AIOC Net Profit, UK Tax Payments & Iran Royalty Payments, 1910-1951
Pre-nationalization era, no registry equivalent (and no other source in this project reaches this far back on oil-sector finance).
Event_Log
011901D'Arcy Oil ConcessionCorrelationExpected causation
William Knox D'Arcy granted a 60-year concession to explore for oil across most of Persia, the origin of the country's oil economy.
Why this link: The D'Arcy concession's terms, transferred to the Anglo-Persian Oil Company in 1909 and revised in 1933, directly structured the profit, UK tax and Iran royalty splits this chart tracks from 1910.
Caveat: The original 1901 terms were substantially renegotiated in 1933; later royalty levels reflect that revision as much as the original concession.
Lag: 9 years to APOC formation (1909); 32 years to first renegotiation (1933).Source: Encyclopaedia Iranica021908First major oil strike at Masjed SoleymanCorrelationExpected causation
Discovery of commercially viable oil deposits in Khuzestan, leading to the founding of the Anglo-Persian Oil Company in 1909.
Why this link: The 1908 discovery led directly to the 1909 founding of the Anglo-Persian Oil Company, whose profits, UK tax payments and Iran royalties this chart tracks from 1910.
Caveat: Profit and royalty levels after 1910 were shaped by pricing, wartime disruption and the 1933 renegotiation as much as by the original discovery.
Lag: 1-2 years to company formation (1909); chart data begins 1910.Source: Encyclopaedia Britannica··1914World War I begins — global gold standard and trade disruptionCorrelationExpected causation
Austria-Hungary's declaration of war on Serbia triggers general European mobilization; within days the London and New York stock exchanges close (the NYSE for four months) and virtually every belligerent power suspends gold convertibility to finance war spending, ending the pre-war international gold standard and disrupting global trade finance and shipping for the war's duration -- a disruption every combatant and neutral economy in this database's history had to navigate (see the Russian Empire and Iran entries).
Why this link: World War I turned Persian oil into a strategic wartime asset just as Britain's navy converted to oil-fired ships, driving up demand for Anglo-Persian Oil Company output during and immediately after the war, a shift visible in this chart's early profit and royalty figures.
Caveat: AIOC's profits in this era were shaped mainly by the terms of the 1901 D'Arcy concession and the 1913 Admiralty oil contract rather than by the war itself, so the war's specific contribution cannot be cleanly separated from these longer-running commercial arrangements.
Lag: Effects visible within 1-4 years (1914-1918).Source: Encyclopaedia Britannica Money — "The Decline of Gold"··1919Anglo-Persian Agreement signedCorrelationExpected causation
British Foreign Secretary Curzon's agreement would have given Britain control over Persia's military organization, customs tariffs, and finances in exchange for a GBP 2m loan at 7% interest; it proves so unpopular domestically and internationally that the Majlis never ratifies it, and it is formally denounced in 1921.
Why this link: The rejected 1919 agreement was Britain's attempt to lock in financial control over Iran alongside its existing oil concession; its failure left the D'Arcy/AIOC royalty and profit arrangement tracked in this chart as the main channel of British financial leverage in Iran for the following decade.
Caveat: The agreement itself was never implemented and has no direct data footprint; it is included as political background to the oil-concession finances this chart measures.
Lag: None (proposal rejected)Source: Encyclopaedia Iranica··1930Great Depression becomes a global crisisCorrelationExpected causation
The 1929 Wall Street crash (see USA entry) metastasizes into a worldwide economic collapse through 1930-33 as US banks call in foreign loans, commodity and raw-material prices collapse (hitting agricultural and mineral exporters worldwide), and global trade contracts by an estimated two-thirds in value by 1933 -- pressures that push Britain off the gold standard in 1931 (see separate GLOBAL entry), destabilize governments from Argentina (1930 coup, see ARG entry) to Germany, and squeeze agricultural-export revenue in developing economies including Iran, whose government replaced the silver-based qran with the rial in 1932 partly to arrest currency instability amid the global downturn.
Why this link: The worldwide trade and commodity-price collapse of 1930-33 slowed global oil-demand growth even as Iran's oil sector, governed by the long-term D'Arcy concession, was partly insulated from the shock, a divergence this chart's profit and royalty series can help illustrate.
