Year-End Invoicing Checklist
Year end is when invoicing sloppiness compounds into tax errors. A focused checklist — run once, in an afternoon — closes the year cleanly and hands your accountant (or your January self) books that reconcile. Here is the list.
Close Out Open Invoices
Run an aging report and chase everything overdue — invoices paid in December versus January can change which tax year the income falls in, depending on whether you use cash or accrual accounting. For genuinely uncollectible invoices, write them off formally with documentation rather than letting them linger into the new year.
Confirm all December work is invoiced before the cut-off. Under accrual accounting, work performed in December is December revenue even if invoiced in January — but invoicing promptly keeps the records aligned and avoids missed income.
Verify Numbering and Completeness
Check your invoice sequence for the year: every number accounted for as issued, voided (with reasons recorded), or credited. Gaps without explanation are exactly what auditors ask about. Do the same for credit notes if you number them separately.
Reconcile total invoiced revenue to your accounting system's sales figure and to bank deposits. The three should tie together; differences usually reveal unrecorded invoices, data-entry errors, or deposits posted to the wrong account.
Tax Cut-Off and Accruals
Apply your cut-off correctly: under accrual accounting, record invoices for work done but not yet billed as accrued revenue, and do not record January work in December. Under cash accounting, only paid invoices count — but still invoice December work promptly so nothing slips a full year.
Gather the documents your tax return needs: total sales, tax collected per rate, bad-debt write-offs, and any cross-border transactions with their special treatments. Doing this in December beats reconstructing it in March.
Set Up the New Year Right
Decide your numbering for the new year — continuing the sequence or restarting with a year prefix (2027-001) — and configure it before the first January invoice. Review payment terms, late-fee policies, and rate cards; year end is the natural moment to raise prices or tighten terms with proper notice.
Archive the closed year's records securely with backups, and confirm retention periods are met. Then start January with reconciled books, clear terms, and an empty overdue list — the closest thing invoicing has to a fresh start.
Frequently asked questions
Should invoice numbering restart each year?
Either works — continuous numbering is simplest, while a year prefix (2027-001) makes archiving and searching easier. What matters is no gaps, no duplicates, and configuring it before the first invoice of the year.
Does it matter if December work is invoiced in January?
For cash accounting, income counts when paid, so timing shifts the tax year. For accrual accounting, the work date governs, but you should still record an accrual. Either way, invoice promptly — delays only create confusion.
How do I handle bad debts at year end?
Write off invoices you have genuinely given up collecting, with documentation of your collection attempts. This supports the bad-debt deduction and cleans your receivables. Do not write off invoices you are still actively chasing.
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