What should a bookkeeper hand a CPA at year end? Six things, and a firm can grade any incoming file against them in about twenty minutes. That twenty minutes is the highest-margin work your practice does in January, because it decides whether a 1040 or an 1120-S takes three hours of preparation or eleven hours of forensic cleanup billed at a rate the client already thinks is too high.
This is written as a gate sequence, not an explainer. Each gate has a pass condition and a branch. Run a file through all six, and by the end you know exactly which of three buckets it belongs in: prepare it now, send it back with a specific list, or move the bookkeeping somewhere it will be done right before next January. You can forward this page to a client’s bookkeeper verbatim and it functions as the standard.
Gate 1: Are the books reconciled through year end, or just closed?
Closed and reconciled are different words. A file is closed when someone stopped entering transactions. A file is reconciled when every bank, credit card, loan, and merchant account has a completed reconciliation report dated 12/31 with an uncleared-items list you can read.
Pass condition: reconciliation reports for every cash and card account through 12/31, with the ending balance agreeing to the December statement, and an uncleared list you can age.
- If reconciliations exist and the uncleared list is short and recent → proceed to Gate 2.
- If reconciliations exist but the uncleared list contains items older than 90 days → do not accept it. Stale uncleared deposits are almost always duplicate revenue; stale uncleared checks are almost always expenses recorded twice or never actually issued. Ask for the aged detail and a written disposition before you touch the return.
- If the reconciliation was “forced” with a balancing entry → find it. In QuickBooks Online it shows up as a Reconciliation Discrepancies account or an opening balance equity plug. A forced reconciliation is a signed statement that the books do not tie to reality, and the plug is usually sitting in an account nobody will look at again.
- If there are no reconciliations → the engagement is not tax preparation. It is catch-up bookkeeping wearing a tax return as a disguise, and it should be scoped and staffed that way before a single form is opened.
One detail worth insisting on: reconciliations through 12/31 for every account, including the loan and line-of-credit accounts. Interest expense that nobody split from principal is the single most common reason a Schedule L will not balance, and it is far cheaper to catch in the handoff than at 11 p.m. on March 14.
Merchant accounts deserve the same treatment as banks. When Stripe, Square, or a payment platform deposits net of fees and the bookkeeper records only the deposit, revenue is understated by the entire year of processing fees and the expense line never appears. Ask whether gross settlement reports were reconciled or whether the bank feed was simply categorized. The answer tells you a great deal about the rest of the file.
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What should a CPA see in the year-end balance sheet tie-out packet?
Bookkeepers are trained to make the P&L look reasonable. Preparers live on the balance sheet, because that is where the errors hide and where the return actually gets built. The tie-out packet is the difference between a file you can rely on and a file you have to re-audit.
For each of these, the handoff should include the supporting document, not an assertion:
- Cash — December statement for each account.
- Accounts receivable — the 12/31 A/R aging, with the total agreeing to the balance sheet line, and a note on anything over 120 days.
- Accounts payable — the 12/31 A/P aging, same test.
- Inventory — the count sheet or valuation summary behind the number, with the method stated. A balance that moved only by a plug entry is not an inventory balance.
- Loans and notes — the December lender statement or amortization schedule showing the year-end principal balance, so you can prove the interest split rather than assume it.
- Credit cards — December statement, with the balance shown as a liability rather than netted into expenses.
- Payroll liabilities — a year-end liability report from the payroll system showing what was accrued and unremitted at 12/31.
- Sales tax payable — the Q4 return and the balance it leaves behind.
- Equity — a roll-forward of contributions, distributions, and prior-year net income. For partnerships this is a starting point only; tax-basis capital reporting has been mandatory on Form 1065 since tax year 2020, and a book-basis roll-forward never satisfies it on its own.
The branch: if three or more of these have no supporting document, stop grading and treat the balance sheet as unverified. Reconstructing it is a separate scope with a separate fee conversation, and the worst version of this is doing it silently inside a fixed tax fee.
There is a quiet tell here that experienced preparers watch for. If the balance sheet has a line called “Ask My Accountant,” “Uncategorized Asset,” or an opening balance equity figure that is not zero in year three of the business, the bookkeeper has been routing anything confusing into a holding pen all year. That balance is not a mystery to solve in March. It is a list the bookkeeper should have written down in December, which is exactly what Gate 6 requires. For clients who want to understand what these statements are supposed to show in the first place, our plain-English walkthrough of small business financial statements is a useful companion to send along.
Should payroll agree to the W-3 before the year-end handoff?
Yes, and the W-3 is the best control total in the entire package, because a third party generated it and the SSA already has a copy. Form W-3 Box 1 wages, tips, and other compensation should reconcile to the general ledger’s gross wage expense after two adjustments: subtract wages accrued at 12/31 that were paid in January, and account for pre-tax deferrals that reduce Box 1 but not book wage expense. If the bookkeeper hands you a one-page reconciliation showing that math, they know what they are doing.
