January arrives, and with it comes the email every small business owner dreads: your CPA asking for clean, reconciled books — and asking how much you paid each contractor last year. The businesses that answer in an afternoon are not luckier than you. They closed December properly: every balance sheet account tied to a third-party source, every accrual booked, every contractor's taxpayer ID already on file. The ones that scramble until April are not busier, either. They treated December like any other month, and the tax return inherited every shortcut.
A year-end close is the one month where "close enough" stops being close enough. Your December 31 balances become next year's opening balances, your tax return's foundation, and the figures a lender reads if you borrow. This checklist walks through the full close in six phases — record, reconcile, adjust, review, prep for 1099 season, and lock — so nothing carries forward that should not.
Phase 1: Get Every Transaction Recorded
Reconciliation cannot fix what was never entered, so the close starts with completeness. Pull every December statement — bank accounts, credit cards, payment processors, lending platforms — and confirm the year's final transaction is in your books, not sitting in an unreviewed bank feed.
Work through these in order:
- Refresh every feed and import. Sync bank and card feeds through December 31, import processor payouts (Stripe, Square, PayPal), and record any cash spending from a year-end pocket count or petty cash log.
- Categorize the uncategorized. Anything sitting in "Uncategorized Expense," "Ask My Accountant," or a suspense account must land somewhere real. Pay special attention to December: year-end software renewals, holiday bonuses, and estimated tax payments all cluster here and all get misclassified.
- Separate owner money from business money. Every owner contribution, draw, and personal charge on a business card needs to be tagged as equity movement, not income or expense. Untagged owner transactions are the single most common reason a CPA sends books back.
- Record missing bills and invoices. If a vendor did December work but has not invoiced yet, enter the bill dated in December (accrual basis) or keep a list for Phase 3. If you shipped December work you have not billed, raise the invoice now.
If you run on bank feeds with auto-categorization rules, this is the month to audit the rules themselves. A rule that has quietly booked your co-working membership to "Rent" instead of "Office Expense" all year has distorted twelve months of reports, not one.
Phase 2: Reconcile Every Balance Sheet Account
This is the heart of the close. A reconciled account is one whose book balance agrees with an independent outside source: a bank or vendor statement, a physical count, a loan statement. Walk the balance sheet top to bottom and tie out each line. Anything that does not tie gets investigated now, while December is still fresh.
Cash, bank accounts, and credit cards
Reconcile every account to its December statement, including savings, money market, and any account you consider dormant. Confirm outstanding checks and deposits in transit are real and recent — a check outstanding since March probably needs to be voided and reissued, not carried into the new year. Credit card balances should tie to the December statement, with personal charges moved to owner draws.
Accounts receivable
Run an aged receivables report and confirm every open invoice is genuinely unpaid. Write off or follow up on anything over 90 days old: carrying dead invoices inflates both revenue (accrual basis) and assets. Apply unapplied customer payments and credits — a customer with both an open invoice and an unapplied payment is a reconciliation error, not a collection problem. If you collected deposits or retainers for work not yet performed, those belong in a liability account (deferred revenue), not as a negative receivable.
Accounts payable
Age your payables and confirm every open bill is genuinely owed. Match vendor statements against your open bills, especially for your five largest vendors — a missing December bill understates expenses and overstates profit. Clear duplicate bills, which cluster at year-end when a vendor emails an invoice your feed already imported. Record any December services received but not yet billed so the expense lands in the right year.
Inventory
If you carry inventory, year-end is count time. Do a full physical count as close to December 31 as practical, value it under your consistent method (FIFO, average cost), and book the adjustment for shrinkage, damage, and obsolescence. A shrink rate that grew all year is telling you something about receiving, theft, or SKU discipline. If you use a periodic system, this count is what computes your entire year's cost of goods sold, so treat it accordingly.
Prepaid expenses and other current assets
Walk your prepaid schedule line by line — insurance, software paid annually, rent paid ahead — and confirm the remaining balance equals the future months of benefit left at December 31. Amortize what expired during the year. Review employee advances, security deposits, and other current assets for anything that should have been expensed or collected months ago.
