Opinion | Urban Quest I: The Pathway For Chennai To Become A Developed City By 2047

For Chennai to sustain 10 per cent GDP growth over the next 22 years and become a $1 trillion economy, the city needs to increase its annual capex-to-GDP ratio to 12-15 per cent

India stands at a pivotal moment in its urbanisation journey. The evidence shows that the country is far more urban in economic, functional, and spatial terms than the conventional definitions and boundaries of urbanisation suggest.

Moreover, urbanisation has concentrated productivity, innovation, and labour markets in our cities. Nonetheless, as the Economic Survey 2025-26 suggests, “our cities have not been equipped with the institutional, fiscal, and planning foundations commensurate with their role in national prosperity."

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This, along with the myriad problems facing cities, prevents them from fulfilling their defined role in making Bharat Viksit by 2047.

Crux of Urban Quest Series

In the context of the Urban Quest series, I examine one city at a time, assess its readiness to support the country’s growth towards Viksit Bharat by 2047, analyse the challenges facing it, and outline the path for it to fulfil its mandated role.

In the first two editions of the ‘Urban Quest’ series, I delved deeper into Ahmedabad and Bengaluru. In the current third edition, I do a two-part deep dive in Chennai, colloquially known as the “Detroit of India." The analysis focuses on as-is, where-is analyses and the opportunities before the city, and discusses the challenges Chennai faces in actualising its potential and possible solutions.

I begin where it began.

Chennai (formerly Madras) has evolved from an ancient settlement to a major modern metropolis. Its history includes prehistoric origins, medieval kingdoms, colonial expansion, and post-independence growth as “Gateway to the South."

But the journey of modern Madras commenced in 1639 when Francis Day, an agent of the British East India Company, secured land from the Nayaks (of the Vijayanagar empire) and established the St. George Fort in 1644.

Madraspatnam became the capital of the Madras Presidency by 1652, with the city divided into two parts-

“White Town" (the European fort area) and “Black Town" (the Indian quarters).

The 19th-century Madras was characterised by:

The arrival of railways (1856),

The establishment of Madras University (1857), and

The creation of the Madras High Court (1862).

These solidified Madras’s role as the administrative centre of South India under British rule. The name Madras was changed to Chennai on July 17, 1996, by the Tamil Nadu state government as part of a broader effort to replace colonial-era names with their native, indigenous counterparts.

Since the first official census of the country in 1871, the population of Madras (now Chennai) has grown as follows:

At the time of the first post-independence census in 1951, Madras became a million-plus city. And by the 2011 census of India, the Chennai core city population (within the then-municipal corporation limits) was 4.65 million.

However, Chennai grew rapidly beyond its core city area and, according to the 2011 census, the population of the Chennai Metropolitan Area (CMA) was 8.65 million, up from 6.56 million in 2001. In 2026, according to UN World Population Review, the Chennai metropolitan area population is projected to be 12.62 million and is expected to grow beyond 15 million by 2031 and 20 million by 2047.

The Chennai Metropolitan Area (CMA) at 12.62 million is now the fifth most populous metropolis in India, next only to

Delhi (35.5 million),

Greater Mumbai (22.5 million),

Kolkata UA (16.2 million) and

Bengaluru (14.77 million).

In terms of geographical spread, the Chennai Metropolitan Area (CMA), in 2026, covers 5,904 sq. km (a massive five-fold increase from the previous 1,189 sq. km till October 2022), and is the sixth largest after

Delhi NCR (55,083 sq. km),

Mumbai (6,328 sq. km),

Bengaluru (8,005 sq. km),

Hyderabad (7,257 sq. km) and

Chennai’s CMA also has one of the highest population densities among Indian metropolises.

The Demographic Shift

Based on the 2011 Census and projections for 2026, Chennai has transitioned from a densely populated, rapidly growing city to a more mature, sprawling metropolitan area with a high literacy rate and a significantly ageing population.

According to the 2011 census, the elderly population of Chennai, at 10.5 per cent, was notably higher than the national average (9 per cent) and the elderly populations of peer cities such as:

Mumbai (9.8 per cent),

Bengaluru (9.2 per cent), and

Delhi (7.5 per cent).

In 2026, the elderly population in Chennai is expected to be 13-14 per cent, due to improvements in life expectancy beyond 74 years.

