An ERP delivers its full value only when it is connected. If invoices are created in the ERP but re-typed into Tally, if e-invoices are generated by uploading spreadsheets to a portal, or if e-commerce orders are copied manually into sales orders, the business is paying twice for the same data and accepting errors as a cost of doing business.
ERP integration services remove that duplication. They connect the ERP to the systems around it so that data is entered once, validated once and trusted everywhere. Our article on why ERP integration matters covers the business case in more depth; this page focuses on what we integrate and how.
Common ERP integrations for Indian businesses
The integrations below are the ones we see most often. You can also browse the integration overview on our homepage.
| System | What typically flows | Why it matters |
|---|---|---|
| Tally | Sales and purchase vouchers, ledgers, receipts, payments | Keeps accounting in Tally while operations run in ERP |
| GST e-invoicing | Invoice data to the IRP; IRN, signed invoice and QR code back | Removes manual uploads and mismatches in GSTR-1 |
| E-way bill | Consignment details (Part A) and vehicle details (Part B) | Faster dispatch with fewer data-entry errors |
| Banking | Statements, payment files, payment status | Quicker reconciliation and controlled vendor payments |
| Payment gateways | Payment links, payment confirmations, refunds | Automatic receipt posting against invoices |
| Order confirmations, dispatch updates, payment reminders | Faster customer communication from ERP events | |
| CRM | Leads, customers, quotations, orders | Sales teams see stock, pricing and order status |
| E-commerce | Orders, stock levels, prices, fulfilment status | Prevents overselling and manual order entry |
| Power BI | Transactions, masters, summarised views | Management dashboards on reliable data |
| Microsoft 365 | Email notifications, documents, user sign-in | Fits ERP into existing collaboration tools |
A note on GST, e-invoicing and e-way bill
For e-invoicing, the ERP prepares invoice data in the prescribed schema and submits it to the Invoice Registration Portal (IRP), usually through a GST Suvidha Provider or direct API access. The IRP validates it and returns an Invoice Reference Number (IRN), a digitally signed invoice and a QR code, which the ERP stores and prints. The data then flows to GSTR-1. E-way bills can be generated from the same data, with vehicle details updated in Part B.
Applicability thresholds and timelines are revised periodically, so check the latest CBIC and GSTN notifications. Our guides on ERP and GST compliance and e-invoicing automation explain the mechanics in detail. This is not tax advice; your tax advisor should confirm your obligations.
Integration patterns we use
Not every integration should be built the same way. The right pattern depends on volume, urgency and what the other system supports.
- Real-time API calls. The ERP calls an external REST API when an event occurs, such as generating an IRN when an invoice is saved. Best where the user needs an immediate result.
- Scheduled batch sync. Data is exchanged at set intervals, for example posting the day's vouchers to Tally every hour or pulling bank statements each morning. Simple and robust for high volumes.
- Webhooks and event-driven flows. External systems notify the ERP when something happens, such as a payment gateway confirming a payment or an e-commerce platform creating an order.
- File-based exchange. Some banks and legacy systems still work best with structured files. We automate generation, transfer and acknowledgement handling.
- Middleware or an integration layer. When several systems are involved, a dedicated integration service keeps mappings, retries and logs in one place instead of scattering them across systems.
Monitoring: the difference between working and reliable
An integration that works in a demo is not the same as one you can rely on at month-end. Networks drop, portals go down, credentials expire and someone enters a GSTIN with a typo. Reliable integrations plan for that from the start.
- Logging. Every message sent and received is recorded with timestamps and status, so any document can be traced.
- Retries. Temporary failures are retried automatically with sensible limits.
- Alerts. Persistent failures trigger alerts by email or WhatsApp to the right person, not just an entry in a log nobody reads.
- Exception queues. Failed records are held in a visible queue where users can correct data and resubmit.
- Reconciliation reports. Periodic checks compare totals across systems, for example ERP invoices against Tally vouchers or e-invoices against GSTR-1 data.
- Secure credentials. API keys and tokens are stored securely and rotated, never hard-coded in scripts.
Integrating a packaged ERP vs a custom ERP
With a packaged ERP, integration options depend on the APIs and connectors the vendor provides. Most modern systems offer REST APIs, though some areas may be limited or require add-ons. With a custom ERP, integration can be designed into the data model from day one, which usually makes it simpler to build and easier to maintain.
In either case, we start with a short integration assessment: which systems are involved, what data should flow in which direction, how often, and who owns each piece of data. That avoids the most common integration problem, which is two systems both believing they are the master for the same record.
How an integration project runs
- Assessment. List systems, data flows, volumes and ownership. Check API availability and credentials.
- Design. Agree field mappings, pattern (real-time, batch or event-driven), error handling and alerting.
- Build. Develop the integration with logging and retries from the outset.
- Test. Test with realistic data in sandbox environments, including failure scenarios.
- Go live and monitor. Switch on in production, watch closely for the first cycles, then hand over monitoring.
Talk to us about your integrations
Whether you need a single Tally or e-invoicing connection or a fully connected ERP landscape, the starting point is the same: understand where data is duplicated today. Book a consultation and we will map your current flows and recommend a practical integration plan.
