How Amazon's 2026 FBA and MCF changes will affect UK sellers — and what to plan for

Amazon adjusts FBA fees and Multi-Channel Fulfilment (MCF) pricing every year, and the 2026 UK cycle continues a pattern that's now well-established: fees go up for categories Amazon wants to de-prioritise, stay roughly flat for categories Amazon wants to keep competitive, and structural rules change around what counts as a “standard” parcel vs oversized, heavy-and-bulky, dangerous goods, and low-price items.

This piece isn't a fee calculator — Amazon's own tools do that and the exact pence-per-kilo differences are published on Amazon Seller Central's fee pages. Instead, this is the operational view: what tends to shift in a UK FBA-fee adjustment, how it affects seller behaviour, and what's worth doing in your inventory and dispatch setup before the changes bite.

All specifics in this post are based on publicly available Amazon UK seller documentation at the date of publication. Amazon's fee schedules change — always verify current rates directly in Seller Central before making commercial decisions.

The pattern of the last three years

Amazon UK FBA fees have broadly trended upward since 2023, but not uniformly. The pattern across the 2023-2025 cycles, and likely continuing into 2026, has three threads:

1. Size-tier re-classification. Amazon periodically redraws the boundaries between “small envelope”, “large envelope”, “standard parcel”, “small oversized”, and “large oversized”. A parcel that was “standard” in one year's fee table can become “small oversized” after a redrawing, even though the physical box didn't change. Overnight, the FBA fee jumps materially. Sellers who haven't measured their actual parcel dimensions recently get a nasty surprise on their invoice.

2. Low-priced item penalty reductions. Amazon has progressively improved pricing for items under £10, recognising that FBA was becoming economically unviable for low-AOV sellers and pushing them to competitors. Expect this to continue — low-price FBA is a category Amazon wants to protect.

3. Removal and disposal fee creep. When you pull stock out of FBA (removals to your own warehouse, or disposal), those fees have crept up consistently. This makes ageing or slow-moving stock in FBA progressively more expensive to clear, which nudges sellers to dispose sooner rather than later.

What tends to happen to MCF

Multi-Channel Fulfilment — where Amazon ships your FBA stock to customers who bought on Shopify, eBay, TikTok Shop, Temu, your own website, etc. — has its own fee schedule, typically 30-80% higher than FBA-for-Amazon-orders. The 2023-2025 pattern:

• Branded packaging options get more attention (Amazon knows sellers don't love shipping Amazon-branded boxes to eBay buyers).
• Rate differential vs direct carrier has narrowed for small-parcel domestic — MCF is often competitive with DPD or Royal Mail on 1-3kg UK parcels now, which wasn't true in 2022.
• Next-day and same-day premiums have become more aggressively priced. MCF next-day for small parcels is often price-competitive with Royal Mail Tracked 24.

The 2026 direction looks broadly similar: MCF as a viable outsource-the-warehouse option for sellers who don't want to run their own fulfilment, competitive on small parcels, less so on bulky or heavy items where dedicated carrier contracts beat it.

Who benefits and who loses in a typical fee cycle

A rough generalisation based on the last three cycles:

Benefits:

• Sellers of low-AOV items (under £10) — continued improvements keep FBA viable.
• Sellers of truly small parcels (under 500g, small envelope) — these fees tend to stay flat or rise slowly.
• Sellers using MCF to ship to other channels from the same FBA pool — the cross-channel economics keep improving.
• High-velocity sellers where storage is a small share of total cost.

Loses:

• Sellers of mid-weight, mid-size items (1-3kg, standard parcel) — these tend to see above-inflation fee rises.
• Sellers of anything on the standard/oversized boundary — a re-classification can flip you to a higher fee tier.
• Slow-moving stock in FBA — long-term storage and removal fees keep rising.
• Dangerous goods / lithium-battery sellers — the DG fee premium keeps widening.

The honest takeaway: if your catalogue is dominated by 1-3kg standard-parcel items, sold at a £15-£30 price point, with slower turns, you're in the pressure zone. Fee changes will eat more of your margin in 2026.

The operational moves to make before fees bite

These are moves that pay off whether Amazon's 2026 changes are large or small. Do them now and you're resilient to whatever the fee schedule looks like.

1. Measure your actual parcel dimensions, not the ones on your system

If you last measured box dimensions for FBA in 2023 or earlier, measure again. Packaging changes (thinner boxes, different void fill, slightly different mailers) can push parcels over a tier boundary without anyone noticing. Your inventory platform should let you record actual post-packing dimensions and compare those to the Amazon tier boundaries.

2. Tighten your slow-mover strategy

Define a monthly view: every SKU, grouped by “90-day sell-through”. Anything below the fast-mover threshold (typical benchmark: 0.5 units/day/SKU) needs a decision — liquidate via discount, move out of FBA to your own warehouse, or dispose. The cost of not deciding is compounding storage + long-term storage fees.

