Postcodes
How Postcodes Affect Delivery Fees
Couriers and shops price delivery by zone, and zones are defined by postcode. See why remote areas cost more and how fees are worked out.
Updated 14 October 2026 · 2 min read
Delivery fees often depend on where a parcel is going, and postcodes are the quickest way for a shop or courier to express "where". Each code is mapped to a zone with its own price.
The zone idea
A carrier divides its network into zones. Some are based on distance from a depot, others on delivery difficulty. Each postcode is assigned to a zone, so the price can be looked up instantly as soon as the postcode is entered. This is also why many checkouts ask for the code before anything else.
Why remote codes cost more
Rural, island or low-density areas can involve long routes with few drops. Carriers may apply a surcharge to those postcodes, or exclude them from free-shipping offers. The cause is cost, not a penalty on the customer. See also postcodes in rural and remote areas.
Weight bands and speed
Zone is only one input. Fees also depend on parcel weight or size and on service speed. A postcode picks the row of the rate table, and weight and speed pick the column.
Free-shipping thresholds
Retailers often set rules such as "free delivery over a certain order value within these postcodes". Using postcode lists keeps the rule easy to explain and enforce. The approach is the same one used for service area checks.
When the code is wrong
A mistyped postcode may show a wrong price, or a price correction after dispatch. See common postcode mistakes for how to avoid that.
Beyond the postcode
Carriers also care about whether a vehicle can actually reach the destination: gates, access roads and loading points. A postcode does not answer these questions. An exact-location code can help a driver reach the correct entrance, and UPCS offers this as a complement to the official postcode. Read how exact-location codes complement postcodes.
Key takeaway
When comparing shops or couriers, enter the same postcode in each checkout before you decide. Because zones and surcharges are set by each company, the same parcel can cost noticeably different amounts to the same destination, and the difference is often explained by how each firm has drawn its zones.
Frequently asked questions
Why is delivery more expensive to my area?
Carriers often add charges for remote or hard-to-reach postcodes because routes there take longer or serve fewer customers.
Do two nearby postcodes always cost the same?
Not necessarily. Pricing zones are drawn by the carrier, so neighbouring postcodes can fall into different bands.