Mr Bujak is accused of the alleged fraud spanning seven years while he was running the Montessori St Nicholas charity.
The 56-year-old is jointly charged with a number of former Montessori business associates in connection with the alleged swindle.
His alleged crimes also include corporate credit card and invoice fraud, according to City of London Police.
Mr Bujak has been charged alongside three co-accused men and the wife of one of the men.
The judge fixed the trial to take place on 18 September next year.
The investigation was triggered after Montessori passed information to police in November 2014, and Mr Bujak was arrested in January last year.
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