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How PostEx shipping charges are calculated

PostEx prices on a different model from most direct couriers in Pakistan, and merchants who apply a sector mindset to a PostEx invoice will generate disputes that do not hold up.

Zones, not sectors

Where a sector model reads the origin–destination pair directly, PostEx cards typically work in two stages. Every city is first assigned a zone. The charge then depends on the relationship between the origin zone and the destination zone — whether the movement stays inside one city, stays inside one zone, or crosses into a different zone.

That two-stage design has an important implication. Your reconciliation is only as good as your city list. If a destination is not on the coverage list you hold, its zone cannot be resolved, so the expected charge cannot be computed. That line is not overcharged and it is not correct — it is unresolved, and it needs its own bucket rather than being quietly counted as clean.

How the rate card is laid out

PostEx cards are commonly presented as a grid: weight rows against zone columns. A first row covers the base weight, a second covers the next band, and a further row defines the charge for each additional increment above that.

Two features worth noting. Many PostEx cards carry no fuel surcharge component at all, unlike several other Pakistani couriers. And the card is frequently quoted exclusive of tax, with GST appearing as its own line at the applicable rate. Comparing a tax-inclusive invoice figure against a tax-exclusive card will make every line look overcharged by roughly the tax rate.

Reading a CPR

PostEx billing commonly arrives as a Cash Payment Receipt, in spreadsheet form and sometimes as a PDF carrying the same data.

The critical distinction on a CPR is between freight figures and settlement figures. The shipping charge column is what you were billed to carry the consignment — that is the number to reconcile against your rate card. The COD, deduction and net columns describe money movement back to you. They are settlement, not freight, and reconciling against them will produce nonsense.

A CPR also carries the origin city per row, which is genuinely useful — it means the lane can be resolved without assuming a default pickup point.

Where differences usually appear

• Unmapped cities. The single largest source of unresolved lines. Coverage lists change; yours may be older than the invoice.
• City name variants. "Lahore Cantt", "lahore gpo" and "Lahore City" are one city to you and three different strings to a spreadsheet. Normalise both sides before matching.
• Order reference mismatches. Invoice references sometimes drop the # that Shopify order names carry. Strip it from both sides before joining.
• Tax basis. Covered above, and worth checking first because it affects every line at once.

Checking a PostEx invoice yourself

Work from the shipping charge column, resolve each lane through your zone list, and compute the expected figure from your own card. The volumetric weight calculator handles the chargeable-weight step, and the full method is in our guide to reconciling courier shipping charges in Pakistan.

Common questions