The short answer: The first 90 days with an outsourced accounting firm run in 3 phases. Access and onboarding take days 1–14, cleanup and handoff days 15–60, and the first fast close days 61–90. In the worked example below, a file 7 months behind reaches a business-day-7 close by its third monthly close, down from day 16 on the first.
- Grant access in week 1. Every missing login adds days to the cleanup, not to the firm’s calendar.
- Cleanup comes before the recurring close; a close built on unreconciled months carries the old errors forward.
- The prior bookkeeper’s handoff is a document list, not a phone call. Ask for it in writing.
- Expect the first full monthly package around day 45–60, and a close inside 5–7 business days by the third monthly close.
Last updated October 2026.
Hiring the firm is the easy part. The first quarter decides whether the engagement produces trustworthy numbers or a second set of stale books. Most of what slows that quarter sits on the client side of the table.
This guide sets out the 3 phases, the access and documents each one needs, and a worked timeline for a company 7 months behind. It also covers the handoff from a previous bookkeeper and what a realistic first close looks like.
How does onboarding with an outsourced accounting firm work?
Onboarding with an outsourced accounting firm moves through access, cleanup, and a first close, in that order. Each phase has a defined output, and the next one cannot start cleanly until it lands.
| Phase | Days | Client provides | Firm delivers |
|---|---|---|---|
| 1. Access and onboarding | 1–14 | Logins, prior returns, chart of accounts, a named contact | Written diagnostic with counts of unreconciled months and uncoded transactions |
| 2. Cleanup and handoff | 15–60 | Answers to open questions within 2 business days | Every account reconciled through the cutoff month, suspense at $0.00 |
| 3. First fast close | 61–90 | Month-end approvals and receipts on a set date | A monthly package on a committed business day |
The diagnostic at the end of phase 1 is the contract for phase 2. It turns “the books are a bit behind” into a count that can be scheduled.
What access and documents does the client provide?
The client provides system access, prior-year tax returns, and the documents that explain balances nobody can trace. Access granted in week 1 keeps the cleanup on schedule.
A typical access list covers 6 systems. They are the general ledger (QuickBooks Online or Xero, as an accountant user), read-only bank and card portals, payroll, Bill.com or another payables tool, the payment processor, and the cap table. The firm also needs the last 2 filed returns, loan agreements, and any lease or customer contract above a set threshold.
Tax access is a separate authorization. Per the IRS, Form 8821 lets a taxpayer “Authorize any individual, corporation, firm, organization, or partnership you designate to inspect and/or receive your confidential information verbally or in writing for the type of tax and the years or periods listed on the form.” With the notice-copy box checked, the firm can receive notices and transcripts without routing every letter through the founder.
Access controls deserve their own review; our guide to outsourcing data security and SOC 2 lists the questions to ask.
How much historical cleanup is typical, and how long does it take?
Cleanup length depends on months behind and transaction volume, so it should be quoted from a diagnostic. A file 2 months behind can be current in 2–3 weeks; one 7–12 months behind usually needs 5–8 weeks.
The diagnostic should name 4 figures, and those figures set the schedule:
- The last month every account tied to a statement
- The number of unreconciled account-months
- The balance in Uncategorized or suspense
- The count of uncoded transactions
Cleanup ends when the proof exists, not when the calendar says so. A reasonable standard is every bank, card, and loan account reconciled to the statement through the cutoff month, with a schedule of dated adjusting entries. The full sequence appears in our catch-up bookkeeping guide, and the scope a firm should commit to is covered in what a QuickBooks cleanup service delivers.
How does the handoff from a previous bookkeeper work?
The handoff works best as a written request list with a deadline, sent before the prior bookkeeper’s last day. Verbal walkthroughs rarely survive the first reconciliation.
Ask for 7 items in writing:
- Admin transfer of the QuickBooks Online file
- Reconciliation reports for each account
- Open accrual and prepaid schedules
- The fixed-asset and depreciation schedule
- Unresolved vendor or customer disputes
- Payroll and sales-tax filing calendars
- Any login held in a personal name
Ownership matters here. The file and every subscription should sit in the company’s name, because the records outlive any provider. The IRS rule reads: “Keep employment tax records for at least 4 years after the date that the tax becomes due or is paid, whichever is later.” General records run 3 years. The period rises to 6 years if unreported income exceeds 25% of the gross income shown.
