1. Check what you have
Licence and TSS status, release version, number of companies, data size and every customisation in use.
Your ERP 9 data stays intact
Upgrade from Tally.ERP 9 to TallyPrime
Your company data converts, your customisation gets reviewed, and nothing switches until the figures in TallyPrime match the figures you have today.
The part that actually goes wrong
Migrating Tally data is not technically difficult. Tally Solutions built the conversion and it works. Almost every migration that goes badly goes badly for one of three reasons, and none of them is the conversion itself.
- Someone migrated the only copy. The conversion is one-way. Done on a copy, that is irrelevant. Done on the original with no verified backup, it is a very bad afternoon.
- Customisation was assumed to carry over. TDL written for Tally.ERP 9 generally needs adjusting. Finding that out after the switch, when invoices will not print in the right format, is the classic migration overrun.
- TSS had lapsed and nobody checked. You cannot move to the current release without it, so what was meant to be an upgrade becomes a renewal negotiation first.
All three are avoidable by looking before moving. That is most of what the first conversation is for.
How we run it
Five steps, and you switch only at the last one
2. Back up and verify
A backup taken and confirmed restorable. Not assumed — actually tested before anything else happens.
3. Migrate a copy
TallyPrime installed alongside your existing setup and your company data converted into it, with ERP 9 still running.
4. Reconcile the figures
Trial balance, stock valuation and key reports compared against your live system. Discrepancies resolved before, not after.
5. Switch and orient
Users move across at a quiet point in your month, with a short walkthrough of what has changed in navigation.
Afterwards
Customisation reinstated and tested, backups reconfigured, and TSS tracked so the next release is not another scramble.
Why bother upgrading
Three reasons that are not just “it is newer”
E-invoicing arrives through product updates. Fawtara becomes mandatory from 1 April 2027 for businesses above OMR 5 million in annual supplies and 1 October 2027 for the rest. Statutory support reaches you through releases, which means a current version and active TSS.
Support for older releases thins out. The further behind you are, the fewer people can help and the more a problem costs to resolve.
The day-to-day is genuinely faster. Go-to search, reports you can alter without leaving the screen, and simpler multi-tasking. Minor individually; noticeable across a finance team over a month.
- Your existing licence upgrades if TSS is active
- Accounting logic unchanged — experienced users adapt quickly
- Customisation reviewed before you commit, not after
Find out where your licence actually stands
Send us your Tally serial number and we will tell you your TSS position, what the upgrade costs and what your customisation needs — before you decide anything.
FAQ
Tally.ERP 9 to TallyPrime questions
Can I upgrade from Tally.ERP 9 to TallyPrime?
Yes. TallyPrime is the current release from Tally Solutions and your Tally.ERP 9 company data migrates into it. TallyPrime installs alongside rather than replacing ERP 9, so your existing setup stays intact while the migrated copy is checked. If your TSS is active the upgrade is covered; if it has lapsed, it has to be renewed before you can move to the current release.
Will I lose any data in the migration?
Not if it is done properly. The migration converts a copy of your company data into the TallyPrime format — vouchers, masters, opening balances and history come across. The risk is never really the conversion; it is working on the only copy you have. We take a verified backup first, migrate the copy, and reconcile the figures against your live system before anyone switches over.
Is the migration reversible?
The data conversion is one-way — a company migrated to TallyPrime does not open again in Tally.ERP 9. That is exactly why the original stays untouched. You keep working in ERP 9 until the TallyPrime copy has been checked and signed off, and only then do you switch. Your ERP 9 data remains readable the whole time.
What happens to our TDL customisation?
Customisation does not migrate automatically. TDL written for Tally.ERP 9 generally needs adjusting for TallyPrime, and some older customisation is simply better rebuilt than patched. We review what you run first and tell you which is which before quoting — finding this out halfway through a switchover is how migrations overrun.
Do I need to buy a new licence for TallyPrime?
No, if you hold a valid Tally.ERP 9 licence with active TSS — the upgrade to TallyPrime is included. If your TSS has lapsed you renew it to come up to the current release, and Tally may add a reactivation charge depending on how long it has been expired. We check your serial and tell you the exact position before you commit.
Is TallyPrime very different to use? Will staff need retraining?
The accounting logic is the same, so an experienced Tally user is productive quickly. What changes is navigation — TallyPrime has a different top bar, a go-to search, and reports that can be altered without leaving the screen. Most teams need a short orientation rather than full retraining, and we run it on your own company data.
How long does a migration take?
For a single company with clean data and no customisation, it is usually a day including checks. Larger jobs are driven by three things: data size, how many companies you run, and how much customisation needs rework. We scope those before giving you a date, and we schedule the switch for a quiet point in your month rather than mid-close.
Should we upgrade before the Fawtara e-invoicing deadlines?
Yes, and with time to spare. E-invoicing support reaches Tally through product updates, which means being on a current release with active TSS. Leaving the upgrade until the mandate applies to you turns two separate projects into one rushed one. See Oman e-invoicing and TallyPrime for which phase applies to your business.
Can you migrate data from a different accounting package?
Often, yes — from spreadsheets, Peachtree, QuickBooks or an older custom system. It is a different exercise to a Tally-to-Tally upgrade: masters and opening balances are mapped and imported rather than converted, and the quality of what you have decides the effort. Send us a sample and we will tell you honestly what is realistic.
We are several versions behind. Does that make it harder?
Usually not for the data itself. Older Tally.ERP 9 releases migrate to TallyPrime in the same way. What a long gap does affect is TSS — a subscription lapsed for years costs more to bring current — and customisation, which is more likely to need rebuilding. Both are things we price up front rather than discover later.