Track income clearly
Keep dates, amounts, customers or platforms, invoices and payment evidence together.
Build a practical records checklist for your self-employed year, so income, expenses and evidence are easier to review when you need them.
This is practical guidance, not a full accounting system. It helps you start simple and keep the year easier to untangle.
Your records support the figures you put on a Self Assessment return. Good records also make it easier to understand your year before deadlines arrive.
Keep dates, amounts, customers or platforms, invoices and payment evidence together.
Receipts, bills and notes help you remember what a cost was for later.
A simple system during the year is usually easier than reconstructing everything at once.
Select the income types and record-keeping habits that match your situation.
Start with the evidence that helps explain what happened: date, amount, source, category and why it matters. For a fuller explanation, read the records guide after building your checklist.
A clear spreadsheet or simple software setup can be enough to build a useful habit. The important thing is being able to review the evidence behind your figures later.
You do not need a perfect system on day one. A small repeatable habit usually helps more than a large catch-up near the deadline.
Save receipts, invoices, bank evidence and notes while the transaction is still fresh.
Pick a weekly or monthly moment to add categories and check for missing records.
Look for gaps while there is still time to find evidence or ask for help.
Treat the checklist as a practical starting point. It should help you decide what to capture next, not replace professional advice or a full accounting workflow.
Short answers before you build your checklist.
Keep records that support your income and expenses, such as invoices, receipts, bills, bank statements, sales reports and short notes where the purpose is not obvious.
A clear digital copy can often be useful, but the important point is that you can find and review the evidence later. Keep originals where your adviser or official guidance says they matter.
Self-employed people usually need to keep business records for several years after the relevant Self Assessment deadline. Check current GOV.UK guidance for your exact situation.
Yes, for many simple situations a spreadsheet can be a useful starting point. If MTD applies to you, check whether your setup needs compatible software.
Try to keep other supporting evidence such as bank records, supplier emails or notes. If the amount is important, ask the supplier for a replacement where possible.
No. It is practical planning guidance to help you organise records. Your exact requirements can depend on your circumstances.
SelfYear helps you connect records, deadlines, notices and practical prompts into one clearer self-employed year view.