U.S. Treasury banking sanctions against Iran has opened financial institutions to additional risk.
Mitigation strategies to avoid risk vary depending the financial instituions region.
Banking institutions must know where their goods really come from, who touched them along the way, and whether the deal makes sense.
Just as we have seen with tariffs, sanctions also have ripple effects beyond the intended target.
Compliance risks for global financial institutions have increased significantly since the U.S. Department of the Treasury’s ongoing Operation Economic Outcast has drastically expanded banking and sectoral sanctions against Iran.
The latest Iran banking sanctions show how financial restrictions can reach beyond individual banks and companies, affecting correspondent banking, trade finance, payments, and the intermediaries that keep commerce moving.
Sanctions follow the goods, the vessels, and the money together.
The Trump Administration’s sanctions on Iran are tightening the financial noose by targeting the logistics and banking plumbing, not just the players.
Since August, FinCEN (Financial Crimes Enforcement Network), a bureau of the U.S. Department of the Treasury that protects the financial system from illegal use and money laundering, has moved to cut off fund transfers tied to the Russia-linked A7 Network, a shadow banking channel Tehran has used to launder billions.
That puts Iran sanctions compliance directly into the broader supply-chain equation. Banks and companies now need to understand not only who they are paying, but how money moves through intermediaries, jurisdictions, and trade networks.
OFAC (Office of Foreign Assets Control, a financial intelligence and enforcement agency of the Treasury) has sanctioned foreign banks in Russia and Turkey for moving Iranian oil money. On Thursday, OFAC extended sanctions to Iran’s auto and rail industries, and suspended civil aviation licenses that once gave companies a legal fallback.
The U.S. is not the only one squeezing Iran. London has followed suit by banning new correspondent relationships with Iranian banks and doubling penalties for violations.
Key Regulatory Actions to Know
Here are the banking and sectoral sanctions against Iran between August–October:
Shutting down the A7 shadow banking network: FinCEN has proposed a rule barring fund transfers that involve sub-agents of the Russia-linked A7 Network, which the Central Bank of Iran and the IRGC have used to launder billions of dollars.
Going after third-country enablers: OFAC sanctioned major foreign financial institutions, including Russia’s VTB Bank and Turkey’s Golden Global Investment Bank, for moving Iranian oil revenue, settling currency trades, and helping Tehran evade sanctions.
Widening sectoral sanctions: OFAC extended Executive Order 13902 to Iran’s rail sector and to its automotive sector, including Iran Khodro and SAIPA. Financing or supplying either industry is now sanctionable.
Pulling general licenses: Washington suspended key civil aviation authorizations under the Iranian Transactions and Sanctions Regulations (ITSR). This leaves companies with fewer fallback options and pushes more activity into the specific-license process.
The UK falls in line: The Iran (Sanctions) (Amendment) Regulations 2026 bar new correspondent banking relationships with Iranian banks and double the maximum penalties for violations.
Bank Exposure and Compliance Risks
For banks, the exposure is existential.
Losing access to U.S. dollars: Banks that process transactions for shadow or designated third parties risk a Section 311 designation, which can cut them off from U.S. correspondent accounts and, with them, the dollar clearing system.
Secondary sanctions exposure: Non-U.S. banks that keep doing business with sanctioned Russian and Turkish intermediaries or with Iran’s targeted industrial sectors now face direct OFAC enforcement and frozen assets.
Trade-based laundering keeps evolving: Bad actors are leaning harder on digital assets, front companies in the UAE and Hong Kong, and opaque maritime logistics to hide where the money comes from and where it goes.
“Risk is relative when it comes to shipping,” said Richard Meade, editor-in-chief of Lloyd’s. “When it comes to sanctions risk, and the compliance requirements, the decisions that are being taken within boardrooms within the Middle East are different to those being taken within the EU and the US.”
Tina Anand, Senior Analyst at Infospectrum, part of Lloyd’s List Intelligence, said under these sanctions, compliance has become more of a risk than credit for the banking industry.
