Wellington Phoenix general manager David Dome has mixed feelings about Perth Glory getting the boot from next month's A-League finals series following three seasons of cheating the salary cap.

Glory, who were second on the A-League ladder, were banned from the finals on Friday after Football Federation Australia determined that the club deliberately hid salary cap rorting for three seasons.

Perth will be demoted to seventh at the end of the regular season after the FFA found that the club deliberately failed to disclose payments and benefits to at least six players and that it was about A$400,000 over the A$2.55 million salary cap during the past three seasons.

The upshot is that the Phoenix, who entered round 25 in fourth place, will almost certainly finish in the top-four and host at least one finals game at Westpac Stadium.

"Which is fantastic news for our fans," Dome said.

"You just have to look at the positives of that. But when clubs go outside the salary cap to get a competitive advantage, that is very disappointing. It's gutting, you have to feel for Perth fans. I don't know if players knew about it - you have to assume they didn't - so you have to feel for them as well. But if the club exceeds the salary cap there has to be repercussions and Perth have discovered that in a harsh way."

Dome was confident that the Phoenix were squeaky clean in terms of complying with the salary cap rules.

"We've declared everything, we're very clear and up front about any player payment or benefit," Dome said.

Perth beat the Phoenix 3-2 in the 2011-12 finals and Dome said there were now question marks over that result.

"Could there have been a player there that was employed by Perth who might not have been, unless they were rorting the system? But what can you do? You can't go back and replay games."

FFA chief executive David Gallop said that Perth's now-disgraced management was likely to be removed in the wake of the rorting.

The Glory have seven business days to lodge an appeal to being barred from the finals and fined A$269,000 by the FFA.

"The A-League is predicated on the basis that it has to be an even league to maintain interest throughout the competition and that's why they have a salary cap," Dome said.

"There should be no grey area. We feel like we're right on top of it, we know exactly what goes into the cap and we declare any costs for a player."