Your books, moved. Your numbers, proven.

That is the standard I work to and the standard I sign off against: zero unexplained difference on the trial balance at every period end in scope. Where an exact match is genuinely impossible — certain inventory valuation differences between the two systems, for example — the difference is quantified, explained in writing, and accepted by your accountant before I call the project complete. What I will not do is quietly plug a gap to make a report look tidy.

Days for a clean-start migration of a straightforward business. Weeks for full multi-year history with inventory or multiple currencies. The scoping conversation gives you a real range within a day or two. Anyone quoting you a firm number before seeing the shape of your data is guessing.

Yes, but not in both systems at once. There is a defined cut-off after which QuickBooks is closed to new entries. Depending on scope, that window is usually short. I plan it around your month-end or year-end rather than dropping it in the middle of a period.

Considerably. Online exposes its data through a modern interface designed for this. Desktop does not — there is no single complete export, the built-in export routes truncate or omit transaction data, and genuine extraction requires a different technical approach entirely, tied to a specific Windows machine and company file. Both are entirely doable. Desktop simply takes longer and costs more, and you should be skeptical of anyone who tells you otherwise.

No, and most businesses shouldn't. See the three scope options above. Full history is the most expensive choice and frequently not the most useful one. I'd rather talk you out of it and be right than take the larger fee and watch you get less than you paid for.

I recommend retaining it in read-only form for your statutory retention period. Attachments, the audit trail and reconciliation history do not transfer to any accounting system, so QuickBooks remains your archive for those. I help you plan that retention rather than leaving you paying for a subscription nobody has thought about.

These do not migrate — not to Zoho Books, and not to any other accounting platform. This is a property of accounting systems generally, not a limitation I've chosen. I agree on an archiving approach with you during scoping so you're not surprised by it later.

Not a problem, but real additional scope. Exchange rate history, base currency adjustments, and realized and unrealized gains all need deliberate handling, and the two systems structure currency associations differently. Tell me early — it changes both the estimate and the sequencing.

Item records and quantities do. Valuation may shift, because the two systems don't necessarily apply the same costing method, and where they differ your cost of sales moves. I identify and quantify this during scoping rather than discovering it during reconciliation.

Tax configuration is set up before any transaction moves, and I reconcile tax per return period as part of the standard reconciliation — not just the trial balance. This is the area with actual legal consequences if it's wrong, and it gets treated accordingly.

Reconciled and unreconciled status does not transfer between systems. Closing balances do, and I prove them per account per period. I agree on how you'll treat historical reconciliation records during scoping.

Payroll detail does not migrate cleanly and generally shouldn't. I treat payroll as a separate workstream and discuss options during scoping — usually summary journals plus retention of the source records.

Yes, and this is a common request. I run the same reconciliation process against your existing Zoho Books organization to establish what actually landed, what didn't, and where the differences sit. You get a variance report before any remedial work is proposed, so you know the size of the problem before committing to fixing it. This is available as a standalone engagement — you're not obliged to have me do the remediation.

For a small business with a clean single-currency ledger, a short history, and no inventory, taking the clean-start option — yes, quite possibly, and the platform provides tooling for it. I'd rather tell you that than sell you something you don't need. It becomes worth bringing someone in when any of these apply: several years of history, multiple currencies, inventory, high transaction volume, a chart of accounts that has grown organically over years, or a statutory or audit requirement that the numbers demonstrably agree. The technical work is learnable. The expensive part is knowing which of a hundred small decisions will quietly break your trial balance eighteen months from now.

Almost never the migration fee. It costs the months of reconciliation work to unpick it, the restatement if it has already been reported on, and the professional fees to sort out both. The cheapest migration is the one that only happens once.

Your accountant or finance lead, against the evidence pack established in phase 3. I produce the proof; the person accountable for your books accepts it. If you'd like your external accountant involved from the start, that generally makes the project go faster, not slower.

For scoping, a set of reports is usually sufficient. For the migration itself, yes — with defined, time-limited access and a written confidentiality position. I'll set out exactly what access is needed and when, and it's removed on completion.

Not necessarily. A period end is the natural changeover point, and month-end works as well as year-end for most scopes. Waiting for a year-end that's nine months away is rarely the right call — but if yours is six weeks out, that's often worth planning around.

Reconciliation is the acceptance gate, so material issues surface before sign-off rather than after. I agree on a post-migration support window in the engagement so there's a defined route if something does emerge.