Practical GST and accounting calculators for Indian businesses.
Use Lejur One free tools for focused monthly workpapers, calculations, and review support. The tools are designed for owners, accountants, and CA teams who want browser-based utilities before moving the full workflow into Lejur Books.
GSTR-3B Calculator
Prepare GSTR-3B working figures for ITC reversal, manual/RCM adjustments, and tax liability.
Open toolGST Return Consolidator
Consolidate multiple GSTR-1 and GSTR-3B portal files (Excel, JSON, PDF) monthly and export reports.
Open toolTDS & GST Interest Calculator
Calculate late payment interest for TDS/TCS u/s 201(1A) and GST u/s 50 (18% and 24% p.a.) in quick or bulk modes.
Open toolMore free tools are coming.
Future tools can cover GST working papers, ledger checks, import validators, payroll calculators, and practical compliance summaries.
Private by design
The current calculator runs inside your browser. It is intended for working papers and review support, not for storing financial records or replacing professional verification before filing.
Built around real monthly work
The GSTR-3B calculator focuses on proportionate ITC reversal, manual and RCM adjustments, taxable versus exempt sales ratio, and final tax liability workings.
Common questions about our free tools.
Are these free GST tools secure?
Yes. All calculation, file processing, and merging happen locally in your web browser. No files or financial numbers are uploaded to Lejur One servers.
What formats do the calculators accept?
You can upload Excel (.xlsx, .xls), CSV, JSON, and PDF files directly exported from the GST portal.
Can I use the output for filing?
The output is meant to serve as working papers. Always verify your final values with your books, portal data, and professional advice before filing returns.
How do I move from worksheets to automated returns?
For automated reconciliations, direct voucher postings, detailed audit trails, and multi-tenant reporting, check out Lejur Books.
Want controlled posting, reports, GST data, approvals, and mobile review in one system?
Lejur Books connects vouchers, GST reports, ledgers, inventory, approvals, audit trails, and AI-assisted review in the live app.