End-of-Year Bookkeeping Checklist for a Solo Service Business
Before the year ends, reconcile every account (bank, card, cash, and any peer-to-peer apps) against your ledger, chase down any outstanding invoices while the year is still fresh, confirm every expense has a receipt on file, total your mileage log, and export a clean summary for your accountant. Doing this in December, rather than waiting for tax documents to arrive in the new year, catches gaps while you can still fill them from memory.
The checklist
- Reconcile every account. Bank, card, cash log, and any peer-to-peer apps — confirm your ledger matches what actually happened.
- Chase outstanding invoices. Follow up on unpaid balances while the job and the customer are still fresh in both your minds.
- Confirm every expense has a receipt. Spot-check categories where gaps are common — small supply purchases, one-off equipment repairs.
- Total your mileage log. Confirm it’s complete for the full year, not just the months you remembered to log consistently.
- Export a clean summary. Income, expenses by category, and mileage, ready to hand to your accountant or use for your own filing.
Why December, not January
A gap found in December is still fixable — you can often recall or reconstruct a missing entry from a few weeks back. The same gap discovered while preparing a return months later is much harder to resolve, and more likely to just get skipped or estimated.
Reconciliation catches what tracking alone misses
Even with good habits all year, small discrepancies accumulate — a missed entry, a duplicate charge, a payment logged in the wrong category. A dedicated reconciliation pass at year-end is what surfaces these before they turn into a bigger question at filing time.
Don’t let unpaid invoices carry into the new year unresolved
Outstanding balances complicate your income picture and your cash flow. Make a final push to collect what’s owed before the year closes, and if something is genuinely uncollectible, record that clearly rather than leaving it ambiguous.
Make next year’s checklist shorter
The real payoff of a clean end-of-year process is that next year’s checklist gets easier — if your ledger, receipts, and mileage log stayed current throughout the year, December becomes a final check instead of a reconstruction project.
Frequently asked questions
Why do this before year-end instead of waiting for tax season?
Because gaps are fixable in December in a way they aren't in April. A missing receipt or an uncategorized expense is easy to track down or recall a few weeks after the fact — much harder months later.
What should I do with outstanding unpaid invoices at year-end?
Chase them before the year closes if you can — both for cash flow and because unpaid invoices complicate your income picture. If genuinely uncollectible, note that clearly rather than leaving it ambiguous in your records.
Is a full reconciliation really necessary if I've been tracking things all year?
Yes — even careful tracking accumulates small discrepancies (a missed entry, a duplicate). A year-end reconciliation is what catches those before they turn into a bigger question at filing time.