NZ Lunchbox Price Index

How the Price Index is built

The Kiwi Lunchbox Price Index tracks 20 staple lunchbox ingredients at three Auckland supermarkets — Woolworths and Pak'nSave on all 20, and New World on the 18 whose price is fresh enough to sit beside them. It exists because supermarket promotional pricing moves quickly, and parents need a stable reference point when planning a weekly shop. The Woolworths and Pak'nSave columns are the two that carry every item, and they are built the same way. The Woolworths column is pulled automatically each week from Woolworths' own online price feed, with a fixed product code per item so the same product is followed over time rather than whatever a search happens to return. The Pak'nSave column is pulled the same way, from Pak'nSave's own online shop with the store set to Ormiston — so it is that branch's Click & Collect price, which is not guaranteed to match the shelf tag — the dates for both are shown above. When those two dates drift more than 30 days apart, this page switches off the per-item winner marks and says so rather than presenting a stale gap as a store difference. There are no third-party data brokers and no marketing partnerships influencing what is recorded.

Where the prices are collected

• Pak'nSave Ormiston — 1 Bellingham Road, Flat Bush, East Auckland. This is our main supermarket; roughly 60% of our weekly shops happen here. Pak'nSave is consistently the lowest-price option for most items, which makes it a useful floor benchmark. Using the store I actually buy from is deliberate: these are prices I am paying, not a shelf I visited once for a comparison.
• Woolworths Ormiston — the Woolworths (formerly Countdown) store at Ormiston Town Centre, checked on the same trips. House-brand and branded items are both recorded. We also shop the Botany branches of both chains maybe 40% of the time; prices between the Ormiston and Botany branches are usually within a few cents, so the Ormiston branch is the one pinned for both columns.
• Where a product is unavailable at one store on the check date, the entry is left blank rather than substituted with an online estimate. Blank entries are visible in the table above.
• Both columns are online prices, not shelf tags. Woolworths figures come from Woolworths NZ's online price feed; Pak'nSave figures come from Pak'nSave's online shop with the store set to Ormiston. Either can lag an in-store change, and a Click & Collect price can differ from the shelf tag outright. That trade-off buys a weekly refresh of both columns instead of a quarterly one, and it is stated here rather than hidden. The May 2026 round below was walked in store, and is kept as-is.
• Some rows are not auto-updated on one side or the other, because no product at that chain matches the stated spec — for example Woolworths sells no 8-pack wrap, and Pak'nSave Ormiston sells Royal Gala apples only in a 1.5kg bag rather than loose per kilo. Those rows keep their last recorded figure until the spec is corrected. Leaving an old number visible is better than substituting a different product and calling it the same thing.

The 20 items in the basket

The basket is fixed across months so the index is comparable over time. It was chosen to represent a typical Term-1 NZ lunchbox week and includes:

• Bakery — wholegrain bread (700g), wraps 6-pack — farrah's premium white, bagels 4-pack.
• Produce — apples (1kg) — granny smith, bananas (1kg), carrots (1kg), cherry tomatoes (180g), cucumber — telegraph, lettuce — iceberg.
• Meat & Deli — sliced chicken (200g) — deli sliced, canned tuna (185g) — sealord in springwater, sliced ham (200g).
• Dairy & Eggs — cheese block (500g) — mainland mild, eggs (12-pack) — free range, yoghurt (1kg) — fresh 'n fruity greek natural, butter (500g) — anchor.
• Pantry — rice (1kg) — long grain white, pasta (500g) — penne, hummus (220g) — obela classic, peanut butter (380g) — pic's smooth.

Where a recipe-specific item changes between supermarkets (e.g., Woolworths stocks Anchor cheese; Pak'nSave stocks Mainland and house-brand), the cheapest comparable house-brand and brand-name version are both checked and the recorded price is the one most parents would actually buy.

