Australia Fuel Price Cycles: How the Weekly Discount-and-Recover Pattern Works

Terminal gate pricing and import parity

Australia's retail fuel market is built on a wholesale foundation called terminal gate pricing (TGP). Bulk fuel terminals — large storage facilities near ports — are the physical hub where tanker trucks load product for delivery to service stations. The major suppliers publish their TGP daily. This price is based on import parity pricing: what it would cost to import the equivalent volume of refined petrol from Singapore, which is the primary refining hub for the Asia-Pacific.

The TGP formula broadly follows: Singapore Mogas 95 (MOPS) + shipping + insurance + wharfage + quality adjustments. This means Australia's wholesale price tracks the Singapore MOPS platts price, which itself correlates with Brent crude but with refining margin and freight overlays.

The four major TGP-publishing suppliers are BP Australia, Viva Energy (Shell brand), Ampol, and EG Group (operating Woolworths Petrol sites). Independent retailers — including Costco, United Petroleum, and 7-Eleven — buy at TGP from these majors and typically retail at a margin above. The retail pump price then consists of TGP + retailer margin + GST (10%).

How the weekly cycle works

The classic Australian fuel price cycle follows a predictable pattern:

1. Spike phase (day 1): One major retailer raises its pump price significantly — typically 10–20 cents/litre above the prevailing price. Others follow within hours, as not following means selling at a loss if their wholesale cost has risen.
2. Plateau (days 1–2): All major retailers are at or near the higher price. Volume falls as price-sensitive consumers defer purchases.
3. Undercutting begins (days 2–4): Independents or one major retailer starts discounting to attract volume. Others follow to maintain market share.
4. Trough (days 4–7): Prices are near or below the wholesale cost — retailers accept thin or negative margins to maintain throughput.
5. Next spike: When the TGP moves up again (or a competitor judges the cycle has bottomed), the next spike is initiated.

The ACCC's analysis confirms that cycles typically run 7–14 days and that the amplitude (spike-to-trough range) reflects underlying wholesale cost volatility. During periods of stable MOPS/Brent pricing, the cycle amplitude compresses. During volatile crude markets, cycles can widen to 25–35¢/litre differences. Compare this with the currency-driven volatility in Turkey or the tax-driven stability in Norway.

City-by-city: how cycles differ

While the cycle is universal across mainland Australian capitals, its character differs by city:

Perth is unique: Western Australia's FuelWatch scheme requires retailers to submit the next day's price by 2pm each day, and these are published that evening. This creates a regulated 24-hour price transparency window — the only scheme of its kind in Australia. Retailers cannot change their notified price during that 24-hour period, which compresses the cycle's volatility. Critics argue FuelWatch raises average prices by eliminating real-time competitive discounting; proponents note it enables consumers to plan rationally.

ACCC oversight and transparency schemes

The Australian Competition and Consumer Commission (ACCC) publishes a detailed quarterly petrol monitoring report. Its role is to detect and deter anti-competitive conduct in the fuel market. The ACCC has investigated Australian petrol pricing multiple times and has consistently found:

• The cycle results from interdependent pricing behaviour — not unlawful cartel conduct
• Retail margins in Australian cities are comparable to similar markets globally
• Price transparency apps (NSW FuelCheck, Qld FuelCheck) have measurably reduced the average retail premium above TGP in the cities where they operate
• Regional and rural Australia pays significantly more than capital cities — the ACCC has flagged this as a persistent equity concern

The ACCC 2023 Petrol Monitoring Report found that Australian city retail margins averaged about 9¢/litre above TGP over the year — broadly consistent with other developed markets. The price elasticity of Australian petrol demand is estimated at around −0.2 in the short run, meaning a 10% price rise reduces consumption by only 2% — giving retailers considerable pricing power and supporting the cycle's continuation.

Structural trends: EV adoption and cycle persistence

Australia's EV uptake has been slower than Europe or China — EVs represented about 8% of new car sales in 2023 according to the Electric Vehicle Council — but it is accelerating sharply. The key question for the price cycle is whether declining petrol demand changes retailer incentives:

• Fewer litres sold means fixed station costs (lease, staff, equipment) must be recovered over a smaller volume base, pushing up the minimum viable margin per litre
• Surviving stations will likely be fewer but larger — the economics of high-volume discount sites improve relative to low-volume community stations
• The cycle itself may persist or intensify — as the market thins, fewer competitors means each has greater price-setting power

Australia's lack of a national carbon price on transport fuels (the carbon pricing mechanism repealed in 2014) means there is no policy mechanism to accelerate the transition the way Norway's CO₂ tax has. The pump price reflects international crude, refining margins, and the GST — not a carbon signal. This distinguishes Australia from the European approach covered in our EU fuel tax harmonisation analysis. For the global supply context that drives Australia's TGP baseline, see our coverage of the OPEC production quota system.

FAQ