How do supermarket specials work in Australia?
The truth about supermarket specials: how hi-lo pricing works, why "50% off" is not always a real discount, and how to spot genuine deals.
Australian supermarket specials follow a predictable pattern: prices rise during regular weeks, then drop back to "special" prices that are often no cheaper than they were months ago. Pinch tracks real grocery prices at Coles, Woolworths, ALDI, and Harris Farm, with 52 weeks of price history on 74,000+ products. The data shows that 42.3% of Coles products and 35.3% of Woolworths products swing 15% or more on a repeating cycle. What looks like a deal is often just the normal price with marketing noise around it.
The weekly catalogue cycle
Australian supermarkets run on a predictable schedule. Coles and Woolworths update their specials on Wednesday and run until the following Tuesday. ALDI cycles on Wednesday and Saturday. Harris Farm varies by location. This cadence isn't random. It gives you a 7-day window to buy at special prices, then resets.
The cycle is tight enough to feel urgent (you have to act this week) but regular enough that savvy shoppers can plan around it. If you know something costs $3 on special every other week, you can time your purchase.
Hi-lo pricing: the special that isn't special
Here's how it works. A product sits at $5 for three weeks as the regular price. In week four, it goes on special for $3. Sounds like a win. But if you check the price history, it was $3 two months ago and will be $3 again in three weeks when it cycles back onto special. The $5 price isn't the normal price. It's inflated specifically so the $3 special looks good.
The ACCC Supermarkets Inquiry Final Report (2025) found that Australian supermarkets use illusory discounts systematically. Prices are raised, then advertised as being "on sale" at prices that are actually higher than they were weeks or months prior. It's legal. It works because most shoppers don't have access to price history.
You can't feel the trick with your eyes. You need data.
How to tell if a special is real
A genuine special is a price lower than the product has been in the recent past. A fake special is marketing around a normal price.
Look at price history. If something is on special for $3 but cost $2.50 just eight weeks ago, the special isn't great. If it cost $4.50 three weeks ago and cycles between $4.50 and $3, the $3 isn't a deal: it's the regular price on a repeating wheel.
This is why Pinch's 52-week history matters. One week of data is useless. Fifty-two weeks shows you the pattern. You see whether this price is genuinely low or just the normal point on a cycle.
The maths behind the cycles
Pinch data (May 2026) shows the scale. At Coles, 42.3% of products swing 15% or more on a repeating cycle. At Woolworths, it's 35.3%. That's not a rounding error or minor variance. That's deliberate pricing strategy baked into nearly half the catalogue.
A 15% swing on a $4 product is a 60-cent difference. Over a year, if you buy something weekly, you're looking at $30 in unnecessary spending just by shopping the "inflated" weeks instead of the special weeks. Across a trolley of 30-40 items, the difference adds up fast.
What the ACCC found
The ACCC's 2025 supermarkets inquiry reported that illusory discounting is widespread. According to the report, prices are marked up before going on sale, making the discount look bigger than it is. The report named all four major retailers. The ACCC found that this practice misleads shoppers about the true value of a sale.
The ACCC stopped short of forcing retailers to change the practice. But it made the problem visible. You're now armed with the knowledge that what looks like a special might just be marketing.
How price history solves it
You can't unsee a price cycle once you're tracking it. If you see that chicken breast runs $8 for three weeks, then $6 for one week, then back to $8, you're no longer fooled by the $6 special. You know what to expect. You plan to buy it the cheap week.
This is where tools that track prices over time become useful. Not useful for finding the cheapest item today (you can do that by comparing shops). Useful for understanding whether something is genuinely discounted or just cycling.
See the price history yourself
The best way to outsmart retail pricing is to see exactly how individual products move week to week. Pinch shows you 52 weeks of real prices at Coles, Woolies, ALDI, and Harris Farm so you can spot genuine specials and time your shopping to the cheap weeks.
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Methodology
- Source: Pinch price tracking database (74,000+ products, 4 retailers, 52 weeks of history)
- Cycle analysis: Products flagged as cycling where price variance exceeds 15% on a repeating pattern
- ACCC reference: Australian Competition and Consumer Commission Supermarkets Inquiry Final Report, 2025
- Data date: Analysis based on tracking data through May 2026