The UK Plastic Packaging Tax: a packaging buyer's guide

The tax falls on plastic packaging components manufactured in or imported into the United Kingdom, and it is charged by weight — per tonne of plastic. A component stops being chargeable once it carries at least a set minimum proportion of recycled plastic, although it can still count towards the tonnage that obliges a business to register.

Three numbers define the regime: the rate per tonne, the minimum recycled-content percentage, and the tonnage that triggers registration. All three are set by HMRC and all three are subject to change. Do not take them from a supplier's brochure, or from an article like this one — check the current figures on GOV.UK before you budget.

What does not change is the base. The tax is calculated on weight. Whatever the rate turns out to be this year, your exposure is the tonnes of plastic packaging you put onto the market — which is the grams on each pallet, multiplied by the pallets you ship.

The liability sits with the business that manufactures or imports the packaging component. For most buyers of pallet wrap that is the film manufacturer, not you. It is why the tax drops out of packaging reviews: nobody in the warehouse files a return, so it looks like somebody else's problem.

It is not. A charge levied per tonne on film is a cost inside the price of the roll, whether or not it appears as a line on the invoice. If your business imports goods that arrive already wrapped, the packaging around them raises its own questions. Ask your accountant where you sit, ask your supplier whether the tax is stated separately, and remember that the lever you control is the same either way: how much plastic leaves your site on a pallet.

The first is recycled content. A packaging component above the recycled threshold stops being chargeable, and for some formats that is straightforward. For a stretch film it is a real engineering constraint: the film has to stretch a long way, cling to itself, survive a sharp corner, then hold a tonne of product still for three days in a lorry. Recycled polymer changes how it behaves, and the evidence trail behind the percentage sits with the manufacturer, not with you.

The second is weight. Because the charge is per tonne, buying fewer tonnes lowers the base directly, whatever the rate is and whatever the recycled percentage is set to next. It needs no certificate and no supply-chain audit. And it does something the recycled route does not: it cuts what you spend on film, on machine time, and on the waste you pay to have taken away.

Toreto ran its own wrap test in August 2026 — one pallet, one machine, the same power stretch and tension settings on every run, with the film cut off and weighed afterwards. Solid 23µ film held the load at 9.9 kg/sq in and weighed 200 g. Supersonic and Aerosonic at 16µ held 10 kg/sq in and weighed 66 g, because the reinforced films needed around half the revolutions to get there.

These are Toreto's own measurements rather than estimates, and the money attached to them varies with film price and pallet size. But weights are weights, and the tax is charged on weight. The arithmetic that follows is simple: an operation wrapping 20,000 pallets a month puts roughly 48 tonnes of film a year onto its pallets at 200 g each, and about 16 tonnes at 66 g.

That is the shape of the decision. Not a marginal saving negotiated off the roll price — two thirds of the tonnage removed, at slightly better holding than before. Across a normal mix of loads the reduction runs at 40–50%; here it was wider. The film changed; the machine, the tension settings and the pallet did not.

The instinct when a plastic tax lands is to down-gauge. The same wrap test shows where that stops working. Solid film at 23µ, 20µ and 17µ held the load at exactly 9.9 kg/sq in in all three runs. The extra microns bought weight — 200 g, 174 g and 140 g — and no extra containment at all. On that evidence, thinning a solid film genuinely does reduce tonnage.

Push further and it reverses. A 12µ nano film held only 7.6 kg/sq in, the weakest result in the test, on 91 g. Nano depends on a well-set machine and fails easily when anything is off, so most users end up double-wrapping — and a doubled pallet weighs 182 g. That is more plastic than the 17µ solid film it replaced, at roughly twice the cost per pallet.

Down-gauging reduces tonnage only for as long as the wrap still holds. From the moment the operator adds revolutions to compensate, the tax base climbs back and the damage bill climbs with it. The reduction that survives contact with the loading bay comes from structure — reinforcement that holds without the extra turns — not from a thinner roll.

Start with your own number, because nobody can hand it to you. Cut the film off a finished pallet and weigh it. Multiply by the pallets you shipped last year. That is your tonnage of pallet wrap, and every conversation about this tax hangs off it.

Then take it to the supplier. Ask what the film weighs on your pallet, not what the roll costs. Ask what recycled content it carries and how that is evidenced. Ask whether the tax is shown separately on the invoice. Ask what happens to the weight if you move to a film that needs fewer revolutions — and ask for it to be proved on your own pallets, on your own machine, with the film weighed off both.

Then check the current rate, the recycled-content threshold and the registration threshold with HMRC, and set your own tonnage against them. The rate will change again, and the thresholds may move with it. The tonnes on your own pallets are the part you can do something about.