Passenger vehicles grew 21.4% after the GST cut, but Bajaj's two-wheeler sales fell 12% and M&M's tractor sales dropped 21% in the same month. A good lesson in why "lower tax = sector benefits" is too simple
Was reading about how GST 2.0 reforms are actually playing out a year later and the sector-level divergence is the most interesting part, more than the rate cuts themselves.
Quick background: September 2025 collapsed India's GST slabs from 4 rates (5/12/18/28%) down to mainly 5% and 18%, with a special 40% rate for a few categories. Small cars and bikes up to 350cc went from 28% to 18%, cement 28% to 18%, most medicines 12% to 5%, individual life/health insurance went to fully exempt.
A year on, here's where it's actually landing:
Autos are the clearest case of "same sector, opposite outcomes." Passenger vehicles grew 21.4% YoY in September 2026. But Bajaj Auto's domestic two-wheeler sales fell 12% and Mahindra's tractor sales fell 21% in that same month, even though tractors got one of the biggest cuts (12% to 5%). Same tax reform, same month, completely different demand outcomes depending on the sub-segment.
Insurance has a genuinely counterintuitive twist. Individual life and health premiums became GST-exempt, which sounds purely good for insurers. But exempt supplies usually mean insurers have to reverse input tax credits on their own costs, so part of what looks like a consumer win can quietly raise the insurer's own expenses. Whether shareholders benefit depends on whether higher policy volumes outweigh that cost increase, not just the headline exemption.
FMCG and consumer durables both come with the same warning: watch volume growth, not revenue growth. If lower prices with rising input costs, companies can sell more units and still not see margins improve proportionately.
The macro backdrop makes this trickier to read too. Nifty fell 6.1% in September 2026 even as this reform was playing out, driven by global rate concerns, crude prices and FII outflows, not fundamentals. GST collections were up 14.7% YoY to ~₹2.04 lakh crore, which says something about overall taxable activity but doesn't by itself prove the rate cuts created the demand.
There's also a second, quieter phase apparently coming on Oct 8, focused less on rate cuts and more on faster refunds and easier compliance, which sounds boring compared to rate changes but can matter more for capital-intensive manufacturers and exporters stuck with blocked input tax credit.
The framework I took away: a sector getting a tax cut tells you about potential demand, not about which specific company converts that into earnings. Pretty much every sub-segment here had at least one name growing and one name shrinking in the same reform window.
Curious if people here track second-order policy effects like refund/compliance reform, or mostly just react to the headline rate-cut news and move on.