ERP migration
Field-level mapping, validation, and rollback between TallyPrime and Epicor Prophet 21. We move data and schema; workflows are rebuilt natively in Epicor Prophet 21.
TallyPrime
Source
Epicor Prophet 21
Destination
Compatibility
8 of 14
objects map 1:1 between TallyPrime and Epicor Prophet 21.
Complexity
BStandard
Timeline
10-14 weeks
Overview
Moving from TallyPrime to Epicor ERP is a migration from a desktop accounting file with no API to a cloud-native ERP with full REST and Bulk API access. The core challenge is that TallyPrime stores all data in proprietary local .xml/.dat files rather than a database server, so we extract via Tally's built-in XML and JSON export functions, transform the chart of accounts, and load into Epicor company structures in dependency order: currencies and UoMs first, then ledgers, then parties, then inventory items with BOMs, then vouchers. We preserve GSTIN-linked party data, ITC opening balances, and the last-filed GSTR period reference as opening ledger entries in Epicor. Epicor's BOM and multi-location inventory model replaces Tally's Godown-stock mapping, requiring a structural transform for manufacturers. TDL customizations, workflows, and GST filing history on the GST portal do not migrate; we deliver a written inventory of TDL features requiring manual rebuild in Epicor and a GST portal re-onboarding checklist for the customer's compliance team.
Every standard and custom field arrives verified.
AI proposes the map; you confirm before any record moves.
Parent–child, lookups, and ownership stay linked.
Calls, emails, meetings — with original timestamps.
Documents, uploads, and inline notes move with the record.
Why teams make this switch
Leaving
What's pushing teams away
Choosing
What's pulling them in
Object mapping
Each row shows how a TallyPrime object lands in Epicor Prophet 21, including any object-level transformations, lookup resolution, or schema-design dependencies.
Typical mapping — final map is confirmed during the sample migration step.
TallyPrime
Company
Epicor Prophet 21
Company (Epicor Multi-Company)
1:1Each TallyPrime Company maps to an Epicor Company entity with its own fiscal year configuration, base currency, and Chart of Accounts. We extract company name, GSTIN, mailing address, and fiscal year start/end from the Tally company master, then create corresponding Epicor Company records. If the destination is a single Epicor tenant with multiple companies, inter-company voucher handling requires Epicor elimination journal configuration post-migration.
TallyPrime
Ledger
Epicor Prophet 21
GL Account
1:1TallyPrime Ledgers map to Epicor GL Accounts within the destination Chart of Accounts. We preserve the ledger hierarchy (Groups and Sub-groups), GST classification (GST rate applicability, nature of supply), and opening balances as GL Account period-opening entries in Epicor. Tally's Cost Categories and Profit Centers map to Epicor Business Unit and Segment dimensions respectively, which are configured as reporting dimensions in Epicor's Financial Reporting module rather than as ledger-level fields.
TallyPrime
Voucher
Epicor Prophet 21
AR Invoice, AP Invoice, Journal Entry, Payment, Receipt
1:manyTallyPrime Vouchers split by voucher type: Sales and Credit Note vouchers map to Epicor AR Invoice; Purchase and Debit Note vouchers map to Epicor AP Invoice; Receipt vouchers map to AR Receipt; Payment vouchers map to AP Payment; Contra, Journal, and non-trade vouchers map to Epicor Journal Entry. Voucher date sequencing is preserved; we apply a cutoff-date filter so that the last closed period in TallyPrime flows into the first open period in Epicor without balance gaps.
TallyPrime
Inventory Item (stock item)
Epicor Prophet 21
Part Master
1:1TallyPrime Stock Items map to Epicor Part Master records. We carry forward HSN/SAC codes, opening quantity, opening rate, and opening value. Tally's Track as Asset flag becomes a Part Type classification in Epicor. For non-BOM stock items, the mapping is direct. For manufactured items with BOMs in TallyPrime (where BOM is tracked manually via stock item relationships), we transform to Epicor Part BOM structures during migration.
TallyPrime
Godown
Epicor Prophet 21
Warehouse / Bin Location
1:manyTallyPrime Godowns map to Epicor Warehouses and Bin Locations in a two-level structure. Each Godown becomes a Warehouse; if TallyPrime Godowns have sub-locations or sections, these map to Bin Locations within the warehouse. We export the Godown-stock mapping to populate Epicor PartBin records so that opening stock positions are correct per location at go-live.
TallyPrime
Bill of Materials (BOM)
Epicor Prophet 21
Part BOM
lossyTallyPrime does not have a native BOM module; BOM is typically managed via stock item relationships or manual records. We audit the customer's BOM practices during scoping and, where BOM data exists in Tally, transform it into Epicor Part BOM structures with the manufactured Part as the header and component Parts as lines with quantity-per and bom-seq. This requires a configuration phase in Epicor Data BPM before import because BOM creation involves header, detail, and revision records.
