Here's the thesis worth testing rather than assuming: when the GST Council cuts a rate from 28% to 18%, or from 18% to 5%, the mechanical arithmetic says prices should fall by a predictable, calculable amount. Nine months into GST 2.0, the actual Consumer Price Index data shows something far messier. Some sectors delivered close to the full mathematical benefit. Others delivered a fraction of it. A few sectors saw prices rise despite a tax cut large enough to have mechanically pushed them down by double digits. The gap between those two outcomes isn't random, it's explained almost entirely by input tax credit structure and margin behaviour, and understanding that gap tells you more about how GST actually works than the headline rate cuts do.
Why Rate Cuts Don't Uniformly Become Price Cuts
A GST rate cut only becomes a price cut if three conditions hold: the manufacturer's input costs stay flat, the manufacturer's input tax credit position is unaffected by the output rate change, and the manufacturer chooses not to use the freed-up margin for anything else. In practice, none of these conditions held uniformly across sectors between September 2025 and March 2026. Where a sector's inputs were also taxed at a similar or higher rate, the output rate cut mechanically improved margins without changing much for consumers unless competitive pressure forced a pass-through. Where a product moved to fully exempt status, manufacturers lost the ability to claim input tax credit on the inputs used to make it, a real cost that partially cancels out the visible tax saving. And where commodity costs or the rupee moved against manufacturers during the same window, GST 2.0's headroom got quietly absorbed into margin protection rather than passed to the till.
Sector-Wise Rate Changes: Expected Impact vs What Actually Happened
| Sector | Old GST Rate | New GST Rate | Expected Price Impact* | Actual Observed Impact** |
|---|---|---|---|---|
| Passenger cars (small/mid segment) | 28% | 18% | ~-7.8% | -7.5% (near-full pass-through) |
| Two-wheelers (under 350cc) | 28% | 18% | ~-7.8% | -5.3% (partial) |
| Furniture, furnishings, carpets | 28% | 18% | ~-7.8% | +1.0% (fully reversed) |
| Footwear (mid-value segment) | 12% | 5% | ~-6.3% | -1.4% (muted) |
| Garments (mid-value segment) | 12% | 5% | ~-6.3% | +1.4% (fully reversed) |
| Personal care (hair oil) | 18% | 5% | ~-11.0% | +2.5% (starkest reversal) |
| Personal care (shampoo) | 18% | 5% | ~-11.0% | +0.5% (reversed) |
| Ice cream | 18% | 5% | ~-11.0% | -1.2% (muted) |
| Dairy (butter) | 12% | 5% | ~-6.3% | +0.6% (fully reversed) |
*Expected impact calculated as -(new rate − old rate) ÷ (100 + old rate) × 100, assuming full pass-through with no change in input costs, i.e. the textbook case. **Actual observed impact per a Bank of Baroda research note comparing CPI sub-indices between August 2025 (pre-reform base month) and March 2026 (seven months post-reform), as reported by trade publications. Treat the "actual" column as a single research house's estimate, not an official CBIC figure, and verify against the primary report before citing precisely.
Visualizing the Rate Cuts: Old vs New GST Rate by Sector
Old vs new GST rate by sector under GST 2.0 (effective 22 September 2025). Data: GST Council notifications.
The Sharper Story: Price Trends Before and After the Rate Change
The bar chart above shows what the Council changed. It doesn't show what happened next. That's where the line chart earns its place, because three sectors that all received meaningful rate cuts went on to follow three completely different price trajectories over the following seven months.
Indexed price trend, August 2025 = 100. Illustrative series constructed from Bank of Baroda's Aug'25-Mar'26 CPI comparison endpoints; monthly path between endpoints is a reasonable interpolation, not month-by-month official data.
Three distinct shapes emerge. Automobile prices dropped sharply right after the reform and stayed down, a durable, one-way pass-through. Personal care prices actually dipped briefly in the first weeks (companies were visibly cautious during the anti-profiteering scrutiny window around the festive season), then climbed steadily past the pre-reform baseline by March, a full round trip. Processed foods and dairy sat in between, a modest initial benefit that faded almost to nothing within two quarters.
A Worked Example: What Actually Happens Inside a Manufacturer's P&L
Take packaged paneer, a real and well-documented case. Mother Dairy's 200-gram paneer pack fell from ₹95 to ₹92 when GST 2.0 took effect, a 3.2% cut, once paneer moved to fully exempt status. On the surface, moving a product to 0% tax should deliver a bigger cut than that. Here's the mechanism that explains the shortfall.
Old regime: Production cost ₹80, GST on output at 5% = ₹4, selling price ₹84. Input tax credit of roughly ₹4 on packaging, logistics, and processing inputs is fully claimable against this output liability, so the manufacturer's real net cost stays at ₹80.
New regime (output now exempt): No output GST is charged, but because the output is exempt, the ₹4 of input tax credit on the same packaging and logistics inputs can no longer be claimed. That ₹4 becomes a stranded cost baked directly into production. Real cost rises from ₹80 to ₹84.
If the manufacturer passes this through fully: new selling price = ₹84, identical to the old tax-inclusive price. The "0% GST" delivers a real-world price cut of roughly zero, even though the tax rate on paper fell from 5% to nil.
Mother Dairy's actual 3.2% cut sits between this worst-case zero-benefit scenario and the naive "5% GST removed equals a 4.8% price cut" calculation a consumer might expect, which is exactly what you'd predict if the company absorbed part of the stranded input tax cost rather than all of it. This single mechanism, denial of input tax credit on exempt supplies, is arguably the most underappreciated reason GST 2.0's headline cuts didn't translate one-for-one into retail price cuts across several food and personal care categories.