And the trend is unmistakable – Chennai is already the elderly capital of India, and by 2032, the elderly population shall further increase sharply to 17%, driven by Tamil Nadu’s TFR below 1.7 and life expectancy nearing 76 years. The working-age (15-59) share of Chennai is expected to peak at 65 per cent before a slight decline post-2031, while the child share (0-14) falls to 6-7%.

Clearly, as Northern and Eastern States of India prepare to reap the unprecedented demographic dividend, Chennai must plan special measures to address its rapidly increasing elderly population.

Regarding the state’s economic strength, figures vary by source, but all data converge on Tamil Nadu’s Gross State Domestic Product (GSDP), ranking second among Indian states, only behind Maharashtra. It has consistently outperformed states like Gujarat, Uttar Pradesh, and Karnataka in recent nominal GSDP growth.

Tamil Nadu occupies roughly 4 per cent of India’s land area and accounts for about 6 per cent of its population, yet, as an industrial powerhouse, it contributed 9.21 per cent to national GDP (2023–24), with a major focus on manufacturing, electronics, and exports.

Between 2011-12 and 2024-25, Tamil Nadu’s nominal GSDP grew at a compound annual growth rate (CAGR) of approximately 10.4 per cent, reaching around Rs. 31.19 lakh crore from Rs 8.65 lakh crore.​

In dollar terms, Tamil Nadu GSDP in 2024-2025 is approximately $373 billion (based on an average of Rs. 83.6/USD).

As per the just-released Economic Survey report of Tamil Nadu for 2025-26, with faster economic growth boosting the prospects, the state is poised to reach the $1 trillion economy mark by 2031, though a stronger US dollar may delay the timeline by a year.

The Economic Survey noted further -“Tamil Nadu aspires to become a trillion-dollar economy by 2030, a goal that carries transformative potential for its 7.7 crore citizens, particularly the youth seeking quality jobs and higher incomes. The prospect of achieving the target has significantly improved due to the recent surge in economic growth".

Also, the survey emphasised that TN’s per capita income growth has consistently outpaced the national average. In 2024-25, TN’s per capita income reached Rs 3.62 lakh, which is 1.77 times the national average of Rs 2.05 lakh, making Tamil Nadu the third-largest state in India in terms of per capita income.

However, based on my estimates, for Tamil Nadu’s GSDP to reach $1 trillion by 2030, it will require a compound annual growth rate (CAGR) of 21.8 per cent, which is rather difficult to achieve, despite recent stellar performance. Nonetheless, growing at a CAGR of 10.36 per cent, the state may become a $1 trillion economy by 2035 (10 years from 2025).

Currently, with a GDP of around $4 trillion, India ranks as the 4th-largest economy in the world and aspires to become a developed economy by 2047. To actualise this dream, the front-line states like Tamil Nadu must play their appointed roles. But what is the likely GSDP of Tamil Nadu by 2047?

The estimates differ:

CREDAI-Knight Frank Report: According to a January 2024 report by CREDAI-Knight Frank, Tamil Nadu’s nominal Gross State Domestic Product (GSDP) is estimated to expand to around USD 2.6 trillion by 2047-48. But the state will need to allocate capital expenditure of USD 111 billion to realise this potential growth.

I call it a realistic projection.

CII Tamil Nadu @100 Vision Report: According to a March 2024 Tamil Nadu@100 Vision Document by CII, Tamil Nadu will be able to secure the number one spot on the Gross State Domestic Product (GSDP) scale in the country with a $4.21 trillion economy in 2047, with the developments in industrial, digital and social infrastructure, global education and vocational skill development.

I call it an optimistic projection.

Aspirational Projection: There is also a suggestion that Tamil Nadu GSDP can grow to as high as $5 trillion by 2047 from the 2024-25 base of $373 billion.

I call it an aspirational projection.

The above three scenarios require sustained nominal CAGRs of

9.2 per cent for the GSDP to become $2.6T by 2047-48.

11.65 per cent for the GSDP to become $4.21T by 2047-48 and

12.5 per cent for the GSDP to become $5T by 2047-48.

Based on the above, if Tamil Nadu maintains its growth rate from the past 10 years, its economy could reach $4 trillion by 2047. However, as the economy expands, the growth rate usually slows, so a more realistic estimate for the state’s economy in 2047 is between $2.5 and $3 trillion.

However, for Tamil Nadu to actualise its dream of a $2.5 to $4 trillion economy by 2047, Chennai’s growth engine must fire all cylinders. That brings us to the following key questions-

What is the current GDP and per capita income of Chennai?

