Shipping costs often represent a significant share of an e-commerce business's expenses. Whether you ship a few orders per month or several thousand, every parcel can eat into your margins if your logistics choices are not properly optimised.
The good news is that there are practical, proven strategies to reduce shipping costs while maintaining an excellent customer experience.
In this article, we review what really works for small, medium and large shipping volumes. You'll discover concrete tips and key metrics to track in order to keep your shipping costs under control.
Small volumes (under 250 parcels/month)
Even with low shipping volumes, a few mistakes can be costly. Small e-commerce businesses need simple solutions that are quick to implement, without complex negotiations.
1. Choose the right carrier at the time of shipment
Quickly comparing carriers based on price, delivery times and delivery options (home delivery, pick-up points) allows you to select the most suitable solution for each parcel. The right choice can reduce costs, prevent returns and improve customer satisfaction.
National carriers: reliable for local and regional deliveries, with short lead times and competitive pricing. Easier to contact in case of issues (delays, lost parcels).
International carriers: essential for selling abroad, with expertise in customs formalities and services adapted to each country (fast delivery, accurate tracking).
Practical tip: even with just 20 parcels per month, having at least one national carrier and one international carrier allows you to compare and choose the best option for each order.
2. Optimise parcel size and weight
Shipping costs depend not only on actual weight, but also on volumetric (DIM) weight. Carriers charge based on whichever is higher: the actual weight or the weight calculated from the parcel's volume. In other words, a light but bulky parcel can cost far more than expected.
What you can do:
- Standardise 2 to 3 packaging formats for all your products to limit variation and avoid excess volume.
- Shrink the box rather than fill it. Padding does not reduce volumetric weight, which is worked out from the box's outside dimensions: only a smaller box does. The EU PPWR regulation points the same way, since it counts padding as empty space.
- Check dimensions before shipping to anticipate volumetric weight and avoid extra charges.
Example: A 500g product shipped in a 30×30×30 cm box may be billed at a much higher equivalent weight, whereas the same product in a 25×20×10 cm box will be far cheaper to ship. The exact difference depends on the carrier and destination, but the logic is always the same: the larger the box relative to the product, the higher the cost.
This simple optimisation is often one of the fastest ways to reduce shipping costs, especially as volumes start to grow.
3. Limit address and customs documentation errors
Even at low volumes, an incorrect address or an incorrectly completed HS code can lead to:
- returns
- additional fees
- customs holds for international shipments
For a parcel shipped to the United States, an incomplete HS code (6 or 8 digits) may be considered insufficiently precise and trigger an inspection or a hold. Using the correct 10-digit code from the start makes customs clearance smoother and avoids unexpected costs.
4. Favour pick-up points
Pick-up point deliveries are generally cheaper than home delivery and reduce failed deliveries. Even with just 20 parcels per month, this option can generate meaningful savings if you track the right indicators.
5. Ask for rates before you think you have the volume
Many merchants wait until they have "enough volume" before picking up the phone. That is almost always too late, because there is no official threshold. Every carrier sets its own, it moves with the season and with your destinations, and it is often lower than you would guess.
Asking commits you to nothing and costs one conversation. The right reflex is to approach several carriers rather than one: at equal volume, the gap between operators is the real surprise, and comparing two or three offers is how you find out where you actually stand.
What to ask for, in what order, and what a discount actually covers: that is the subject of our guide to negotiating carrier rates.
Medium volumes (250 to 3,000 parcels/month)
With higher volumes, savings become more visible. It's no longer enough to check each parcel individually: you need to structure your flows and automate certain tasks.
1. Compare and segment carriers
Identify each carrier's strengths: small parcels, express, international. Smart allocation of parcels based on cost and delivery time helps optimise margins.
2. Standardise packaging and processes
Reducing the number of formats lowers DIM weight, speeds up preparation and reduces errors. Three to five formats usually cover the large majority of orders.
3. Monitor additional costs
Beyond the listed price per parcel, you need to anticipate:
- address correction fees
- returns or non-standard parcels
- customs errors for international shipments
4. Widen what you negotiate
Even medium volumes can justify adjustments:
- weight-band pricing
- conditions for frequent destinations
- discounts on specific services
Watch what the discount you obtain actually covers: it almost always applies to the base rate and leaves surcharges at list price. The detail is in negotiating carrier rates.
