Switching logistics provider is not an IT project: it is a warehouse move carried out while your sales keep running. Done at the right moment, nobody notices — not your customers, not your marketplaces. Done in November, you spend your peak answering "where is my order" tickets.
This article gives you the real timeline, the Belgian contract clauses to re-read before you serve notice — including one almost nobody reads that can freeze your stock — the six points where a migration breaks, and what the move actually costs.
One date, because it governs everything else: Black Friday 2026 falls on Friday 27 November, Cyber Monday on Monday the 30th. Everything below is counted backwards from there.
The short answer: eight weeks, and the window closes in early September
A clean migration takes about eight weeks between the decision and the last order shipped by the old warehouse. Transport is not what consumes that time: two trucks are enough to move the stock of a mid-sized shop. What consumes it is the joint stock count, the product-data clean-up, per-channel testing, and the period when both warehouses coexist.
Add one rule that is not negotiable: your new provider must have handled three to four weeks of normal volume before your peak. A warehouse discovering your SKUs on 20 November will discover them badly.
| Milestone | 2026 deadline | Why that date |
|---|---|---|
| Decision made, notice served | Week of 7 September | Last possible start for a full eight weeks |
| Stock physically transferred | Week of 19 October | Leaves one buffer week before cutover |
| Full cutover | Monday 26 October | 100% of orders on the new warehouse |
| Run-in at real volume | 26 October → 20 November | Four weeks to fix things before peak |
| Operational freeze | From 20 November | No further changes until mid-January |
If you are reading this after mid-September, the right call is not to rush: it is to prepare the migration now and cut over in January. January is the best window of the year: low volumes, year-end returns already absorbed, and twelve full months ahead of you on the new rate card. A rushed late-October move costs more than a quarter of patience.
Five signals that you should switch — and two that say stay
Being unhappy is not enough of a reason. These five signals, however, almost never get fixed without changing operator:
- The picking error rate has stopped moving. You have raised it in writing three times over three months and the curve is flat. A provider who can fix it fixes it within six weeks.
- Your invoice is no longer readable. "Exceptional handling", "fuel surcharge" and "specific processing" lines weigh more than the signed rate card, and nobody can tell you which order they attach to.
- The contractual cut-off is no longer the real cut-off. Your carrier hand-over scans land after the truck has left. You are selling a promise the warehouse no longer keeps, and you take the review for it.
- You pay a monthly minimum you never reach — or, the other way round, you have outgrown the top tier and the provider refuses to reopen the rate card.
- Your new channel is not supported. You open a marketplace, B2B pallet flows or one more country, and the answer is "we don't do that". A channel blocked by logistics costs more every month than the migration does once.
Two situations, on the other hand, where switching will make your problem worse:
- The root cause is your data, not your warehouse. Missing EANs, wrong weights and dimensions, phantom bundles: you will carry all of it with you, and the new warehouse will reproduce exactly the same errors. Clean first, then migrate.
- You are less than eight weeks from your peak. The cost of a bad season always exceeds the cost of one more quarter with a mediocre provider.
Before you serve notice: four clauses to re-read, one of them specifically Belgian
Sequence matters. You re-read the contract, then you sign elsewhere, then you notify. The reverse puts you in a weak position at the exact moment your stock sits in someone else's building.
1. Notice period and automatic renewal
Belgian logistics contracts most often run on three months' notice with tacit year-on-year renewal. Two classic traps: notice must leave before the anniversary date (not before the end date), and the required form is often registered mail. An email to your account manager does not start the clock.
Look for the minimum volume clause too. If your contract guarantees a number of orders or pallets, unworked notice is usually billed at the contractual minimum, not at your real volume.
2. Right of retention and pledge: the clause that can freeze your stock
This is the point most guides skip, because it is specific to Belgian practice — and it is the one that turns a negotiated exit into a standoff.
Most Belgian logistics providers refer, in their terms, to the General Belgian Forwarding Conditions (Conditions Générales Belges d'Expédition / Algemene Belgische Expeditievoorwaarden). The 2005 version was published in the Annexes to the Belgian Official Gazette of 24 June 2005 under number 05090237, and a revised 2024 version has since been issued by the sector federation. On this particular point, both say the same thing.
