At a glance
Average billed cost per Royal Mail consignment, including base postage + fuel surcharges + Saturday surcharge + insurance / declared-value loading + remote-area surcharge. The unit-economics number that pairs with OTD Rate to make the cost-vs-reliability trade.
Calculation
Calculated automatically from your Royal Mail data. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading.Worked example
Same UK DTC homewares brand, 60 percent Royal Mail Tracked 48 / 40 percent Evri ParcelShop. Reading at 09:00 BST on 12 Mar 26, trailing 30 days. Royal Mail leg cost breakdown:
Evri leg for comparison: 7,820 ParcelShop consignments at £2.10 per parcel = £16,422 spent.
Combined carrier spend: £59,939 / 19,550 parcels = £3.07 average. The card reads £3.71 for the Royal Mail leg only; the all-carrier blended is £3.07.
Five things to notice:
- The cost-vs-reliability trade is real and quantifiable. Royal Mail Tracked 48 at £3.42 delivers 96.5 percent OTD; Evri ParcelShop at £2.10 delivers 92.5 percent OTD. The merchant accepts a 4-point OTD hit on the Evri half in exchange for a £1.32 / parcel saving (39 percent). For 7,820 Evri consignments that is £10,326 of monthly saving against an additional ~310 late deliveries / month. CFO judgement, not a card recommendation.
- Special Delivery 1pm is 2.4x the Tracked 48 cost but delivers 99 percent OTD. For high-value or fragile shipments, the spread is justified by claim-recovery economics; for everyday parcels it is overkill.
- The “rate suddenly degraded” debug case for cost. Royal Mail’s annual rate-card uplift kicks in 1 April each year, typically a 2 to 4 percent rise. A merchant whose Avg Cost climbs 4 percent on 1 April vs the prior 30 days is seeing the rate-card change, not a mix-shift. A merchant whose cost climbs 8 to 12 percent is also seeing surcharge or zone-mix change. During the CWU strikes of 2022 to 2023 some merchants emergency-uplifted to Special Delivery to maintain service, the avg cost spiked 30 to 50 percent for the affected weeks.
- Fuel surcharge moves monthly. Royal Mail publishes the next month’s surcharge mid-month based on the diesel-price index. A 5p / litre move in diesel translates to roughly 1.5 to 2 percent on the avg cost number. Tracked separately on Cost Trend.
- The £0.30 difference between £3.71 (this card) and £3.42 (Tracked 48 alone) is mix-effect, the Tracked 24 and Special Delivery shares pull the average up. If the merchant rebalances toward more Tracked 48, headline avg cost drops without any negotiation.
Sibling cards merchants should reference together
Avg shipping cost is the unit-economics dial. Pair it with these to make spend decisions:Reconciling against the vendor’s own dashboard
Where to look in Royal Mail’s own portal: Royal Mail Click & Drop → Reports → Spend is the small-merchant view. Royal Mail Business Account → Billing & Invoices → Monthly Statement is the authoritative view used for invoice reconciliation; the merchant’s monthly bill is the ground truth. The closest like-for-like view is All Services, Last 30 Days, Outbound Only, Net of Discounts. Why our number may legitimately differ from Royal Mail’s report:
Cross-connector reconciliation:
Known limitations / merchant FAQs
Royal Mail vs Evri, where is the cost saving? For parcels above 1kg destined to mainland UK home addresses, Evri ParcelShop is typically £0.80 to £1.50 cheaper per consignment than Royal Mail Tracked 48 at the same weight. For sub-500g letterbox-friendly items, Royal Mail’s Large Letter rates beat anything Evri offers. The healthy DTC pattern is to use both: Royal Mail for sub-1kg + letterbox, Evri for chunkier home-delivery. Your CFO will see the saving in thehermes_evri.her_avg_shipping_cost reading; the OTD trade is on hermes_evri.her_otd_rate.
What is the strikes-and-cost playbook?
During the CWU industrial action of Aug 2022 to Apr 2023 some merchants emergency-uplifted to Special Delivery to maintain service; avg cost spiked 30 to 50 percent for affected weeks. The decision was customer-experience driven, not cost-optimal. If a future stoppage hits, expect cost to rise temporarily; budget a 10 to 20 percent cost-headroom for stoppage weeks and reset when service resumes.
Tracked vs untracked, why does adding more untracked drop my avg cost so much?
Untracked is roughly 30 to 60 percent cheaper per consignment than tracked at equivalent weight. A 10-point shift toward untracked drops the headline avg cost by 30 to 50 pence. The hidden cost: untracked OTD is invisible (no scan), Failed Deliveries rises, customer-service WISMO ticket volume increases. Untracked is genuinely cheaper for low-value items where a customer refund on a lost parcel costs less than the year-round tracked premium.
My avg cost climbed 8 percent overnight, what is the playbook?
Ordered. (1) Check the date; if it is 1 April or 1 October, Royal Mail’s annual rate-card uplift may have triggered (uplifts are stepped, not gradual). (2) Check the fuel-surcharge update on the Royal Mail business news page (mid-month each month). (3) Check Shipments by Service for mix-shift, a sudden 5-point jump in tracked share moves headline cost. (4) Check High-Cost Shipment Outliers for one-off oversize consignments. (5) If none of (1) to (4) explain it, query the Business Account billing line items for the affected day to identify the surcharge or zone change.
Why does my Royal Mail avg cost differ from my Click & Drop bill?
The card is shipment-cost-at-label-print; the bill is end-of-month invoice. Differences come from: (1) post-sortation reclassification (Royal Mail under-paid surcharges added at sortation), (2) end-of-month volume rebates and goodwill adjustments not pushed back to shipment-level, (3) credits for returned-to-sender consignments where the sender did not pay full tariff. Reconcile against the official monthly statement for finance purposes; use the card for unit-economics monitoring.
How do I plan for Q4 / Christmas peak?
Royal Mail does not typically apply a peak-season surcharge (unlike DPD, Yodel, or many international carriers); the avg cost stays roughly flat from a per-rate perspective during December. What changes is mix: more Special Delivery, more declared-value loading, more remote-area shipments to home addresses, and more Saturday surcharges. Expect headline avg cost to climb 5 to 12 percent through December driven entirely by mix, not rate.
My merchant runs a free-shipping threshold. How does that interact with this card?
This card measures cost-paid-to-carrier, not shipping-revenue-from-customer. A free-shipping order still costs the merchant £3.42 (or whatever the rate is) to send; that cost is just absorbed in the order margin instead of recovered from the customer. Pair this card with shopify.total_shipping (customer-paid shipping revenue) to see the true shipping P&L; the gap is the merchant’s shipping-subsidy spend.
Why is the Highlands & Islands surcharge separate from the headline?
Royal Mail charges a Highlands & Islands surcharge (£1.00 to £2.50 per consignment depending on service) for ZE, KW, IV, AB, PA postcodes plus Northern Ireland zones for some services. The card pools this surcharge into the avg cost; if your customer mix shifts north your avg cost shifts up without any rate-card change. Use Cost by Zone for the geographic split.