What is the contribution of Chennai to the overall GSDP of Tamil Nadu?

What are the key growth drivers of Chennai’s economy and

At what rate must Chennai’s economy grow to become $1 trillion by 2047?

Chennai GDP: Quite clearly, the economic growth of Tamil Nadu will be powered by its growth engine, Chennai, whose GDP in 2025 was estimated at around 116 billion (Rs. 6.5-11.95 lakh crore), building on the 2023-24 figure of US$103 billion (Rs. 8.51 lakh crore).

Chennai Per Capita Income: As of 2025-26, Chennai has an annual per capita income of approximately Rs. 6.46 lakh (around $7,000–$7,800 USD), reflecting high industrial and urban growth. It is one of India’s wealthiest cities and acts as a major economic hub, though it generally ranks below top-tier cities like Mumbai, Delhi, and Bangalore in overall per capita GDP.

Chennai’s contribution to the Tamil Nadu Economy: At $116 billion, Chennai’s metropolitan economy accounts for approximately 31% of the state’s GSDP, estimated to be $373 billion in 2024-25.

In rupee terms, Chennai’s $116 billion translates to about Rs 9.7 lakh crore at current exchange rates, confirming the state’s 31% share of the Rs 31.19 lakh crore GSDP.

Key Growth Drivers of Chennai’s Economy: Chennai’s metropolitan economy is propelled by automobiles, IT/software services, manufacturing (especially electronics/hardware), healthcare, and financial services, which together anchor its role as a diversified hub, contributing 30-32 per cent to Tamil Nadu’s GSDP.

The following are the primary growth drivers of Chennai’s economy:

Automobiles and auto components: Chennai produces 30% of India’s automobiles and 35% of auto parts, earning it the nickname “Detroit of Asia," with 60% of national auto exports from the region.​

IT, software, and BPO: A major exporter (second to Bengaluru), with electronics hardware from firms like Dell, Foxconn, and Samsung boosting growth.

Healthcare and medical tourism: Chennai’s healthcare sector stands out as one of India’s largest and most advanced among metropolitan areas, often called the “Health Capital of India" due to its high bed density and medical tourism draw.

Chennai has around 2.1 hospital beds per 1,000 population, surpassing most peers and nearing the WHO norm of 3 per 1,000. The city has over 18,000 total beds (half private, half public), serving residents plus 30-40% domestic and 45% foreign health tourists.

Ports and logistics: Chennai and Ennore Ports boost trade, aiding manufacturing and exports.

Emerging areas: Renewables, electronics, and logistics corridors like Chennai-Bengaluru Industrial Corridor.

Chennai to become a $1 trillion Economy: Given its importance for the Tamil Nadu economy, the Chennai economy must grow faster than the rate of growth of the state GSDP because the dream of the Tamil Nadu economy to become a $4 trillion economy by 2047 largely rests on the acceleration of Chennai’s Economy. The following is the calculus of the pathway for the Chennai economy to hit the $1 trillion mark-

$1 trillion by 2040 – Chennai’s economy must grow at a CAGR of 14.5 per cent, for a continuous 15 years, which has been the most recent growth rate of the state.

$1 trillion by 2047 – Chennai’s economy must grow at a CAGR of 10 per cent for a continuous 22 years.

$1 trillion by 2050 – Chennai’s economy must grow at a CAGR of 8.8 per cent for a continuous 22 years.

For Chennai to sustain 10 per cent GDP growth over the next 22 years and become a $1 trillion economy, the city needs to increase its annual capex-to-GDP ratio to 12-15 per cent. Additionally, if this materialises, it will significantly boost the city’s per capita income to around $50,000, assuming a 2047 population of 20 million. This would place Chennai in the upper-income bracket, well above Seoul and Shanghai’s current levels.

However, for Chennai to reach where it must, there are challenges galore, including, but not limited to, policy stability, major reforms, infrastructure overhaul, governance transformation, inclusive development, arresting urban decay, and making the city climate resilient.

The concluding Part II of the “Urban Quest" will analyse the key challenges and pathways to overcome them.

(The author is a multidisciplinary thought leader with Action Bias, India-based international impact consultant, and keen watcher of changing national and international scenarios. He works as president, advisory services of consulting company BARSYL. Views expressed in the above piece are personal and solely those of the author. They do not necessarily reflect News18’s views)

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