Your first return is easier when income, costs and personal tax information are gathered before the filing rush. The return may include more than the figures from your business bank account.
1. Confirm the tax year and registration position
Establish which tax year the work belongs to and whether you need to register for Self Assessment. Keep the UTR and HMRC correspondence together.
2. Reconcile all business income
Use invoices, platform statements, bank receipts and cash records to build a complete total. Investigate missing numbers and duplicated deposits.
3. Organise expense evidence
Group costs into sensible categories and keep receipts or invoices. Mark mixed-use items for review rather than claiming the full cost automatically.
4. Include other relevant information
Employment, CIS deductions, bank interest, dividends, property income, student loan information and payments on account can affect the return.
5. Plan for the payment
Do not wait until filing day to consider cash flow. Once the figures are reliable, estimate the likely tax and discuss whether payments on account may apply.
Official guidance
Tax and reporting rules can change. Check the current primary guidance before acting.
Preparing your first return?
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Explore Self Assessment ↗This guide provides general information, not personal tax or employment advice. Your treatment and responsibilities depend on the complete facts and current rules.