Hello,
As the vehicle is on loan - so for change of registration to commercial number - you will need a Bank NOC
Now - Banks do not issue in NOC like that as the credit norms are different for private and commercial and the loan is already active
The only way would be to
> Close the loan by pre-paying in Outstanding Loan and any prepayment penalty if any
> Get NOC post closure and transfer to commercial registration
> Once registration done - you can apply for Top up loan which is based on used car
The Disadvantage would be
> Prepayment Penalty
> Loan will be booked at higher rate and for lower loan amount in Used Car Top up cases
So - may make a choice, but with an active loan on car - vehicle can not be re-registered to commercial number
Hope should help !!