At a hearing last week, he was granted bail provided he produced just over 5 million pounds ($7.7 million) and met other conditions.
"Those conditions have not been met and the defendant invites no further order from the court in that regard," his lawyer Joel Smith told Westminster Magistrates' Court.
District judge Jeremy Coleman said: "You have not met the conditions of bail as yet so I rebail you on exactly the same conditions as before. If you meet those conditions, you will be released, if you do not then you will be back here on May 6."
The date for a full extradition hearing was put back from August to September 24 and 25.
Sarao, wearing a grey sweatshirt and tracksuit trousers, spoke only to confirm his date of birth and address. The small courtroom was packed with more than two dozen journalists.
His lawyers declined to make any comment as they left the courtroom.
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