How verification works on the check day

1. Same day, same morning, same operator. Both stores are visited within the same 2-hour window, normally on the third Saturday of each month, to minimise mid-day promotional changes. I do the check personally — no third-party shoppers or paid couriers.
2. Receipts kept from our own shops. The figures in the table are read from each chain's online shop, not from a till, but we keep receipts from our own shopping at these stores as evidence that they really are the branches behind the columns. Receipts are shown with the card number, auth code, and cashier details masked or cropped out (see the sample above) — the store name, items, and totals stay untouched.
3. Specials and member-only prices. Where a product is on a promotional special or requires a OneCard / club price, both the everyday-low price and the promotional price are noted in the "Notes" column. The headline figure is the everyday-low price — what a parent would pay without any loyalty programme — to keep the index honest across promotional cycles.
4. Which figure is canonical, per column. For Woolworths, the price feed is canonical — it is the retailer's own published number for the pinned product, and it is what allows a weekly refresh. For Pak'nSave, the canonical figure is that chain's own published price for the Ormiston store specifically, because Pak'nSave sets prices per store; every reading is checked to confirm which store it came back for. Both are the retailer's own online number rather than a shelf tag read by hand, and both refresh weekly.
5. What the automation refuses to do. The update job will not substitute a different product for a pinned one. If a pinned item is renamed, resized, or discontinued, the job reports it and leaves the old figure in place rather than filling the row with a near-enough match. An earlier version picked the median of a keyword search instead of a fixed product, and it swapped a Woolworths own-brand cheese block for a premium brand — a 40% jump that was a brand change, not a price change. That is the failure this design exists to prevent.

What the Price Index does not include

• A complete New World column. New World is in the table, but only on the items whose price is fresh enough to sit beside the other two — 18 of the 20 on the last read. 2 items are blank in that column (Wholegrain Bread (700g), Cheese Block (500g)), so the three-way basket is a smaller basket than the two-way one and the two totals are not interchangeable. Filling those gaps is the next thing on the list.
• Regional NZ stores. Every price on this page comes from two Ormiston stores in East Auckland. We have not measured Wellington, Hawke's Bay, Christchurch or Dunedin, so we publish no adjustment factor for them — a number we had not measured would be worth less than none here. Treat the index as an Auckland benchmark and check your own shelf.
• Online-only retailers. Costco, online specialty stores (FreshChoice online, Bin Inn, etc.) are not included. The 20-item basket focuses on mainstream supermarket pricing that most NZ families actually experience.
• Bulk and farmers' market pricing. Farmer's market produce in Auckland (Avondale, La Cigale, Parnell, etc.) is often cheaper for in-season fruit and vegetables, but the index uses supermarket prices because that is where the bulk of NZ families shop.

Limitations and disclaimers

• Prices are accurate as of the check date only. Supermarket prices change weekly, and the last-updated banner at the top of the table should be checked before relying on a figure for an actual shop.
• The index reflects two specific stores. Other Woolworths or Pak'nSave branches may differ by NZ$0.20–0.80 on most items. Central-city branches like Sylvia Park or Newmarket, for instance, tend to run slightly higher than the Ormiston stores due to retail rent differential.
• The index is not endorsed by Woolworths, Pak'nSave, Foodstuffs, or Woolworths NZ. It is an independent reader-facing reference. Brand and logo references are nominative use only.
• Where a price is unavailable or out of stock, the entry is left blank in the table. Blanks are not imputed or estimated.

How the index is used by the planner

The Kiwi Lunchbox Planner reads from the same priceIndex.json that powers this page. When the planner generates a weekly menu, the estimated lunchbox cost shown on the results screen is computed by summing the per-item prices from the latest index. If you toggle on "use this week's sales" in the planner sidebar, the planner additionally consults a separate weekly promotions feed (Woolworths and New World mailers) and discounts the affected ingredients on the spot.

Every cost estimate in the planner traces back to a named product at one of the two stores above — each chain's own published price for that exact product, with the Pak'nSave store pinned to Ormiston. Nothing in the planner is a guess or an industry average.

Editorial accountability

If you spot a price you think is wrong — perhaps you shopped at the same store the same week and saw a different number — please email it through the contact form. Submitted corrections are checked against the receipt and shelf-tag photo from that shop, and where the reader is right the figure is corrected and a new lastUpdated stamp is published. The audit trail (receipt scan + shelf photo) for every round is kept by the operator indefinitely. The same applies to the update date itself: this page shows when the index was last re-priced, not when the page was last touched, so a stale date is visible rather than hidden.

This page is owned, written, and maintained by Yong Jae Lee, a Senior Product Designer based in Auckland and the solo operator of Kiwi Lunchbox. There is no team. The same person who designs the site, checks the prices, and replies to your email is the person whose name is on this page.