TallyPrime
Party (Customer and Vendor)
Epicor Prophet 21
Customer, Supplier, or Prospect
1:manyTallyPrime Parties with GSTIN and party type of Sundry Debtor map to Epicor Customer; party type of Sundry Creditor maps to Epicor Supplier. We preserve GSTIN, PAN, mailing address, contact details, credit limits, and opening receivables/payables as Epicor Customer or Supplier financial records. Party-specific Tally features like TCS/ TDS applicability are stored as custom fields or tax jurisdiction rules in Epicor.
TallyPrime
Unit of Measure
Epicor Prophet 21
UOM Class and UOM Code
1:1TallyPrime UoMs map to Epicor UOM Class (grouping, e.g., Length, Weight, Volume) and UOM Code entries within each class. Compound UoMs such as 'dozen boxes' are split into component units during transformation. We export the full UoM list during the master-data phase and create corresponding Epicor UOM records before any Part or voucher import that references them.
TallyPrime
Currency
Epicor Prophet 21
Currency and Exchange Rate
1:1TallyPrime multi-currency definitions and historical exchange rates extract to Epicor Currency records and Exchange Rate tables. We apply the applicable rate at each voucher date by matching the voucher exchange rate from TallyPrime's voucher log to Epicor's exchange rate effective-date table. Multi-currency voucher amounts in foreign currencies become Epicor transactions with the appropriate currency and exchange rate references.
TallyPrime
Voucher Type
Epicor Prophet 21
Document Type + EpiTransaction Type
lossyTallyPrime voucher types with customized numbering series, print layouts, and approval workflows are documented and mapped to Epicor Document Types. We flag any voucher type with custom TDL-driven behavior (customized invoices, auto-calculations) as a manual-rebuild item in the handoff document. Standard voucher types (Sales, Purchase, Receipt, Payment, Journal) map to Epicor equivalents without configuration work.
TallyPrime
Bank and Cash Ledger
Epicor Prophet 21
Bank Account, Cash Account
1:1TallyPrime bank and cash ledgers with IFSC codes, account numbers, and cheque configurations map to Epicor Bank Account records. Cheque printing configurations are documented for manual rebuild in Epicor's payment printing setup. Bank reconciliation data (cheque numbers, dates, matching status) is preserved as Epicor Payment Apply records for open items at cutover.
TallyPrime
Fixed Asset
Epicor Prophet 21
Asset Master
1:1TallyPrime fixed assets tracked via stock items with 'Track as Asset' flag map to Epicor Asset Master records. We export asset register data including book value, accumulated depreciation, depreciation method, and last depreciation date, and create Epicor Asset records with corresponding depreciation books. TallyPrime depreciation books map to Epicor Depreciation Calculation methods.
TallyPrime
Budget
Epicor Prophet 21
Budget or Custom GL Analysis
lossyTallyPrime Budget records linked to ledgers with periodic or YTD control values map to Epicor GL Budget records where the customer's Epicor edition supports budget management. If the destination Epicor tier does not include budget management natively, we store budget data as custom GL Analysis records and deliver the budget matrix as a structured import template for the customer's admin to load post-migration.
TallyPrime
GST Compliance Data
Epicor Prophet 21
Tax Configuration (Jurisdiction Rules, ITC Ledger)
1:1TallyPrime e-Invoice JSON, GSTR-1, and GSTR-3B filing references and ITC opening balances carry forward as opening ledger entries and tax jurisdiction rules in Epicor. The GST portal maintains the authoritative filing record, so the last-filed period GSTR reference number is documented as the cutover boundary. Epicor has no native Indian GST module; customers operating in India typically use a third-party GST add-on (e.g., Tally GST Bridge or Zoho Tax) for ongoing compliance filing. We provide a GST re-onboarding checklist for the customer's compliance team.
| TallyPrime | Epicor Prophet 21 | Compatibility | |
|---|---|---|---|
| Company | Company (Epicor Multi-Company)1:1 | Fully supported | |
| Ledger | GL Account1:1 | Fully supported | |
| Voucher | AR Invoice, AP Invoice, Journal Entry, Payment, Receipt1:many | Fully supported | |
| Inventory Item (stock item) | Part Master1:1 | Fully supported | |
| Godown | Warehouse / Bin Location1:many | Fully supported | |
| Bill of Materials (BOM) | Part BOMlossy | Fully supported | |
| Party (Customer and Vendor) | Customer, Supplier, or Prospect1:many | Fully supported | |
| Unit of Measure | UOM Class and UOM Code1:1 | Fully supported | |
| Currency | Currency and Exchange Rate1:1 | Fully supported | |
| Voucher Type | Document Type + EpiTransaction Typelossy | Fully supported | |
| Bank and Cash Ledger | Bank Account, Cash Account1:1 | Fully supported | |
| Fixed Asset | Asset Master1:1 | Fully supported | |
| Budget | Budget or Custom GL Analysislossy | Fully supported | |
| GST Compliance Data | Tax Configuration (Jurisdiction Rules, ITC Ledger)1:1 | Fully supported |
Gotchas + challenges
Platform-specific issues from each side, plus the pair-specific challenges that don't show up on either platform's page on its own.
