Every year, the week before Christmas, Royal Mail publishes a list of last posting dates for each service, and every year, sellers discover it roughly a day too late. The dates tell you the final day you can hand a parcel over and have it arrive before Christmas, and they're earlier than most people assume, because the network runs at peak volume and delivery takes longer than the quiet months.
This is the guide to how those dates work, roughly when each one lands, and how to make sure you're not the one apologising to a customer on Christmas Eve.
What last posting dates actually are
A last posting date is the deadline for handing a parcel to Royal Mail and having it arrive before Christmas Day. Each service has its own date, with faster services cutting off later. 2nd Class and economy services close first, then 1st Class and Tracked 48, then Tracked 24, with Special Delivery running right up to the final days. The slower the service, the earlier you have to send.
Why the dates move earlier at Christmas
The network handles roughly double its normal volume in December, and delivery aims stretch as a result. A parcel that takes two days in June might take three or four in mid-December. Royal Mail builds that slowdown into the deadlines, which is why the 2nd Class last posting date is often a week or more before Christmas, not two days before.
The rough order of the deadlines
Without pinning exact dates, which change year to year, the pattern is reliable. Economy and international services cut off first, several weeks out. 2nd Class and Tracked 48 follow. 1st Class and Tracked 24 sit closer to Christmas, and Special Delivery runs almost to the wire. If you only remember one thing, it's that cheaper equals earlier.
Where to find the official dates
Royal Mail publishes the confirmed dates on its website each year, usually in November, and they're also pushed into Click & Drop so you see a warning as the deadline approaches. Don't rely on a screenshot from a previous year, because the dates genuinely shift. Check the live list in early December and write the relevant dates on the wall.
How to plan your dispatch around them
Work backwards from the deadlines rather than forwards from your sales. If Tracked 48 cuts off on a Monday, everything sold the previous Friday that was promised for Christmas needs to go on that service or faster. A simple rule is to default to tracked services in December and reserve the cheaper untracked options for orders that don't carry a Christmas promise.
Setting customer expectations
The deadline is your problem, but the delivery promise is the customer's expectation, so the two have to line up. If your listing promises Christmas delivery, cut off that promise a day before the actual last posting date to give yourself margin, and say so clearly on the product page. A customer who knows the cutoff is far less likely to be angry than one who finds out the hard way.
The label and volume problem
December is also when dispatch volume spikes, which is when a label printer that jams or runs out becomes a genuine bottleneck. Printing a clean barcode first time matters more at peak, because a failed scan in a busy depot means a parcel that misses the deadline through no fault of the customer. Our bulk printing guide covers getting through the volume without it biting you.
What happens if you miss the deadline
Miss it and the parcel still goes, it just arrives after Christmas. For most non-gift orders that's fine, but for a customer who bought a present it's a problem, and it's cheaper to be upfront than to deal with the complaint after. The honest move is to message any customer whose order will miss the date and offer a refund or a faster alternative before they have to ask.
International Christmas deadlines
If you send gifts abroad, the international deadlines are dramatically earlier, often by several weeks, because customs and the destination postal service both slow down at Christmas. The US and EU dates are worth checking separately, and the earlier you send the less likely a parcel is to sit in a customs backlog over the holidays.
Frequently asked questions
When are Royal Mail's Christmas last posting dates published? Usually in November, with the confirmed list on Royal Mail's website and warnings built into Click & Drop as each deadline approaches.
Which service has the latest Christmas deadline? Special Delivery runs closest to Christmas, followed by Tracked 24 and 1st Class, with 2nd Class and economy services cutting off earliest.
Do international parcels have earlier Christmas deadlines? Yes, international last posting dates are weeks earlier because of customs and the destination country's own Christmas slowdown.
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