The pair, who announced their marriage break-up last weekend, are keen to avoid a messy divorce for the sake of their three children, The Mirror says.
The insider claimed: "There will be no court battle over who owns what or who is entitled to what. That is the furthest thing from their mind.
"They still love each other very much. The family is not broken up. Their aim when they told their kids about the break-up is that family life doesn't change for them.
The informant went on: "They don't want to be one of these families who when the parents break up the kids never see mum and dad together again. That's how they want it. To remain a family unit.
"They tried everything to make their marriage work again. Everything. It just didn't work out in the end.
"It is sad that they are not going to get back together. It was up in the air a while there last year but it came down with a bang."
They initially split in May 2010 following claims that Ronan had cheated on Yvonne with backing dancer Francine Cornell.
> Ronan Keating dancer Francine Cornell 'going abroad to move on'
> Ronan Keating: 'My family means everything'