The Impact of GST Reforms on India's Economic Growth: An Analysis of GDP Dynamics, Inflation Trends, and Fiscal Federalism (2017–2025)

Abstract The implementation of the Goods and Services Tax (GST) in July 2017 represents a major structural transformation in India’s indirect taxation system, replacing a complex multi-layered framework with a unified national tax structure. This study analyses the macroeconomic implications of GST with specific focus on gross domestic product (GDP) growth, inflation behaviour, and fiscal federal relations. The analysis is based on recent secondary data obtained from official sources including the Reserve Bank of India (RBI), Ministry of Statistics and Programme Implementation (MoSPI), and Ministry of Finance (MoF) covering the period up to FY 2024–25. The results show a positive long-term relationship between GST revenue mobilisation and economic growth, supported by a substantial increase in collections from ₹7.19 lakh crore in FY 2017–18 to ₹22.08 lakh crore in FY 2024–25. Although inflation experienced temporary upward pressure during the transition phase, subsequent policy adjustments contributed to greater price stability. From a federal perspective, GST has improved coordination between the Centre and states through institutional mechanisms such as the GST Council, while also raising concerns regarding fiscal autonomy at the state level. Sector-specific observations reveal efficiency gains in manufacturing and services, whereas small enterprises continue to face compliance-related challenges. The study suggests that strengthening digital infrastructure, simplifying procedures, and ensuring balanced revenue distribution will be essential for sustaining long-term economic growth in line with India’s development goals. Keywords: GST Reforms, GDP Growth, Inflation, Fiscal Federalism, Economic Integration, Viksit Bharat 1. Introduction 1.1 Need for the Study In order to avoid cascading effects and establish a smooth national market, India underwent the most comprehensive tax reform since independence with the adoption of the Goods and Services Tax (GST), which replaced 17 indirect levies. While the reform shows promise, its results are still evolving because of global uncertainties such as the COVID-19 pandemic and geopolitical issues.According to recent data, GST collections in FY 2024–2025 reached a record ₹22.08 lakh crore (9.4% YoY growth), indicating improved formalization and compliance. The most recent MoSPI and MoF reports, however, require revised empirical inspection because sectoral imbalances and federal revenue dynamics still exist. With a focus on post-2023 e-invoicing expansions and emerging 2025 rate rationalizations, this study fills in knowledge gaps about GST's involvement in GDP acceleration, inflation stability, and federal equilibrium. By integrating macroeconomic metrics with federalism perspectives, it contributes to policy discourse on inclusive, self-reliant growth under Viksit Bharat. 1.2 Objectives To examine the relationship between GST revenue and GDP growth (FY 2017–18 to 2024–25). To evaluate the influence of GST on inflation trends over time.. To analyse GST’s implications for fiscal federalism and intergovernmental relations. To identify sector-specific opportunities and constraints, particularly for MSMEs. 1.3 Hypothesis H1: GST revenue growth has a positive relationship with GDP growth. H2: GST initially increases inflation but contributes to stabilization over time. H3: GST promotes cooperative federalism but limits state fiscal autonomy. 1.4 Scope and Limitation The study excludes micro-level case studies and focuses on macro-level data through FY 2024–2025. Reliance on secondary data and the omission of current forecasts for 2025–2026 following the implementation of GST 2.0 are among the limitations. 2. Review of Literature Scholarly discussions on GST largely converge on its role in restructuring India’s indirect tax framework, with particular emphasis on efficiency gains and revenue expansion. A number of empirical studies indicate that improved compliance mechanisms and digital integration under GST have contributed to strengthening the tax base, which in turn supports broader economic performance. The interaction between GST and inflation has been examined with mixed conclusions. While certain studies identify a temporary increase in price levels immediately after implementation, others show that these effects tend to moderate over time as supply chains adjust and tax rates stabilize. This suggests that inflationary pressures associated with GST are largely transitional rather than persistent. Additionally, research highlights the contribution of GST toward reducing internal trade barriers and improving logistical efficiency, thereby supporting market integration. However, these advantages have not been experienced uniformly across all economic