Year End Accounting Checklist

Year End Accounting Checklist: 12 Items to Work Through

What Year End Actually Closes
Why December Work Determines January Stress
How to Sequence the Work
12 Items on a Year End Accounting Checklist
Case Study: A Denver Firm That Started in October
Frequently Asked Questions

Introduction

A year end accounting checklist exists to stop December work becoming March panic. Most of what makes filing difficult is not complexity, it is incompleteness discovered too late to fix calmly.

The businesses that find year end straightforward are not doing anything clever. They are working through a list in December that the rest leave until their accountant asks in February.

This guide covers what year end closes, how to sequence the work, and twelve items that between them cover almost everything that causes problems later.

1. What Year End Actually Closes

Year end finalises the accounting period so figures can be reported externally. Accruals are posted, balances confirmed, and the books locked so nothing shifts after filings are based on them.

The difference between a business that closes the year and one that merely stops recording is whether the balance sheet has been verified. Profit and loss gets attention. The balance sheet is where errors accumulate quietly.

Area	What year end requires	Typical timing
Bank and card accounts	Reconciled to 31 December	Early January
Receivables	Aged and bad debts assessed	Late December
Payables	All invoices received recorded	Early January
Inventory	Physical count, dated	31 December
Fixed assets	Additions and disposals recorded	Late December
Payroll	Final run reconciled to returns	Early January

2. Why December Work Determines January Stress

January carries hard deadlines. 1099 forms, W-2 forms and fourth quarter filings all fall within weeks of each other, and none of them wait for a business that is still reconciling November.

The second reason is information availability. Vendor details, contractor addresses and missing receipts are far easier to chase in December than in late January when everyone else is doing the same.

Quarterly estimated tax payments also settle at year end. Getting the final quarter right depends on knowing the actual position rather than estimating from a partial year, which IRS estimated tax guidance assumes you can do.

1099 forms are due to recipients in late January, with no practical extension
Missing vendor details take weeks to chase once everyone is busy
Inventory counts must be dated at year end and cannot be done retrospectively
Final estimated payment is more accurate when the year is actually closed

3. How to Sequence the Work

Start in November with the items that depend on other people. Vendor information, contractor W-9 forms and anything requiring a third party takes longer than the work you control.

Then reconcile, then accrue, then review. Doing it in that order means each step builds on completed work rather than being revisited.

November: chase W-9 forms, vendor details, outstanding customer invoices
Early December: reconcile through to end November, clear coding backlog
Late December: inventory count, fixed asset review, bad debt assessment
Early January: final reconciliation, accruals, close and lock, which is what is account reconciliation delivering at year end
Mid January: 1099 and W-2 preparation, fourth quarter filings

4. 12 Items on a Year End Accounting Checklist

Work through in order. Items one to four depend on other people, so start those first.

Collect W-9 Forms From Every Contractor

Anyone paid as a contractor during the year needs a current W-9 on file before 1099 preparation begins. Chasing these in late January is the single most common cause of missed deadlines.

Verify Vendor and Customer Details

Addresses, tax identification numbers and legal entity names. Incorrect details on a 1099 create correction filings, which cost time and sometimes penalties.

Chase Outstanding Customer Invoices

Collection is easier before year end than after. It also determines which balances need assessing as potentially bad, which affects the reported position.

Confirm All Supplier Invoices Are Recorded

Invoices received in December for work done in December belong in the year regardless of payment date. Missing these understates costs and overstates profit.

Reconcile Every Account to 31 December

What is account reconciliation achieving at year end is confirmation that the closing position is real. An unreconciled account carries an error forward into the new year where it becomes harder to find.

Count Inventory and Date the Count

A physical count with working papers, dated at year end. Valuation calculated backwards from sales is not a count and will not be accepted as substantiation.

Review Fixed Assets

Record additions, remove disposals, and confirm depreciation has been applied. Assets sold or scrapped but still on the register distort the balance sheet indefinitely.

Assess Bad Debts

Receivables that will not be collected should be written off in the year they became uncollectable, not carried forward. Carrying them overstates assets and delays the deduction.

Post Accruals and Prepayments

Costs incurred but not yet invoiced, and payments made covering future periods. This is where cash basis and accrual basis genuinely diverge and where most year end adjustments live.

Reconcile Payroll to Filed Returns

Total wages in the ledger must agree to quarterly returns. A discrepancy here surfaces in W-2 preparation and is far easier to correct in January than after forms are issued.

Review Owner Transactions

Draws, loans and personal expenses paid by the business need clear recording. Undocumented owner activity is the most frequently questioned area in a small business examination.

Close, Lock and File

Lock the period so nothing shifts after filings are based on it. Audit ready bookkeeping depends on this step, because a period that can still be edited is a period whose figures cannot be relied upon.

A complete year end accounting checklist ends here, with the prior year closed and the new one opening from a verified position.

5. Case Study: A Denver Firm That Started in October

What Eight Weeks of Lead Time Was Worth

A professional services firm in Denver had spent three consecutive Januarys in crisis, chasing contractor details and reconciling nine months of backlog while 1099 deadlines approached.

In the fourth year they began in October. Nothing about the work changed, only when it started.

Measure	Prior years	Year with lead time
W-9 forms outstanding at 15 January	14	0
Months unreconciled at 1 January	9	0
1099 corrections filed	6	0
Accountant fees for year end	$11,200	$3,400
Owner hours in January	60+	8
Filing deadline met	Twice late	On time

The saving was $7,800 in fees and roughly fifty owner hours, from doing identical work eight weeks earlier. The firm now treats the October start as a fixed calendar item rather than a good intention.

6. Frequently Asked Questions

1. What should a year end accounting checklist include?

Collecting W-9 forms, verifying vendor details, reconciling every account to 31 December, counting inventory, reviewing fixed assets, assessing bad debts, posting accruals, reconciling payroll to filed returns, documenting owner transactions, and locking the period.

2. When should year end work start?

Items depending on other people should start in November, particularly W-9 collection and vendor detail verification. Reconciliation and accruals follow in December and early January. Starting in January means competing with every other business for the same information.

3. What are the main January deadlines?

1099 forms must reach recipients in late January, with filing deadlines shortly after. W-2 forms follow the same pattern. Fourth quarter payroll returns and the final quarterly estimated tax payment also fall in this window.

4. Do I need an inventory count at year end?

If the business holds stock, yes, and it must be a physical count dated at year end with working papers retained. A valuation calculated from sales records is not a count and will not satisfy substantiation requirements.

5. How do quarterly estimated tax payments affect year end?

Quarterly estimated tax payments for the final period are more accurate once the year is actually closed, because the position is known rather than projected. Closing promptly also informs planning for the following year’s instalments.

6. Should the books be locked after year end?

Yes. Audit ready bookkeeping requires that a closed period cannot be edited without a deliberate adjusting entry. An open period means figures that filings relied upon could change afterwards, which undermines every report built from them.

Conclusion

Year end is not difficult work. It is ordinary work with a deadline attached, and the businesses that find it painless are simply the ones that started earlier.

Explore our bookkeeping services, read how to be audit ready, or our month-end close checklist. Employers should also see our payroll services.

Ask us to run your year end.

About the Author

Saloni Modi | Senior Accountant, Finkeepers
Qualified accountant with over a decade advising US small businesses on period close and compliance deadlines. Estimated tax guidance referenced here is published by the IRS.

Disclaimer

This article provides general guidance for educational purposes only. Filing deadlines and requirements vary by entity type, state and circumstance. Always consult a qualified CPA before relying on this content for filing decisions. Last updated October 2026.

Year End Accounting Checklist