Peak Season Logistics: Prepare for the Weeks That Test Everything

For a stretch each winter, a courier and logistics operation runs far beyond its normal volumes. On December 2, 2025, DHL’s German network set a record sorting around 12.4 million shipments against 6.7 million on an ordinary day, close to double. At that load, there’s no slack left to absorb a broken handoff: data stuck between your systems becomes a parcel stuck in your network.

This guide gives you three things: a list of what tends to go wrong between Black Friday and Christmas Eve, the handful of problems you can still fix in a few weeks before peak and five questions to ask in January once the dust settles.

What peak season reveals

Every system in your dispatch operations has a breaking point, and peak is exactly when you find it. It tells you more about your IT than any audit ever will.

Say, it’s Black Friday, two in the morning. Picture the dispatch room: the system crawling, parcels stacking up, no one is certain who has the authority to switch something off. Peak rarely creates new problems. It usually drags the ones you’ve had all year into the open – every gap between your systems, every manual handoff, every workaround – right at the moment a wrong decision costs the most. The silver lining, such as it is: the audit runs itself. But it does need something from you – making sure someone writes down what it finds.

The run-up to peak comes down to one habit. If a fix isn’t already in place, don’t try to build it before peak; it goes on a list for January instead. Two labels run through this guide to keep that clear. “Before peak” covers what people and email can deliver, as the name suggests, in the pre-peak window: a process, a decision, a template. “January” means changes to the system itself, which is the work to put in front of your IT team once peak is over, not in the middle of it.

What breaks first during peak season

Peak failures follow a pattern. Oftentimes, a handful of problems recur every year in the order presented below, each giving off a signal first. Here is what to watch and what to do in the weeks before peak and what to log for your January list.

Volume comes in above forecast

A major retailer launches a promotion without warning you.

• Signal: pre-alerts from retailers rising faster than forecast. Don’t read pre-alerts as a forecast. Track, per sender, the ratio of pre-alerted to actually inducted parcels – when it drifts, your forecast is already wrong.
• Before peak: peak allocations and surcharges are agreed with your largest senders months ahead, in summer; what’s left before peak is to confirm them in writing, day by day, and settle where the overflow goes.
• January: let the TMS hold the capacity limits itself.

Sortation or line haul falls behind

Once intake outpaces throughput, the backlog compounds by the hour.

• Signal: trailers waiting at the dock and line-haul departures slipping against schedule.
• Before peak: confirm standby line-haul capacity with subcontractors and set a standing priority for express and deadline parcels.
• January: a route plan built from pre-alerts and corrected as scans come in.

A wave of “where is my parcel”

Every delay turns into tracking traffic and enough of it can take down the very system your operation runs on. Each of those delays also carries a cost most operators never add up.

• Signal: a rising number of tracking hits per shipment.
• Before peak: get ahead of it and:
  • message customers about delays before they ask,
  • brief retailers before their own customers complain,
  • put a cache in front of the public tracking page (a quick, protective change you can stand up in a week), with a short TTL – customers will see slightly stale status, which beats seeing nothing,
  • rate-limit partner API calls if the system already supports it, with the threshold and date shared beforehand.
• January: give tracking its own database to read from, separate from the operational one.

A vendor goes down or the whole TMS does

Peak outages come from more than load. Ransomware lands in this window too, because that is when a paralyzed operation is most likely to pay.

• Signal: a vendor’s response time creeping up, which shows before the outage itself does.
• Before peak: have an answer ready for each critical vendor:
  • what happens if it is down for four hours?
  • when the route optimizer fails, couriers fall back to fixed territories and set their own order, which works only if the stop list is on the phone before they leave,
  • keep a second SMS gateway,
  • every night, export stop lists and manifests outside the TMS.

A backup that is on the same network as your TMS isn’t a backup.

Lockers and pickup points fill up

This one affects operators running their own out-of-home network. For retailers and 3PLs without one, it plays out differently. Out-of-home is also your strongest lever at peak, which is what makes its capacity worth protecting.

• Signal: locker occupancy by region and the time it takes for recipients to collect their parcels.
• Before peak:
  • agree with your largest senders to default checkout to lockers and pickup points during peak. An out-of-home stop carries many times the parcels of a doorstep attempt, so shifting volume off the doorstep is your strongest lever,
  • send a morning notification and let the customer choose a point; if no reply comes after a set wait, route to the nearest free one, if the system allows it,
  • stand up temporary points only if you can switch them on by mid-November.

Shortening the collection window frees space at the cost of more returns.

People

Three staffing pressures peak all at once, on the busiest weeks of the year: seasonal hires, winter illness thinning the regulars through December and constant turnover at your subcontractors.

