The venue costs more than expected, but the project still has money in another category. Can a volunteer move it? A budget total alone does not answer that question.
Separate the plan from the permission
Record the agreed spending categories, the source of funds and any restrictions attached to them. Then identify who can approve a change. Requirements from a grant, governing document or local law take precedence over an informal team preference.
For a fictional small project, the committee might allow a named coordinator to approve minor changes within an agreed limit while larger changes return to the committee. The amount is not universal. What matters is that the rule is written, understood and consistent with the funds’ conditions.
Record the reason, not just the new number
A useful change entry states the original item, revised amount, reason, approving person and date. It also identifies which activity is reduced or delayed if the overall budget cannot grow. Keep receipts and supporting records through the organisation’s established process.
Make the approval route workable when a volunteer is absent. Otherwise, a routine purchase can stall or someone may feel pressured to spend personal money without knowing whether reimbursement is permitted.
At the next review, compare planned spending, committed spending and money actually paid. An unpaid invoice still affects the amount available for a new decision. Avoid presenting the bank balance as the entire remaining budget.
Transparency does not mean publishing private bank details or personal information. It means the appropriate people can understand how money was authorised and used. A clear process protects volunteers as well as the community project they are trying to deliver.