Which one of the following was the cause of the Battle of Plassey ?

1. Rise of the East India Company and Early Trade Charters (basic)

The story of the British in India begins not with a grand conquest, but with a piece of parchment and a group of ambitious merchants. On December 31, 1600, Queen Elizabeth I granted a Royal Charter to the Governor and Company of Merchants of London trading into the East Indies. This charter gave them a 15-year monopoly on all trade in the East Indies Rajiv Ahir, A Brief History of Modern India, p.57. Interestingly, the company was tied to the English monarchy from its inception, with the Queen herself being one of the shareholders Bipin Chandra, Modern India (NCERT 1982 ed.), The Beginnings of European Settlements, p.51. Initially, their eyes were on the lucrative Spice Islands of Indonesia, but they soon realized the immense potential of the Indian mainland.

Success in India did not come easily. The English arrived as petitioners at the door of the mighty Mughal Empire. Early attempts, like Captain Hawkins' mission to Jahangir’s court in 1609, failed due to the entrenched influence of the Portuguese. The tide turned in 1612 when Captain Thomas Best defeated a Portuguese fleet. Impressed by British naval prowess, Emperor Jahangir granted permission to establish their first permanent factory at Surat in 1613 Rajiv Ahir, A Brief History of Modern India, p.38. This was followed by the diplomatic mission of Sir Thomas Roe (1615–1619), who secured royal farmans (orders) to trade and establish factories across Agra, Ahmedabad, and Broach Bipin Chandra, Modern India (NCERT 1982 ed.), The Beginnings of European Settlements, p.52.

As the 17th century progressed, the Company strategically developed three main nodes of power, known as the Presidencies. These were not just trading posts, but fortified settlements that combined commerce with military preparation:

• Madras (1639): Centered around Fort St. George.
• Bombay (1668): Received by King Charles II as part of a Portuguese dowry and leased to the Company for just 10 pounds a year Rajiv Ahir, A Brief History of Modern India, p.57.
• Calcutta (1690): Centered around Fort William.

Although they began as humble traders, the English were unique in their early willingness to mix trade, diplomacy, and war to secure their interests Bipin Chandra, Modern India (NCERT 1982 ed.), The Beginnings of European Settlements, p.52.

Sources: A Brief History of Modern India, Advent of the Europeans in India, p.38, 57; Modern India (NCERT 1982 ed.), The Beginnings of European Settlements, p.51-52

2. Mughal Farmans and the Grant of Trade Privileges (intermediate)

In the 17th and 18th centuries, the English East India Company (EIC) transitioned from being simple merchants to a powerful political entity. The backbone of this transition was the Farman — a royal edict or decree issued by the Mughal Emperor. While the British initially struggled to gain a foothold, their persistence led to a series of concessions that eventually gave them a massive competitive advantage over both Indian merchants and other European powers like the French and the Dutch.

The early years in Bengal were marked by friction. Although the EIC obtained trading privileges from Shah Shuja (the Governor of Bengal and son of Shah Jahan) in the mid-17th century, these lacked formal imperial confirmation, leading to frequent harassment by local officials History, class XI (Tamilnadu state board 2024 ed.), The Coming of the Europeans, p.255. However, the true turning point came in 1717, when the Mughal Emperor Farrukhsiyar issued what is often called the Magna Carta of the East India Company. This Farman granted the Company unprecedented legal and economic status across the empire.

The specific privileges granted under Farrukhsiyar's Farman were geographically diverse and economically transformative:

Region	Privilege Granted
Bengal	Exemption from all additional duties in exchange for a fixed annual payment of 3,000 rupees. The Company was also allowed to issue Dastaks (trade permits) for the transport of their goods.
Surat	For an annual payment of 10,000 rupees, the EIC was exempted from all duties on trade in this vital port city Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM, Advent of the Europeans in India, p.41.
Bombay	The coins minted by the Company at Bombay were decreed to have legal currency throughout the entire Mughal Empire Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM, Advent of the Europeans in India, p.57.

