The direction here isn’t subtle. Every step down has pulled a wider band of ordinary mid-size businesses into scope, and CBIC’s own commentary has signaled the trend is toward covering more registered businesses over time, not fewer. If your business has been comfortably below past thresholds, that’s exactly the kind of assumption worth re-checking today rather than next year.

Once You Cross INR 5 Crore, You’re In Permanently

This is the detail that catches businesses off guard most often: the INR 5 crore check isn’t based on your current year’s turnover alone. If your aggregate turnover crossed INR 5 crore in any financial year since 2017-18, even a single year, even years ago, the e-invoicing obligation applies from the relevant notified date onward, and it doesn’t switch off if turnover later drops back below INR 5 crore.

In practice, this means a business that had one unusually large year a while back, followed by several quieter years since, can still be squarely in scope today. Checking only this year’s numbers and concluding you’re exempt is one of the more common and more costly mistakes we see.

The Extra Rule Above ₹10 Crore: The 30-Day IRN Window

Businesses with aggregate turnover of INR 10 crore or more face a tighter compliance layer on top of the base e-invoicing requirement. Since April 2025, invoices, credit notes, and debit notes older than 30 days from their invoice date can no longer be reported to the IRP for IRN generation at all, not delayed, simply blocked.

This is a genuinely easy rule to miss if invoice reporting isn’t built into a business’s regular monthly rhythm, since the consequence isn’t a penalty notice, it’s the invoice quietly becoming unable to be validated at all once the window closes.

Who’s Exempt, Regardless of Turnover

A handful of categories remain outside e-invoicing requirements even above INR 5 crore turnover:

• Special Economic Zone (SEZ) units
• Government Departments & Local Authorities
• Insurance and banking companies
• Goods Transport Agencies (GTAs)
• Passenger transportation services
• Cinema ticket sellers

Worth flagging: SEZ units are exempt, but SEZ developers are not, a distinction that trips up businesses operating within SEZ structures more often than it should.

How to Check If Your Business Is Actually in Scope

A proper check means looking at aggregate turnover across every GSTIN registered under your PAN, across every financial year since 2017-18, not just the most recent one. In practice:

• Pull turnover figures for each financial year from 2017-18, combined across all your GSTINs
• Check whether any single year crossed INR 5 crore, even if current turnover is lower
• If you’re already above INR 10 crore, separately confirm your invoice reporting workflow respects the 30-day IRN window
• Get this confirmed in writing as part of your GST advisory relationship, not assumed internally since tax notices on this point often surface well over a year after the fact, and a documented review is your clearest defence at that stage

Building this check into your regular filing rhythm is easier alongside our Compliance Calendar, which tracks this alongside your other statutory deadlines rather than as a separate, easy-to-forget task.

What Happens If You Don’t Comply

An invoice issued without a valid IRN when one was required isn’t a minor paperwork gap, it’s treated as not having been issued at all under GST law. That has two consequences that compound quickly: your own return reporting on the GSTN portal can be flagged as inconsistent, and your buyer loses the ability to claim input tax credit on that invoice. In practice, it’s often the buyer who notices first and escalates the issue back to you, since the missing ITC hits their numbers directly and if that escalation turns into an actual notice, our guide on how to respond to a GST notice in India walks through the reply format and timelines.

Where This Is Headed

Based on the pattern of the last five years, it would be reasonable to expect the threshold to be reviewed again rather than left permanently at INR 5 crore but no specific future figure has been officially announced, and speculating on one wouldn’t be useful. What’s more actionable right now is treating the current INR 5 crore line as a moving target worth re-checking periodically, rather than a one-time box to tick.

Key Takeaways

• The current GST e-invoicing threshold is INR 5 crore aggregate turnover, in force since August 2023
• Once crossed in any year since 2017-18, the obligation applies permanently, regardless of later turnover
• Businesses above INR 10 crore face an additional 30-day IRN reporting window
• Certain categories (SEZ units, insurance, banking, GTAs, passenger transport, cinema) remain exempt
• An invoice without a valid IRN is treated as not issued at all, which blocks your buyer’s input tax credit

If you haven’t checked your aggregate turnover history against this threshold recently or if you’re already above INR 5 crore and want a second opinion on whether your invoicing workflow is fully compliant, that’s exactly the kind of review worth having before a mismatch surfaces on its own. Our GST Advisory Services in India cover exactly this kind of compliance check, alongside ongoing return filing and reconciliation support.