Ask a casual observer of Lagos infrastructure whether the Fourth Mainland Bridge will simply toll like Third Mainland eventually does, and the honest answer exposes a common misread: Third Mainland has never charged a toll in its history, while the Fourth Mainland Bridge has been explicitly designed around toll revenue from the outset, through three separate financing structures, none of which has reached financial close in nearly two decades of trying. As of mid-2026, despite a preferred bidder named back in December 2022, construction on the ₦844 billion-to-$2.5 billion project still had not commenced.
⭐ The Fourth Mainland Bridge has been structured around toll recovery through three distinct financing attempts since 2006: a pure private consortium model in 2016, a Chinese-contractor PPP model from 2022 seeking a sovereign guarantee, and an Afreximbank-linked multi-project financing package announced in 2023. None has reached financial close, and construction had not started as of mid-2026. ⭐
For a US investor evaluating Nigerian infrastructure exposure, the pattern across these three attempts is more informative than any single one in isolation. For context on how the crossing this bridge is meant to relieve is actually priced today, see Lekki Toll Fare vs Third Mainland Bridge: Real 2026 Costs, since Third Mainland's toll-free status is the baseline every Fourth Mainland financing model has had to design around.
Model 1: The 2016 pure-private consortium (terminated 2017)
In May 2016, then-Governor Akinwunmi Ambode signed a Memorandum of Understanding with a consortium including the Africa Finance Corporation, Access Bank, Julius Berger Nigeria, Nigerian Westminster Dredging and Marine, J.P. Morgan, Hi-Tech Construction, Eldorado Nigeria, and Visible Assets Limited. The structure called for ₦844 billion in fully private financing, recovered through three toll plazas over a 40-year concession, with the bridge handed back to Lagos State at the end of that term. Lagos State cancelled the arrangement in May 2017, citing the consortium's delay in commencing construction. This model's core weakness was straightforward: private capital was expected to bear both construction and demand risk on a first-of-its-kind, multi-billion-naira greenfield asset, with no government backstop, and the consortium apparently could not mobilise on that basis.
Model 2: The 2022 Chinese-contractor PPP seeking a sovereign guarantee (stalled)
Following a competitive process that drew 52 initial expressions of interest, Lagos State named the CCECC-CRCCIG consortium, comprising China Civil Engineering Construction Corporation and China Railway Construction Investment Group, as preferred bidder in December 2022. This iteration priced the project at roughly $2.5 billion, again structured as a Design, Build, Finance, Operate, Maintain and Transfer PPP with three toll plazas and a 40-year concession, with construction meant to start in early 2023 for a 2026-2027 completion. It did not start. Reporting through 2025 and into 2026 pointed to a specific obstacle: Chinese lenders reportedly wanted a sovereign guarantee from Nigeria's Federal Government before committing capital, a request the Federal Government has been reluctant to grant, given the sub-national scale and risk profile involved. An industry consultant quoted in coverage of the stall made the underlying bankability problem explicit: a 40-year concession term is unusually long even for bridge PPPs, which typically run 20 to 25 years, meaning the revenue stream lenders are being asked to rely on looks less secure than comparable projects elsewhere.
Model 3: The 2023 Afreximbank-linked package (folded into a broader deal, unclear standalone progress)
In 2023, Lagos State signed a $1.352 billion financing partnership with the African Export-Import Bank and Access Bank, explicitly naming the Fourth Mainland Bridge alongside the Blue Line's second phase and the Omu Creek project as beneficiaries. This model differs from the first two in an important way: it is a multi-project state financing package rather than a single-asset concession, meaning the bridge does not have its own dedicated, ring-fenced funding line within it. As of the project's most recent public cost tracking in 2026, only ₦220.7 million had been spent, a figure barely large enough to cover preparatory studies on a multi-billion-dollar bridge, suggesting this package has not yet translated into meaningful construction financing for the bridge specifically.
