Every date between now and January that changes what your parcels cost

September 2026 · 7 min read · Angler Fulfilment

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Most sellers meet peak season as a single event: it gets busy in November, it calms down in January. The cost side does not work like that. Between now and the second week of January, four separate charges change, on four different dates, and only one of them is announced loudly enough that you are likely to notice.

None of this is a forecast. Every date below is already set. What follows is the calendar, what each line does to a real monthly parcel count, and the five things worth doing before the first of them lands.

The calendar

The 5 October rise is the one with real detail behind it, and we have written it up separately: what changes on 5 October, for stamps, accounts and franking. The short form is that account customers were widely reported as unaffected, and they are not.

What it adds up to on a real month

Take a seller sending 500 parcels a month, all Royal Mail 48, all under 2kg. The October rise alone is 15p a parcel on that service.

Then add the peak surcharge from 2 November, which is a second charge sitting on top of those prices for ten weeks. That is the figure most sellers cannot put a number to, and there is a reason for it.

The number nobody publishes

Royal Mail does not publish a single peak surcharge that applies to every account. The rate sits inside your own contract. That means the only figure worth planning against is the one your account manager confirms in writing, and the worst time to find it out is on the December invoice.

If you send on a Royal Mail account, the useful thing to do this week is short: email your account manager, ask for the peak surcharge rate that will apply to your account between 2 November and 10 January, and ask whether it applies to every service you use or only some. Keep the reply.

What moved the other way this year

It is worth saying plainly, because it cuts against the direction of everything above: Amazon's fees came down in 2026, and if you sell items under £20 the change was not small.

• FBA fulfilment fees for parcels in the UK fell by an average of £0.26 from 15 December 2025.
• Clothing and accessories referral fees fell from 8% to 5% for items at and up to £15, and from 15% to 10% for items between £15 and £20, on the same date.
• Low-price FBA rates were extended to products priced at or below £20 in most categories from 5 January 2026, cutting fees by an average of £0.40 a unit.

Read those against the postage lines above and the point becomes practical rather than academic. For a sub-£20 product, the gap between sending it yourself and letting Amazon fulfil it moved in Amazon's favour this year, while the cost of sending it yourself moved up. That does not mean FBA wins: storage through Q4, removals, returns handling and prep requirements all sit on the other side of the ledger, and they are exactly the costs that bite in January. It does mean the comparison you ran last year is out of date, and Q4 is the wrong time to discover that.

Five things worth doing in the next two weeks

• Get your peak surcharge rate in writing from your carrier account manager, for domestic and international separately.
• Re-run your postage cost per order at October prices, not at the prices in your spreadsheet from the summer.
• Re-check FBA against self-fulfilment for anything under £20, because the fee side changed in January and most sellers have not re-run it since.
• Decide your last order dates now and write them on the storefront, working backwards from the carrier's posting date, your own dispatch cut-off and one working day of margin.
• Check what your prices assume. If free delivery over a threshold made sense at summer postage, it may not survive both the October rise and a surcharge on top.

The peak plan itself, month by month, is a longer subject and we have written that up too: peak season starts in September, not November.

Where we sit on all of this

We put our own peak surcharge on the rate card rather than in the contract, at 20p per order in November and December, because the alternative is what we are describing above: a charge you cannot plan against until it appears on an invoice. Our full rate card is published, including that line.

The postage rises themselves we cannot make disappear for anyone. What a fulfilment partner can do is buy at account rates, keep the cut-off steady through December, and tell you what a peak order costs before the season rather than after it.

Q4 2026 costs, answered

Does the 5 October 2026 Royal Mail increase affect account prices, or only stamps?

Both. Stamp prices for parcels rise, and Royal Mail 24 and Royal Mail 48 account prices rise on the same day, by 15p on a parcel up to 2kg on the 48 hour service and 30p on the 24 hour service. Mailmark franking prices are the only ones that do not move.

When exactly does the Royal Mail peak surcharge run in 2026?

From 2 November 2026 to 10 January 2027 inclusive, for business account customers, covering domestic parcels and international products. It is separate from the 5 October price rise and it sits on top of it.

How much is the Royal Mail peak surcharge per parcel?

Royal Mail does not publish one figure for every account. The amount sits in your own contract, so the only reliable number is the one your account manager gives you in writing. Ask for it before November rather than reading it off an invoice in December.

Does Angler charge a peak surcharge?

Yes, 20p per order in November and December, and it is on the published rate card rather than in the small print. It is shown on every quote, so the number agreed in September is the number that applies in December.

When are the Christmas last posting dates published?

Royal Mail publishes them on its own Christmas page closer to the season. Rather than wait, work backwards: take the posting date for the service you use, subtract your own dispatch cut-off, and subtract one working day of margin. That gives the last order date to put on your storefront.