Migrating your accounting data from one platform to another — whether it's Tally to Xero, Sage to QuickBooks Online, or spreadsheets to Zoho Books — is not something to start without preparation. A rushed migration can leave you with mismatched balances, missing invoices, or a Chart of Accounts that doesn't reflect how your business actually operates. Before you begin (or hire someone to do it for you), run through these five checks.

1. Know Exactly How Much Historical Data You Need

Not every business needs 10 years of history in the new system. Some only need the current financial year plus opening balances; others — especially those with multi-year loans, fixed assets, or ongoing legal/tax matters — need 5 to 10 years of full transaction detail. Decide this upfront, because it directly affects migration time, cost, and the size of the data set that needs validating.

A good rule of thumb: if you might ever need to pull up an old invoice or reconcile a historic bank transaction during an audit, migrate the full detail rather than just summary balances.

2. Map Your Chart of Accounts — Don't Just Copy It

This is the step most businesses skip, and it's the one that causes the most pain later. Your old Chart of Accounts was probably built years ago, has accounts you no longer use, and may not map cleanly onto how Xero, QuickBooks Online or Zoho Books expect accounts to be structured.

Before migrating, list out every account currently in use, decide which ones to keep, merge, or retire, and map each one to its new home in the destination platform. This is also the right time to clean up — a fresh start with a sensible Chart of Accounts makes every report you run afterwards more useful.

3. Reconcile Bank Accounts and Clear Outstanding Items First

Migrating with unreconciled bank accounts or a pile of unmatched transactions just carries the mess into your new system. Before migration day, reconcile every bank and credit card account up to your cut-off date, and review your list of open invoices and unpaid bills — write off anything that's genuinely uncollectable or already settled so you're not migrating stale data.

4. Confirm Your Tax Settings Match Your Jurisdiction

GST, VAT, and BAS rules differ by country, and they differ again by platform. A migration that gets the numbers right but the tax codes wrong will cause problems the very next time you file a return. Confirm before migration: which tax rates apply to which accounts, whether you're cash or accrual basis for tax purposes, and how the new platform handles your specific compliance requirements (BAS for Australia, VAT for the UK, GST for New Zealand and India).

5. Have a Reconciliation Report and a Rollback Plan

However confident you are in the migration, insist on a line-by-line reconciliation report at the end — one that shows every account balance in the old system matched against the new one. And don't delete or disable your old system until you and your accountant have had a chance to use the new one for at least one full reporting cycle.

A migration isn't "done" when the data has moved — it's done when every balance has been verified to match.

These five checks take a few hours but save weeks of cleanup later. If you'd rather have a specialist team handle the entire process — data audit, mapping, migration, and reconciliation — that's exactly what we do every day.