India’s long-running effort to simplify and rationalise the Goods and Services Tax (GST) structure is starting to show tangible macroeconomic dividends. According to a recent report by SBI Research, GST rate rationalisation has already reduced Consumer Price Index (CPI) inflation by around 25 basis points during the September–November 2025 period, with the full impact likely to reach 35 basis points in FY26.

The finding is significant because it reframes GST reform not merely as a compliance or revenue exercise, but as an active contributor to price stability. For policymakers grappling with volatile global conditions, this offers a rare example of a structural reform delivering near-term macro benefits.

India’s CPI inflation has seen sharp swings over the past two years, driven by food prices, precious metals, energy costs, and currency movements. While monetary policy has shouldered most of the burden of inflation control, fiscal-side interventions such as GST rationalisation have remained harder to quantify in real-time data.

Earlier, SBI Research had estimated that GST changes could potentially shave off as much as 85 basis points from CPI inflation. However, with more granular item-level data now available, the actual measured impact appears more modest but still meaningful.

As per the report, “item-by-item calculation now shows that the decline in CPI inflation due to GST has been around 25 basis points so far in the Sep–Nov’25 period.” This recalibration underscores the complexity of tracing indirect tax changes through retail prices, especially in an economy with varied consumption patterns and regional disparities.

What is changing

SBI Research now believes that the full inflation impact of GST rationalisation is yet to be captured. One key reason is the exclusion of e-commerce discounting effects from headline CPI calculations. The report notes that lower GST rates may have amplified online discounts, indirectly reducing consumer prices beyond what is visible in official data.

Factoring in these dynamics, SBI estimates that the total reduction in CPI inflation owing to GST could reach around 35 basis points in FY26. This would make GST rationalisation one of the more effective non-monetary disinflation tools deployed in recent years.

At the same time, the broader inflation picture remains mixed. India’s CPI inflation trend reversed slightly in November 2025, rising to 0.71 per cent from 0.25 per cent in October. SBI expects CPI inflation to reach 2.7 per cent by March 2026, reflecting seasonal and external pressures.

Why it matters

The timing of this disinflationary impulse is crucial. SBI Research flags that inflationary risks are re-emerging due to rupee depreciation, which raises the landed cost of imports and feeds into fuel, fertiliser, and manufacturing input prices.

State-level data already highlight these pressures. Kerala, for instance, recorded inflation of 8.27 per cent in November 2025, driven largely by sharp increases in gold, silver, and oil and fats—categories with high consumption intensity in the state.

Against this backdrop, GST-led price moderation provides a counterbalance, helping anchor inflation expectations without requiring immediate monetary tightening.

Official views or policy signals

Despite the positive GST impact, SBI Research does not expect any near-term shift in the Reserve Bank of India’s policy stance. The report forecasts average inflation at 1.8 per cent in FY26 and 3.4 per cent in FY27, levels that remain broadly manageable within the RBI’s tolerance band.

Crucially, SBI does not anticipate any change in policy rates at least until the February monetary policy review, suggesting that the central bank may choose to “look through” near-term inflation fluctuations while monitoring currency and commodity trends.

Potential business and market implications

For Indian markets, sustained GST-driven disinflation could improve real consumption growth, especially in price-sensitive categories such as FMCG, discretionary retail, and e-commerce. Lower indirect tax incidence can also improve demand elasticity without squeezing corporate margins.

From a fiscal perspective, the findings strengthen the case for continued GST rationalisation, provided revenue buoyancy remains intact. If inflation control can be achieved without additional rate hikes, it reduces the risk of growth-inhibiting policy trade-offs.

Bull vs Bear view

From a bullish standpoint, GST rationalisation acting as a structural disinflation force could support lower-for-longer interest rates, aiding equities and consumption-led growth. It also enhances policy credibility by showing measurable reform outcomes.

On the bearish side, the inflation relief may be overwhelmed if rupee depreciation accelerates or global commodity prices spike. In such a scenario, GST-driven gains could prove insufficient to prevent a broader inflation rebound.

Key risks to watch

The primary risk lies in external shocks—currency volatility, energy prices, and imported inflation. Additionally, uneven state-level inflation trends suggest that GST benefits may not be uniformly distributed across regions or consumption baskets.

For now, SBI Research’s assessment positions GST reform as a meaningful, if understated, stabilising force in India’s inflation trajectory.