Year-End Close: How Books Get Ready for the CPA

It’s December 28th. The CPA has asked for the year-end financial package by January 15th to file the corporate tax return on time. The bookkeeper is partway through November’s reconciliation. December’s transactions haven’t been categorized yet. Three vendors haven’t sent W-9s. The fixed asset schedule hasn’t been updated since the equipment purchase in March. The owner is starting to do the math on what an extension would cost in interest and penalty exposure, and the math isn’t favorable.

That December scramble is what year-end close looks like for a business that hasn’t run a clean monthly close discipline through the year. The work that should have been spread across twelve monthly close cycles compresses into eighteen days. Some of it gets done. Some of it gets done quickly enough that errors are likely. The CPA package goes out late or imperfect, and the tax filing carries more risk and cost than it would have if the close had been routine.

The mechanics of year-end close aren’t complicated, but the volume of work is real, and the deadline is statutory. A business that runs the discipline well finishes the year with books that flow directly into the tax return. A business that doesn’t pays for the gap in CPA fees, late filings, and the kind of errors that show up months later when the IRS sends a notice.

What year-end close actually accomplishes

Year-end close moves the books from “transactions through December 31” to “complete and accurate set of records the CPA can use for tax filing and the business can use for the new year.” The specific outputs:

• All transactions through year-end recorded and categorized
• All accounts reconciled to source statements
• All accruals and adjustments posted (depreciation, prepaid expenses, accrued expenses, etc.)
• All AR aged, with bad debt write-offs identified
• All inventory counted (if applicable) and adjusted
• All fixed assets inventoried and depreciated
• Year-end equity adjustments (owner draws, distributions, retained earnings) posted
• Trial balance produced and reviewed
• Financial statements (P&L, balance sheet, cash flow) generated for the full year
• 1099 reporting prepared and filed
• W-2 reporting prepared and filed
• CPA package assembled with all supporting documentation

The Internal Revenue Service’s recordkeeping guidance frames year-end close as the moment when the prior year’s books become permanent record. Changes after the close are still possible (amended returns, corrected statements) but they cost more and create complications that close-time accuracy avoids.

The standard timeline

A reasonable year-end close cadence:

The cadence isn’t optional. The deadlines are statutory. A business that builds the cadence into its annual rhythm finishes the work without scrambling; a business that doesn’t faces the same workload compressed into less time.

The accruals and adjustments

Year-end requires posting entries that capture economic activity straddling the year boundary. The common ones:

• Depreciation expense: capital assets purchased during the year get depreciated; the annual depreciation entry recognizes the cost
• Prepaid expenses: insurance paid in advance, software paid annually, rent prepayments; the portion of the prepayment used during the year converts from prepaid asset to expense
• Accrued expenses: expenses incurred but not yet paid (December utilities billed in January, accrued payroll for the days between the last paycheck and December 31, accrued interest)
• Accrued revenue: revenue earned but not yet billed (work completed in late December, invoiced in January)
• Bad debt write-off: receivables determined to be uncollectible
• Inventory adjustments: physical count compared to book balance, with adjustments for shrinkage or counting errors
• Year-end bonuses or commissions: amounts earned in the closing year but paid in the new year

The American Institute of Certified Public Accountants’ guidance on accrual accounting frames these adjustments as the difference between cash basis simplicity and accrual basis accuracy. A business on accrual basis posts these adjustments to align income and expense with the periods in which the activity occurred. A business on cash basis still tracks several of them (depreciation specifically) for tax purposes regardless of accounting method.

Fixed asset and depreciation schedule

The fixed asset schedule lists every capital asset the business owns: equipment, vehicles, buildings, leasehold improvements, software (in some cases). Each asset has:

• Acquisition date and cost
• Useful life (for depreciation)
• Depreciation method (straight-line, accelerated, Section 179 expensing, bonus depreciation)
• Accumulated depreciation through the prior year
• Current year depreciation expense
• Net book value (cost minus accumulated depreciation)

Year-end requires updating this schedule for any acquisitions, disposals, or accumulated depreciation through the closing year. The IRS’s depreciation guidance (Publication 946) frames the rules; the schedule is what the CPA uses to support the depreciation deduction on the tax return. A schedule that’s accurate and current makes the CPA’s work straightforward; a schedule that’s outdated or incomplete requires reconstruction at higher cost.