What those conditions give your provider:
- A privilege over all goods, documents and amounts it holds, grounded in article 14 of the Act of 5 May 1872 on commercial pledge, article 20.7° of the Mortgage Act and article 136 of the General Act on Customs and Excise.
- A right of retention over those goods, together with the right to sell them to cover its claim.
- A deliberately broad scope: the claim may relate, wholly or partly, to goods other than those being retained. A disputed invoice from March can therefore block the stock sitting there in October.
- A pledge that applies even if you are not the owner of the goods. That is decisive if you hold consignment stock or goods belonging to a supplier.
The practical consequence fits in one sentence: never leave with an invoice in dispute. If an amount is contested, pay it and contest afterwards, or formally escrow it — but do not let your stock stand as security while you argue. And get written confirmation of release before you send the truck: "no amount being due, no right of retention will be exercised over the goods collected on [date]."
Finally, check which version your contract points to — 2005 or 2024. That is not a detail: it is the first question your counsel will ask if the exit goes wrong. This describes a common contractual mechanism, not legal advice; for an actual dispute, have your contract reviewed.
3. Exit fees and the final invoice
Look for lines named "stock-out", "exit fee", "release for collection" or "preparation for pick-up". They are billed per pallet, sometimes per unit, and on a fast-moving catalogue, per-unit billing can exceed the cost of the truck itself.
These fees are the only genuinely negotiable item, and they can only be negotiated once: when you sign the incoming contract, never on the way out. If you are signing with a new provider today, cap your future exit fees now. It is the cheapest clause to obtain and the most expensive one to lack.
4. The deadline to claim afterwards
The same sector conditions impose short deadlines, and they start running when you are busiest. In the 2005 version: a reasoned written claim within 14 days of delivery or dispatch of the goods, and liability actions time-barred after 6 months. Jurisdiction is also assigned to the court where the provider has its registered office.
Operationally: if you find a stock discrepancy, you cannot wait for the January accounting close to raise it. Count on receipt, write within 14 days.
The backwards plan, week by week
Eight weeks of preparation, two of consolidation. The dates in the third column assume a cutover on Monday 26 October 2026; shift them as a block for any other target.
| Week | What you do | 2026 dates |
|---|---|---|
| W-8 | Contract review (notice, retention, exit fees). Notice served in the required form. Quantified brief: volumes, SKUs, weights, destinations, peaks. | 7 → 11 Sep |
| W-7 | Consult two or three candidates. Demand an all-in price per order, not a list of services to add up. | 14 → 18 Sep |
| W-6 | Data clean-up: EANs, real weights and dimensions, photos, kits and bundles. This is the week people skip and pay for later. | 21 → 25 Sep |
| W-5 | Contract signed, account opened, stock transport booked. Future exit fees capped in the new contract. | 28 Sep → 2 Oct |
| W-4 | Technical connection in sandbox: store, marketplaces, carriers, returns portal. Test orders on every channel. | 5 → 9 Oct |
| W-3 | Freeze inbound replenishment to the old warehouse. Joint stock count, SKU by SKU, countersigned. | 12 → 16 Oct |
| W-2 | Physical transfer in waves: fast movers first, long tail after. Receipt and counting on arrival. | 19 → 23 Oct |
| W-1 | Cutover. Stock zeroed on the old connector before the new one opens. Return address updated everywhere. | 26 → 30 Oct |
| W+1 | Handle straddling returns, reconcile discrepancies, file a written claim if needed. | 2 → 6 Nov |
| W+2 | Close the outgoing account, settle the final invoice, confirm release in writing. | 9 → 13 Nov |
That leaves two weeks of margin before 27 November. They are not a luxury: they exist to fix whatever the run-in has revealed.
The six points where a migration breaks
None of these is theoretical. In order of frequency, these are the ones that produce incidents your customers can see.
