Depends.

If the PIO has demanded the additional fees after the mandatory time period of 30 days, then the same would not be maintainable. In such a case, the information has to be provided free of cost as has been held by the Central Information Commission in this judgment (https://indiankanoon.org/doc/166958/)

As per section 7 of the RTI Act, the details of further fees representing the cost of providing the information as determined by the PIO to arrive at the amount in accordance with fee prescribed under sub-section (1), requesting the applicant to deposit that fees, and the period intervening between the despatch of the said intimation and payment of fees shall be excluded for the purpose of calculating the period of thirty days referred to in that sub-section.