Working for yourself changes how you keep records and pay tax. It can give you scope to deduct qualifying business costs, but it does not make every purchase tax-deductible or guarantee a lower bill.
A sole trader or individual partner is distinct from someone working through their own limited company.
Claim the right costs
Expenses must meet the business-purpose rules. Where a cost has both business and private use, establish the allowable business element and retain evidence of the split.
Equipment and other longer-lasting assets may have different treatment from ordinary running costs. The accounting basis you use also matters.
Business borrowing costs need to relate to the business. The label on an account does not replace a review of how the funds were used.
Use the official self-employed expenses guide when organising records.
Plan for tax payments
Tax is not normally deducted from each customer receipt in the way PAYE is deducted from salary. Set money aside and account for payments on account as well as the final liability.
CIS deductions may already have been taken from construction receipts. Keep statements so those deductions can be dealt with correctly.
Meet the reporting requirements
Review Self Assessment registration, National Insurance and VAT responsibilities. A loss or low turnover does not answer every registration question.
Our tax reference links to current figures, while working for yourself explains the registration framework.
Agree a bookkeeping system early and review obligations as the business grows. Any grant or benefit support should be checked against current eligibility rather than built into the plan from an old scheme description.