AusPost fuel surcharge jumps from 12% to 19.5% on 1 June 2026. That is a 7.5 percentage point increase applied to your base rate on every order shipped. Enter your numbers to see the exact dollar impact and what to do about it before June hits.
Your shipping numbers
All figures ex GST. Find your base rate in your AusPost contract or 3PL invoice — it is the rate before the surcharge is applied.
Shipping costs
Base rate per order (ex surcharge)
$
Your AusPost base rate before surcharge. Ex GST.
Current surcharge
%
Currently 12% (23 Apr–31 May 2026)
New surcharge (June)
%
19.5% from 1 June 2026
Shipping rate charged to customers
$
What customers pay. Enter 0 if always free.
% of orders on free shipping
%
Orders where you absorb the full shipping cost
Your business numbers
Monthly order volume
Total orders shipped per month
Average order value (inc. GST)
$
Your Shopify average order value
Gross margin
%
Revenue minus COGS ÷ revenue
What has actually happened to your shipping costs in 2026
Most merchants have not seen the April invoice yet — here is the full compounding picture
Extra shipping cost from June surcharge increase
$0
per month | $0 per year | absorbed directly from your margin
$0
Extra cost per order
$0
Current cost/order (inc. surcharge)
$0
New cost/order from June
Where the extra cost hits — per month
✅ Quick wins — implement before 1 June
Low friction, no customer confusion, high ROI
⚡ Considered moves — requires analysis first
Higher impact but needs careful modelling before doing
🔭 Longer term — worth exploring
Not a quick fix but meaningful structural improvement
The Boom take
Need help navigating the surcharge increase?Join Boom and build a more resilient ecomm business