The cheapest carrier depends entirely on where the parcel's going, its dimensions, and its weight. A parcel locker is great for a compact box but useless for a guitar. A postal service rules for small packets, but couriers win when things get heavy.
Here's a breakdown of the three variables that control cost, and a quick cheat sheet for picking the right carrier.
The 3 variables that control cost
- Destination: Domestic shipments give you budget choices; international ones are stricter. Remote areas add surcharges.
- Dimensions: Size can trigger locker limits, dimensional (DIM) weight, oversize fees, or manual-handling charges.
- Weight: A 2 kg lampshade often costs more to ship than an 8 kg dense box because of the space it takes up in the van.
Domestic picks by country
| Country | Carrier | Best For |
|---|---|---|
| Poland | InPost Paczkomat | Parcels under 25 kg that fit lockers. Often beats door-to-door pricing. Stick to A/B/C tiers. |
| Germany | Hermes | Small parcels. Very competitive pricing. |
| Germany | DHL | Medium domestic shipments (Paket M). Broad network, high trust. |
| UK | Evri | Small and medium non-urgent parcels. |
| UK | Royal Mail | Tracked 48 is solid for documents and small tracked parcels. |
| US | USPS | Flat Rate boxes work perfectly for dense items that fill the box. |
| US | UPS Ground | Competitive for heavier packages, especially via shipping software rates. |
International: Express vs. Economy
International shipping is where "cheap" can get expensive if things go wrong. DHL Express, FedEx, and UPS Worldwide cost more than postal economy, but they offer stronger tracking, faster customs clearance, and clearer delivery windows.
Economy works for low-margin goods, gifts, and non-urgent orders. But remember: bad customs data causes more delays than bad routing. An inaccurate description or undervalued declaration can stall a parcel for two weeks.
Dimensional weight: The hidden fee
Dimensional weight makes bulky, light parcels expensive. Carriers usually divide your box's volume (L × W × H in cm) by 5000 or 6000. They compare this DIM weight to the actual weight and charge you for the higher number.
A 60 × 40 × 30 cm box has a volume of 72,000 cm³. Divided by 5000, that's 14.4 kg. If your item weighs 4 kg, you're paying for 14.4 kg. That's why shipping a pillow or lampshade feels like a rip-off.
How to actually lower costs
- Right-size the box: Use the free 3D packing calculator to see if you can squeeze into a smaller carrier tier. This hits both size-tier costs and DIM weight.
- Consolidate smartly: Two small labels can cost more than one medium label. But don't consolidate if it pushes you into an oversized tier.
- Use lockers and aggregators: InPost or Amazon pickup points reduce failed deliveries. If you ship 50+ parcels a month, aggregators like Sendcloud or Pirate Ship often beat public carrier rates.
When cheap is a mistake
Fragile items need stronger packaging and clear claims support. Time-sensitive parcels need a solid delivery promise. High-value parcels need insurance and signature on delivery.
Use a premium service when the cost of failure is higher than the price difference. Paying for insurance without packing the item correctly won't help you—carriers will deny the claim.