5. Automate documentation and tracking
- Automatic generation of invoices and customs documents
- Tracking of addresses, weights, HS codes and declared values
- Parcel tracking to quickly detect anomalies and resolve incidents before they escalate
Concrete example: a merchant shipping 1,500 parcels a month through a single carrier pays that carrier's rate on lanes where it is not the best. Segmenting by destination, automating label creation and clearing incidents faster act on three separate lines: the rate, the time spent, and the cost of shipments that go wrong. How much you gain depends entirely on how scattered your destinations are and on your incident rate, two figures only you know.
High volumes (3,000+ parcels/month)
For large e-commerce businesses, every euro counts and every process can have a major impact. A data-driven, strategic approach is essential.
1. Fine-grained flow segmentation
Geographical zones, product types, expected delivery times.
Smart routing = lower costs + increased reliability.
2. Full control of carrier contracts
- Structural discounts, surcharge conditions, SLA penalties.
- Continuous optimisation based on product mix and destinations.
3. Optimise logistics and packaging
- Industrial standardisation of formats
- Fewer and tighter box formats rather than more padding: volumetric weight is worked out from the box's outside dimensions
- Full automation of picking, packing and shipping label printing
4. Anticipate returns and errors
- Automatic validation of addresses and customs data before dispatch
- Real-time incident detection and resolution
- Regular analysis of return rates by carrier and destination
5. Leverage your volume
At this scale, volume is your strongest negotiating tool. Use it:
- to obtain structural discounts on your main lanes
- to negotiate SLA penalties with carriers
- to access priority services reserved for high-volume shippers
How ParcelRush helps you reduce shipping costs
Compare DHL and UPS rates in real time, automate your customs documents and track your costs per carrier from a single dashboard. No subscription, from €0.29 per label.
Further reading:
- Choosing the Right Carrier for Your E-commerce Business, key criteria and common mistakes
- Optimise Your E-commerce Shipping with an All-in-One Solution, centralise and automate
- How Smarter Returns Boost E-Commerce Conversions, reduce the hidden costs of returns
- E-commerce Shipping Trends: The Key Logistics Levers, concrete actions for every business size
- Offering free shipping without losing money, the break-even and the amount to display in your store
- European e-commerce market data decoded for independent stores, consumer behaviour signals that affect your logistics choices
Track your shipping costs with ParcelRush. Full visibility by carrier and destination.
Frequently asked questions
What is DIM weight and why does it matter for e-commerce costs?
DIM weight (dimensional weight) is calculated from your parcel's dimensions: length × width × height, divided by a carrier-specific factor. If the DIM weight is higher than the actual weight, that is what you get billed. A light but bulky parcel can cost significantly more than expected. Standardising 2 to 3 packaging formats and using snug-fitting boxes is one of the fastest ways to reduce costs.
When can I start negotiating carrier rates?
There is no official threshold, and that is good news: the volume at which a carrier will open the conversation varies by operator, by season and by destination. The only reliable way to know where you stand is to ask, and asking commits you to nothing. What you can put on the table in any case is weight-band pricing, conditions on your most frequent destinations, and discounts on specific services. Until you have a grid of your own, comparing rates in real time at the moment of shipment remains the most effective lever.
Does offering pick-up points reduce my shipping costs?
Yes, in two ways. Pick-up point delivery is typically cheaper per parcel than home delivery. And because the parcel waits for the customer rather than the other way round, failed delivery attempts and the re-delivery fees that follow drop significantly.
How can I reduce international shipping costs?
Three practical levers: use the correct HS code from the start (10-digit for the US, 8-digit for most EU destinations) to avoid customs holds and extra fees; declare the accurate value to prevent delays; and register for IOSS if you sell goods into the EU from outside, to simplify customs clearance and remove the surprise VAT charge at the customer's door.
Maëlle Lemarchand CEO of ParcelRush. 15 years in web, UI/UX and e-commerce. Writes about shipping, logistics, e-commerce and marketing. LinkedIn