A good inventory platform shows you this view automatically. Without it, slow movers quietly accrue storage fees for months before anyone notices.

3. Don't put 100% of stock in FBA

For any SKU selling across multiple channels, keeping 60-70% in FBA and 30-40% in your own warehouse (or 3PL) gives you flexibility. If Amazon's fees rise on that category, or if Amazon has a spike in MCF prices, you can pivot more of the fulfilment to your own operation without running out of stock at Amazon first.

The requirement: your inventory platform must sync across FBA and your own warehouse in real time, with per-location stock counts and the ability to route orders to the cheapest source for each channel.

4. Model MCF vs direct courier, per-order

For every non-Amazon channel order (Shopify, eBay, TikTok Shop, Temu, your own site), the fulfilment decision should be: ship from FBA via MCF, or ship from own warehouse via direct courier? The right answer varies by weight, destination, speed SLA and — for Temu specifically — whether Temu's subsidised courier rate is cheaper than MCF for that parcel.

A rate-shopping engine that includes MCF as one of the options (alongside Royal Mail, DPD, Evri, Temu courier etc.) lets you make this decision in real time rather than by default rules. On typical UK multi-channel volumes, this is 5-12% of total fulfilment spend.

5. Lock in your pricing buffer

If FBA fees go up 8% in a category and your selling price stays the same, that 8% comes straight out of margin. Build a quarterly review into your pricing process: actual FBA fee per SKU / cost of goods / shipping / margin target → updated selling price. Amazon's Buy Box algorithm rewards consistent pricing, so big one-off price jumps are punished more than small quarterly adjustments.

6. Audit dimensional-weight-sensitive SKUs

Any SKU where dimensional (volumetric) weight exceeds actual weight by more than 30% is a candidate for packaging optimisation. Smaller box, better void fill, maybe a poly mailer instead of a carton. Amazon calculates FBA fees on the higher of actual and dimensional weight — if you can cut dimensional weight by a tier, you cut FBA fee by a tier.

The big-picture argument for reducing FBA dependence

Amazon FBA is a brilliant service when your volume is growing fast, you're stabilising operations, and Amazon Prime traffic is the majority of your revenue. It's less brilliant once you're selling meaningfully across eBay, TikTok Shop, Temu, Shopify and your own site — because at that point, every pound you're paying Amazon to fulfil a non-Amazon order is a pound that isn't going into your own operational capability.

The direction most mature UK multi-channel sellers eventually move:

• Amazon orders → FBA (for Prime eligibility and Amazon algorithm benefits).
• Everything else → own warehouse or 3PL, with courier rate shopping on each parcel.
• Hybrid rules → some low-velocity Amazon SKUs fulfilled from own warehouse via FBM to reduce FBA storage costs.

Getting to that model requires an inventory platform that treats FBA as one location among several, not as the whole warehouse. If your current platform is really just “FBA with a dashboard”, fee changes will always feel like they're happening to you rather than something you can manage around.

What to watch for specifically in 2026

Without predicting specifics that Amazon hasn't announced:

• Category-specific adjustments. Fashion, beauty, home goods have all had different trajectories — expect continued divergence rather than uniform changes.
• Size-tier boundary redefinitions. These don't always get loud announcements. Watch your FBA Revenue Calculator output on your biggest SKUs whenever Amazon publishes a change.
• Low-priced FBA improvements. The under-£10 story has kept getting better; more of the same is likely.
• Removal and disposal fee rises. The squeeze on ageing inventory continues.
• Possible tightening around inbound stickering and prep fees. Amazon has been nudging sellers to do more prep themselves.

None of these will be catastrophic on their own — but cumulatively, across a year, they compound. A seller running tight operations with proper rate-shopping, a slow-mover discipline, and multi-location stock comes through each cycle fine. A seller who's treated FBA as autopilot gets a pay cut.

The two-hour exercise to do this week

1. Pull your 2025 FBA fee spend broken down by SKU. Sort by total fee paid descending.
2. For the top 20 SKUs, calculate fee-as-percent-of-selling-price.
3. Flag any SKU where that ratio is above 25% — those are the ones exposed to 2026 fee changes.
4. For each flagged SKU, write one sentence: is this a pricing problem (raise price), a packaging problem (reduce dimensional weight), a location problem (partly move out of FBA), or a catalogue problem (delist, it's not viable)?

That one exercise tends to surface 3-5 commercial decisions that can materially improve profitability without waiting for Amazon's actual 2026 change announcement.

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MaxInvent is a UK-based inventory and dispatch platform. It treats FBA as one fulfilment location among many, supports real-time rate shopping across MCF, Royal Mail, DPD, Evri and Temu courier direct, and gives sellers the slow-mover and per-SKU fee views referenced above. Book a demo or see pricing.