A man holds a bunch of Pakistani currency notes in this file photo. AP
Pakistan is in dire economic straits, with shrivelling foreign exchange reserves only enough to pay for around three weeks of imports amid an endless effort to service external debt.
The rupee shed 24.11 in the official interbank market on Thursday, falling as low as 255.43 rupees to the dollar, according to multiple sources.
The 9.6 percent decline of the rupee is the second-biggest drop in a single session, brokerage Topline Securities said.
The previous official low of 240 rupees was recorded in July 2022, when Pakistan's long-struggling economy was further weakened by political chaos and devastating floods.
In 2019, the government of former prime minister Imran Khan brokered a multi-billion dollar loan package from the International Monetary Fund (IMF).
But the economy slid backwards when Khan reneged on his promise to cut subsidies and market interventions that had cushioned the cost-of-living crisis.
Prime Minister Shehbaz Sharif, who ousted Khan in a no-confidence vote last spring, has also been reluctant to meet loan conditions amid falling popularity.
Exchange Companies Association of Pakistan President Zafar Paracha told AFP the cap was lifted on Wednesday "in consultation with the state bank".
Mohammad Sohail, the CEO of Topline Securities, told AFP: "Inflation is bound to rise further."
Pakistan is drastically short on forex reserves owing to persistently rising demand for the dollar.
Thousands of shipping containers packed with raw materials for industry, foodstuffs, and medical equipment are being held up at Karachi port because banks have refused to guarantee importers' dollar transactions.
Pakistan also suffered from a nationwide electricity outage earlier this week, linked to a cost-cutting measure, estimated to have cost the textile industry alone $70 million.