Caveat: Concession-based royalty payments were set by contractual formula rather than spot demand, so the Depression's specific drag on AIOC's Iran-related income is difficult to isolate from the concession's own terms and renegotiations.
Lag: Effects unfold over 1930-1933.Source: Encyclopaedia Britannica — Great Depression031931Britain abandons the gold standardCorrelationExpected causation
Facing a run on Bank of England gold reserves, Britain suspends gold convertibility of the pound (which falls 25% against the dollar); much of the British Empire, Scandinavia and other trading partners follow within weeks, marking the interwar gold standard's terminal unraveling as the Great Depression deepens worldwide.
Why this link: Britain's exit from the gold standard sharply cut the gold value of Iran's sterling-denominated D'Arcy Concession royalties, a currency shock that directly triggered Reza Shah's cancellation of the concession in November 1932, a crisis visible as a break in this chart's royalty series.
Caveat: The concession's cancellation and 1933 renegotiation also reflected broader Iranian nationalist pressure and dissatisfaction with concession terms predating 1931, so the gold-standard exit is one trigger among several rather than the sole cause.
Lag: Effect appears within about 1 year (1931 to the Nov 1932 concession cancellation).Source: UK National Archives — "Going off gold"041932D'Arcy oil concession unilaterally cancelledCorrelationExpected causation
Reza Shah's government cancels the 1901 D'Arcy oil concession over royalty disputes, prompting Britain to refer the standoff to the League of Nations and the Permanent Court of International Justice; the dispute is resolved by a new 60-year concession agreed in 1933.
Why this link: Reza Shah's cancellation of the 1901 D'Arcy concession was a direct challenge to the royalty and profit-sharing terms this chart tracks, triggering the League of Nations dispute that produced the 1933 renegotiated concession.
Caveat: The dispute itself (not yet the new terms) is what this observation captures; the resolution is the following event.
Lag: 6 months to renegotiationSource: Encyclopaedia Britannica051933D'Arcy oil concession renegotiatedCorrelationExpected causation
New 60-year concession with the Anglo-Persian Oil Company, ratified by the Majlis on 28 May and given royal assent the next day, reduces the concession area by three-quarters and guarantees Iran a fixed per-ton royalty plus 20% of the company's distributed profits.
Why this link: The 1933 concession directly set the fixed per-ton royalty and 20%-of-distributed-profits formula that this chart's Iran royalty and AIOC profit series measure through 1951.
Caveat: None significant; this is the direct governing contract for the charted series.
Lag: ImmediateSource: Encyclopaedia Britannica··1946Azerbaijan Crisis reaches the UN Security CouncilCorrelationExpected causation
Amid Soviet-backed autonomous "People's Government" regimes established in Iranian Azerbaijan and Kurdistan (the Mahabad Republic) since December 1945, and Soviet troops remaining in northern Iran past the WWII withdrawal deadline, the UN Security Council adopts Resolution 2 on 30 January 1946 -- the first resolution in UN history -- addressing the dispute. Iran is pressured into a March 1946 deal granting the USSR 51% control of a joint north-Iran oil company before Soviet troops finally withdraw (6 May 1946); Iranian forces retake the region in December 1946, and the Majlis ultimately rejects the oil concession 102-2 in October 1947.
Why this link: Iran's refusal to grant the USSR a northern oil concession, at the heart of this crisis, preserved the AIOC's exclusive position and the royalty terms tracked in this chart until the 1951 nationalization.
Caveat: An indirect political-diplomatic channel; no direct data effect is measurable.
061951Oil industry nationalizedCorrelationExpected causation
Majlis votes to nationalize the Anglo-Iranian Oil Company under Prime Minister Mohammad Mossadegh; National Iranian Oil Company (NIOC) subsequently established.
Why this link: 1951 is the terminal year of this chart's AIOC profit and royalty series: nationalization directly ended the concession regime the chart measures.
Caveat: None significant; the chart's end date is precisely this event.
071960First IMF stand-by arrangement and stabilization programCorrelationExpected causation
Facing a balance-of-payments crisis after falling oil prices leave reserves covering barely one to two weeks of imports, Iran draws on a 35m-SDR IMF stand-by arrangement and adopts an austerity program that sharply curbs bank credit expansion and government spending through 1962.
Why this link: This 35m-SDR stand-by arrangement is Iran's first drawing on IMF credit, the direct origin of this series.
Caveat: None significant.