Independent presidential candidate Mary Davis earned 390,632 euro serving on six boards since 2000.
The former head of Special Olympics Ireland - paid 156,310 euro for her work with the charity last year - published her salary and employment record going back a decade in a bid to clear controversy over money earned in public service roles.
Three of the boards were on State bodies and the others commercial.
Ms Davis said she believed she has spent her time promoting causes which are important, both for people and the economy.
"Choosing a head of state is an important matter, and I believe that the people should make that choice with their eyes open. This is the case for me, and also for every other candidate in this race," she said.
"I now believe that the other candidates should follow my lead - there is no room for secrecy in this campaign, be it in relation to letters, to the salaries and expenses of candidates, or to their past membership of political parties or organisations."
Outside of paid directorships Ms Davis also took up 18 voluntary positions as either chair, director, advisor or judge on other boards. The roles included supporting disabilities, entrepreneurs, sports, a north-south body and St Patrick's Festival.
Ms Davis, who also published a copy of her latest P60 on her website, called on the other six candidates to follow her lead and show how much they were earning out of public life.
Ms Davis was head of Special Olympics when the summer games came to Croke Park in 2003. Her appointments to State boards were made by successive Fianna Fail-led governments.
Sinn Fein's Martin McGuinness sparked debate among candidates over salaries in the public service when he stated he lives on the average wage in Northern Ireland, £362 a week.