The end of the tax year is not when the work happens — if records were kept through the year, it is when they are checked, closed and handed over. This checklist is the closing routine: reconcile the income, sweep for the deductions that leak, archive the evidence, and adjust the system for next year. Budget an afternoon with complete records; without them, budget the week you will spend earning this checklist the hard way.
When does your tax year actually end?
Not necessarily in December. Many jurisdictions tax on the calendar year, but not all — the UK’s tax year for individuals runs to early April, and other systems have their own boundaries. Your filing deadline is a different date again, usually months after the year-end, and instalment deadlines may fall in between. Put all three in your calendar from your tax authority’s published dates rather than folklore.
The year-end matters for more than deadlines: it defines which records belong to which return. Entries near the boundary — the shift that straddles year-end, the invoice issued in one year and paid in the next — deserve a moment’s care, because the treatment of invoiced-versus-paid timing varies by jurisdiction and accounting basis. When a boundary entry is genuinely ambiguous, flag it for your adviser instead of guessing.
What should you reconcile first?
Income, source by source. For each platform, download the year’s payout statements — while the account still exists to download from — and check them against your own ledger. For client work, confirm every invoice is accounted for: paid ones matched to the money, unpaid ones consciously carried forward or written off per your rules. Then confirm cash income, chiefly tips, is present; it exists only where you recorded it.
The goal is one defensible total per source, agreeing with the evidence behind it. Discrepancies found now are fixable — a platform support ticket, a chased invoice, a corrected entry with a note. The same discrepancies found by a tax authority later come with fewer options and worse assumptions.
What deductions should you sweep for?
The ones that leak — the categories where reality outran the records. Walk them deliberately:
Sweep with honesty in both directions: claim what the evidence supports, and resist inventing what it does not. A reconstruction made now, labelled as such, is legitimate; a number conjured to fill a gap is the thing audits exist to find.
- Mileage: does the log cover the whole year, and are unclassified trips sorted?
- Platform fees and commissions withheld before payouts reached you
- Small equipment bought during the year — bags, mounts, chargers, tools
- The business share of phone, data and other apportioned costs, with the method noted
- Software and subscriptions that served the business, including record-keeping tools
- Professional costs: adviser fees, relevant insurance, required licences
What should you export and archive?
A complete, dated snapshot of the year, stored on your own storage: the earnings ledger, the expense records with their receipts, the mileage log with routes, issued invoices, and the platform statements you downloaded during reconciliation. Once the return is filed, add the return itself and any calculation summary behind it, so the whole story of the year lives in one archive.
This is the package a professional works from, and the difference it makes is practical: an adviser handed organised exports spends their hours on judgment — the boundary entries, the apportionments, the things worth their fee — instead of on data entry. It is also your audit insurance, kept for as long as your jurisdiction requires; the receipts-retention guide on this blog covers the how-long question.
What sets up next year to be easier?
Fix, in the first week of the new year, whatever this year-end exposed. If mileage had gaps, make capture automatic so the log keeps itself. If receipts were the weak point, adopt the photograph-at-purchase habit. If the tax bill was a scramble, start the set-aside and checkpoint routine now — the quarterly tax-planning guide on this blog is the companion piece. Each fix is small; their sum is a year-end that takes an afternoon.
Then set the new year’s income goal from the evidence in front of you — last year’s real totals, not hopes — and let the pacing run from day one. The best time to build the system was last January. The second best time is before this one gets busy.