A delegation led by chief executives body Acevo will meet Chancellor Alistair Darling to discuss how the voluntary sector can work with Government to deliver savings to the public purse.
Last year, Acevo organised a letter signed by more than 250 charity chief executives requesting a meeting with Darling to talk about public services reform.
After receiving no immediate reply from the Treasury to the letter, sent on 1 December, Acevo secured a meeting with top-level members of the shadow cabinet to discuss similar issues.
The Chancellor has now responded to the letter, which apologises for the delay in replying and offers a meeting.
The response says Darling welcomes the "constructive stance your letter sets out in engaging with government on public sector reform and the tighter spending environment.
"I was interested in the many examples of added value in service delivery by the sector that you outlined in your letter. I would therefore also be grateful if you and your members could provide government with further examples and information to build the evidence base around the third sector's ability to deliver efficiencies for government."
An Acevo spokeswoman said the chief executives body would be going back to members to ask for such examples before deciding who would take part in the meeting, for which a date has not been set.