While these privileges were meant for the Company's collective trade, they soon became a flashpoint for conflict. Company servants began using Dastaks to evade duties on their private trade, which directly robbed the local Nawabs (like those in Bengal) of essential revenue. This systemic abuse of imperial Farmans created a deep-seated resentment among regional rulers, setting the stage for the military confrontations that would follow in the mid-18th century.

Sources: History, class XI (Tamilnadu state board 2024 ed.), The Coming of the Europeans, p.255; Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM, Advent of the Europeans in India, p.41; Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM, Advent of the Europeans in India, p.57

3. The Nawabs of Bengal and Sovereignty Issues (basic)

To understand why the British and the Nawabs of Bengal eventually went to war, we must first look at the unique position of Bengal in the 18th century. Bengal was the wealthiest province of the Mughal Empire. As the central Mughal authority weakened, strong leaders like Murshid Quli Khan and Alivardi Khan turned Bengal into a virtually independent state. While they sent a nominal tribute to the Mughal Emperor, they were the absolute masters of their own house Modern India, Bipin Chandra, Indian States and Society in the 18th Century, p.18. These Nawabs were capable administrators who promoted trade but remained deeply suspicious of the growing political ambitions of European companies.

The core of the conflict was a clash over sovereignty—who really held the power? The British East India Company operated under a Farman (royal decree) from the Mughal Emperor, which gave them the right to trade without paying customs duties. They used Dastaks (trade passes) to facilitate this. However, the Company's servants began using these passes for their private trade, depriving the Nawab of significant revenue. When Siraj-ud-Daulah became the Nawab, the tension reached a breaking point. He was alarmed by the British tendency to act as a state within a state, especially after seeing how European companies had usurped power in the Carnatic region Rajiv Ahir, Spectrum, Expansion and Consolidation of British Power in India, p.87.

The casus belli (immediate cause for war) was the unauthorized fortification of Calcutta. Claiming they needed to defend themselves against the French during the Seven Years' War, the British began strengthening Fort William without the Nawab's permission. To Siraj-ud-Daulah, this was a direct violation of his territorial sovereignty. When the British further insulted his authority by harboring political fugitives like Krishna Das and refusing to stop the fortifications, the Nawab realized that the Company was no longer just a group of traders, but a political threat that needed to be neutralized Modern India, Bipin Chandra, British Occupation of Bengal, p.66.

Sources: Modern India, Bipin Chandra, Indian States and Society in the 18th Century, p.18-19; Rajiv Ahir, Spectrum, Expansion and Consolidation of British Power in India, p.87; Modern India, Bipin Chandra, British Occupation of Bengal, p.66

4. Anglo-French Rivalry and Global Context (intermediate)

Concept: Anglo-French Rivalry and Global Context

5. Political Asylum and Diplomatic Friction (intermediate)

In the realm of 18th-century diplomacy, sovereignty was the most sensitive nerve for any Indian ruler. When a foreign entity like the East India Company (EIC) provided political asylum to a fugitive, it wasn't just a legal disagreement; it was an open declaration that the Company did not recognize the Nawab’s authority over his own subjects. This friction reached a breaking point in Bengal under Siraj-ud-Daulah.

The core of the dispute involved Krishna Das, the son of Raj Ballabh. Raj Ballabh was a high-ranking official under the previous Nawab, but he had fallen out of favor and was accused of massive corruption. When Krishna Das fled to the British at Calcutta, carrying immense treasures that the Nawab claimed belonged to the state, he became a political fugitive. By refusing to hand him over, the British were not just protecting a guest; they were actively shielding a man accused of stealing from the Bengal treasury Rajiv Ahir, A Brief History of Modern India, Expansion and Consolidation of British Power in India, p.88.

Why would the British take such a risk? It was a mix of strategic suspicion and arrogance. The Company suspected that Siraj-ud-Daulah was leaning toward their rivals, the French, and they wanted to keep "assets" like Krishna Das as leverage against the Nawab's administration. Furthermore, the EIC had already been abusing dastaks (trade permits) to avoid paying local taxes, causing a massive loss to the Nawab’s revenue History class XI (Tamilnadu state board 2024 ed.), The Coming of the Europeans, p.258. When the Nawab’s demands for the return of the fugitive were ignored, it confirmed his fears that the British intended to act as a "state within a state."

