GSTR-1 vs E-Invoice Reconciliation
Match your GSTR-1 outward supply data against e-invoice records
Upload GSTR-1 JSON and your e-invoice register (Excel). The tool matches invoices two-stage, flags any missing or value-mismatched invoices, and outputs a color-coded reconciliation report.
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What is a GSTR-1 vs E-Invoice Reconciliation?
Since October 2020, businesses above the notified turnover threshold (currently ₹5 crore) must generate e-invoices through the Invoice Registration Portal (IRP). The IRP-validated invoices must then be reported in GSTR-1. Any invoice generated via IRP but missing from GSTR-1 — or with different values — creates a compliance gap that GSTN can detect.
This tool reconciles your GSTR-1 outward supply data against your e-invoice register (IRN report from IRP). It uses two-stage matching: exact on GSTIN + invoice number, then fuzzy for the same-GSTIN pairs where invoice numbers differ slightly due to ERP formatting. Value mismatches (delta) are shown per invoice across all tax components.
The most common issues this catches: (1) e-invoices generated in IRP but not pushed to GSTR-1 by the ERP, (2) value amendments in GSTR-1 that don't match the IRN-validated amount, (3) cancelled IRN invoices still appearing in GSTR-1.
Why use this GSTR-1 vs E-Invoice Reconciliation
Built for Indians, by Indians. Every number, every formula, every slab — tuned to FY 2026-27 reality.
Two-stage matching
Exact match on GSTIN + invoice number, then fuzzy match for same-GSTIN invoice number differences ≤ 2 chars or shared prefix.
Color-coded status
Matched clean (green), delta mismatch (amber), probable match (orange), in GSTR-1 only (red), in e-invoice only (blue).
Tax delta columns
Δ invoice value, Δ taxable, Δ IGST, Δ CGST, Δ SGST for every matched pair — spot value differences instantly.
Private
All processing in your browser. No server, no upload, no account.
Using the GSTR-1 vs E-Invoice Reconciliation in 4 steps
No onboarding, no signup. Answer three fields and the numbers update live.
Upload GSTR-1 (source)
Download GSTR-1 JSON from the GST portal or your ERP. Drag to the left drop zone.
Upload e-invoice register (target)
Export your IRN/e-invoice register from IRP or your ERP as .xlsx. Columns should include GSTIN, invoice number, date, and tax values.
Run reconciliation
Click "Run reconciliation". Matches are computed in two stages and results are color-coded.
Review and fix gaps
Blue rows (e-invoice only) indicate IRN invoices missing from GSTR-1 — these must be added. Red rows (GSTR-1 only) indicate invoices without IRN — check if e-invoice was mandatory.
Tips to get the most out of it
Run this reconciliation before finalising GSTR-1 each period. E-invoice-GSTR-1 mismatches are now a standard GSTN scrutiny item.
Blue rows (e-invoice only) are the highest priority — these are invoices with a valid IRN that haven't been declared in GSTR-1. Add them before filing.
For cancelled IRNs (cancelled in IRP), verify they are also absent from GSTR-1 or appear as credit notes. Cancelled invoices showing as active in GSTR-1 will trigger IRP-GSTN mismatch notices.
Delta mismatches in invoice value often arise when the IRP captures the GST-inclusive amount and the ERP captures the exclusive amount. Establish a consistent convention across systems.
For inter-state B2B invoices above ₹2.5 lakh, e-invoice is mandatory regardless of turnover threshold for some categories. Ensure your e-invoice register covers all such invoices.
Real-world scenarios
How Indians actually use this tool — concrete inputs, concrete outcomes.
Pre-GSTR-1 filing check
Finance team runs GSTR-1 vs e-invoice recon two days before the filing deadline. Finds 5 blue rows — IRN invoices missing from GSTR-1 draft. Adds them before final upload, avoiding a mismatch notice.
Amendment detection
CA finds 3 amber rows (value delta). Traces to invoices where the base amount was corrected in GSTR-1 after IRN generation. Issues GSTR-1 amendments and notes the delta for audit trail.
Cancelled invoice audit
Compliance team filters for red rows (GSTR-1 only) and cross-checks against IRP portal. Confirms these are invoices for exempt supplies not requiring e-invoice. Documents the exemption basis.
Frequently Asked Questions
Still have a question? Our team replies within a business day.
Any GST-registered business above the current e-invoice threshold (₹5 crore aggregate annual turnover as of 2024). Below this threshold, e-invoice is not mandatory and this reconciliation is optional.
Export from IRP or your ERP as .xlsx. Include columns for supplier GSTIN (or buyer GSTIN for recipient-side), invoice number, invoice date, and tax amounts (IGST/CGST/SGST). Column names are matched flexibly.
GSTN compares GSTR-1 against IRN data automatically. Mismatches above a threshold trigger scrutiny notices under Rule 88C. The delta columns in this tool help you identify and resolve mismatches before filing.
If you include cancelled IRNs in your e-invoice register upload, they will appear as target-only (blue) if not in GSTR-1 — which is the correct state. Filter cancelled IRNs out of your register before reconciling for a cleaner view.
No. This is a local converter/reconciliation tool. You must export your e-invoice register from IRP or your ERP and upload it here manually.
Yes. All processing is in-browser JavaScript. No data is sent to any server. Close the tab and it's gone.
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