What does a 90-day onboarding timeline look like? A worked example
Consider an illustrative services company with $6.2M in annual revenue. Its books are 7 months behind across 9 bank, card, and loan accounts, with 2,100 uncoded transactions and $48,300 in suspense.
That is 9 accounts × 7 months = 63 account-months to reconcile. At a review pace of 350 coded transactions a week, the 2,100 transactions take 6 weeks. Cleanup therefore runs from day 15 to roughly day 57, inside the phase-2 window, and the first close opens inside the 90 days.
| Close | Business day delivered | Main constraint |
|---|---|---|
| Month 1 (first close) | Day 16 | New bank rules, first accrual review |
| Month 2 | Day 11 | Late receipts from 2 approvers |
| Month 3 | Day 7 | Steady state |
The close drops from day 16 to day 7, a cut of 9 business days, or 56% (9 ÷ 16 = 0.5625). The suspense balance falls from $48,300 to $0.00 before the first close opens.
When should you expect the first complete monthly financial package?
Expect the first complete package roughly 45–60 days in, once cleanup reaches the cutoff month. A package delivered sooner on unreconciled books is a draft, whatever its label.
A complete package has 4 parts. They are a fully reconciled balance sheet, an accrual-basis income statement, a cash flow statement, and short variance commentary against the prior month. Founders raising capital may add a cash runway line and a headcount schedule.
The first package also sets the format for every later one. Agree on the layout, the delivery day, and the sign-off owner before month 1 closes. The review sequence an outsourced team follows is set out in what month-end close looks like with an outsourced team.
How quickly can the monthly close reach 5–7 business days?
Most companies can reach a 5–7 business-day close by the third month after cleanup, provided approvals and receipts arrive on a fixed date. The constraint is usually the client calendar, not the firm’s capacity.
Three habits drive the speed. Bank and card feeds are reconciled weekly rather than once a month. Accruals follow a standing schedule. Approvers commit to a cutoff, such as receipts by business day 2.
Under the Continuous Close Method™, reconciliations run as transactions post, so month-end becomes review rather than catch-up. Aaron Ressel reviews each new client’s first close packet before it ships. Day-by-day sequencing appears in the five-day close calendar, and peer timing in month-end close benchmarks by company size.
Once the close is steady, the recurring work follows the monthly bookkeeping routine after cleanup. The full scope of the service is described on our outsourced startup bookkeeping page.
Sources: IRS, About Form 8821, Tax Information Authorization; IRS, How long should I keep records?
Frequently asked questions
How does outsourcing bookkeeping and accounting work day to day?
The firm works inside the company’s own QuickBooks Online or Xero file as an accountant user. Bank and card activity is coded and reconciled weekly, and open questions go to a named client contact. The month closes on a committed business day with a financial package and short variance notes.
What happens during onboarding with an outsourced accounting firm?
Onboarding runs in 3 phases over about 90 days. Access and a written diagnostic take days 1–14, cleanup and the prior bookkeeper’s handoff days 15–60, and the first fast close days 61–90. Each phase has a defined output before the next one starts.
What access and documents does the client need to provide?
Accountant-user access to the general ledger, read-only bank and card portals, payroll, payables, the payment processor, and the cap table. Add the last 2 filed tax returns, loan agreements, and material contracts. A signed Form 8821, with the notice-copy box checked, lets the firm receive IRS notices and transcripts.
How long until the books are caught up and current?
It depends on months behind and transaction volume. A file 2 months behind can be current in 2–3 weeks; one 7–12 months behind usually needs 5–8 weeks. A written diagnostic counting unreconciled account-months and uncoded transactions should set the schedule.
How quickly can the monthly close get to 5–7 days?
Most companies reach a 5–7 business-day close by the third month after cleanup. Weekly reconciliations, a standing accrual schedule, and a fixed receipt cutoff such as business day 2 do most of the work. In the worked example, the close fell from day 16 to day 7.