This diplomatic friction eventually turned into military conflict. Insulted by the Company’s refusal to return his subjects and their unauthorized fortification of Fort William, the Nawab marched on Calcutta in 1756. This sequence of events—asylum, refusal, and retaliation—served as the immediate casus belli (cause of war) for the Battle of Plassey History class XI (Tamilnadu state board 2024 ed.), The Coming of the Europeans, p.258.

Sources: A Brief History of Modern India, Expansion and Consolidation of British Power in India, p.88; History class XI (Tamilnadu state board 2024 ed.), The Coming of the Europeans, p.258

6. The Immediate Crisis: Fortification and the Fall of Calcutta (exam-level)

By the mid-18th century, the relationship between the Nawab of Bengal and the English East India Company (EIC) had reached a breaking point. While trade was the initial bond, the EIC began acting less like merchants and more like a sovereign state. The root of the crisis lay in the British refusal to acknowledge the Nawab's authority. Unlike previous rulers, the young and impulsive Siraj-ud-Daulah was acutely aware of how European companies were encroaching on Indian sovereignty Modern India, Bipin Chandra, p.66.

The immediate trigger for war was the unauthorized fortification of Calcutta. Citing the outbreak of the Seven Years' War in Europe, the British began strengthening the defenses of Fort William to protect against a potential French attack. When Siraj-ud-Daulah ordered both the British and the French to stop these military preparations, the French complied, but the British refused. This defiance was compounded by the Company's abuse of trade privileges (Dastaks) and their decision to provide asylum to Krishna Das, a political fugitive and son of Raj Ballabh, who had fled with state treasures Modern India, Bipin Chandra, p.66.

The fall of Calcutta on June 20, 1756, was a humiliation for the British. Siraj-ud-Daulah, perhaps overconfident, allowed the English survivors to escape to Fulta, an island near the sea. He underestimated the British naval superiority and their ability to launch a counter-offensive from Madras Modern India, Bipin Chandra, p.66. This period also gave rise to the controversial "Black Hole Tragedy," where British accounts claimed many prisoners died in a cramped dungeon—an incident used by the British to drum up moral outrage and justify their subsequent brutal retaliation The Coming of the Europeans, Tamilnadu State Board, p.258.

Sources: Modern India (Old NCERT 1982 ed.), The British Conquest of India, p.66; A Brief History of Modern India (Spectrum), Advent of the Europeans in India, p.40; History, Class XI (Tamilnadu State Board 2024 ed.), The Coming of the Europeans, p.258

7. Solving the Original PYQ (exam-level)

Now that you have mastered the concepts of mercantilism, sovereignty, and the Anglo-French rivalry in the 18th century, you can see how they converge in this question. The Battle of Plassey was not an isolated event but the climax of a power struggle between the Nawab's authority and the East India Company's territorial ambitions. To solve this, you must distinguish between long-standing grievances and the immediate casus belli. While trade disputes were constant, the act of building military defenses signaled a shift from trade to political defiance, which no sovereign ruler could ignore.

In walking through the reasoning, remember that Siraj-ud-Daulah’s primary concern was the protection of his sovereignty. When the English began to fortify Calcutta without his permission, it was a direct challenge to his rule. They justified this by citing the Seven Years' War in Europe, but the Nawab rightly saw it as an illegal encroachment. As highlighted in Modern India by Bipin Chandra, the Nawab’s order to stop the fortification was met with defiance, leading him to seize Kasimbazar and eventually march on Calcutta. Thus, (C) is the correct answer because it represents the critical turning point where diplomatic friction turned into military confrontation.

UPSC often uses "half-truths" as traps to test your precision. For instance, option (A) is a distractor; the real economic issue was the misuse of Dastaks (trade permits) by Company officials to avoid duties, not the levying of heavy duties by the English. Option (B) regarding rivals is a contributing factor (such as sheltering Krishna Das), but it lacks the weight of the fortification issue. Finally, (D) is a common historical trap; while the French were the Nawab's allies, he was not their "pawn." He acted out of his own interest to preserve his throne. Always look for the provocation that forced the ruler's hand.