Fixed assets and depreciation
Add every asset purchased during the year to the fixed asset register with its placed-in-service date, cost, and recovery period, and remove anything sold, scrapped, or fully retired. Then record the year's depreciation and confirm accumulated depreciation ties to the register. Decide with your CPA whether any purchase qualifies for Section 179 expensing or bonus depreciation — the election is made on the return, but the books must show which assets it covers.
Loans, credit lines, and payroll liabilities
Tie every loan balance to its year-end lender statement, split current from long-term portions, and confirm interest expense matches the lender's numbers. Reconcile payroll liabilities — withheld income tax, Social Security, Medicare, unemployment — to your fourth-quarter payroll filings; these must agree to the penny, because the IRS matches them mechanically. Reconcile sales tax payable to your filings in every state where you collect.
Equity
Confirm owner contributions and distributions for the year are complete and correctly classified, and that beginning retained earnings plus this year's net income minus distributions equals ending equity. If you added a partner, converted entity type, or made an S election this year, confirm the equity accounts reflect the new structure before the return is prepared.
Phase 3: Book Your Year-End Accrual Adjustments
Even cash-basis businesses face a few of these, and accrual-basis businesses face all of them. Adjusting entries move income and expenses into the year they belong to, regardless of when cash changed hands.
- Accrued expenses. Wages earned in the last days of December but paid in January, unused PTO that vests, unbilled contractor work, December utilities not yet billed, and interest accrued on loans through December 31.
- Accrued revenue. Work completed or goods delivered in December but not yet invoiced — if the earning event happened this year, the revenue belongs to this year.
- Prepaid amortization. The portion of insurance, subscriptions, and rent that expired during the year moves from the balance sheet to expense.
- Deferred revenue recognition. Move deposits for completed work from liability to revenue; anything still unearned stays put.
- Bad debt allowance. Record a realistic allowance for doubtful accounts — at minimum, write off invoices you have stopped pursuing.
- Inventory and asset adjustments. Shrinkage, obsolescence reserves, and depreciation from Phase 2 all land here as the actual journal entries.
Post each adjustment with a clear memo naming what it covers and which supporting schedule it ties to. In six months, "YE Adj" tells nobody anything; "Accrue Dec 29-31 wages per final payroll register" tells the whole story.
Phase 4: Review the Story the Numbers Tell
Reconciled does not yet mean reasonable. Print the full-year profit and loss next to last year and the balance sheet next to the prior year-end, and read them like a skeptical outsider.
- Variance review. For every line that moved more than about 15 percent year over year — or against your budget — find the business reason. Sometimes the reason is real growth; sometimes it is a miscategorized account that has been wrong since February.
- Margin sanity check. Compute gross margin and net margin. If gross margin swung several points with no change in pricing or suppliers, suspect a COGS classification error or a missed inventory adjustment rather than a business miracle.
- Zero and negative balances that should not be. An asset account with a credit balance, a cash account showing negative, a loan with a debit balance — each is either a real overdraft to explain or a booking error to fix.
- Related-party and fringe items. Loans to or from owners, personal use of business vehicles, health insurance paid for owner-employees — flag everything for the CPA now rather than discovering it in a March questionnaire.
- Mileage and home office. Finalize your mileage log and home office measurements while the year is fresh. Reconstructed logs are the first thing an examiner doubts.
If something looks off and you cannot explain it in two sentences, do not shrug and move on. Every unexplained balance on December 31 becomes an unexplained opening balance on January 1, and unexplained balances compound like interest.
Phase 5: Prepare for 1099 Season Before It Starts
Information-return season is where December procrastination turns into February penalties, so start the 1099 workflow during the close, not after it. The rules below cover federal filing; many states layer on their own copies and deadlines.
Chase missing W-9s now
You cannot file a correct 1099 without each payee's legal name, address, and taxpayer identification number — which is exactly what Form W-9 collects. List every contractor, freelancer, attorney, landlord, and other non-corporate payee you paid this year and confirm you hold a signed W-9 for each. Request missing ones in December, while vendors still answer your emails promptly. If a payee will not provide a TIN, the IRS generally requires you to begin backup withholding at 24 percent on future reportable payments — a mess you want to avoid, not administer.
