The 10000Hours Group will submit their bid to take St Mirren into fan ownership tomorrow.
A deadline had been set for last Friday, but was allowed to pass in order to raise more funds from supporters.
Project leader Richard Atkinson said: "It's a developing situation and we are getting closer all the time to our target of £1.5million.
"We will be making an offer tomorrow, but we can only offer what we can afford."
10000Hours started its online scheme after reaching an agreement in principle with the selling consortium, led by chairman Stewart Gilmour, to buy a 52% shareholding for a total purchase price of £1.5m over three years.
The Community Interest Company's aim of 750 pledges of £10-per-month has already been surpassed but two other categories requiring higher levels of funding are lagging behind.
"The response from the rank and file fans has been phenomenal," added Atkinson.
"It has been well in excess of what we hoped for and it's still growing.
"Individual membership at the moment is sitting at about 140% of what we budgeted for."
The other funding options are a one-off payment of £3,000 for what amounts to a lifetime membership and a fee of £25,000 to buy up a chunk of shares in the club.
The board, led by Gilmour, is hoping for a sale to be completed before the SPL season starts on Saturday, August 4.
Atkinson added: "If we don't buy it, someone else will."