Australia Post Prepaid Satchel Guide: Prices, Sizes, Limits and Best Uses
Whether you’re shipping 10 orders a week or sending a birthday gift interstate, the Australia Post prepaid satchel remains one of the simplest ways to get a parcel from A to B across Australia. You pay one flat price that covers both the packaging and the postage, and you don’t need to weigh anything at the counter or calculate zone-based rates.
Australia Post splits the information you need across three different web pages, and some of those pages disagree on basic details like how many satchel sizes exist. This guide pulls everything into one place: current 2026 prices, all five satchel sizes with real-world fit examples, a step-by-step usage walkthrough, and a clear framework for deciding when a prepaid satchel is the right call and when you’d be better off with a different shipping method.
If you’re a business owner evaluating your shipping workflow, you’ll also find a direct comparison between flat-rate satchels and pay-per-parcel courier pricing, so you can decide which model fits your volume and product mix.
What Is an Australia Post Prepaid Satchel
An Australia Post prepaid satchel is a poly or padded envelope that includes both the packaging and the postage in a single flat price, for sending items up to 5 kg anywhere within Australia.
Three rules to remember straight away. Postage is based on size, not weight, and prices include packaging and postage for sending within Australia. The domestic weight cap is 5 kg across all five sizes.
The two service types are Parcel Post (standard delivery, typically two or more business days) and Express Post (faster priority handling, with next-business-day delivery to major metro areas). Both include tracking at no extra cost.
International prepaid satchels are now only available for purchase in-store and are a separate product line – limited to 2 kg, for destinations including New Zealand, the UK, the USA, Canada, Ireland, and China. Don’t confuse them with domestic satchels.
| Feature | Detail |
|---|---|
| Postage included | Yes, in the purchase price |
| Weight limit | 5 kg (all sizes) |
| Pricing basis | Satchel size, not item weight |
| Service options | Parcel Post or Express Post |
| Where to buy | Online at auspost.com.au or in Post Offices |
| Sustainability | Many satchels contain 80% recycled plastic |
Australia Post Prepaid Satchel Prices in 2026
All prices below are effective 1 July 2025 per Australia Post’s retail pricing update.
| Size | Parcel Post (single) | Express Post (single) | Parcel Post (10-pack) |
|---|---|---|---|
| Extra Small | $10.05 | $13.05 | $97.99 |
| Small | $11.50 | $15.00 | $112.13 |
| Medium | $15.65 | $19.65 | $152.59 |
| Large | $19.75 | $24.25 | $192.56 |
| Extra Large | $23.80 | $32.30 | $232.05 |
The Extra Small Parcel Post satchel became available from 1 August 2025 from Australia Post Online Shop or Post Offices.
Because postage is priced by satchel size, a 4.9 kg item inside a Medium satchel costs the same as a 500 g item in the same satchel. The only variable is which size you buy.
On 1 July 2025, Australia Post increased Parcel Post postage prices by a weighted average of 1.95%. That’s a modest bump, and the flat-rate structure still makes satchels one of the most predictable shipping costs available.
Buying packs of 10 lowers the per-unit cost compared to singles. A 10-pack of Medium satchels works out to roughly $15.26 each versus $15.65 individually – not a huge gap per satchel, but at 100+ shipments per month those savings compound.
Prepaid Satchel Sizes and What Fits in Each One
A quick clarification before we get into the table: Australia Post’s own pages list either four or five sizes depending on which page you read. This guide uses the current five-size range (Extra Small through Extra Large), with Extra Small added from July/August 2025.
| Size | Dimensions | Max Weight | What Fits | When to Use It |
|---|---|---|---|---|
| Extra Small | Smaller than Small (check product page) | 5 kg | Jewellery, phone cases, small accessories | Single lightweight accessories or very small items |
| Small | 355 x 225 mm | 5 kg | A folded t-shirt, a single book, a small wallet | One-item clothing orders or slim retail goods |
| Medium | 390 x 270 mm | 5 kg | Two to three garments, a small pair of shoes | Standard eCommerce apparel orders |
| Large | Approx. 405 x 315 mm | 5 kg | Multiple clothing items, small sneakers, lightweight homewares | Larger single-item or multi-item orders |
| Extra Large | 510 x 440 mm | 5 kg | Bulkier apparel, multiple items, large flat goods | Bigger bundled orders or oversized flat products |
All five sizes share the same 5 kg cap, which means a heavy-but-small item might fit the weight limit of an Extra Small satchel but won’t physically fit inside. Always check both the size chart and your item’s packed dimensions before buying.
