Teesside Freeport is a bundle of tax and customs incentives spread across twelve sites in Redcar, Hartlepool and Middlesbrough, designated in November 2021. The sites range from a former steelworks now attracting offshore wind manufacturers to ports and an airport that carry the same status with far less attention.

This piece sets out what those incentives actually offer, which of the freeport's investment figures are independently confirmed rather than self-reported and what freeport status changes and doesn't change for a business already working inside the ordinary planning and tax system. Teesworks, the freeport's largest site, carries both tax and customs status and is used throughout as the clearest example of how the incentives work in practice.

Teesside Freeport at a glance

A freeport isn't one thing. It's a bundle of two different kinds of designated land, each carrying its own incentives, and Teesside Freeport's twelve sites are split between them.

Tax sites offer relief aimed at businesses building or investing on-site. Employers get relief from Class 1 National Insurance contributions for the first 36 months of a qualifying employee's employment, on earnings up to £25,000 a year, and qualifying new properties get full business rates relief for five years.

There's no stamp duty land tax on qualifying land purchases either, and businesses can claim enhanced capital allowances and an enhanced structures and buildings allowance on new plant, machinery and construction.

Customs sites work differently, aimed at businesses moving goods rather than building factories. Importers can defer or suspend duty while goods sit inside the site, suspend import VAT and avoid duty entirely on goods that are re-exported rather than sold into the UK market.

Import declarations are simplified too, and planning processes are streamlined compared with a standard port or logistics site.

The two designations aren't interchangeable and a business only gets the relief that matches the site it's actually on. Teesworks, for example, carries both tax and customs status, which is part of why it's the freeport's most sought-after location.

Teesside Freeport's designated land runs from Redcar to Hartlepool. The twelve sites are Teesworks, which spans separate West and East zones, Wilton International, Wilton Centre, Wilton Engineering, LV Logistics and Liberty Steel Hartlepool as tax and customs sites, alongside Teesport, the Port of Hartlepool, the Port of Middlesbrough, ABLE Seaton Port, Redcar Bulk Terminal and Teesside International Airport.

Teesworks is by far the largest and most prominent, the former SSI steelworks site now billed as Europe's largest brownfield regeneration project. It covers around 4,500 acres in total.

Only part of that, close to 1,000 acres, actually sits inside the freeport's tax and customs site boundary. The rest is being remediated and developed under the wider Teesworks masterplan without carrying freeport status itself.

Teesworks is run by Teesworks Limited, a joint venture between the public and private sectors. South Tees Development Corporation, the mayoral development corporation that owns the underlying land, originally held 50% of the joint venture alongside Teesside property developers Chris Musgrave and Martin Corney.

That changed in November 2021, when the development corporation's stake fell to 10% and Musgrave and Corney's combined stake rose to 90%. The private partners put no direct cash into the project.

They had received close to £45m in dividends and payments by the time an independent review examined the arrangement. Ben Houchen called for that review himself in 2023.

A panel led by Lancashire County Council chief executive Angie Ridgwell, alongside Richard Paver and Quentin Baker, reported in January 2024. It found no evidence of corruption or illegality.

It was still critical of governance, citing weak combined authority oversight of the development corporation's board, Freedom of Information refusals the panel called weak and private partners occasionally sitting in on confidential board discussions it called "wholly inappropriate." It made 28 recommendations on governance, transparency and financial oversight.

The most recent development came on 1 August 2026, when Tees Valley Combined Authority's cabinet converted £421m of informal lending to South Tees Development Corporation into a formal position. The authority remains under a government Best Value Notice, a formal intervention applied when a council or authority's governance falls short, first issued in April 2025 and remains in place as of August 2026.

Houchen has described the 1 August move as adding clarity to the authority's finances. None of this is part of the freeport designation itself. Tax and customs relief is a separate legal status, though Teesworks carries both that status and this governance history.

The freeport's own material cites a long list of tenants and investment figures. Two of the largest are independently confirmed.

