IN Brief:
- The MPA says the tax burden on UK construction materials producers has risen by up to 29% in four years.
- Sales of aggregates, ready-mixed concrete, asphalt, and mortar have all weakened sharply across the supply chain.
- The warning lands as government housing and infrastructure ambitions depend on domestic mineral product capacity.
The Mineral Products Association has warned that rising tax costs are putting new pressure on the producers that sit at the base of the construction supply chain, at a point when demand across several core product lines is already weak. According to the association, the tax burden on UK construction materials producers has risen by as much as 29% in four years, driven by changes including higher National Insurance contributions and business rates.
The warning would carry weight in any cycle, but it lands at a particularly awkward moment. Government housing targets remain large, transport and energy infrastructure programmes are still expected to move forward, and the decarbonisation agenda continues to demand capital-intensive upgrades across heavy industry. Yet the producers expected to supply aggregates, asphalt, cement, mortar, and ready-mixed concrete are entering that period with weaker volumes and a harder investment case. The MPA says demand has been soft enough to push sales of several mineral products to record or near-record lows.
This is more than a complaint about headline tax policy. Mineral products businesses tend to operate on long investment horizons. Quarries, kilns, asphalt plants, concrete networks, fixed assets, reserves, transport fleets, and permitting all depend on confidence that future output will justify present spending. If costs are rising at the same time as housebuilding slows, commercial development stays selective, and parts of the civils market remain uneven, investment decisions are pushed back. That can show up not only in delayed expansion but also in slower plant replacement, slower decarbonisation, and tighter regional supply positions.
The MPA’s intervention also underlines the scale of the sector behind the headline. The association represents producers covering all UK cement and lime production, most aggregates output, most asphalt production, and a substantial share of ready-mixed concrete and precast concrete. It says members employ around 89,000 people. Those numbers matter because the industry is not a niche upstream segment. It is one of the essential domestic manufacturing bases that construction depends on day after day, whether the work is housing, roads, concrete frames, data centres, utilities, or major transport schemes.
There is also a policy contradiction beginning to sharpen. Construction is being asked to deliver more homes, more grid reinforcement, more low-carbon infrastructure, and more retrofit, while the materials base is being asked to absorb a growing stack of tax, energy, and compliance costs. In Scotland, the introduction of the devolved Scottish Aggregates Tax in April 2026 adds another change to the fiscal backdrop. None of that removes the need for environmental reform or proper taxation, but it does raise a practical delivery question: how much cost and uncertainty can be piled onto essential materials production before the ability to invest becomes the next bottleneck?
That tension is particularly acute because mineral products are not easily substituted at scale. Recycling and circularity are growing in importance, and rightly so, but they do not eliminate the need for primary materials across every part of the market. Concrete, asphalt, aggregates, and mortar remain fundamental to most forms of new-build and infrastructure delivery. If domestic producers hold back on capacity, reserve development, transport investment, or process upgrades, the effects can flow through to lead times, pricing, and resilience well beyond the quarry gate.
The second half of the story is therefore about timing. The sector is being asked to invest for a construction recovery that remains uneven and for a decarbonisation pathway that requires major spending before all commercial returns are clear. Producers can absorb some policy pressure, but not indefinitely. The more government ambitions for housing and infrastructure harden into actual programmes, the more this part of the supply chain will need stable conditions rather than another round of cost escalation. The MPA’s message is straightforward enough: a country cannot talk seriously about building more while making it harder to invest in the materials that make building possible.