Same test for the 941s: the four quarterly returns should sum to the W-3 totals for wages and withholding. When they do not, the cause is usually a bonus run posted outside the payroll system, an owner draw miscoded as wages, or an S-corp officer health insurance adjustment that hit the W-2 but never hit the books.
- If W-3, 941s, and the ledger agree → payroll is done. Move on.
- If they disagree by an amount that traces to a known item → get the trace in writing, in the memo, and move on.
- If they disagree and nobody can say why → the S-corp reasonable compensation position, the retirement plan deduction, and the employer credit calculations are all sitting on top of an unverified number. Resolve it before the return, not after.
For firms that also see a lot of contractor-heavy clients, the same discipline applies to classification, which is a separate exposure from the arithmetic. Our breakdown of payroll and contractor compliance rules covers the tests a preparer should already be asking about before signing.
Did the bookkeeper actually file the 1099s, or only prepare them?
“We took care of the 1099s” means nothing without confirmations. The handoff should contain the filing confirmation numbers, the recipient list, and the W-9 file — not a spreadsheet titled 1099 draft final v3.
Two mechanics matter more than they used to. First, the threshold: according to the IRS, filers who submit 10 or more information returns in the aggregate during a calendar year must file them electronically. Aggregate is the trap. A client with six Forms 1099-NEC and five Forms W-2 is at eleven and over the threshold, even though neither stack would cross it alone. Second, the calendar: Forms 1099-NEC and W-2 are due January 31, while Form 1099-MISC runs later. Our note on the 1099 filing deadline lays out the dates a client’s bookkeeper should be working backward from in December, not discovering on January 28.
Ask for the W-9s specifically. A missing TIN is the difference between a routine filing and a backup withholding problem, and information return penalties escalate on a schedule — a modest per-return amount if corrected within 30 days, climbing several times higher once corrections slip past August 1, with a substantially steeper tier for intentional disregard. That is a cost the client will eventually attribute to whoever they talked to last, which is usually your firm.
One more item to require in the memo: the 1099-K reconciliation. The reporting threshold reverted to more than $20,000 and more than 200 transactions, so processor deposits recorded in the books frequently exceed what any 1099-K reports. The bookkeeper should explain the gap. If they cannot, they are not reconciling the merchant account, they are just importing it.
What fixed-asset schedule should a bookkeeper hand a CPA in January?
The most common version of this deliverable is useless: a general ledger line reading Equipment — $41,388. What a preparer needs is a schedule with one row per asset and five columns: description, vendor, invoice date, placed-in-service date, and cost including freight and installation.
The placed-in-service date is not a formality. It drives eligibility, and depreciation rules moved recently — 100% bonus depreciation was restored for qualified property acquired after January 19, 2025, and the Section 179 expensing limit rose to $2.5 million with a $4 million phaseout. Those are return-level decisions that cannot be made from a lump-sum ledger balance. Confirm current-year figures and any state decoupling against IRS Publication 946 before you apply them.
Invoice-level detail matters for a second reason. A client without an applicable financial statement can elect the de minimis safe harbor under Reg. 1.263(a)-1(f) to expense items up to $2,500 per invoice or per item. You cannot apply a per-item election to a pooled balance. A bookkeeper who understands the handoff keeps small-dollar purchases separated all year precisely so the election stays available in January.
Also require the disposal list. Assets sold, traded, or thrown away with no journal entry sit on the depreciation schedule for years, quietly overstating basis and creating a gain calculation nobody can defend. A one-line note per disposal — what left, when, and what was received for it — costs the bookkeeper a minute in December and saves an hour of reconstruction in March.
What should the year-end open-questions memo from a bookkeeper contain?
This is the item that separates a professional handoff from a data dump, and it is the one almost nobody sends. The memo is one to two pages listing every judgment the bookkeeper made that a preparer might reverse, every transaction they could not classify, and every question only the owner can answer.
A good memo contains, at minimum:
- Uncategorized or suspense-account transactions with amounts and dates, listed individually.
- Owner transactions the bookkeeper coded to draws or loans and the reasoning behind each. If an owner is taking distributions from an S corporation with no wages running, flag it here rather than letting the preparer discover it on the trial balance. Our decision tree on how to pay yourself as a small business owner is the version to send the client when that conversation starts.
- Anything crossing the personal-business line: the vehicle, the home office, the phone, the travel that looked like a family trip.
- Large or unusual items — a new loan, an equipment trade, an insurance settlement, a credit-related balance still sitting in the file.
- Accounting-method notes: what is on cash, what is on accrual, and where the two are mixed. If a method change is in play, that is a Form 3115 conversation, not a bookkeeping entry.
- What changed since last year in the chart of accounts, and why.