“I think the biggest threat we are now seeing is not whether a counterparty can pay, but who are they actually dealing with,” said Anand. “When I went to the region many years ago, business at that time was built on trust and family relationships, and it was mainly domestic. That’s changed now.”
Anand explained companies have expanded into global markets and new sectors, and because of that their exposures have changed.
“Pressures are now coming at several directions all at the same time,” said Anand. “You are seeing disruptions around the Hormuz and the Red Sea, which is pushing trade through new routes and new intermediaries. The sanctions rules keep changing, and lenders are asking much tougher questions. So companies are now really investing in compliance, screening their counterparties, looking at the ownership structures and vessels far more rigorously than they did before.”
These swift changes mean companies need to invest more in their compliance. They are also looking at the Middle East conflicts from a longer-term perspective now.
“They understand that the situation in the Hormuz is here to stay,” said Anand. “They are not seeing it now as a short-term thing. They are building their strategies around. This is the future.”
One example Anand gave of the changing sanctions landscape, was OFAC’s General X license, which allowed companies to basically sell Iranian crude, including dollar payments to Iran.
“However, two weeks later, after three vessels were attacked in Hormuz, that license was revoked,” said Anand. “ So, what was permitted one day was prohibited the next.”
In August, the U.S. Treasury cut off UAE branches of Banque Misr from the U.S. dollar system over alleged ties to Iran. People in the markets told Anand that some suppliers went unpaid, causing delays.
“There’s extra scrutiny now on energy companies, even shuttling tankers at the moment, she continued. “That's creating a conflict in terms of compliance risks because you have the Iranian blacklist of certain vessels and rules that go along with that, and also the Western sanctions enforcement. So you have to deal with two different rule sets at the same time. Companies are caught between the two.”
Banking sanctions are not uncommon.
Citibank’s London branch was fined by the UK’s Office of Financial Sanctions Implementation fined Citibank’s London branch for £4,732,830.58 for breaching UK Russia sanctions and the Global Anti-Corruption sanctions rules on August 11, 2026. Most of the breaches happened between February and November 2022, after Russia invaded Ukraine.
In May, OFAC announced a $275 million settlement with Adani Enterprises over Iranian LPG. Between November 2023 and June 2025, Adani bought 35 LPG cargoes from a Dubai-based trader, which OFAC did not name. The trader falsely claimed the gas came from Oman and Iraq, and the cargoes were imported through Mundra port in Gujarat. Adani paid for these shipments in U.S. dollars, so the money ran through American banks. There were 32 payments, totaling about $192 million.
“OFAC said the red flags were obvious,” said Anand. “Prices were well below market, and the listed loading port couldn’t even export that kind of LPG.”
These red flags were not picked up or ignored.
“Regulators expect companies to do more of their own checking,” continued Anand. “The bigger shift is that your risk no longer stops at your direct counterparty. It extends to everyone they do business with, whether that’s sanctioned entities, illicit suppliers, or money routed through high-risk jurisdictions.”
That is where Iran shadow banking becomes particularly important to global financial institutions. The more sanctions expand across trade, shipping, and financial channels, the harder it becomes to assess risk using a single counterparty or transaction. Banks need visibility across ownership, payment flows, vessels, suppliers, and jurisdictions to understand the full exposure.
Individuals are exposed too.
In January, OFAC personally sanctioned five ship captains for commanding tankers that delivered fuel to Houthi-controlled ports.
In today's sanctions environment, compliance can't stop at checking who is paid. Companies need to know where their goods really come from, who touched them along the way, and whether the deal makes sense.
For banks, traders, and global companies, effective Iran sanctions compliance increasingly means connecting financial due diligence with trade and logistics intelligence. The challenge is no longer simply identifying a sanctioned name; it is understanding the network behind the transaction.
Why? Because regulators won't accept "we didn't know" when the red flags are there.