Executive producer Paris Barclay hinted earlier this year that the FX biker drama could end its run in 2014.
"Season seven was always my goal because I know how this cable model works," Sutter explained to Collider. "I know, at the end of seven seasons, the above-the-line costs usually outweigh the value of the show.
"I've always had that number [of seasons] in my head and I thought, 'Yes, I can do that'. I had the loose constructs of those seven seasons in my head, and I still had those. We're still heading in that direction and working towards that."
Sutter added that he would be open to writing an eighth season of Sons but only if the story demanded it.
"If I get halfway through season six and I'm feeling like, 'I don't know if I'm going to be able to do this and tell the story that I need to tell in seven seasons', then I think I can probably have a conversation with [FX president] John Landgraf," he conceded.
"What I definitely don't want to do is just extend the show for another season, for the sake of doing an eighth season. What I don't want to do is pad and fluff and pull and drag s**t out that really should be happening in seven seasons, for the sake of just doing another season, even though I'm sure the fans would love another season."
The fifth season of Sons of Anarchy concluded last week on FX and will debut in the UK on Channel 5 in early 2013.
> Sons of Anarchy prequel a possibility, creator reveals at Comic-Con
Watch a promo for the Sons of Anarchy fifth season finale below: