Why two servos 500 metres apart charge different prices

You have probably seen it: a BP on one corner at $1.95 and an independent across the road at $1.79. Same fuel, same suburb, same day. A 16-cent difference that costs you $8 on a 50-litre fill. Over a year, choosing the wrong one costs you $400 or more. So why does this happen?

It starts at the terminal gate

All fuel in Australia — regardless of brand — starts at one of a handful of import terminals and two remaining refineries (Lytton in Brisbane and Geelong in Victoria). The fuel itself is chemically near-identical. The terminal gate price (TGP) is the wholesale price at which fuel leaves the terminal. It is publicly available and typically varies by only 1 to 2 cents between suppliers on any given day.

So if the wholesale price is roughly the same for everyone, the retail price difference comes down to what happens after the fuel leaves the terminal: transport, franchise fees, brand overhead, site costs, and retail strategy.

Major brands vs independents

Major fuel retailers (BP, Shell, Ampol, Viva Energy/Coles Express) operate on a different cost structure to independents (Metro, United, Liberty, Puma, 7-Eleven). The big brands have higher overheads: national advertising, larger forecourt sites, more staff, and branded convenience stores. These costs get passed through to the pump price.

Independent operators typically run leaner. Smaller sites, less advertising, fewer staff. Some are owner-operated, meaning the owner is also behind the counter. Their wholesale contracts may be slightly different — some buy on spot markets rather than long-term supply agreements — but the main reason they are cheaper is lower overheads.

The ACCC's fuel monitoring reports consistently show independent stations pricing 5 to 10 cents below major brands in the same area. In some suburbs, the gap is wider.

Price cycle timing

Not every station moves through the price cycle at the same time. A major brand might raise its price on Wednesday morning while the independent across the street does not raise until Thursday afternoon. During this window, the difference can be 20 to 30 cents per litre.

This is not random. Major brands often lead the price increase (raising prices first), while independents lag behind, keeping their prices low for an extra day or two to attract volume. The ACCC calls this the "price leader" and "price follower" pattern.

Location and competition density

A servo on a busy highway with no competitors for 5 km has less incentive to compete on price. A servo in a cluster of 4 stations at an intersection has every incentive. This is why prices in suburban areas with lots of stations (like south-western Sydney or south-eastern Melbourne) tend to be cheaper than isolated stations on highways or in low-density areas.

Site costs also matter. A station on a prime corner in Bondi Junction pays dramatically more in rent or land value than one in Campbelltown. Those costs show up at the pump.

Shopper docket discounts

Coles Express (operated by Viva Energy) and Woolworths (partnered with various stations) offer fuel discounts linked to grocery spending. Typically 4 to 10 cents off per litre when you spend $30 or more on groceries.

These discounts make the effective price competitive, but the board price (the price displayed on the sign) remains higher. If you always use your shopper docket, the effective price at a major brand can match or beat an independent. If you do not use the docket, you are paying a premium for the convenience of the brand.

It is worth noting that shopper docket savings are not free money. Research by the ACCC found that participating stations often set their base prices slightly higher to fund the discount programme. The net benefit to the consumer is smaller than the face value of the discount.

Franchise vs company-owned

Some branded stations are company-owned (the oil company owns the site and employs staff directly) while others are franchised (an independent business owner pays to use the brand and buys fuel through the brand's supply chain). Franchisees sometimes have limited control over pricing — the brand may set recommended or maximum prices — while others have more flexibility.

This is why you can see two BP stations 3 km apart with a 5-cent price difference. One may be company-owned following head-office pricing, while the other is a franchisee adjusting based on local competition.

What you can do about it

• Never assume the nearest station is the cheapest. A 2-minute price check can save you $5 to $15 per fill.
• Favour independents. They are cheaper more often than not.
• If you use shopper dockets, compare the discounted price against the independent's board price. The independent may still be cheaper.
• Avoid highway and motorway stations unless you genuinely cannot exit. The convenience premium is significant.
• Use the Helira fuel finder to see every station near you sorted by price. The cheapest option is often one suburb over.

The price difference between two stations on the same street is not a mystery and it is not unfair. It is the result of different business models, different overheads, and different pricing strategies. The driver who takes 30 seconds to check before filling up captures the benefit every single time.