Jamaicans bruised by weeks of rising energy costs may finally have reason to expect some relief after international oil prices fell below US$80 a barrel, but motorists and electricity customers should not expect the decline to show up immediately in their bills.

Brent crude, the international benchmark, was trading at US$79.26 a barrel on Wednesday, close to its lowest level since early March, after falling about five per cent during the previous session. US West Texas Intermediate crude was trading at US$76.29 a barrel.

The retreat followed mounting expectations that an interim agreement between the United States (US) and Iran could lead to the gradual reopening of the Strait of Hormuz and allow more oil to leave the Gulf.

That represents a sharp turnaround from earlier fears that prolonged disruption in the Middle East could restrict global supplies and keep energy prices elevated.

For Jamaica, which imports most of the fuel used in transportation and electricity generation, sustained lower international prices could eventually reduce pressure on petrol and diesel prices, electricity bills, transportation costs and inflation.

The operative word, however, is eventually.

Oil prices on international markets do not pass directly or instantly to Jamaican consumers. Local prices are also affected by the cost of refined petroleum products, shipping, insurance, taxes, the Jamaican dollar and the timing of Petrojam’s purchases.

Petrojam adjusts its ex-refinery prices weekly, but any reduction will depend on whether the decline in international prices persists long enough to lower the refinery’s replacement costs.

The state-owned refinery recently widened the maximum weekly price adjustment for automotive diesel and ultra-low-sulphur diesel from $4.50 to $12.50 per litre. Petrojam said the change was intended to bring domestic prices into closer alignment with movements in the US Gulf Coast benchmark following sharp volatility in the oil market.

That mechanism could work in both directions. While it exposed motorists to larger increases when international costs were rising, it could also allow reductions to reach diesel users more quickly if global prices continue falling.

The latest Petrojam data showed 87-octane gasoline selling at an ex-refinery price of $193.63 per litre from June 11, while 90-octane gasoline was priced at $201.08. Automotive diesel was priced at approximately $190.65 per litre. Retail prices are generally higher after marketing and distribution charges are added.

The retreat in oil prices could also eventually ease pressure on electricity bills.

Jamaica Public Service Company Limited, JPS, says approximately two-thirds of the fuel used to generate electricity is liquefied natural gas, while about one-third is oil, with a smaller contribution from renewable energy. Changes in international oil and gas costs are reflected in what fuel suppliers charge JPS and independent power producers.

Those costs are passed through to customers in the fuel and independent power producer charges on monthly electricity bills.

A sustained decline in energy prices could therefore reduce those charges, although the effect may occur with a lag because electricity bills reflect fuel purchased during an earlier billing period. Natural gas prices may also move differently from crude oil, limiting the size of any reduction.

Lower oil prices would have wider implications for the economy.

Fuel affects the cost of moving people and goods, operating machinery, generating electricity and producing or distributing food. When energy prices rise, those costs can spread through the economy as businesses pass some of the increases to consumers.

A prolonged decline could help slow that process, giving the Bank of Jamaica additional support in keeping inflation within its target range.

It could also reduce the amount of foreign currency Jamaica spends importing fuel, easing demand for US dollars and improving the country’s trade position. However, that benefit would depend on both the volume of fuel imported and movements in the exchange rate.

Supply picture changes

The latest oil-market decline reflects a major shift in expectations about global supply.

The International Energy Agency, IEA, expects world oil supply to increase by approximately eight million barrels per day in 2027, compared with demand growth of about two million barrels per day. That could leave the market with a substantial supply surplus.

The anticipated US-Iran agreement could also allow Iran to resume additional oil sales and create an opportunity for countries to rebuild depleted commercial and strategic inventories.

Goldman Sachs has lowered its Brent crude forecast for the fourth quarter of 2026 to US$80 a barrel, down from US$90, after concluding that the agreement had reduced the risk of another major price spike.

However, the prospect of cheaper energy remains vulnerable to setbacks.

The memorandum between the United States and Iran has not been made public and is intended to extend a fragile ceasefire while negotiations continue towards a permanent agreement. Israel has distanced itself from the arrangement, adding uncertainty over whether the truce will hold.

Although markets are betting that the Strait of Hormuz will reopen, restoring normal oil production, refining and shipping could take weeks or months. Industry officials have warned that some operations may take even longer to recover fully.

Shipping insurance, security arrangements and the speed at which tankers resume using the waterway could also influence prices.

That means a single week below US$80 will not automatically deliver cheaper petrol or electricity in Jamaica.

For consumers to see meaningful relief, international oil and refined-product prices would need to remain lower, the Jamaican dollar would need to avoid significant depreciation, and the reductions would have to pass through Petrojam’s pricing formula and the electricity billing cycle.

The direction has changed. The relief, however, may take longer to arrive.