TallyPrime gotchas
TallyPrime data lives in proprietary local files, not a database
TDL customizations are version-specific and not portable
GST filing history exists on the GST portal, not in Tally
Multi-company inter-company vouchers require explicit mapping
Corrupted company data is a known migration blocker
Epicor Prophet 21 gotchas
Third-party bolt-on integrations complicate migration scope
Dirty data without standardized processes compounds migration risk
SDK customizations and BPMs may not survive platform upgrades
Report-based export only for non-technical users
Per-user pricing model requires accurate user count before migration planning
Pair-specific challenges
Migration approach
Scoping, discovery, and Tally TDL audit
We conduct a structured discovery covering the TallyPrime data file (version, release, customization layer), company count and inter-company voucher scope, ledger count and GST classification distribution, voucher volume and date range, inventory item count with BOM complexity assessment, godown structure, party master completeness, and the last-filed GST period. We also audit the TDL layer to identify which features are driven by custom code versus native Tally functionality, as TDL-driven voucher formats or report layouts require manual rebuild documentation. The discovery output is a written migration scope document with data quality baseline, Epicor edition recommendation, and a TDL features handoff list.
Epicor environment setup and schema design
We work with the customer's Epicor implementation partner to configure the Epicor tenant: create Company entities (mapped one-to-one from TallyPrime companies), build the Chart of Accounts with the appropriate segment structure, configure UOM classes and currency definitions, and set up warehouse locations (mapped from TallyPrime Godowns). For manufacturing clients, we create Part BOM structures in Epicor Data BPM before inventory import. For multi-company destinations, we configure inter-company elimination rules and reporting structures. All schema design is validated in an Epicor test environment before production migration begins.
Data extraction from TallyPrime files
We run TallyPrime's native XML and JSON export functions from within the live Tally installation, sequencing master-data exports first (UoMs, currencies, ledgers, parties, inventory items, fixed assets, voucher types) followed by transactional voucher exports ordered by date. We apply a cutoff-date filter to ensure the last closed accounting period in TallyPrime aligns with the opening period in Epicor. Any TDL custom exports required for BOM data or non-standard voucher formats are run separately. All exports are validated against TallyPrime's built-in Trial Balance and Stock Summary reports before proceeding to transformation.
Data transformation and cleansing
We run data through a structured transformation layer: ledger hierarchy maps to Epicor GL Account segments, voucher types map to Epicor Document Types, stock items with Godown links map to Epicor Part records with PartBin locations, BOM data transforms to Epicor Part BOM header-detail structures, and GSTIN party data validates against GST portal format before Epicor import. Duplicate party records (same GSTIN under different names) are merged or flagged for customer decision. Opening balances for all ledgers, GST ITC, and stock positions are reconciled against the TallyPrime Trial Balance and Stock Summary as a final pre-load validation before Epicor ingestion.
Epicor production migration in dependency order
We load Epicor in record-dependency sequence: UOM classes and UOM codes first, then currencies and exchange rates, then GL Accounts, then Bank Accounts and Cash Accounts, then Customer and Supplier records (with GSTIN validation), then Part Master records, then PartBin records (stock per warehouse), then Part BOM structures, then open AR and AP balances as Journal Entries, then historical vouchers by date range, then Fixed Assets, then Budget records. Each phase emits a row-count and balance-reconciliation report; the customer's finance team signs off on the Trial Balance match against the TallyPrime source before the next phase begins.
Cutover, balance validation, and TDL rebuild handoff
We freeze TallyPrime data entry at a defined cutover date, run a final delta export for any records modified during the migration window, and load the delta into Epicor before go-live. Post-migration, we reconcile the Epicor Trial Balance against the final TallyPrime Trial Balance, verify GST ITC opening balances in the Epicor tax ledger, confirm stock positions by warehouse against the TallyPrime Stock Summary, and validate AR/AP aging against the TallyPrime outstanding reports. We deliver the TDL features inventory (custom reports, invoice layouts, integrations) with recommended Epicor equivalents for the customer's admin and Epicor implementation partner to rebuild. We do not rebuild TDL customizations, configure Epicor GST add-ons, or rebuild workflows as part of standard migration scope.
Platform deep dives
TallyPrime
Source
Strengths
Weaknesses
Epicor Prophet 21
Destination
Strengths
Weaknesses
Complexity grading
Standard ERP migration. 2 of 8 objects need a mapping; the rest are 1:1.
Overall complexity
Standard migration
Derived from compatibility, mapping clarity, API constraints, and data volume across TallyPrime and Epicor Prophet 21.
Object compatibility
2 of 8 objects need a mapping; the rest are 1:1.
Field mapping clarity
Field mapping is derived from defaults — final spec confirmed during the sample migration.
Timeline complexity
8-object category — typical timelines run 2–7 days end-to-end.
API constraints
TallyPrime: Not publicly documented.
Data volume sensitivity
TallyPrime doesn't expose a bulk API — REST + parallelization used for high-volume runs.
Estimator
Rule-based pricing — no per-record fees, no manual quotes. Migrations over 2M records are scoped individually.
Step 1
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FAQ
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