Know which form each payment needs
- Form 1099-NEC reports nonemployee compensation of $600 or more — contractors, freelancers, and fees paid to attorneys for legal services.
- Form 1099-MISC reports rents, royalties, medical payments, and gross proceeds paid to attorneys, among other categories.
- Payments to corporations are generally exempt, with notable exceptions including attorneys' fees and medical payments. Payments made by credit card or through third-party settlement networks are reported by the processor, not by you — do not double-report them.
Note the threshold change on the horizon: for payments made in 2026 and later, the reporting threshold for 1099-NEC and most 1099-MISC boxes rises from $600 to $2,000, indexed for inflation afterward. The returns you file this coming January still use the $600 rule, so do not apply the new threshold a year early.
Calendar the deadlines
- 1099-NEC: furnish to recipients and file with the IRS by January 31 (if that date falls on a weekend or holiday, the deadline moves to the next business day — February 2, 2026, for 2025 forms). There is no later e-file deadline for NECs.
- 1099-MISC: furnish to recipients by January 31 (February 2, 2026, for 2025 forms); file with the IRS by the end of February on paper or March 31 electronically.
- Businesses filing 10 or more information returns in total must e-file; with most small businesses crossing that threshold quickly, plan on IRS IRIS or FIRE rather than paper.
Penalties for missing or incorrect returns start at $60 per return and climb the longer the error goes uncorrected, with far steeper penalties for intentional disregard — and the IRS matches every 1099 against the recipient's return automatically. Verify payee names and TINs with the IRS TIN Matching service before filing; a mismatch caught in January is a corrected W-9, while a mismatch caught by notice is a penalty discussion.
Phase 6: Lock the Year and Archive Everything
A close is not finished until the finished year cannot drift. Once the CPA has what they need — or once you have finalized the return yourself — lock the accounting period so no backdated entry can silently rewrite history. Then archive: final trial balance, full financial statements, general ledger detail, all reconciliations with their supporting statements, the fixed asset register, loan statements, payroll filings, and every 1099 and W-9. Keep business tax records at least seven years; keep asset and equity records for as long as you own the business plus seven.
Back up the data itself, too. Export a complete copy of the books to a format you can read without your current software subscription — your future self, mid-audit or mid-loan-application, should never depend on a login you stopped paying for.
Mistakes That Turn a Clean Close Into an April Fire Drill
Most year-end pain comes from a short list of repeat offenders. Check yourself against each:
- Treating the bank balance as the books. The bank shows cash movement, not accounting reality. Uncleared checks, pending transfers, and misclassified transfers mean the statement balance is almost never the book balance.
- Ignoring small differences. One unreconciled dollar is a rounding error; twelve months of unreconciled dollars is a plug figure hiding a real mistake. Clear every difference, however small, before you close.
- Waiting until tax season to start. Reconstructing December in March means lost receipts, forgotten context, and vendors who no longer remember what an invoice covered. Start the close in the first week of January at the latest.
- Trusting auto-categorization blindly. Bank-feed rules save hours and quietly misroute the unusual transactions that matter most at year-end. Review every rule's December output by hand.
- Filing 1099s from memory. "I think we paid her about $5,000" is how penalties happen. Every 1099 total should trace to a reconciled vendor ledger backed by W-9s.
Keep Your Year-End Close Boring Next December
A painful close is never really about December — it is about eleven months of small compromises arriving all at once. The businesses that close in days instead of weeks share one habit: books that stay reconciled all year, with every transaction categorized, every account tied out monthly, and every contractor's paperwork collected before the first payment. Do that, and next year's checklist becomes a short confirmation pass instead of an excavation.
Maintaining that discipline is easier when your books are transparent and version-controlled rather than locked in a black box. Beancount.io provides plain-text accounting that gives you complete control over your financial data — every entry readable, every change tracked, and AI-ready for the reviews and reconciliations above. Get started for free and make next December the calmest close you have ever had.