1. The stock discrepancy
Your theoretical stock and what actually goes into the truck never match perfectly. On a catalogue of a few hundred SKUs, a 1–3% gap is ordinary; beyond that, there is a cause. The only moment you have leverage is before the pallets leave, with a countersigned joint count. Afterwards you are inside the claim deadline described above, and the burden of proof is yours.
2. Stock in transit and open orders
A container arriving during the cutover is the most expensive scenario: it turns up at a warehouse that no longer expects it, or at one that has not set up the SKUs yet. Shift your supplier receipts by three weeks either side of the cutover, or have them delivered straight to the new provider with an explicit receiving order.
3. Two versions of the truth on stock
This is the number one cause of overselling during a migration. Two warehouses connected to the same channel for forty-eight hours, and you sell the same unit twice. The rule is absolute: zero the old connector before opening the new one, never the reverse. A few hours showing out-of-stock costs infinitely less than a wave of cancellations on a marketplace, where they are paid for in seller defect rate. If you sell across several channels, our guide to multi-channel logistics covers the sync mechanics.
4. Return labels already out in the wild
Every parcel shipped in the six weeks before cutover potentially contains a prepaid label pointing at the old address. Those returns will keep arriving for weeks. Agree explicitly, in writing, who receives them, who forwards them and who pays that second leg. It belongs in the exit agreement, not in a question asked in December. It also touches your returns portal: if it is hosted by the outgoing provider, it dies with the contract.
5. Carrier accounts
Two cases. If carrier contracts are in the provider's name, you lose its negotiated rates the day you leave: compare the new offer on the shipping line, not only on pick and pack. If they are in your name, access, account numbers and pickup settings all need transferring. Count ten working days on the carrier side, and start in W-4, not W-1.
6. The product master data
EANs, real weights, dimensions, packing rules, kits, batch numbers and expiry dates for food, ADR classification for batteries and aerosols. A new warehouse applies your data literally, without the habit-based corrections the old one made. If your products fall under the food chain or dangerous goods, verify those constraints before signing: see our AFSCA and ADR pages.
What switching provider actually costs
Stock transport is the item everyone talks about, and rarely the heaviest. Here is the full structure.
| Item | What triggers it | How to reduce it |
|---|---|---|
| Unworked notice | You leave before the notice period ends, often billed at the contractual minimum | Align the cutover with the end of notice, or negotiate a lump-sum settlement |
| Exit fees | Stock-out billed per pallet or per unit | Negotiated on the way in, not on the way out |
| Inter-warehouse transport | Pallet count and distance | Palletise densely, group the long tail into a single wave |
| Receiving at the new site | Billed per pallet or per counting hour | Arrive with a clean SKU file: counting goes twice as fast |
| Overlap | Two warehouses billed for two to six weeks | Shorten the window, not the preparation |
| Stock discrepancy | Found afterwards, outside the claim deadline | Countersigned joint count before departure |
| Internal time | Four to eight weeks of one or two people | The item nobody costs, and often the largest |
The useful order of magnitude: for a shop shipping a few hundred to a few thousand orders a month, the one-off cost of a migration typically equals one to three months of logistics invoicing. It pays back in six to twelve months if the new rate card is genuinely lower or the error rate drops. It never pays back if you are switching over a few cents per order — at that gap, stay and renegotiate.
To run that calculation on your own case you need a comparable base: an all-in price per shipped order, not a sum of line items. That is the principle behind our public rate card, and it is also the question to put to every candidate.
Cutover day: the checklist
- Confirm in writing, to both providers, the exact time of the old warehouse's final cut-off.
- Zero the stock on the old connector. Verify the update on every channel before going further.
- Activate the new connector. Place a real order on each channel — store, marketplace, B2B — and follow it through to the carrier scan.
- Update the sender and return address everywhere: terms and conditions, contact page, returns portal, transactional email templates, marketplace listings, prepaid labels.
- Brief your customer service with a three-week transition script and a list of orders that may straddle the two sites.
- Keep the outgoing account open for thirty days for returns still in transit.
- At D+7, compare on-time shipping across both periods. If the rate has dropped, you have one week to fix it before it shows up in reviews.
