The Strait of Hormuz is expected to reopen under the U.S.-Iran framework. That alone is a major relief for energy markets. But the next dispute is already visible: will ships pass for free, or will Iran and Oman charge fees under another name?

President Donald Trump has used the language of “toll free” reopening. Washington wants Hormuz to return as close as possible to the prewar status quo: ships pass, oil flows, insurers calm down, and no new payment system becomes attached to one of the world’s most important maritime chokepoints.

Iran is using different language. Iranian officials have said there is no “toll,” but they have also discussed charges for services connected to safe passage, navigation, environmental protection, or maritime management.

That is the heart of the dispute. If a ship pays money because it passes through Hormuz, is that a toll? Or can it be called a service fee if Iran claims it is providing safety, traffic management, or environmental services?

The fight over Hormuz is no longer only about whether ships can pass. It is about who has the right to monetize passage.

Why the 60-day window matters

The current understanding appears to create a temporary no-fee period during the 60-day negotiation window. That means Hormuz can reopen immediately while the United States and Iran continue negotiating the harder details of the broader agreement.

For markets, this is useful. A 60-day window without charges can restart tanker movement, reduce the immediate war premium in oil prices, and give shipping companies enough confidence to test the route again.

But the 60-day period is not a permanent settlement. It is a pause. After that, Iran may try to revive the idea of a fee-based system, especially if it can frame the charge as a service fee rather than a transit toll.

That means the real issue has not disappeared. It has been postponed.

The market will therefore watch not only whether Hormuz reopens, but what legal and commercial terms are attached after the initial 60 days.

Toll or service fee: why the wording matters

The difference between a toll and a service fee sounds like wordplay. In maritime law, it matters.

A toll is a charge imposed simply because a vessel passes through a route. A service fee is a charge for a specific service actually provided, such as pilotage, port services, emergency support, navigation assistance, or pollution-response activity.

International law strongly protects passage through straits used for international navigation. The United Nations Convention on the Law of the Sea recognizes transit passage through such straits and limits the ability of coastal states to obstruct that passage. The IMO has warned that imposing tolls on ships transiting international straits would set a dangerous precedent. :contentReference[oaicite:1]{index=1}

But coastal states can still argue that they provide services related to safety, navigation, environmental protection, traffic management, or emergency response. That is the legal opening Iran appears to be exploring.

If the charge is general, mandatory, and linked to passage itself, other countries will likely call it a toll. If the charge is narrow, service-specific, transparent, non-discriminatory, and tied to actual maritime services, Iran may argue it is legal.

Iran’s legal strategy is simple: do not call it a toll. Call it a service charge.

Why Iran wants the fee system

Iran has several reasons to want a fee system.

The first is revenue. Iran needs money after war, sanctions, infrastructure damage, and economic isolation. A small charge on ships passing through Hormuz could become a large recurring income stream because the strait is central to global energy trade.

The second is leverage. If Iran controls the procedures, documents, traffic management, service charges, exemptions, and compliance rules around Hormuz, it gains influence over global shipping behavior.

The third is symbolism. Iran wants to show that it is not simply reopening Hormuz under American pressure. It wants to claim sovereign authority and regional control.

The fourth is bargaining power. Even if the United States rejects tolls, Iran can use the fee question as a negotiating chip in talks over sanctions relief, frozen assets, reconstruction funding, and security guarantees.

In other words, the fee issue is not only about money. It is a tool inside the larger peace bargain.

Why the United States rejects it

The United States opposes a Hormuz fee system because it could set a precedent.

If Iran can charge ships for passing through Hormuz, other coastal states may try similar models in other chokepoints. That would worry shipping companies, energy importers, navies, insurers, and trading nations.

Washington also fears that a fee system could become a hidden sanction-evasion tool. Iran could collect hard currency from global shipping, classify some vessels as cooperative or non-cooperative, and use access pricing as political pressure.

The U.S. position is therefore straightforward: Hormuz should reopen without new charges, conditions, or Iranian monetization of transit.

That is why the word “toll free” matters politically. Trump wants to say he forced Iran to reopen the strait without paying for passage.

Iran wants to say it protected its rights and can still charge for services.

Oman’s role is important

Hormuz is not only an Iranian waterway. Oman also borders the strait and plays a central role in regional diplomacy.

That is why Iran has discussed fee or management systems with Oman. A joint Iran-Oman framework would look more regional and less like unilateral Iranian pressure.

For Iran, Oman’s involvement can make the system appear more legitimate. For the United States, Oman’s involvement may make compromise easier if the final arrangement is limited, transparent, and not framed as a toll.

But Oman’s role does not automatically solve the legal problem. If ships are charged simply because they pass through an international strait, many countries will still object.

The final design will matter. A narrow safety-service framework is one thing. A broad compulsory passage fee is another.

Oman can help make the system look regional. It cannot make an illegal toll legal by changing the label.

The reconstruction fund may become part of the package

The fee dispute may eventually connect with Iran’s proposed reconstruction fund.

If a $300 billion reconstruction and development fund is created, companies and governments that participate may seek preferential treatment. That could include project access, energy contracts, infrastructure concessions, insurance support, or possibly shipping-related advantages.

One possible structure is a package system. Companies or countries that participate in Iranian reconstruction could receive smoother logistics, fee exemptions, priority service, or discounted transit arrangements.