Three models, one comparison table
| Model | Year | Structure | Toll recovery mechanism | Concession tenor | Outcome |
|---|---|---|---|---|---|
| Private consortium MoU | 2016 | Fully private DBFOMT | Three toll plazas, private demand risk | 40 years | Terminated 2017 over construction delay |
| CCECC-CRCCIG PPP | 2022 | PPP, sovereign guarantee sought | Three toll plazas, guarantee-backed debt service | 40 years | Stalled; construction not started as of mid-2026 |
| Afreximbank/Access Bank package | 2023 | Multi-project state financing facility | Not bridge-specific; folded into wider portfolio | Not disclosed for this asset | ₦220.7 million spent by 2026; unclear standalone progress |
Why the toll-recovery question keeps stalling the whole project
Every one of these models has depended on the same underlying bet: that three toll plazas on a new 37-to-38-kilometre bridge can generate enough revenue over the concession term to repay construction costs that have themselves nearly tripled in dollar terms across the project's history, from an initial ₦844 billion naira estimate in 2016 to roughly $2.5 billion by 2022. That escalation reflects both genuine cost inflation and the naira's substantial depreciation over the same period, which raises the effective local-currency cost of servicing any dollar-denominated debt used to build it. A lender assessing that revenue stream also has to weigh Nigeria's own recent precedent: analysts explaining Chinese lenders' hesitation have pointed to the political and financial difficulties that affected the Lekki-Epe Expressway's own toll concession, including sustained public opposition to tolling, as a cautionary comparison for any new Lagos toll asset.
What to check before treating Fourth Mainland Bridge as an investable toll asset
- Whether a specific model has reached financial close, meaning binding loan and equity agreements are signed, rather than a preferred-bidder announcement or an MoU, both of which have previously collapsed
- Whether a sovereign guarantee has actually been granted by Nigeria's Federal Government, since this is the specific sticking point reported for the current PPP structure
- Whether the concession tenor on any revived structure has been shortened toward the 20-to-25-year range industry consultants consider more standard for bridge PPPs, since a shorter tenor generally signals a more bankable revenue projection
- Whether construction has physically commenced, given the project's history of announced start dates, including 2017, 2019, and 2023, that were not met
- Whether toll opposition dynamics similar to those affecting the Lekki-Epe Expressway concession have been addressed in the current structure's public communication strategy
For a look at how Lagos has financed a different kind of large infrastructure project under similar funding pressure, see How FAAN Actually Funds Lagos Airport Expansion in 2026, which covers a comparable financing-structure question on a different asset class entirely.
The global comparison worth making
Long-tenor, revenue-risk bridge concessions have worked elsewhere when paired with credible traffic guarantees or minimum revenue floors, structures that shift some demand risk back to government in exchange for lower financing costs. Istanbul's Osman Gazi Bridge, for example, was financed with a build-operate-transfer structure backed by a minimum traffic guarantee from the Turkish government, which reassured lenders even though actual traffic initially ran below projections. The Fourth Mainland Bridge's current impasse, a Chinese consortium wanting a sovereign guarantee that Nigeria's Federal Government has so far declined, is functionally the same negotiation many emerging-market toll bridges have had to resolve before reaching financial close. The difference is that Lagos has now gone through two full financing attempts without resolving it once.
Frequently asked questions
Has construction started on the Fourth Mainland Bridge? No. As of mid-2026, despite a preferred bidder named in December 2022, only ₦220.7 million had been spent on the project, and construction had not commenced.
Why is China Eximbank reluctant to fund the Fourth Mainland Bridge? Reported industry analysis points to a request for a sovereign guarantee from Nigeria's Federal Government, which has not been granted, combined with concerns that the project's 40-year concession tenor is unusually long for a bridge PPP, making the projected revenue stream look less secure to lenders.
How much does the Fourth Mainland Bridge actually cost? Estimates have varied significantly over time: ₦844 billion under the 2016 financing attempt, and approximately $2.5 billion under the 2022 structure, an escalation reflecting both construction cost inflation and naira depreciation over the intervening years.
Will the Fourth Mainland Bridge definitely be tolled? Every financing model proposed for the bridge, from 2016 through 2022, has included three toll plazas as the primary revenue-recovery mechanism, so tolling is a consistent feature of the project's design, even though the project itself has not yet reached construction.
What is the difference between the Fourth Mainland Bridge's toll model and Third Mainland Bridge? Third Mainland Bridge has never been tolled since opening in 1990 and was built as a fully government-funded asset. The Fourth Mainland Bridge has been structured from the outset as a toll-recovery PPP, a fundamentally different financing philosophy for what would otherwise appear to be a similar type of crossing.
What to watch next
The clearest near-term signal will be whether the Federal Government moves on the sovereign guarantee request before the end of Governor Sanwo-Olu's tenure in 2027, a deadline several Lagos commentators have flagged as the political pressure point most likely to force a resolution, one way or the other, on the current CCECC-CRCCIG structure.
This is general infrastructure-financing analysis, not investment advice. Given the project's twenty-year history of stalled financing attempts, anyone evaluating a specific position tied to this bridge should treat every announced timeline with independent verification and consult a licensed financial or legal professional before committing capital.
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