Why Prices Didn't Fall as Expected: Three Mechanisms, Not One
The popular narrative treats "GST cut, prices didn't fall much" as evidence of corporate profiteering, full stop. The data supports a more layered explanation.
1. Input Tax Credit Structure Cuts Both Ways
As the paneer example shows, moving a product to exempt status can strand previously-claimable input credit, quietly offsetting part of the visible tax cut. Conversely, when a product's rate falls but its inputs remain taxed at a higher rate (an inverted duty structure), the manufacturer may end up sitting on excess, slow-to-refund credit, which improves their reported margin on paper without necessarily translating into an immediate cash benefit they're eager to hand to consumers.
2. Margin Protection Against Rising Input Costs
Hair oil, shampoo, and personal care broadly saw some of the sharpest rate cuts in GST 2.0, an 11-percentage-point mechanical benefit, and some of the worst consumer outcomes, prices actually higher than before the reform. A Systematix Group report covering the December 2025 quarter found FMCG companies posted 9% year-on-year revenue growth with volumes up 6%, aided by GST-linked reductions in categories like biscuits and noodles, but with margin expansion constrained. By February 2026, trade reporting described FMCG makers raising prices by up to 5% on items including detergents, hair oils, and chocolates, citing higher commodity costs and a weaker rupee, precisely the categories most exposed to imported fragrance compounds, specialty chemicals, and palm-oil-linked inputs.
3. The Anti-Profiteering Enforcement Cycle
This is the least discussed mechanism and arguably the most important. Trade reporting explicitly describes FMCG companies acting "cautiously to avoid scrutiny under anti-profiteering regulations" in the first weeks after the reform, when government attention, media coverage, and mandated newspaper price advertisements were all at their peak. Hindustan Unilever's newspaper-advertised cut on a 340ml Dove shampoo bottle, from ₹490 to ₹435 (an 11.2% reduction, almost exactly matching the mechanical GST math), is a textbook example of a highly visible, scrutiny-driven full pass-through. But Bank of Baroda's CPI comparison, run six to seven months later, found shampoo prices had actually risen 0.5% above the pre-reform baseline. Once the festive-season spotlight and anti-profiteering scrutiny faded, companies regained normal pricing power and used it, a pattern several distributors described to trade media as firms "exercising pricing power once again."
What to Watch Next
First, watch whether the National Anti-Profiteering Authority framework or its successor mechanism under the GST Appellate Tribunal issues any fresh orders specifically targeting FMCG categories where CPI data shows a full reversal, hair oil and shampoo being the clearest candidates. A wave of scrutiny here within the next two to three quarters would confirm regulators are reading the same CPI divergence this piece does; continued silence would suggest enforcement bandwidth, not evidence, is the binding constraint.
Second, watch the automobile sector's price durability through the next festive cycle. If small-car and two-wheeler prices stay near their post-reform lows through Q3 FY27 without a quiet creep back upward, that would confirm the auto sector's near-full pass-through was structural (driven by intense competition and price transparency) rather than a temporary compliance-driven effect like personal care experienced.
Third, watch whether the GST Council addresses the exempt-supply input tax credit denial problem directly, perhaps by allowing a partial notional credit for specific exempt food categories. Industry bodies have raised inverted-duty and stranded-credit issues at past Council meetings, and a policy fix here would be a clear, falsifiable signal that the government has identified the same ITC-driven shortfall documented in this piece.
Frequently Asked Questions
Why didn't shampoo and hair oil prices fall even though GST dropped from 18% to 5%?
CPI data shows these categories actually rose after an initial dip, largely because manufacturers used the rate-cut headroom to absorb rising input costs (imported fragrance compounds, palm-oil-linked ingredients, a weaker rupee) rather than passing the full tax benefit through, once the initial anti-profiteering scrutiny window passed.
Which sectors saw the most durable GST 2.0 price benefits?
Automobiles, particularly small cars and two-wheelers under 350cc, showed the closest match between the mechanical rate-cut math and the actual observed price decline, and that benefit held up over the following seven months rather than fading.
Does moving a product to 0% GST always mean a bigger price cut than a partial rate cut?
Not necessarily. When a product becomes fully exempt, the manufacturer loses the ability to claim input tax credit on the inputs used to make it, which can strand a real cost that partially offsets the visible tax removal, sometimes resulting in a smaller net price reduction than a partial rate cut on a still-taxable product.
Is the government monitoring whether companies are actually passing on GST 2.0 benefits?
Yes, in principle, through India's anti-profiteering framework, though enforcement intensity appears to have been strongest in the weeks immediately following the reform's rollout and less visible in subsequent months, based on the price-reversal pattern seen in several FMCG categories.
Rate change data in this article is drawn from GST Council press releases and CBIC notifications effective 22 September 2025. Sector-wise "actual observed impact" figures are drawn from a Bank of Baroda research note comparing CPI sub-indices between August 2025 and March 2026, as reported by The Hindu BusinessLine and trade publications; treat these as a single research house's estimates rather than official CBIC figures. Company-specific price changes (Mother Dairy, Hindustan Unilever) are drawn from company announcements as reported by Business Standard. The line chart's month-by-month path is a reasonable interpolation between documented endpoints, not official monthly CPI data, and the manufacturer cost illustration is a hypothetical constructed to explain the mechanism, not an actual company's financials. For official notifications, refer to the GST Council and CBIC. For related analysis, see our pieces on state-wise GST collection divergence, effective versus statutory corporate tax rates, and India's tax expenditure statement. This article is for general policy analysis and is not investment or business advice.