Home › Enterprise services › SAP to Tally migration services
Moving off SAP and onto Tally Prime is an accounting project, not a file export. The risk is never "can the data move" — it is whether your trial balance still ties out afterwards.
The usual assumption is that businesses only ever grow into SAP. In practice a steady number of Indian companies move the other way, and for sound reasons:
| Area | What it involves | Where it usually goes wrong |
|---|---|---|
| Chart of accounts | SAP GL accounts, cost centres and profit centres mapped onto Tally groups and ledgers | Many-to-one mappings collapse detail that management reporting still needs |
| Master data | Customers, vendors, items, units, tax masters, bank accounts | Duplicate vendors under different SAP codes merging silently in Tally |
| Opening balances | Trial balance as at cutover, plus party-wise and item-wise breakups | Balances that net to zero at group level but are wrong ledger by ledger |
| Open items | Outstanding receivables and payables with original bill references for ageing | Losing bill-wise detail, which destroys the ageing report on day one |
| Transaction history | An agreed number of prior years, posted as vouchers in Tally | Scope creep — "let us bring everything" doubles the project for data nobody queries |
| Statutory history | GST returns data, TDS deductions and certificates, e-invoice/e-way references | Tax codes that have no clean Tally equivalent and need a rule, not a lookup |
| Inventory | Item masters, stock quantities and valuation at cutover | Valuation method differences (moving average vs FIFO) producing a different closing stock value |
For a single legal entity with a clean cutover at a financial year or quarter boundary, plan on four to ten weeks. The phases matter more than the headline number:
| Phase | Typical duration | What you get |
|---|---|---|
| 1. Discovery & extraction design | 3–5 days | Inventory of what exists in SAP, agreed scope and cutover date |
| 2. Chart-of-accounts mapping | 1–2 weeks | A signed mapping sheet — the single most important document in the project |
| 3. Extraction & transformation | 1–2 weeks | SAP data pulled and shaped into Tally XML import format |
| 4. Trial load & reconciliation | 1–2 weeks | Tally trial balance reconciled against SAP, differences explained line by line |
| 5. Parallel run | 2–4 weeks | Both systems posting; reports compared before anyone commits |
| 6. Cutover & sign-off | 2–3 days | Final differential load, SAP frozen for posting, finance signs off |
Multiple legal entities, multiple years of history, or heavy custom Z-reports extend this. So does dirty source data — and every SAP system that has run for a decade has some.
We price this as a project, because effort tracks the shape of your data, not the number of people who will log in. The drivers are:
A single-entity migration with opening balances and one to two years of history sits at the lower end. Multi-entity with long history and inventory sits materially higher. We quote a fixed project fee after discovery, so the number does not move once work starts. Ask for a scoping call and we will give you a range on the call itself.
We do not ask anyone to take that on trust. Reconciliation is a deliverable, not a promise:
TACHY is a Patna-based software company. We build our own school, college and university ERP, and we run an enterprise services practice around data migration, reconciliation and automation — which is the same discipline applied to other people's systems. We have delivered a complete SAP-to-Tally migration for an Indian manufacturing group, covering chart-of-accounts remapping, opening balances and trial-balance reconciliation: read how that project ran.
Quoted after discovery, not revised mid-project.
An audit-ready document, not a verbal assurance.
You verify before you commit.
GST, TDS and e-invoicing handled as first-class concerns.
For a single legal entity with a clean cutover, four to ten weeks end to end, including a two to four week parallel run. Multiple entities, several years of transaction history, or heavy inventory complexity extend it. The chart-of-accounts mapping and the reconciliation phases take the most calendar time, not the data transfer itself.
No, provided it is in scope. GST output and input records, TDS deductions and e-invoice or e-way references are migrated and then reconciled against your filed returns for the periods carried. This matters for assessment cover, so we treat statutory history as a required deliverable rather than an optional extra.
Yes, and for many companies that is the right call. Starting Tally with a reconciled opening trial balance, open receivables and payables with bill-wise detail, and current stock is faster and cheaper, while SAP is kept read-only for historical reference. We will size both options during discovery so you can compare them.
Differences are expected during the trial load — that is the point of doing one. Every difference is investigated and listed with a cause, typically an unmapped ledger, a tax-code mismatch or a valuation-method difference on stock. Nothing is netted off or written to a suspense account to make the report look clean, and sign-off only happens once the remaining differences are explained and accepted.
Yes. SAP Business One migrations follow the same method as ECC — mapping, extraction, trial load, reconciliation, parallel run, cutover — and are usually smaller in scope because the source system is simpler. The same applies to migrations from other ERPs and from Excel-based books.
A 30-minute scoping call: we look at your system, your ledger count and your history, and tell you honestly what the work involves and what it will cost.
Request a scoping call WhatsApp +91 84348 01033