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    Government scraps landfill tax reforms: cost and routing impacts for project teams

    November 27, 2025|

    Reviewed by Joe Ashwell

    Government scraps landfill tax reforms: cost and routing impacts for project teams

    First reported on The Construction Index

    30 Second Briefing

    Government has scrapped plans to abolish the reduced rate of landfill tax, dropping proposals that would have raised charges on non-contaminated construction spoil from £4 to £126 per tonne by 2030, a move house-builders said would add about £15,000 per home and £1.26bn to London projects plus £437m to HS2. Instead, the standard rate will track RPI and the lower rate will rise by the same cash amount, preserving the gap, while the tax exemption for quarry backfilling is retained. Industry bodies warn that, despite avoiding the steep hike, higher lower-rate uplifts (forecast to raise £420m by 2030/31) and new higher business rates for large quarries, cement and asphalt plants will still increase costs and could influence waste routing and materials strategies on major schemes.

    Technical Brief

    • Stakeholder responses warned convergence would make illegal dumping economically attractive versus compliant landfill disposal.
    • Treasury explicitly links its revised stance to protecting the target of 1.5m new homes in England.
    • Quarry backfilling remains tax-exempt, preserving a low-cost placement route for surplus excavation arisings.
    • Planned uplifts to the lower rate are forecast to generate an extra £420m by 2030/31.
    • Circularity and design-for-reuse are framed as primary strategies to mitigate future tax and compliance exposure.

    Our Take

    The jump from a £4 to £126 per tonne rate would have disproportionately hit bulk earthworks on large infrastructure such as HS2, effectively repricing cut-and-fill strategies and likely forcing more on-site re-use and value-engineered designs rather than straightforward disposal.

    An extra £1.26bn in London development costs set against a 1.5 million homes target in England signals that even modest planning or design delays could have compounded viability issues, especially for brownfield-led schemes relying on tight land and construction margins.

    The Treasury’s forecast £420m additional revenue by 2030/31 is relatively small in the context of national infrastructure budgets, which suggests that for projects and contractors the policy risk around landfill tax design can be more material than the fiscal benefit to government.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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