At least half of the group’s budget will come from a select group of donors who will each contribute or raise $500,000 or more, according to donors and strategists involved in the effort.

Unlike a presidential campaign, Organizing for Action has been set up as a tax-exempt “social welfare group.” That means it is not bound by federal contribution limits, laws that bar White House officials from soliciting contributions, or the stringent reporting requirements for campaigns. In their place, the new group will self-regulate…

“There are wins we can have on guns and immigration,” Jon Carson, the group’s new executive director, told prospective donors on a conference call on Wednesday, according to people who participated. “We have to change the conventional wisdom on those issues.”

But those contributions will also translate into access, according to donors courted by the president’s aides. Next month, Organizing for Action will hold a “founders summit” at a hotel near the White House, where donors paying $50,000 each will mingle with Mr. Obama’s former campaign manager, Jim Messina, and Mr. Carson, who previously led the White House Office of Public Engagement.