1099 preparation in detail

The 1099-NEC (for non-employee compensation) and 1099-MISC (for various other payments) requirements catch many small businesses unprepared at year-end. The work to prepare:

• Identify every contractor and vendor paid more than $600 during the calendar year
• Confirm a W-9 is on file for each (request if missing)
• Confirm the payment classification (services to non-corporate vendor triggers the requirement; payments via credit card or third-party network are reported by the processor on Form 1099-K, not by the business)
• Generate 1099-NEC for non-employee compensation
• Generate 1099-MISC for rent, royalties, attorney payments to corporations, and other applicable categories
• Distribute to recipients by January 31
• File with the IRS by January 31 (electronic filing required for businesses with 10+ information returns)

A business that maintains W-9 collection discipline at the front end of vendor onboarding (addressed in detail in a separate guide on accounts payable and vendor management) catches the requirement automatically. A business that scrambles for W-9s in January often spends days chasing vendors and may miss the filing deadline.

The CPA package

The package the CPA needs to prepare the tax return typically includes:

• Trial balance as of December 31 (every account with its ending balance)
• General ledger for the year (every transaction in every account)
• Profit and loss statement for the year
• Balance sheet as of December 31
• Cash flow statement for the year
• Bank statements and reconciliations for all accounts
• Loan statements showing balances and interest paid
• Fixed asset schedule with depreciation
• Payroll reports (Forms 941, 940, W-3)
• 1099 reporting (1099-NEC, 1099-MISC summary)
• Major contracts for material commitments
• Asset acquisitions and disposals during the year
• Any unusual transactions with explanation

The Small Business Administration’s small business resources frame the CPA package as the deliverable that determines how much CPA time the tax preparation takes. A complete, organized package produces a faster and less expensive engagement; an incomplete package extends the engagement and produces higher fees.

What separates clean close from scrambled close

The difference between a business that closes the year cleanly and one that scrambles isn’t the volume of work. The volume is roughly the same. The difference is when the work gets done:

• Clean close: monthly close discipline through the year means each month’s transactions are reconciled and categorized when they happen; year-end requires only the year-specific adjustments (depreciation, accruals, 1099 generation)
• Scrambled close: monthly close was deferred or skipped; year-end requires catching up twelve months of work plus the year-end adjustments, all in eighteen days

A business doing roughly $1M in revenue with disciplined monthly close typically completes year-end work in 20-40 hours of bookkeeper time across January. The same business without monthly close discipline often requires 100+ hours compressed into the same window, with corresponding error risk and stress.

The pre-close checklist

A short reference for the work that should happen by mid-December:

• All bills received through November entered and categorized
• All bank and credit card statements through November reconciled
• All AR through November reviewed, with collection actions in motion
• W-9s confirmed on file for all 1099-eligible vendors
• Fixed asset schedule current through prior year
• Owner compensation (draw, salary, distribution) decisions for the year finalized
• Any year-end bonus or commission accruals identified
• Inventory count scheduled (if applicable)
• CPA contacted to confirm timing and any specific requirements
• Any year-end planning decisions (entity structure, retirement contributions, equipment purchases) made before December 31

The checklist isn’t elaborate. It surfaces the items that take time at year-end so they can be handled before the December crunch.

When extension makes sense

Some businesses extend their tax filings rather than rushing close in eighteen days. The trade-offs:

• Extension benefits: reduces year-end pressure, allows more thorough close, gives time to handle complex situations (asset sales, restructuring, multi-state issues)
• Extension costs: extends the window of uncertainty, requires estimated tax payment with the extension, potential interest accrual if the estimated payment was light
• Extension limits: extends filing, not payment; underpayment of taxes still accrues penalty and interest

A business that consistently struggles with the timeline and consistently extends should probably either improve the close discipline or formalize the extension as a planned approach with timely estimated payments. A business that extends only occasionally for specific reasons handles the year-end timing flexibly.

The December 28 scramble revisited

The business in the scenario at the top has options. Push hard through the next two weeks (and pay for the rush in fees and error risk). File for an extension (and pay any underpayment penalty if estimated tax was light). Accept that this year’s close will be imperfect and commit to monthly close discipline for the new year (so next year’s close isn’t a scramble).

The third option is the only one that addresses the underlying pattern. Most businesses that face the December scramble have faced it before. The specific transactions are different each year; the structural issue (close discipline deferred through the year) is the same. The investment in monthly close discipline pays back in the year after the investment, and the years after that, in lower CPA fees, lower error risk, and the absence of the scramble that the calendar produces every December for businesses without the discipline.

• IRS: Recordkeeping for Small Business
• AICPA: Year-End Close Procedures
• SBA: Manage Your Finances