Moving off Tally: what actually happens

The fear isn't that the new software won't work. It's that the changeover will break something during a GST filing month. That fear is reasonable.

8 September 2026 · 5 min read

Tally isn't bad software. It's very good at exactly what it does, which is accounting. What it doesn't do is run the other 80% of a business — quotations, service jobs, attendance, stock movement on the shop floor, follow-ups. So most companies end up with Tally plus four other things, and the same data typed into all five.

If you're thinking about moving, here's the honest version of how it goes.

What transfers cleanly

• Customer and vendor masters, with GSTIN and addresses
• Item masters, with HSN and rates
• Opening balances
• Outstanding receivables and payables
• Current stock quantities

These export from Tally to Excel and import without much drama. Budget a day, mostly for cleaning duplicates that have accumulated over the years — the same customer entered three times with three spellings.

What doesn't transfer

• Historical vouchers, in most cases. You can export them, but reconstructing years of transaction history inside a new system is rarely worth it.
• Custom TDL customisations, if someone built them for you.
• Anything that lives in your accountant's head rather than in the software.

The approach that works

Don't migrate history. Run parallel instead.

Pick a date — the start of a quarter is ideal. From that date, new transactions happen in the new system. Tally stays available, read-only, for anything historical. Your old data doesn't move, so it can't be corrupted in transit, and you can always look it up.

Run both for one full month. Yes, that means some double entry for four weeks. It's worth it, because the month tells you what's actually different — and it always is different, because every business has a habit that no software anticipated.

Talk to your CA first

This is the step people skip and then regret. Your CA has to file your returns from whatever you produce. If they open the new system in month three and don't recognise anything, you have a problem at exactly the wrong time.

Show them the invoice formats, the ledger structure and the reports before you commit. If they're comfortable, the rest is easy. If they're not, better to know in week one.

Timing

Don't switch in March. Don't switch during your busiest season. The quarter start after your peak is usually right.

How long it really takes

• Week 1: export, clean and import masters
• Week 2: raise real invoices in the new system, keep Tally running alongside
• Weeks 3–4: bring in the rest of the team — stock, attendance, service jobs
• Month 2: Tally becomes read-only reference

So roughly six weeks to be genuinely off it, with one uncomfortable month in the middle. Anyone who promises you a weekend switchover either has a very simple business or hasn't done it before.