A financial roadmap for Aussie families.
We don't compare grocery prices line-for-line. We identify the categories where Amazon AU genuinely beats the supermarket, and normalise everything to a unified cost-per-use metric — so you can see the difference at a glance.
How the savings work
Every switch in our list falls into one of two patterns:
- Brand vs generic. Branded medicines like Panadol and Nurofen contain the same active ingredients as their generic equivalents. CHOICE testing has confirmed there's no efficacy difference — but Australians pay up to nine times more for the brand.
- Bulk + Subscribe & Save. Amazon AU's Subscribe & Save program gives you 10% off (15% on nappies and wipes for Prime members) plus free delivery. Combine that with bulk pack sizes and the per-unit cost drops well below supermarket pricing.
How the maths works
Each product has a pack_size (loads, sheets, mL, pills, wipes) and a price_cents. We divide one by the other to get cost-per-unit, apply any S&S discount, then multiply by an assumed monthly usage to project savings.
What we don't do
We don't recommend products where the savings story doesn't hold up. If the per-unit cost is the same as or worse than the supermarket equivalent, you won't see it on the switch list — regardless of how the brand is marketed.
Where the figures come from
Every price quoted on Honest Trolley is sourced from one of: the public Woolworths or Coles product JSON (refreshed nightly), the Amazon AU Product Advertising API, CHOICE consumer-testing reports, or in-store receipts. The data-provenance accordion on every article lists which sources fed that specific piece. Where the maths comes from personal testing (Lucent Globe laundry sheets, the Who Gives A Crap per-sheet count), the article says so.
We have no editorial relationship with Amazon, Woolworths, Coles, or any brand named on the site. Some product links go through the Amazon Associates affiliate program — we earn a small commission if you buy through them, your price stays identical, and whether a product is affiliate-friendly has zero influence on whether it makes the switch list. The only thing that determines a recommendation is whether the per-unit cost actually beats the supermarket.