Satchels expand when filled, so laying your item on a flat satchel can be a useful test – but when in doubt, go one size up.
How to Use a Prepaid Satchel Step by Step
Five steps from desk to delivery:
Choose the right size – Match your item’s packed dimensions and weight to the size table above. If it’s borderline, size up.
Pack securely – Soft, non-fragile items can go straight in. Fragile items need internal padding or a rigid box inside the satchel – or a different packaging format entirely.
Seal and address – Use the peel-and-seal closure. Write the recipient’s address clearly on the front and include a return address.
Pick your service – Parcel Post for standard delivery or Express Post for priority handling.
Lodge it – Drop at a Post Office, post box (Parcel Post), or Express Post collection point. Tracking activates automatically.
Common Mistakes
Watch out for these before you seal and send:
Overfilling – If the satchel can’t seal flat along its adhesive strip, the item is too big. Force-sealing with tape often fails in transit.
Exceeding 5 kg – This voids the prepaid postage. The parcel can be returned or charged at a different rate at lodgement.
Wrong size – An item crammed into a too-small satchel risks rejection or damage. The cost difference between sizes is usually just a few dollars.
Missing sender address – Without it, undeliverable parcels can’t be returned to you. Tracking helps, but a clear return address is still essential.
Both Parcel Post and Express Post prepaid satchels include tracking as standard – no extra purchase or sign-up needed. And remember that prohibited goods rules still apply: aerosols, flammable liquids, and certain battery types can’t be sent via Australia Post.
Parcel Post vs Express Post Prepaid Satchel
Both products include postage and tracking in the purchase price. The difference is speed, and the price gap ranges from $3.00 (Extra Small) to $8.50 (Extra Large).
| Feature | Parcel Post | Express Post |
|---|---|---|
| Typical delivery time | 2+ business days | Next business day (major metro) |
| Single price range | $10.05 – $23.80 | $13.05 – $32.30 |
| Available sizes | Extra Small to Extra Large | Extra Small to Extra Large |
| Tracking included | Yes | Yes |
| International use | No (separate product) | Available for some international destinations |
| Best for | Everyday eCommerce, non-urgent parcels | Gifts, time-sensitive orders, SLA commitments |
**Choose Parcel Post if ** cost per parcel matters most and delivery timing is flexible.Choose Express Post if the item has a deadline, it’s a gift, or your customer has paid for faster shipping.
Here’s the volume math: a $3.50 gap on a Small satchel becomes $700 per year if you’re shipping 200 parcels. That’s meaningful enough to think carefully about whether every order truly needs Express.
When a Prepaid Satchel Is the Wrong Choice
Satchels are great within their lane, but four scenarios push you toward a different option:
The item exceeds 5 kg – Prepaid postage is void. The parcel will be returned or surcharged at lodgement.
The item is fragile – Soft poly satchels don’t protect glass, electronics, or breakables. A rigid box with proper cushioning is safer.
The item doesn’t fit any of the five sizes – Oversized, cylindrical, or oddly shaped goods need a box or a custom courier booking.
Your business ships mixed parcel types at volume – If you’re quoting individually for each shipment anyway, per-parcel pricing often beats buying flat-rate satchels in bulk.
Quick Decision Checklist
Run through these five questions:
Does it weigh under 5 kg? Yes / No
Does it fit inside the satchel without overfilling? Yes / No
Is it non-fragile or adequately protected inside? Yes / No
Am I sending to an Australian domestic address? Yes / No
Is flat-rate pricing competitive for this parcel? Yes / No
If all five answers are yes, a prepaid satchel is likely the right call. If any answer is no, you should explore alternatives.
How Prepaid Satchels Compare with Flexible Courier Pricing
The structural limit of prepaid satchels is straightforward: flat-rate packaging works well when items consistently fit the five size tiers and stay under 5 kg, but it has no flexibility for heavier, bulkier, or higher-volume shipments.
| Criteria | Australia Post Prepaid Satchel | Aeros Couriers |
|---|---|---|
| Weight limit | 5 kg max | Up to 25 kg per box |
| Pricing model | Flat rate by size | Pay-per-parcel with live quotes |
| Account required | No (buy in store or online) | No account application required |
| Insurance included | Not standard | Up to $500 per consignment included |
| Parcel types | Satchels only | Satchels, cartons, pallets |
| Best for | Consistent sub-5 kg domestic parcels | Mixed weights, larger items, volume shipping |
Choose prepaid satchels if your items consistently fit the size range, your shipment volume is low to moderate, and flat-rate predictability matters most.