When this memo arrives, your preparer stops guessing and starts asking targeted questions. When it does not, your staff spends January inventing questions from ledger detail — the least efficient work in a tax practice and the work clients resent paying for most. If you want a companion document to send clients directly, our small business tax preparation checklist covers the owner’s side of the same handoff.
What should your firm do when a year-end file fails the gates?
Grade every incoming file 0–6 on the gates above. The score, not the client relationship, should pick the branch.
- 5–6 gates passed → prepare the return. Send a short note naming the one item that fell short so next January is cleaner.
- 3–4 gates passed → return it with a specific, itemized list and a date. Vague requests produce vague files. “Send the 12/31 A/R aging, the December lender statement, and the placed-in-service dates for the three equipment purchases” produces what you need.
- 0–2 gates passed → this is not a documentation problem, it is a bookkeeping problem, and it will recur every January until the bookkeeping function changes. The firm now has three real options: absorb the cleanup at partner-adjacent cost during the worst weeks of the year, decline the engagement, or move the books to a dedicated back office and keep the tax work.
That third option is the one most firms underuse, usually because they conflate it with giving up the client. It is the opposite. The firm keeps the relationship and every piece of tax work; the bookkeeping hours — the lowest-margin, highest-headache hours on the schedule — move to a partner whose entire job is delivering a file that passes all six gates. That is the arrangement we run for firms through Turnkey CFO’s CPA firm partnerships: we run the books all year and hand back a tax-ready package in January. We never prepare, review, or sign a return. The return is yours.
Two governance points before you structure anything. If a referral fee is part of the arrangement, section 1.520 of the AICPA Code of Professional Conduct requires that it be disclosed to the client, and it prohibits commissions and referral fees outright for any client where the firm performs attest services. State boards layer their own rules on top, and some are stricter than the Code. Confirm the specifics with your state board and your professional liability carrier before you sign a partnership agreement — that is a compliance question for your own advisors, not something a bookkeeping partner should be advising you on.
How do you turn the year-end handoff gates into a standing January standard?
The firms that run smooth Januaries send this list in October, not January. A bookkeeper who knows in October that a W-3 reconciliation and a placed-in-service schedule are expected will build them in December. A bookkeeper who learns in January that they were expected will produce something rushed, and your staff will verify it anyway.
Make it a document. Six gates, one page, sent from the firm to every bookkeeper touching a client file, with a date certain for delivery. Attach two things to it: the exact file names and formats you want, and the name of the person at your firm who receives them. Handoffs fail on logistics as often as on substance — a complete package sitting in a shared drive nobody checks is functionally a package that never arrived.
Then grade what comes back and let the score decide the branch. Track the scores by client for two seasons and a pattern appears that no partner meeting would have surfaced: a handful of relationships generate most of the January cleanup, and they are rarely the largest clients. Once you can name them, the fix stops being a scheduling problem and becomes a decision about where the bookkeeping should live. That single page does more for realization on your compliance work than any pricing change, because it moves the cleanup out of the six weeks when your hours are worth the most.
Frequently asked questions
What should a bookkeeper hand a CPA at year end, at minimum?
Six items: reconciliation reports for every account through 12/31, a balance sheet tie-out packet with third-party support, payroll agreed to Form W-3 and the four 941s, filed 1099s with confirmation numbers and W-9s, an invoice-level fixed-asset schedule with placed-in-service dates, and a written open-questions memo.
Is a closed set of books the same as reconciled books?
No. Closed means someone stopped entering transactions. Reconciled means every bank, card, loan, and merchant account has a completed reconciliation dated 12/31 that agrees to the December statement, with an uncleared-items list you can age. Ask for the reports, not the assertion.
Why does a CPA need invoice-level fixed-asset detail instead of a ledger total?
Because placed-in-service dates and per-invoice amounts drive bonus depreciation, Section 179, and the de minimis safe harbor election. A pooled balance like "Equipment $41,388" cannot support a per-item election or a mid-year rule change. Confirm current figures with your CPA.
What if the client's bookkeeper says the 1099s were handled?
Ask for filing confirmation numbers, the recipient list, and the W-9 file. A draft spreadsheet is not evidence of filing. Also confirm the aggregate count of information returns, since 10 or more across all form types triggers mandatory electronic filing.
Can a CPA firm outsource bookkeeping and keep the tax work?
Yes, and it is common. The firm keeps the client and every piece of tax work while an outside back office runs the books and delivers a tax-ready file. If referral fees are involved, disclosure rules under the AICPA Code and your state board apply; talk to your state board and your attorney.
When should a firm send this checklist to bookkeepers?
October. A bookkeeper who knows in October that a W-3 reconciliation, an A/R aging, and a placed-in-service schedule are expected will build them in December. One sent in January produces a rushed file your staff has to verify anyway.