A good year end bookkeeping checklist starts in November, not in January when your accountant is already booked solid and your memory of October transactions has faded. The businesses that close the year cleanly do the same handful of jobs in the same order: reconcile every account, clean up what customers and vendors owe, get contractor paperwork ready, and organize the statements a tax preparer will ask for. None of these jobs is hard on its own. The pain comes from doing them all at once, under deadline, with missing statements.
This checklist is built for small business owners who keep their own books during the year and hand a tidy set to a CPA at tax time. Work through it one section at a time, and check each item off only when the underlying record is actually fixed, not when you have merely planned to fix it. A checklist that says done for work that is still pending is worse than no checklist at all, because it hides the gap until tax season finds it.
Year end bookkeeping checklist: reconcile every account
Start with the bank and credit card accounts. Reconcile each account month by month through the most recent closed month, and do not skip a month because it looks close: a small unexplained difference in September becomes a large one by December, and your CPA will ask about it anyway. Convert any PDF statements you have not yet imported into spreadsheets you can sort, and confirm that each statement's opening balance matches the prior statement's closing balance. For the method, see our guide on how to convert a bank statement PDF to Excel, and for the matching discipline, see our guide on how to reconcile a bank statement.
Pay special attention to the items that always cause year-end trouble: uncleared checks and deposits in transit, bank fees and interest you never categorized, personal transactions mixed into business accounts, and duplicate imports from overlapping statement periods. Clear what you can, write off what is genuinely dead with a note explaining why, and carry a short list of genuinely open items into December so nothing is forgotten. A reconciliation that ends with an unexplained plug figure is not finished, and plugging it in December only moves the problem into your tax return.
Clean up receivables, payables, and contractor data
Next, review what customers owe you and what you owe vendors. Send reminders for overdue invoices now, while customers still have budget left in the year, and decide which uncollectible balances to write off before December 31 so your income reflects reality rather than hope. On the payables side, confirm that every bill received is entered, including recurring charges that arrive by email and never reach your desk, and check that vendor balances match the statements vendors sent you.
At the same time, get contractor paperwork in order for 1099 reporting. Confirm the legal name, address, and taxpayer identification number for every contractor you paid during the year, and check that your payment totals match your books, because a 1099 that disagrees with a contractor's records creates correspondence you do not need in January. If you use a checker to review your books for duplicate or miscategorized payments, run it now, while corrections are still easy. Our 1099 checker can help you review the totals before filing season starts.
Year end bookkeeping checklist: organize statements and documents
Build one folder per account per year, and put the official bank-issued statement in it for every month, alongside the converted spreadsheet you actually worked from. Tax preparers and auditors prefer the bank-issued document over a spreadsheet you edited, so never discard the original PDF in favor of the converted file. Add loan statements, merchant processing summaries, payroll reports, and receipts for large purchases to the same folder set, and name files by account and month so anyone can find January without asking you.
Review your fixed assets and inventory while you are organizing. Note equipment bought or sold during the year, record the purchase price and date, and flag anything that needs a depreciation decision from your CPA. If you carry inventory, plan a physical count for late December and reconcile it to your books before the year closes, because an inventory adjustment made in January is far more painful than one made while the count is fresh. These two jobs take an afternoon, and they prevent the most common year-end surprises.
Meet your CPA before December 31
The most valuable item on this checklist is a short meeting with your tax preparer before the year ends, while there is still time to act on the advice. Bring your reconciled profit and loss statement, your open items list, and your questions about estimated payments, retirement contributions, and equipment purchases. A contribution or purchase made in January cannot fix a December problem, and many tax-saving moves only work if they happen inside the tax year.
Ask specifically about estimated tax payments: if your income rose during the year, your earlier estimates may now be short, and a fourth-quarter payment before January 15 can reduce underpayment penalties. Ask about owner draws versus salary if you run an S corporation, about home office and vehicle records if you claim them, and about any new forms your business type needs this year. Write the answers down, act on them before December 31, and keep the note with your year-end folder so next year's checklist starts from a better place.
Frequently asked questions
When should I start my year end bookkeeping checklist?
In November. Starting early gives you time to chase missing statements, fix reconciliations, and act on tax advice before December 31, when most planning options expire.
What is the most commonly skipped year-end task?
Reconciling the final months. Owners reconcile January through June carefully, then let the last quarter slide, and that is exactly where errors and duplicate imports hide.
Do I need original bank statements if I have spreadsheets?
Yes. Keep the bank-issued PDF as the official record and the spreadsheet as your working copy. Preparers and auditors trust the original document, not an edited file.
How do 1099s fit into the year-end close?
Confirm contractor details and payment totals in November and December, so January filing is a matter of generating forms rather than hunting for missing information.
Start this week, one section at a time, and December will feel like a normal month. If you convert statements in volume, check pricing for plans that cover more pages, and begin from the ConvertStatement home page.