A major issue has sprung up surrounding Hillary Clinton’s tax returns and where the money lent to her campaign fund has come from. We don’t yet know what these documents will reveal but ahead of Clinton’s release ABC News has put out an estimate placing the Clinton’s worth at $50 Million gained from Bill giving various speeches since leaving office.

An independent review by ABC News has found that since leaving the White House seven years ago, the senator and her former president husband have made well over $50 million, much of it from paid speeches made by Bill Clinton.

A review of Sen. Clinton’s annual ethics filings found that her husband has earned $47 million in fees from more than 280 speeches he has made around the world.

Who is paying the major bucks for those speeches?

Clinton’s biggest patrons include New York-based investment firm Goldman Sachs, which paid him $650,000 for four speeches in recent years, and two foreign firms. Gold Services International, a Colombian-based event organizer, brought Clinton to Latin America in 2005 for four days of speeches, earning Clinton $800,000. Another company, Toronto-based Power Within, paid Clinton $650,000 for a series of motivational speeches in Canada in 2005.