Advisers could be hit with a further compensation bill for Keydata as the FSCS says it has not ruled out another levy linked to the failed investment firm.
An FSCS spokesperson said the scheme is currently balancing the figures to see if more money is needed to cover the cost of compensating investors in the bust firm.
The calculations are based on what recoveries the FSCS has secured, the amount it has already raised through levies, any refunds it must pay out as a result of firms resubmitting their eligible income forms, and what compensation needs to be paid.
According to the spokesperson, the FSCS will know in June if a further levy will be needed.
The FSCS had pledged in March to use the money it receives from the £51m Keydata compensation deal it struck with N&P to partly refund advisers' levies.
The spokesperson said it is also possible the scheme ends June with a surplus which could then be redistributed to levy payers, or used to reduce next year's bill.
She said the FSCS is in discussions with industry trade bodies to determine how such a refund would be repaid.
Investment advisers have already been forced to payout £93m of a £326m interim levy, mainly linked to investor compensation for failures related to Keydata's collapse in 2009.
Some advisers saw their FSCS bill increase by many hundreds of percent as a result.
Javid's first fiscal announcement
'Misunderstood our profession'
Newly created role
No direct replacement planned
Could be delayed by general election