Key takeaways
- Most standard courier services accept single parcels up to roughly 25–30kg; beyond that you’re into freight or pallet territory.
- Couriers charge on actual or volumetric weight – whichever is greater. Big light boxes often cost more than small heavy ones.
- Pack to survive handling: heavy parcels are lifted, slid and stacked, so double-walled boxes and reinforced seams matter.
- “From” prices online are retail one-off rates – account rates through a courier partner are usually lower for regular senders.
Sending a heavy parcel costs more than sending a light one – but how much more depends on factors many senders only discover at the checkout: weight bands, parcel dimensions and service level. This guide covers how to pack and send heavy items safely, what they cost to ship within the UK and internationally, and the volumetric-weight rule that most often catches people out.
What counts as a heavy parcel?
| Weight band | What it means | Best approach |
| Up to ~20kg | Standard parcel territory | Most couriers and Royal Mail services accept it |
| 20–30kg | Heavy parcel – upper limit for many courier services | Courier services with heavy-parcel options; check per-parcel limits |
| Over 30kg | Beyond standard single-parcel services | Split into multiple parcels, or use freight/pallet services – ask us for options |
The rule that decides your price: volumetric weight
Couriers don’t just weigh your parcel – they measure it. Your price is based on the greater of actual weight and volumetric weight, typically calculated as length × width × height (in cm) ÷ 5,000 (the divisor varies by carrier and service).
Worked example
A box measuring 60 × 50 × 50cm weighs 8kg on the scales.
Volumetric: 60 × 50 × 50 ÷ 5,000 = 30kg.
You pay the 30kg rate, not the 8kg rate – nearly four times the “weight” you expected. Snug packaging isn’t just tidier; it’s cheaper.
How to send heavy parcels: four steps
1. Choose your packaging
Strong, durable materials are essential: double-walled corrugated boxes for most items, wooden crates or heavy-duty containers for the extremes. Cushion contents with bubble wrap or foam, and reinforce seams, corners and edges with proper packing tape or strapping – heavy parcels get lifted, slid and stacked in transit. (Full guidance: how to package a parcel.)
2. Weigh and measure it
Weigh the packed parcel and measure its dimensions – both determine the price (see volumetric weight above). If you don’t own scales, courier websites’ quote calculators will estimate from your figures; round up rather than down, because under-declared parcels get re-weighed, surcharged and delayed.
3. Choose your courier
Compare options on the services you actually need: delivery speed, collection vs drop-off, tracking, insurance limits for heavier items, and reviews from other senders. Popular choices for heavy parcels include DPD, DHL and Royal Mail – indicative prices below – and a courier partner account typically beats the retail rates shown.
4. Consider parcel insurance
Heavy often means valuable – and heavier items can suffer bigger knocks. Check what cover is included and what your item needs: our shipping insurance guide explains when it’s worth it.
Heavy-parcel packing checklist
☐ Double-walled (or stronger) box rated for the weight
☐ Contents cushioned and immobile – no rattle when shaken gently
☐ Seams, corners and edges reinforced with packing tape or strapping
☐ Weight marked clearly on the box (“Heavy – 25kg”) for safe handling
☐ Old labels and barcodes removed; new label flat on the largest face
☐ Weighed and measured after packing – volumetric weight checked
Heavy parcel shipping costs
Size, weight and distance drive the cost: heavier, larger and further all mean more. The tables below show indicative retail “from” prices for popular services – *[verify all figures against current rate cards before publishing; prices last checked: ____]* – your actual price depends on dimensions, destination and service level, so always get a live quote.
UK delivery (indicative)
| Carrier & service | Typical range (5–25kg) | Notes |
| DPD – drop-off services | from ~£5–11 | Cheapest via shop drop-off; collection costs more |
| DPD – next day collection | from ~£9–21 | 12pm options at a premium |
| DHL – service point to service point | from ~£6 | Up to 15kg band |
| DHL – door-to-door collection | from ~£13–23 | 20kg and 25kg bands available |
| Royal Mail – Tracked 24/48 | from ~£5–12 | Up to 20kg; guaranteed next-day costs more |
International delivery (indicative)
| Carrier & route | Typical range (5–20kg) | Notes |
| Royal Mail – Europe | from ~£18–110 | Service availability varies by weight; over 2kg most routes use parcel services rather than International Tracked & Signed |
| Royal Mail – rest of world | from ~£39–135 | Customs declaration required |
| DHL – Europe | from ~£36–42 | Express network; fast transit |
| DHL – rest of world | from ~£59–100 | Next-business-day options to major cities |
Two cost-savers worth knowing: drop-off beats collection on price for one-off sends, and account rates beat retail rates for anyone shipping regularly – often substantially. For the wider picture, see our guides to parcel costs and e-commerce shipping costs.
Ship heavy parcels with Impact Express
At Impact Express we offer standard and express options for heavy parcels across the UK and to international destinations. As a DHL Authorised Service Partner, our account rates are consistently competitive with – and for regular senders usually better than – the retail prices above, with end-to-end tracking, customs paperwork handled, and trained staff for awkward, fragile or dangerous-goods items.
Get an online quote today – it takes a minute, and it’s priced on your actual parcel rather than a “from” headline.
FAQs
What’s the cheapest way to send a heavy parcel in the UK?
Usually a courier drop-off service rather than collection, with snug packaging to keep volumetric weight down. Regular senders save more again with account rates – compare with a quote.
What’s the maximum weight couriers will take?
Most standard services cap single parcels around 25–30kg (Royal Mail tops out at 20kg on most services). Heavier items mean splitting the consignment or moving to freight/pallet services.
What is volumetric weight?
A size-based weight: length × width × height (cm) ÷ a carrier divisor (commonly 5,000). You’re charged on whichever is greater – actual or volumetric – so large light boxes cost more than their scale weight suggests.
Do heavy international parcels need customs paperwork?
Yes – all parcels leaving the UK need customs declarations, and accuracy matters for avoiding delays. A good courier’s booking process generates the paperwork for you.
How do I send something over 30kg?
Split it into multiple parcels where practical, or use a freight or pallet service. Get in touch and we’ll recommend the right option for the item.