SeAH Wind's monopile factory at Teesworks, manufacturing steel foundations for offshore wind turbines, represents £900m of investment and 750 jobs, confirmed by Tees Valley Combined Authority's own announcement and by the BBC at the time the deal was struck.

Net Zero Teesside, the BP-led carbon capture and power project backed by government financial support, represents £4bn of investment, confirmed across independent energy-sector and regional press coverage. Its own account puts the project at 4,000 jobs, a figure not independently confirmed here.

Beyond those two, the freeport's site map cites a further run of named investments, including Blastr, Green Lithium, Tees Valley Lithium, SABIC and a Southside Development scheme, each with its own investment and jobs figures. These figures come from the freeport's own account of its tenants and are not independently verified here.

Freeport status is an incentive, not a substitute for the normal rules a development would otherwise face. Every project on a tax or customs site still needs full planning permission from the relevant local authority.

The environmental regulation applying to a former industrial site like Teesworks, much of which relates to decades of contamination, is unaffected by freeport status.

The tax and customs reliefs only apply within the specific designated boundaries, not across an entire site's wider footprint. That's the practical reason the Teesworks acreage distinction above matters. A business building on the 4,500-acre wider site but outside the roughly 1,000-acre freeport boundary doesn't get freeport relief at all.

The reliefs are also time-limited rather than permanent. National Insurance relief runs for 36 months per qualifying employee. Business rates relief runs for five years per qualifying property. Neither lasts for the life of a business locating there.

Separately, the wider window during which a business can first start claiming either relief has been extended and now runs until September 2031. That's a claims deadline, not the length of the relief itself.

Freeport status doesn't itself create jobs or investment, it lowers the cost of a business choosing to invest. Whether that investment happens, and at what scale, is a separate question from whether the incentive exists.

The clearest open question on the incentive side is how much of the freeport's remaining designated land attracts qualifying investment. Teesworks continues to develop around its anchor tenants, but the freeport's other eleven sites, ports, logistics land and the airport, carry far less public information about take-up than Teesworks itself, four years into the designation.

Separately, Tees Valley Combined Authority's Best Value Notice remains in place with no removal date set, and whether the 1 August 2026 debt formalisation moves that forward is still to be seen.

Add up only the independently confirmed investment, SeAH Wind's £900m and Net Zero Teesside's £4bn, and close to £5bn has been confirmed across the freeport. Whether the freeport's longer list of claimed investment adds a comparable amount on top remains unconfirmed.

What is Teesside Freeport? One of England's original eight freeports, designated in November 2021. It covers twelve tax and customs sites across Teesside, offering tax and customs incentives to businesses that invest or trade there.

What tax breaks does it offer? On tax sites, 36 months of employer National Insurance relief per qualifying employee, five years of business rates relief on qualifying properties, no stamp duty land tax and enhanced capital allowances. On customs sites, duty deferral and suspension, import VAT suspension and simplified import processes. Businesses have until September 2031 to first claim either relief.

Who owns Teesworks? Teesworks Limited is the joint venture that runs the site, 90% owned by property developers Chris Musgrave and Martin Corney and 10% owned by the public sector's South Tees Development Corporation, down from an original 50% public stake before a November 2021 ownership transfer.

Has there been controversy over how Teesworks is run? An independent review, reporting in January 2024, found no evidence of corruption or illegality, but it criticised the site's governance and transparency and made 28 recommendations. Tees Valley Combined Authority remains under a government Best Value Notice first issued in April 2025, and formalised £421m of lending to South Tees Development Corporation on 1 August 2026.

How big is Teesworks? The wider site covers around 4,500 acres. Only part of that, close to 1,000 acres, actually carries the freeport's tax and customs designation.

How much has actually been invested at Teesside Freeport? SeAH Wind's £900m monopile factory and Net Zero Teesside's £4bn carbon capture project are both independently confirmed. A longer list of further named investments, and Net Zero Teesside's own claimed jobs figure, comes from project and freeport material that hasn't all been independently checked.