of changes were made last summer.
The appointment of Carlos Carvalhal was a left-field one, and a large volume of players also arrived at Hillsborough.
The Owls have been in excellent form, though, to produce a highly encouraging campaign.
If Wednesday do make it into the play offs they are likely to meet whichever team out of Brighton & Hove Albion, Burnley and Middlesbrough does not make it into the automatic promotion spaces.