This is still speculative because the fund’s governance structure has not been fully disclosed. But the logic is easy to understand. Iran needs capital. Shipping companies need predictable passage. Construction firms need payment security. Energy buyers need stable supply. A fund could bundle these interests together.

For companies, that may reduce risk. Instead of signing directly with the Iranian government, they could contract through a fund, receive clearer payment terms, and use the fund as a buffer against political risk.

For Iran, the fund could help turn future oil, gas, port revenue, or transit-related income into present financing.

For Washington, the fund could become a control mechanism: Iran gets economic benefits only if it keeps Hormuz open and complies with the wider agreement.

Who ultimately pays?

Even if Iran calls the charge a service fee, the economic burden must land somewhere.

The first payer may be the ship operator. But the cost will not stop there. Shipping companies pass costs to charterers. Charterers pass costs to energy traders. Energy traders pass costs to buyers. Buyers may demand discounts from oil producers.

That means Gulf producers could eventually carry part of the cost. If crude exported through Hormuz becomes more expensive to move, buyers may ask for lower prices to compensate.

This is why Saudi Arabia, the UAE, Qatar, Kuwait, Iraq, and other regional exporters will watch the fee issue closely. They may not want Iran to collect money from the passage of their energy exports. They may also not want a new cost that makes Gulf barrels less attractive compared with non-Gulf oil.

In the short run, the fee may look like a shipping charge. In the long run, it can become a discount pressure on Gulf energy.

The invoice may go to the ship. The economic burden may end up with the oil producer.

Insurance could be more important than the fee itself

The fee amount may not be the largest cost. Insurance and uncertainty may matter more.

If the fee system is clear, legal, predictable, and internationally accepted, shipping companies can price it. A known cost is manageable.

But if the fee system is disputed, selectively enforced, or linked to political conditions, insurers may keep premiums high. Tankers may require naval advisories. Charterers may demand higher compensation. Buyers may avoid the route if legal risk is unclear.

This is why Hormuz normalization requires more than reopening the waterway. It requires predictable rules.

A tanker captain does not only need the strait to be open. The operator needs to know the documents, fees, risks, insurance status, sanctions exposure, and emergency procedures before entering the route.

Why this matters for Korea and Japan

Korea and Japan are among the countries that must watch this issue carefully.

Both depend heavily on imported energy. Both are sensitive to Gulf shipping costs. Both rely on stable LNG and crude flows. A small change in Hormuz pricing can become a larger issue through freight, insurance, refining margins, electricity prices, and inflation expectations.

If Iran’s fee system becomes permanent, Korean and Japanese refiners may seek price discounts from Gulf suppliers. They may also diversify supply, increase inventories, use alternative crude grades, or push for government-level diplomatic guarantees.

The issue is not only whether oil arrives. It is whether oil arrives at a predictable cost.

For energy-importing economies, that difference matters.

Why the legal precedent is dangerous

The IMO’s concern is that Hormuz could become a precedent for other straits.

If one strategic waterway begins charging a fee for passage under the language of services, other coastal states could attempt similar systems. The Bosporus, Bab el-Mandeb, Malacca, or other chokepoints could become sites of future pricing disputes.

Even if each case is legally different, the political precedent matters. Global shipping depends on predictable transit rights. If every chokepoint becomes a revenue instrument, the cost of trade rises.

That is why the United States, Europe, Asian importers, and shipping bodies are likely to resist broad Hormuz charges. They are not only worried about Iran. They are worried about the model.

The danger is not one fee in one strait. The danger is a world where every chokepoint becomes a toll booth.

What to watch after the 60 days

The first thing to watch is the final language of the agreement. If the text says “no tolls” but allows “service fees,” the dispute will continue.

The second is whether Oman formally joins a maritime management framework. Joint administration may soften the politics, but it will not eliminate legal objections.

The third is whether the fees are voluntary or mandatory. A mandatory charge for all vessels will look like a toll. A narrow charge for actual services may be easier to defend.

The fourth is whether fees are discriminatory. If Iran offers exemptions to friendly countries or reconstruction-fund participants, the system will become politically explosive.

The fifth is insurance pricing. If war-risk premiums fall, the market believes Hormuz is normalizing. If premiums remain elevated, the market does not trust the deal.

The sixth is crude pricing. If buyers start demanding discounts on Gulf barrels, the fee debate will move from law into energy economics.

Conclusion: Hormuz is open, but not settled

The reopening of Hormuz is a major diplomatic and economic relief. It lowers the immediate risk of an energy shock and gives the U.S.-Iran framework room to breathe.

But the toll-versus-fee dispute shows that the agreement is still incomplete. Trump wants no charges. Iran wants room to charge for services. Oman may become part of the management structure. Shipping firms want predictability. Energy importers want low costs. Gulf producers do not want Iran collecting money from their export route.

The most likely short-term outcome is simple: no fees during the 60-day negotiation period, followed by a fight over what comes next.

That means the world should not treat Hormuz as fully normalized yet. The strait may reopen physically before it is settled legally, commercially, or diplomatically.

The simplest way to read the Hormuz fee dispute is this: Iran may accept “no tolls” for now, but it is trying to preserve the right to charge for passage under another name later.