How much could Trump's 'economic D-Day' sanctions hurt Iran? - BBC News

Iran has so far proved adept at finding ways around years of already punishing sanctions on its economy.

Image source, EPAByBernd Debusmann JrWhite House reporter Published21 August 2026Nearly six months after US President Donald Trump vowed a swift victory over Iran, the conflict appears to be at a standstill, with prospects of a military victory or negotiated settlement growing dimmer.

To break the deadlock, Trump has vowed an "economic D-Day" under which any country that does business with Iran would face "tremendous" economic consequences.

Iran, however, has long faced sanctions and has so far shown a willingness to endure pain, and a capacity to adapt to immense economic and military pressure as the conflict drags on.

The key question for the US then becomes, will further sanctions work where other strategies have failed?

The exact mechanics of the new US economic pressure campaign remain unclear, with Treasury Secretary Scott Bessent promising to reveal them in a news conference on 24 August.