More than half of the retired general's income the past two years came from speeches and book-writing, according to Clark's disclosure form, filed with the Federal Election Commission.
In 14 months, Clark made more than $1 million at Stephens before leaving to start his own consulting firm. Clark's checking account at his consulting business contains $500,000 to $1 million, according to his disclosure form, which allows filers to provide income ranges rather than specific amounts.
Last year, Clark became board chairman at WaveCrest Laboratories in Virginia, collecting $195,000 for consulting on the design and distribution of the company's motorized bicycle that is being marketed to the US military.
Tom McMahon, a spokesman for WaveCrest, has said the research and development firm made Clark its board chairman because of his interest in science and technology.
Clark said last month that military technology played a big role in his post-military career. But he said he received those lucrative jobs and directorships "because I was a smart guy who could provide leadership," not so much as a gadget guru.
Clark's net worth is $3 million to $3.5 million, his campaign says.
In Clark's last full year in the military, his taxable income from his military pay was $58,000, at a time when he was NATO's supreme allied commander overseeing the war in Kosovo. Clark leaves today to testify at the war crimes trial of former Yugoslav leader Slobodan Milosovic.
In his first full year at Stephens, Clark's income was $670,000, excluding his military retirement pay. Last year, his income was $1.52 million, minus his military pension of $85,000.
For 2001, Clark's earnings from writing, speeches, and sitting on boards of directors amounted to $421,955. Last year, that figure was $971,885.
Clark's speaking engagements have brought him nearly $1.5 million in the last 23 months.
The release of his tax returns is an effort "to give the American people a complete sense of his financial background," said campaign spokesman Chris Lehane.
Clark owns houses in Little Rock and Virginia, and recently sold a rental property in Colorado, collecting between $15,000 and $50,000 on the sale, according to his disclosure form. He also owns a home on 20 acres west of Little Rock in rural Paron, Ark.