Every catch-up bookkeeping quote answers a question you never asked: how expensive is it to have a human read eight months of bank transactions? The honest market answer is "quite," because that is genuinely how the work gets done at most services: a bookkeeper, an export of your feeds, and a lot of hours.
This guide gives you the real 2026 numbers first, because you should know what the market charges before deciding anything. Then the part most pricing guides can't tell you: what the same backlog costs when an AI agent does the transaction volume inside your own QuickBooks and a human only handles the judgment calls.
The Market Rates, By Months Behind
Published pricing from catch-up services and firm guides clusters tightly:
| How far behind | Typical total cost | Typical timeline |
|---|---|---|
| 1 to 3 months | $300 to $500 | Days to a week |
| 4 to 6 months | $500 to $1,500 | 1 to 2 weeks |
| 7 to 12 months | $1,500 to $3,500 | 1 to 3 weeks |
| Over a year | $3,500 to $8,000+ | Several weeks |
| Multi-year, with structural problems | $2,000 to $13,000 | 1 to 8 weeks |
Those bands line up across sources (SDO CPA's cost guide and Certum's cleanup pricing are representative), and most small businesses with six to twelve months of backlog land somewhere in the $800 to $2,500 range.
What Actually Drives the Quote
Four things move you inside (or past) those bands:
- Transaction volume. The single biggest factor. Two hundred transactions a month costs more to reconstruct than forty, roughly linearly, because a human is reading each one.
- Account count. Every bank account and credit card is another set of statements to reconcile month by month.
- Payroll and sales tax. Filings tie to the books; a gap that spans them costs more than one that doesn't.
- Wrong versus missing. This is the quiet multiplier. A file where nothing was recorded is a catch-up; a file where things were recorded badly needs cleanup first, and cleanup and catch-up are different jobs that most neglected files need in sequence.
Worth knowing when you read quotes: "catch-up" that skips reconciliation isn't done. Categorized isn't done; reconciled is done.
The DIY Math, Honestly
Doing it yourself costs zero dollars and a real number of hours: roughly four to eight hours per quarter of backlog for a simple, low-volume business, and dramatically more once cleanup is involved. Owners more than six months behind routinely report sixty-plus hours where a professional would have spent two weeks of elapsed time. The cash saving is real; the deadline risk and the string of lost weekends are also real. DIY is a reasonable answer at one to three months behind with clean books and no payroll, and an increasingly bad one after that.
The Third Option: An Agent Does the Volume
Here is the structural observation the pricing table hides: most of what you're paying for is reading, matching, and data entry, which is exactly the work an AI agent does well, and most of what makes the books trustworthy is judgment and review, which stays human either way.
DeepLedger splits the job along that line. An AI agent (Claude, ChatGPT, or any MCP client you connect) works inside your own QuickBooks Online through 26 structured, permissioned, logged tools. Pointed at a backlog, it:
- Diagnoses the file first: how many uncategorized transactions per month, which accounts stopped reconciling and when, what's stale in AR and AP.
- Works oldest month first: categorizes each transaction against your QuickBooks history, records what it can defend with a written rationale, and escalates everything uncertain as a task carrying its proposed category, confidence, and evidence.
- Learns from your corrections: every fix is written to memory as policy, so January might escalate forty items and April escalates nine. The catch-up accelerates as it goes, which is precisely the property a backlog needs.
- Closes each caught-up month: six steps, sixteen checks, and a Close Sheet you sign, which is what turns "I think we're caught up" into statements a lender or tax preparer will accept.
The cost shape is a subscription, not an engagement: $20 per month per company plus the Claude or ChatGPT plan you likely already have, or $150 per month for the hosted always-on agent, with the first month free and no credit card required. Your real spend is review time: a file a few months behind is typically an evenings-of-review project rather than a four-figure invoice, with the step-by-step workflow covered in our cleanup guide.
And unlike sending the books away, nothing leaves. The work happens in your QuickBooks under a connection you can revoke, with both audit trails intact, which matters more than it sounds if you've read what happens when a bookkeeping service holds your ledger and disappears.
When Paying a Human Is Still Right
Three honest cases:
- Judgment-heavy wreckage. Prior-year adjustments that touch filed returns, entity restructuring mid-gap, inventory or accrual work that needs professional decisions every month. The agent escalates these organized rather than solving them; if the gap is mostly judgment calls, a professional should be in the loop regardless of who does the data entry, and the agent workflow makes that engagement cheaper, not unnecessary.
- Nobody will review. The agent model requires someone, even briefly, approving escalations. If "I never want to see the books" is a hard requirement, an outsourced service is the honest product for you; just price in the custody questions.
- Not on QuickBooks Online. The agent works your QuickBooks file. Books trapped in a proprietary ledger need importing first, which any destination requires.
Frequently Asked Questions
Why do quotes vary so much for the same backlog? Because "months behind" is a poor proxy for hours of work. Volume, account count, payroll, and how much existing work is wrong drive the hours; two twelve-month backlogs can differ by 5x in effort.
Do I need catch-up bookkeeping before filing taxes? You need complete, reconciled books for the filing year, so if the gap overlaps it, yes in substance. Tax preparers charge a premium (or decline) when handed a shoebox, so the catch-up usually pays for itself at filing time.
Will the agent handle the months before my bank feed connects? Yes: connect the feed for current data and import CSV or Excel statements for the older months. Recorded items carry a marker, so a transaction arriving twice (import plus feed) can't be booked twice.
What if some documents are missing? Missing paper gets flagged, not guessed at. The agent lists the transactions that need support so you can chase documents in parallel with the categorization work.
DeepLedger puts a supervised AI agent inside your own QuickBooks Online: it reads the backlog, records what it can defend, escalates what it can't, and ends every caught-up month with a close you sign. The first month is free, no credit card required, and it is conveniently catch-up month.
Start your catch-up at deepledger.ai or follow the step-by-step cleanup guide.