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Metrics type: Key Metrics • Category: Shipping & Courier

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At a glance

Average billed cost per Australia Post consignment over the trailing 30 days, computed as SUM(consignment_invoice_total) / COUNT(consignments). Includes base postage rate plus fuel surcharge plus any per-consignment surcharges (Extra Cover, signature on delivery, dangerous-goods handling, regional uplift). Does not include account-level monthly minimums or volume rebates which settle quarterly.

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Calculation

Calculated automatically from your Australia Post data. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading.

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Worked example

The Brisbane outdoor adventure brand. Reading taken at 09:00 AEDT on 12 Mar 26 for the trailing 30 days (10 Feb to 11 Mar). 27,200 consignments, A$379,440 total billed. Card reads **A14.42∗∗,vsprior30−dayreadingofA14.42**, vs prior 30-day reading of A13.10. That is a +10.1 percent vsP, alert just tripped. Three observations:
  1. Service-mix shift, not rate-card change. Australia Post’s published rate card changed +1.5 percent in January (annual). Most of the +10 percent is mix: in the trailing 30 days the merchant ran a “free Express Post upgrade” promotion, lifting Express Post share from 22 percent to 30 percent. Express Post is 47 percent more expensive than Parcel Post; the mix shift drove most of the increase.
  2. StarTrack volume up. StarTrack Premium share grew from 7 percent to 10 percent following a B2B account onboarding. StarTrack is the most expensive tier (A24.50average);3pointsofmixshifttowarditaddsroughlyA24.50 average); 3 points of mix shift toward it adds roughly A0.50 to the headline.
  3. Climate surcharge on regional lanes. Australia Post added a temporary regional uplift after the wet-season fuel disruption, adding A0.20toA0.20 to A0.50 per consignment on lanes touching cyclone-affected depots. Roughly A$0.10 of the headline rise traces here.
The action is not “renegotiate the rate card”, it is “audit the Express Post promotion’s margin” and decide whether the conversion lift justifies the cost.

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Sibling cards merchants should reference together

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Reconciling against the vendor’s own dashboard

Where to look in Australia Post’s own portal: Australia Post Business → MyPost Business → Billing → Statement of Account for SME merchants. eParcel and StarTrack accounts use eParcel Customer Centre → Invoicing → Monthly Statement, which is the source of truth for finance reconciliation and includes volume rebates settled at month-end. Why our number may legitimately differ from Australia Post’s report: Cross-connector reconciliation:

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Known limitations / merchant FAQs

My Avg Shipping Cost is up 12 percent. What is the first thing to check? Service mix. The most common cause is a shift toward Express Post or StarTrack from Parcel Post. Check Shipments by Service and compare the period-over-period mix. If Express Post share moved 5+ points, the headline cost will move 4+ percent without any rate change. Second check: destination mix via Cost by Zone for a metro-to-regional volume shift. The portal invoice shows A13.80;VortexIQshowsA13.80; Vortex IQ shows A14.42. Which is right? Both, for different bases. The portal monthly statement is post-rebate net cost; the card is gross billed cost (pre-rebate). Volume rebates of 3 to 8 percent for high-volume eParcel and StarTrack accounts settle as credit notes 14 to 30 days after the invoice cycle. Recompute against the portal: A14.42×(1−0.043)=A14.42 × (1 - 0.043) = A13.80, which matches. Why is regional shipping so much more expensive than metro? Australia Post applies a regional uplift to lanes touching non-metro destinations: typically A2toA2 to A8 per consignment depending on remoteness band. The official Remote Locality List defines roughly 8,000 postcodes that attract surcharge. A merchant whose mix is 80 percent metro reads A11toA11 to A13 average; 80 percent regional reads A15toA15 to A22 average. The gap is structural, not a rate-card lever. Are international EMS costs included in this card? Yes. International EMS is billed in AUD at label print, included in the average. Note this can pull the average up by A5toA5 to A15 per international consignment vs domestic, so a small mix shift toward cross-border has outsized effect on the headline. Use Shipments by Destination to confirm international share. Australia Post raised rates 1.5 percent in January but my Vortex IQ shows +6 percent. Why? Two compounding effects. (1) Annual rate-card increase (typically 1 to 3 percent in January). (2) Service mix and destination mix shifts. The rate-card change is the floor; everything above it is mix or surcharge. Run the numbers per service tier to see the rate-card effect cleanly. My BFCM Avg Cost was 18 percent higher than Q3 baseline. What drives that? Three drivers, in order: (1) Australia Post’s peak surcharge (typically A0.30toA0.30 to A1.50 per consignment for Nov 25 to Jan 15). (2) Service mix shift to Express Post during Christmas-deadline pressure. (3) Heavier baskets (gift bundles weigh more, push consignments into the next weight bracket). The Q4 cost is structurally higher; benchmark against Q4 prior year, not Q3 same year. How do I reconcile against Shopify shipping_cost_per_order? For single-carrier merchants, the two should agree within 2 to 5 percent. Larger gaps trace to: free-shipping promotions that absorb cost into product margin (Shopify reads A0,thiscardreadsactualA0, this card reads actual A11 to A$25), shipping insurance add-ons (Shopify reads positive shipping revenue while this card reads positive shipping cost; net is what matters), or multi-carrier fulfilment where Shopify aggregates and this card is AP-only. StarTrack costs A24.50perconsignmentvsParcelPostA24.50 per consignment vs Parcel Post A11.40. When does the premium make sense? Three triggers: (1) Parcel value above A300whereextra−coversavingsonParcelPostoffsettheStarTrackpremium.(2)B2Brecipientrequiringproofofdeliveryonsignature.(3)Time−sensitivedeliverytoametrolanewhereStarTrack′sseparatefleethasmeasurablespeedadvantage.BelowA300 where extra-cover savings on Parcel Post offset the StarTrack premium. (2) B2B recipient requiring proof of delivery on signature. (3) Time-sensitive delivery to a metro lane where StarTrack's separate fleet has measurable speed advantage. Below A100 parcel value going to a metro residential address, Parcel Post wins on cost-vs-experience. My alert just fired at +10.1 percent and I made no operational changes. What now? First confirm the change is not a Mix shift (use Shipments by Service period-over-period). If mix is stable, check whether Australia Post issued a temporary regional surcharge (during fuel-cost spikes or wet-season disruption). If neither, audit the high-cost outliers via High-Cost Shipment Outliers, occasionally a few oversized parcels (cubed-weight uplift) skew the average. If still unexplained, raise it with your Australia Post account manager.

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Tracked live in Vortex IQ Nerve Centre

Avg Shipping Cost is one of hundreds of KPI pulses Vortex IQ tracks across Australia Post and 70+ other ecommerce connectors. Nerve Centre runs the detection layer; Vortex Mind investigates the cause when something moves; Ask Viq lets you interrogate any number in plain English. Start for free or book a demo to see this metric running on your own data.