Gather recent bank and credit card statements, household bills, tenancy or mortgage details, payslips or benefit letters, loan statements, insurance documents and details of subscriptions or regular payments. These can help you compare your income with essential and non-essential spending and identify costs to review. You usually do not need to share full documents just to make a budget, so remove account numbers and other sensitive information where possible. If you are applying for a discount, grant or benefit, the evidence required varies, so check the relevant provider or official GOV.UK guidance.