The amount was determined by the half-day hearing length of the case, said ERA member Michael Loftus.
At the January hearing Mr Loftus found Ms Fisher was unfairly dismissed because her employer failed to justify her decision to terminate employment.
Ms Fisher had worked three or four afternoons a week for Ms O'Brien and later took up cleaning duties too, but problems quickly arose including claims raised by the children about her driving and swearing, said Ms O'Brien in January.
On June 22, 2011, Ms Fisher was caring for the five children and three others while the O'Briens went to dinner with friends.
``There was some discord which led to both Ms Fisher and one of the children telephoning Ms O'Brien during dinner expressing their discontent,'' said the finding.
The next morning, Ms O'Brien texted Ms Fisher saying the employment arrangement could not continue because it was too hard.
At the January hearing Mr Loftus ordered Ms O'Brien to pay Ms Fisher $4000 as compensation for humiliation and hurt feelings and $1779 in lost wages.
Ms O'Brien said at the time she would not hire another nanny without a written agreement.
Ms Fisher could not be reached for comment and Ms O'Brien did not return calls.