“Any person involved ‘in any capacity’ with the commercial exploitation of taxable aggregate” will be treated as an involved third party from 1 April, under an order made on 20 January 2026. The change brings Scottish aggregates tax into Revenue Scotland’s third‑party inspection regime, allowing officers to visit business premises and check documents where necessary under section 142 of the Revenue Scotland and Tax Powers Act 2014. (legislation.gov.uk)

Formally laid before the Scottish Parliament on 22 January and signed by Minister Ivan McKee, the instrument takes effect on 1 April 2026. It amends the 2015 Involved Third Party Order to specify that Scottish aggregates tax is a relevant devolved tax for inspections and that documents about the commercial exploitation of aggregate are relevant documents.

Commercial exploitation is defined in the Aggregates Tax and Devolved Taxes Administration (Scotland) Act 2024. In broad terms it covers removing aggregate from a site, its supply to another person, its use for construction, or mixing it with other materials, while setting out exceptions for movements between registered sites and certain processes. The tax itself is charged when aggregate is subjected to commercial exploitation in Scotland, with Revenue Scotland responsible for collecting it. (legislation.gov.uk)

For northern firms, the cross‑border detail matters. Revenue Scotland says businesses based in England, Wales or Northern Ireland that sell aggregate to Scottish customers may be affected, alongside quarry operators and intermediaries such as merchants and contractors. That brings suppliers in Cumbria and Northumberland squarely into scope where the material is exploited in Scotland. (revenue.scot)

Inspection powers are not unlimited, but they are practical. Officers can enter business premises of involved third parties to inspect the premises, business assets and relevant documents where they have grounds to believe checks are required. Inspections are usually by agreement or with seven days’ notice, though they can proceed without notice if giving notice would seriously prejudice tax collection, and ‘premises’ can include land or a vehicle. (legislation.gov.uk)

For quarry operators, asphalt and concrete producers, merchants and civil contractors working near the Border, this means record‑keeping needs to be tight. Contracts, weighbridge tickets, delivery notes and evidence for any reliefs or exemptions should clearly show where and when aggregate is first exploited, and who is responsible at that point, because anyone ‘in any capacity’ in that chain could be the involved third party whose site is inspected.

The Scottish Government has trailed a proposed rate of £2.16 per tonne for 2026–27, with the final figure set each year through the Scottish Budget. Until go‑live, the UK‑wide Aggregates Levy continues to apply in Scotland. (gov.scot)

The Act also makes clear when exploitation is treated as occurring in Scotland: broadly, when the aggregate is in Scotland at the point of exploitation, or where removal or supply happens as a result of material being moved into Scotland from the rest of the UK. Liability rests with the person responsible for the exploitation. (legislation.gov.uk)

With the inspection framework now extended to cover aggregates tax, the message for northern SMEs is straightforward: map any flows into Scotland, confirm whether you need to register with Revenue Scotland, and be organised if an inspection notice lands. The tax goes live on 1 April 2026 and will be collected and managed by Revenue Scotland. (legislation.gov.uk)