GST-compliant vouchers, RCM and contractor billing
17 voucher types behind one posting path — from everyday receipts and payments to GST reverse charge and the contractor-specific bills a generic accounting package does not have.
Accounting Software · GST Compliance · Construction & Trading
Built
2026
Timeline
Actively developed through 2026 · live in production, updated continuously on a live server
The RCM (Reverse Charge Mechanism) voucher — Indian GST self-invoicing built as a first-class voucher type instead of a manual adjustment.
What it does
Capabilities
10 voucher types, one posting path: Receipt, Payment, Journal, Sub-Contractor Bill, Transportation Bill, Construction Purchase Bill, Bill Wise Receipt, Cheque Return, RCM Voucher, Bank Book Updation.
RCM voucher handles GST self-invoicing — no side spreadsheet needed.
Sub-contractor and construction bills built for how contractors actually invoice.
Every voucher auto-numbered, sequential, tied to company and financial year.
Bank Book Updation reconciles against real bank movement, on its own.
Every posting lands in one ledger — no side doors, no gaps.
How people use it
The journeys it was designed around
A bookkeeperPost a reverse-charge GST voucher without a side spreadsheet
Opens RCM Voucher from the Accounting menu and picks the business partner and the notified goods/service category.
The GST split (CGST/SGST or IGST, depending on whether the partner is in-state) resolves from the company’s own configured tax accounts.
Posts the voucher — it lands in the books exactly like a receipt or payment voucher, so the Trial Balance and GST Export both pick it up without a manual adjustment.
A contracting businessBill a sub-contractor the way the sub-contractor actually invoices
Raises a Sub-Contractor Bill against a business partner flagged as a sub-contractor, using its own bill format rather than the generic purchase bill.
Line items carry the work done, retention and GST separately, so the bill matches what the sub-contractor’s own paper invoice shows.
Once posted, the payable lands against the same creditor accounts every other purchase-side voucher uses.
How it is built
Implementation and the rules real users find
Under the hood
Same checks, same posting logic, every voucher type — nothing breaks when a new one is added.
Voucher lists stay fast as history grows, with a fallback that never leaves a screen fully broken.
Every request is locked to the company and year you’re signed into.
Sub-contractor and construction bills are their own document type, built to match how those bills actually work.
Bank reconciliation shares the same chart of accounts as every voucher.
The rules real users find
Reverse-charge fields only appear when a partner is actually GST-flagged for them.
Numbering resets per company, per financial year — never carries over.
A cheque return reverses the original entry exactly, or the books stop reconciling.
Every list is scoped at the data level — no company’s data leaks into another’s view.
The screens
Taken from the live product
Click any shot to enlarge.
A sub-contractor bill, with retention and GST fields specific to contracting work.A construction purchase bill — its own schema, not the generic purchase bill screen.A transportation bill, for freight and logistics charges billed separately from the goods themselves.Receipt Voucher — the everyday entry every accounting system needs to get right first.Payment Voucher, posting against the same chart of accounts as every other voucher type.Journal Voucher, for the adjustments that don’t fit a receipt, payment or bill.
The rest of the platform
All 5 modules
These were built on one schema and one permission model, which is the only reason all 5 of them could ship together.
SigmaticAI is led by Ketan Khamgaonkar — an IIT Roorkee M.Tech who went on to PhD research at IIT Bombay before spending four years building AI automation, agentic systems and full web and mobile products. On every project you talk to the person writing the code.
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