segments. Smaller firms, particularly MSMEs, often encounter operational challenges related to compliance requirements, technological adaptation, and working capital management. From the perspective of fiscal governance, GST has introduced a collaborative institutional structure through the GST Council, enabling joint decision-making between different tiers of government. At the same time, academic debates continue regarding the implications of this system for state-level fiscal independence, especially in regions with strong production bases. Concerns relating to compensation mechanisms and revenue distribution further underscore the need for continued policy refinement. Overall, the literature suggests that GST has generated notable structural benefits, but its long-term success depends on administrative efficiency, policy adaptability, and the ability to address sector-specific disparities. 3. Methodology This study adopts a descriptive-analytical approach using the latest secondary data from RBI, MoSPI, and GSTN portals (updated to June 2025 releases). Time-series data spans FY 2017–18 to 2024–25. 3.1 Data Sources and Variables Independent Variable: GST Revenue (₹ lakh crore) Dependent Variables: GDP Growth( %) and Inflation (%). Control for Federalism: Compensation Cess (₹ trillion), SGST Share (% of total GST). Data compilation used official releases; minor approximations were resolved with revised figures (e.g., 2023–24 GST at ₹20.18 lakh crore). 3.2 Analytical Tools Trend and descriptive analysis Correlation and simple linear regression using Microsoft Excel Qualitative assessment of federal and sectoral aspects 4. Data Analysis and Findings 4.1 GST Revenue Trends Due to e-invoicing, digital compliance, and economic recovery, GST collections have expanded more than tripling from ₹7.19 lakh crore in FY 2017–18 to ₹22.08 lakh crore in FY 2024–25 (Table 1). The formalization of the informal sector and increased taxation base (from ~60 lakh to 1.51 crore) are highlighted by the CAGR of almost 17.2%. The effectiveness of GST in expanding the tax base and promoting supply-chain integration is demonstrated by this increase. Table 1: Annual GST Collections (₹ Lakh Crore) FY Gross GST YoY Growth (%) 2017–18 7.19 - 2018–19 11.77 63.7 2019–20 12.22 3.9 2020–21 11.36 -7.0 2021–22 14.76 29.9 2022–23 18.08 22.6 2023–24 20.18 11.6 2024–25 22.08 9.4 Source: GSTN, MoF/PIB (2025) 4.2 Impact on GDP Growth According to the most recent MoSPI estimates, India's average annual GDP growth after the GST was 5.53%, recovering from a -5.78% decline in FY 2020–21 followed by a strong recovery. H1 is supported by correlation analysis, which shows r = 0.370 (p = 0.366), a somewhat stronger positive link than previous estimates. The slope of the linear regression is approximately 0.32–0.35, indicating that every ₹1 lakh crore rise in GST is associated with a 0.32–0.35% increase in GDP (R² = 0.14). The non-significance in small samples can be explained by external shocks (COVID-19, global disruptions), while long-run ARDL models from the literature confirm causality. On the mechanisms, the Goods and Services Tax (GST) increased GDP contributions from manufacturing and services by 1% to 2%, abolished cascading taxes, and decreased logistics costs by more than 30% (NITI Aayog, 2024). Opportunities include formalization and supply-chain efficiency, which will especially help export-oriented industries. Table 2: GDP Growth and GST Revenue FY GST (₹ Lakh Cr) GDP Growth (%) 2017–18 7.19 6.80 2018–19 11.77 6.48 2019–20 12.22 3.74 2020–21 11.36 -5.78 2021–22 14.76 9.69 2022–23 18.08 7.6 2023–24 20.18 9.2 2024–25 22.08 6.5 Source: RBI and MoSPI revised estimates (2025) Hypothesis H1 Testing Result: Moderately supported (stronger directional positive correlation; p > 0.05 due to sample size and shocks, but reinforced by updated data and literature). 4.3 Impact on Inflation With a limited association with GST revenue (r = 0.273), inflation increased from 3.33% in FY 2017–18 to a peak of 6.70% in FY 2022–2023, supporting H2's theory of initial aggravation brought on by transitory input cost pass-through, rate adjustments, and supply disruptions. But later structural changes, such as the zero-rating of necessities, slab rationalizations in 2023–2024, extensive e-invoicing, and enhanced supply-chain efficiencies, reduced inflation to 4.0% in FY 2024–2025. According to long-term evaluations (such as the ARDL models mentioned in the literature), as formalization and competition rise over time, the negative inflationary effect of GST becomes negligible or even somewhat deflationary. Initially difficulties were most noticeable in rural and semi-urban areas, where about 40% of small dealers and workers in the informal sector were impacted by the delayed pass-through of input tax credits. However, changes made after 2023 improved overall supply responsiveness and dec