The Dutch manager took charge at Goodison Park last week.
The Dutch boss was confirmed as the new Blues boss last week, completing a protracted move from Southampton.
He is expected to be busy in the summer transfer window as Everton look to bounce back from a disappointing 11th placed finish last.
Numerous reports have suggested that Koeman will be handed a significant transfer budget by shareholder Farhad Moshiri to build a team capable of challenging for the top four.
And speaking to the club’s official website, he confirmed that there is the budget to build a strong team at Goodison Park.
"If we need players to make the team better, a budget is available to make a strong team which the fans can enjoy,” he told evertonfc.com.
“When the transfer window is closed, you can’t tell what you want to achieve for the season - it’s still too early because you don’t know at this stage what can happen in the window.”
It will certainly be intriguing to see what work Koeman does in this summer transfer window given the funds he has at his disposal.
This current Everton squad is one of the best for a number of years, and arguably does not need drastic changes to turn it into a competitive one.
The number of arrivals will likely be determined by how many leave the club, with the likes of Romelu Lukaku and John Stones both linked with big money departures.