Edition 3 · Thu 5 Nov 2026

The OikosAi Family Basket

A first-of-its-kind weekly price check of a healthy grocery basket for a family of four, at Aldi, Coles and Woolworths. Every Thursday we show the cost at each store, where each item is cheapest, and how much a family could save by splitting the shop.

Healthy groceries for a family of four. Buy each item where it's cheapest and save
$51.49a week21%less

$195.60 at the cheapest store for each item vs $247.09 paying the dearest price on every item. That's more than $2,000 a year.** Online prices 4 Nov 2026, 41 of 41 items.

Weekly cost of the same healthy basket*

All at Aldi
$222.33
All at Coles
$226.57
All at Woolworths (39 of 41 items)
$209.98
Cheapest store for each item
$195.60
Dearest price on every item
$247.09

No store was cheapest on everything: Aldi was cheapest on 24 items, Coles on 3, Woolworths on 7, and 7 were the same price at two or more stores.

How it adds up

For each item we take a week's amount for the family × the unit price at each store. Dearest price on every item: $247.09. Cheapest store for each item: $195.60. $247.09 − $195.60 = $51.49. $51.49 ÷ $247.09 = 21%. $51.49 × 52 = $2,677.48 (an illustration, not a forecast).

Edition 3 is here. The same healthy basket for a family of four, priced online at Aldi, Coles and Woolworths. No store was cheapest on everything: buying each item where it's cheapest came to $51.49 a week less than paying the dearest price on every item. I'll check again every Thursday.

Mounesh, founder of OikosAi · Updated 5 Nov 2026

*Weekly cost of the food a family of four eats, at minimum recommended serves. Pantry items such as oil and rice last several weeks, so your first shop costs more than one week's food. **One week × 52, an illustration, not a forecast. Online prices dated 4 Nov 2026. Prices change, check in store. AI assisted, may contain errors. Check before buying.

Save 21%on the same groceries

Buying each of 41 groceries where it was cheapest vs paying the dearest price, online at Aldi, Coles and Woolworths, 4 Nov 2026.

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Also from OikosAi: Today's top 3 savers · Price Watch

This week · Edition 3 · Thu 5 Nov 2026

Even against the cheapest single store$15.58 a week less than buying them all at Aldi, on the 32 items all three stores sell like-for-like.
With this week's specialsCheapest store for each item $195.60 vs $241.72 at the dearest: $46.12 (19%) less. Specials end, so check the date.

Where the savings hide

TomatoWoolworths $3.90 (Woolworths Gourmet Tomatoes Punnet 1kg) vs Coles $10.90 (Tomatoes Gourmet), per kg
64%less
Tinned sweet cornAldi $2.12 (Corn Kernels 420g) vs Woolworths $5.24 (Edgell Corn Kernels 420g), per kg
60%less
Cheese (low fat)Coles $10.50 (Dairy Tasty Light Cheese Block) vs Woolworths $19.60 (Woolworths Light Tasty Cheese Block 250g), per kg
46%less
Frozen peasAldi $2.49 (Garden Peas 1kg) vs Coles $4.50 (Frozen Garden Peas), per kg
45%less
White potatoWoolworths $2.50 (Woolworths Brushed Potatoes Bag 2kg) vs Coles $4.00 (Brushed Potatoes), per kg
38%less

Usual prices per kg, online 4 Nov 2026. The cheapest suitable product at each store, so brands, varieties and sizes can differ.

41 of 41 items comparedEvery item had a like-for-like price at two or more stores. Not available online this week, so no price used: bananas at Woolworths, baked beans at Woolworths.

Follow OikosAi for next Thursday's basket and today's top 3 savers