Choose a platform like Aeros Couriers if parcels regularly exceed 5 kg, parcel types vary between orders, you need live quotes for each shipment, or your shipping volume makes flexible pricing more cost-effective. Aeros offers pricing starting from $4.90 for a box up to 25 kg, includes insurance up to $500 per consignment as standard, requires no account application, and lets you earn reward points that offset future bookings.
Sustainability, Tracking and Delivery Network Context
Australia Post states that many of its prepaid satchels contain 80% recycled plastic (post-consumer waste), making them a more sustainable choice than conventional poly mailers. For waste-conscious businesses, that’s a meaningful detail to communicate to customers.
Both Parcel Post and Express Post satchels include tracking as standard. No extra purchase, no sign-up.
The delivery network behind these satchels is substantial. More than 2.2 billion items were processed in FY25. In FY25, Australia Post processed 2.2 billion items and delivered 66.9 million internationally.
The eCommerce context matters too. Australians spent a total of $82.6 billion online in 2025, up 14% year on year. Around 82% of the population shopped online, and delivery choice is now a buyer expectation, not a nice-to-have. For volume shippers, that means the packaging and service you choose is part of your customer experience, whether it’s a prepaid satchel or a courier booking.
Buying Options, Bulk Packs and Business Workflows
Prepaid satchels can be bought as singles or in packs of 5 or 10, either online at auspost.com.au or at Post Offices across Australia.
Bulk packs lower the per-unit cost. If your business consistently ships in one or two satchel sizes, 10-packs are the obvious move. For reference, a Parcel Post Medium 10-pack runs $152.59 versus $156.50 if you bought 10 singles.
Australia Post also points higher-volume senders toward MyPost Business for account-based pricing and workflow automation, which can unlock additional rate discounts for growing businesses.
The workflow limits show up at scale, though. Manual prepaid satchel purchasing works well for low-to-moderate volume, but businesses processing 50+ parcels per month often need faster quoting, label generation, and carrier flexibility beyond a single flat-rate product. That’s where a platform like Aeros Couriers provides a practical step up – instant live quotes, no account application, and support for parcels, cartons, and pallets from a single dashboard.
The Bottom Line
The Australia Post prepaid satchel is a solid, predictable shipping product for items that weigh under 5 kg and fit inside one of five size tiers. Pricing is transparent, tracking is included, and buying is frictionless at any Post Office or online.
Where the model breaks down is at the edges: heavy items, fragile goods, mixed parcel types, or businesses that need per-shipment flexibility. If that sounds like your situation, a pay-per-parcel courier platform like Aeros Couriers gives you broader coverage without the account friction.
Use this guide as your reference point. Bookmark the pricing table, match your products to the size chart, and run the five-question checklist before your next shipment. The right packaging choice saves you money on every single order.
FAQ
How much is an Australia Post prepaid satchel in 2026?
Current prices range from $10.05 (Extra Small) to $23.80 (Extra Large) for Parcel Post, and $13.05 to $32.30 for Express Post. These prices took effect on 1 July 2025 per Australia Post’s retail pricing update. Buying 10-packs lowers the per-unit cost slightly.
What size prepaid satchel do I need?
Check the size table in this guide and match your item’s packed dimensions to the closest satchel. Both physical fit and weight (under 5 kg) matter – measure your item before buying. When in doubt, go one size up. The cost difference between adjacent sizes is usually only a few dollars.
Can I send more than 5 kg in a prepaid satchel?
No. The 5 kg limit applies to all five satchel sizes. Items over 5 kg void the prepaid postage and will either be returned or charged at a different rate at lodgement. For heavier items, you’ll need a different postage method or a courier booking.
What is the difference between Parcel Post and Express Post prepaid satchels?
Parcel Post is standard delivery in two or more business days at a lower price. Express Post offers priority handling with next-business-day delivery to major metro areas at a higher per-satchel cost. Both include tracking. The price gap ranges from $3.00 to $8.50 depending on satchel size.
Where can I buy prepaid satchels, and what should I use instead if a satchel doesn’t fit my needs?
Buy singles or packs of 5 or 10 at auspost.com.au or at any Post Office. For items over 5 kg, irregular shapes, or volume shipping, an instant-quote platform like Aeros Couriers is a practical alternative, with pricing starting from $4.90 and insurance up to $500 included per consignment.
