Megaupload founder Kim Dotcom's extradition hearing is likely to be delayed even further, a court has heard.

Dotcom and his wife Mona were back in the High Court at Auckland on Wednesday asking for more money so they can keep paying their staff.

Mrs Dotcom wants $20,300 a month to be released from the restrained funds so her household staff, including nannies, cooks and butlers, can continue to be paid.

When the original court orders releasing the funds were made, Dotcom's extradition hearing was expected to be held in August this year.

The extradition hearing has been adjourned until March, but Anne Toohey, a lawyer acting on behalf of the commissioner of police, told the court there is a "high likelihood" it may now be delayed until July.