• Signal: stops per hour and the “not home” rate among new couriers.
• Before peak:
  • give new couriers simpler territories, a mentor and a power bank.
  • check “not home” against the phone’s recorded location (cleared with your DPO – and, where it applies, your works council) at the moment it was marked, if the app captures it. Treat a mismatch as a reason to look closer, not as proof. Use it to settle claims and guide training, never discipline, and with rules agreed with subcontractors first.
• January: store gate and entry codes in the app.

The world outside

Your peak is also everyone else’s: winter weather, fraudsters and attacks aimed at your tracking page.

• Before peak: have your message templates ready to go and announce one rule ahead of time: no extra payment request ever goes out as a link in a text, and the only place a surcharge shows up is the tracking page, after the customer enters their parcel number.

Peak doesn’t end on Christmas Eve

There’s a second wave behind the first: returns. And they arrive in early January just when the logistics operation is already worn down.

• Signal: the volume of return labels and codes being generated.
• Before peak: have a separate returns capacity plan for the opening fortnight of January.

How to prepare for peak season in final weeks

When should peak season logistics preparation actually start? At least six weeks before. But it’s not enough to rebuild anything, so don’t try. Use the time to put six things in place:

Put peak season freeze changes on three fronts. Your own team follows an exceptions list agreed beforehand. With vendors, you lock a window with no updates. With sales, you fix a cutoff date, beyond which a large new client is a January problem.

Write the degradation plan: what you switch off and in what order. Marketing goes first. Parcel notifications always stay on, but you can send them less often. When a shutdown reaches your retailer integrations, warn the biggest accounts before peak, not once it’s underway.

Make every signal a number, not a feeling. For instance: a scan event that reaches the system more than X minutes after it happened. Operations decides, IT executes. Write down the threshold and the decision-maker’s name ahead of time.

Keep a workaround log. Have dispatchers note every time they go around the system — the date, what they bypassed and why. It takes seconds per entry and it’s the raw material for your January review; without it, the workarounds leave no trace.

Run a single targeted test instead of a full one. Take the tracking load from the worst delay day of the last peak and multiply it by your volume growth. Then, check if customer queries aren’t landing on the same database your scans depend on. Your worst hour isn’t the high-volume one but the one when parcels fall behind.

Time your seasonal courier onboarding. How long does a seasonal hire take to go from signed contract to first scan: account, device, app, training? That figure is a real cost and most operators have no idea what theirs is.

Five questions to ask in January

Once peak is behind you, there are five questions that will tell you more than any report:

1. Who was the first to find out about the problem: the system, a dispatcher or a customer on the help line?
2. How often did people bypass the system, using Excel, the phone or a messaging app? For each workaround, pin down what was missing: a feature, the data or the training.
3. What couldn’t you change in the system when you needed to: a temporary branch, a subcontractor, a territory, a delivery window?
4. Could you switch off a single feature or did you have to take down half the system? The answer leads to an architecture decision.
5. How many stops per hour did a seasonal courier manage versus a permanent one on the same territory? That difference is knowledge your system doesn’t hold.

To those, add everything you flagged for January back in the earlier section of this article. That list, written during peak rather than reconstructed afterward becomes your genuine plan for next year and the starting point for your next round of peak season logistics preparation cycle.

Make peak season your most honest audit

When you find yourself only weeks away from peak, there’s no rebuilding your systems. It’s too late for that. Peak season logistics preparation comes down to two jobs: planning for what will break and writing down what actually does. It won’t make the operation run smoother, but that clear written record of the failures, logged as they happened, is worth more than a vague feeling that you coped.

In January, don’t ask whether you survived peak. Everyone does, one way or another. Ask how many times your people had to go around the system to make it through – a number you’ll have if your dispatchers keep a simple running log through peak: the date, what they bypassed and why. That count is the audit.

Want the number sooner? At Software Mind, we work with courier and logistics operators to turn these questions into a concrete plan for the systems underneath. Contact our experts or run your own TMS health check to start.

FAQ

When should peak season logistics preparation start?

Start at least six weeks before peak. That rules out changing your systems, but it leaves time to establish a change freeze, write a degradation plan and set the signals you’ll watch. Anything that needs a system change goes on the January list.

Why do delivery operations fail at peak and not the rest of the year?

Most of the problems were there all along. Peak just applies enough load to expose them. Fragmented systems, manual workarounds and brittle integrations start costing deliveries once volume climbs. Peak is the stress test.

What’s worth measuring once peak is over?

Count how often people worked around the system to get through, falling back on Excel, the phone or a messaging app like WhatsApp. Every workaround points to something missing – a feature, the data, the training – and the list becomes your plan for the systems work to tackle before next peak.

Is peak season over once the holidays pass?

Not quite. The post-peak returns wave forms a second peak in early January and it needs its own capacity plan for the first two weeks of the month.