The most common mistakes
- Migrating in November. The only case where it is justified: your current provider is already in default. Otherwise, January.
- Trusting theoretical stock. Count it, countersign it, photograph the disputed pallets.
- Serving notice before signing elsewhere. You end up with a firm exit date and nowhere to go.
- Leaving an invoice in dispute. See the right of retention: that is what turns an €800 disagreement into frozen stock.
- Forgetting B2B. Reseller flows have their own labelling, delivery windows and paperwork. They break silently, and you hear about it from the end customer.
In short
Switching logistics provider is an eight-week operation, not an end-of-month arbitrage. Three things make it work: a contract re-read before notice is served, a joint stock count before the pallets leave, and a cutover that leaves at least a month of run-in before your peak. In 2026 that means deciding in the first half of September — or aiming for January, which remains the best window of the year.
We operate from Willebroek, with no minimum volume and no subscription, a public rate card and a 3 p.m. cut-off. If you are considering a move, send us your volumes, your SKU count and your destinations: within 4 working hours you get a real quote, a comparison with your current cost and a dated migration plan. If migrating is not worth it for you this year, we will tell you so. Let's talk.
FAQ
How long does it take to switch logistics provider?
About eight weeks between the decision and the last order shipped by the old warehouse, plus two weeks of consolidation. Transporting the stock only takes a few days; the rest is product-data clean-up, the joint stock count, per-channel testing and the overlap period. A three-week migration is possible, but you pay for it in stock discrepancies and overselling.
Can you switch 3PL in peak season, just before Black Friday?
It is not advisable. Black Friday 2026 falls on 27 November: to be safe, your new warehouse should have been handling your normal volume for at least three to four weeks, which means cutting over by late October at the latest, so deciding in early September. After mid-September, prepare the migration and cut over in January — low volumes, returns absorbed, a full year ahead of you.
Can my old provider hold my stock?
Yes, if you owe it money. Most Belgian providers refer to the General Belgian Forwarding Conditions, which grant them a privilege, a right of retention and a pledge over the goods they hold — including for a claim relating to other goods, and even if you are not the owner of the stock. Hence the rule: pay first, contest afterwards, and obtain written confirmation of release before sending the truck.
What notice period applies to a logistics contract in Belgium?
There is no single statutory duration: your contract governs. In practice, three months with automatic annual renewal is the most common setup. Check three things: the date from which notice runs, the required form (often registered mail) and whether a minimum volume exists, since that determines what you pay on unworked notice.
How much does switching logistics provider cost?
The one-off cost typically equals one to three months of logistics invoicing, spread across seven items: unworked notice, exit fees, inter-warehouse transport, receiving at the new provider, billing overlap, stock discrepancies and internal time. It amortises in six to twelve months if the new rate card is genuinely lower. For a gap of a few cents per order, migrating is not worth it.
How do you avoid overselling during the cutover?
By never having two warehouses live on the same channel. Zero the stock on the old connector, verify propagation on every channel, and only then open the new one. A few hours showing out-of-stock costs less than a run of marketplace cancellations, which durably damage your seller score.
What happens to returns and labels already sent out?
Prepaid labels inside parcels shipped before the cutover keep pointing at the old address for several weeks. Have the exit agreement state who receives them, who forwards them and who pays that second leg. Also settle the fate of the returns portal: if the outgoing provider hosts it, it stops working when the contract ends.
Sources
General Belgian Forwarding Conditions — 2005 version published in the Annexes to the Belgian Official Gazette of 24 June 2005 under no. 05090237 (articles 33, 34, 36, 37 and 38), revised in 2024 by Forward Belgium. Legal basis of the privilege: article 14 of the Act of 5 May 1872 on commercial pledge, article 20.7° of the Mortgage Act, article 136 of the General Act on Customs and Excise. Commercial dates: Black Friday on Friday 27 November 2026, Cyber Monday on Monday 30 November 2026.
Written by the Yaslan team, e-commerce logistics provider in Willebroek. The timings and orders of magnitude given here come from migrations we run on the receiving side; they do not replace having your contract reviewed by legal counsel.