How to plan a fortnightly shop around the specials cycle

Most advice about shopping the specials assumes you enjoy shopping the specials. Most people do not. What follows is a system designed to take about ten minutes a fortnight, produce most of the available saving, and then get out of the way.

The shape of it

One main shop every second Wednesday or Thursday, built around the new catalogue. One small top-up in the off week for fresh things only — milk, bread, produce. That is the whole structure.

Wednesday matters because that is when both chains change specials, and because promotional stock on popular lines runs out. Fortnightly rather than weekly matters because it halves the number of trips, and a trip to a supermarket is where unplanned spending happens.

Step 1: Write your core list once

Not a shopping list — a list of the products your household actually consumes on repeat. For most people it is between fifteen and thirty items. Coffee, the laundry liquid you like, the cereal your kids eat, dishwasher tablets, the brand of tinned tomatoes you cook with, toothpaste, pet food.

Write it down properly, in a note on your phone, grouped roughly by category. You will do this once and then edit it occasionally for years. This list is the entire mechanism: everything else in the system is just checking it against what is cheap this week.

Step 2: Split the list in two

Go through your core list and mark each item as either:

• Buy on special only. Things that keep and that you can buy ahead — cleaning products, personal care, pet food, tinned goods, coffee, frozen items, paper goods. You never pay full price for these; you buy two months' worth whenever they come round.
• Buy as needed. Fresh produce, dairy, bread, meat. You buy these when you need them, at whatever they cost, and a special is a bonus rather than a trigger.

Typically about two-thirds of a core list falls into the first group. That two-thirds is where essentially all of the achievable saving lives.

Step 3: The Wednesday check

On the morning of your shopping day, compare the new half price list against your "buy on special only" items. This is a two-minute job if the deals from both stores are in one place — which is what this site's front page is for. Use the search box for the specific brands on your list rather than scrolling.

Anything on your list that is on special goes in the trolley in quantity. Anything that is not, you skip entirely this fortnight — you have stock, because you bought ahead last time it was cheap.

Step 4: Plan meals from what is discounted, not the other way round

This is the step that separates people who save money from people who merely intend to. Instead of deciding on Sunday what you will eat and then buying it at whatever price, look at what is genuinely cheap and build four or five dinners around it.

In practice that means checking the meat, frozen and produce specials first, picking a protein, and working outwards. If chicken thigh is discounted, that is three meals sorted. This is a small shift in order of operations and it has a larger effect on a grocery bill than any amount of coupon-clipping. There is more on this in meal planning around half price meat and dairy.

Step 5: One shop, one store — usually

Visiting both Coles and Woolworths to catch the specials at each is almost never worth it. The extra saving on a normal shop is small, and it costs you a second trip, a second car park and a second round of impulse purchases. Pick whichever store has the better half price list for your items this fortnight and do the whole shop there.

The exception is when something on your list is expensive and heavily discounted at the other store — a $60 nappy box at half price justifies a detour in a way that $4 off pasta sauce does not.

Step 6: The off-week top-up

In the week between main shops, buy fresh things only. Set yourself a rule that you do not walk down any aisle you do not need, because the off-week trip is where a fortnightly system quietly turns back into a weekly one.

Online delivery or click-and-collect is genuinely useful here: it makes an unplanned purchase require a deliberate search rather than a glance at a shelf.

Common ways this falls apart

• Shopping hungry, or with tired children. No system survives either. Go after a meal, alone if you can, or order online.
• Treating the specials list as a shopping list. It is a filter for your list, not a replacement for it. Buying discounted things you do not need is the fastest way to spend more while feeling thrifty.
• Not checking what you already have. Once you start buying ahead, you need thirty seconds looking in the cupboard before you write the list. Otherwise you will own five bottles of the same thing.
• Chasing every discount. The goal is not to capture every possible dollar. It is to get most of the available saving with a routine you will still be following in six months.

How much does this actually save?

It depends entirely on what you buy, so treat any specific figure with suspicion. What can be said confidently is where the saving comes from: shifting the two-thirds of your regular list that keeps well onto a buy-only-on-promotion basis, and cutting the number of shopping trips. Both effects are real, both are repeatable, and neither requires you to change what you eat or which brands you like.

Next: what the catalogue terms actually mean, and the traps to avoid.