Beyond the Contract: Sovereign Tax Exemptions in Infrastructure Projects

Si serikali built the road, why is your local hardware dealer paying Value Added Tax (VAT) on cement while a foreign mega-contractor pays zero?

It is one of the most persistent frustrations in local business: domestic contractors and suppliers bidding for major infrastructure projects often find themselves priced out by foreign firms offering impossibly low quotes. The secret rarely lies in cheaper concrete or faster workers. Instead, it is written into the invisible legal plumbing of government-to-government infrastructure financing.

When Kenya borrows billions from bilateral partners to build modern railways, highways, or power plants, the transaction is not a standard commercial order. It is an international agreement between sovereign states. Embedded within these deals is a powerful financial engine: sweeping sovereign tax exemptions.

Understanding how these exemptions work, how they are written into bilateral treaties, and how they intersect with national tax laws reveals why local businesses struggle to compete on large projects and how state revenue authorities often end up fighting their own national Treasury in court.

How does government infrastructure financing work?

When a country needs to construct a multi-million-dollar highway or railway, it typically uses one of two financial avenues: commercial open-market borrowing or concessional bilateral financing directly from another government.

Commercial loans from private international markets carry high interest rates and short repayment periods, but they leave the host country free to procure contractors on the open market.

Bilateral financing, by contrast, involves a government-to-government loan or grant, often arranged through state-backed export-import institutions. These loans usually come with cheaper interest rates and longer repayment timelines, but they carry explicit conditions. Chief among them is a restricted procurement rule: the government lending the money specifies that contractors and equipment must originate from its own home country.

To protect these development funds from being absorbed back into the host nation's local budget, foreign lenders demand that every dollar, yuan, or euro provided is spent purely on physical project costs. This requirement is where sovereign tax exemptions enter the contract.

Why are tax exemptions built into bilateral agreements?

From the perspective of an international lender, charging local taxes on foreign development funding is seen as an indirect tax on foreign aid or state loans. If a government lends $100 million (about KSh 12.95 billion) to build a port, it does not want $16 million (about KSh 2.07 billion) returned directly to the host nation’s revenue authority through local VAT.

As a result, bilateral financing packages include mandatory tax exemption clauses. These provisions shield foreign primary contractors and their imported capital equipment from local levies, including:

• Import Duty: Waivers on heavy machinery, steel, and specialized technology brought into the country.
• Value Added Tax (VAT): Zero-rating or exempting project-related purchases and service billing.
• Corporate Income Tax: Special tax holidays or reduced rates on the profits generated by foreign project entities.
• Withholding Tax: Exemptions on payments transferred back to foreign parent companies or international subcontractors.

These exemptions are negotiated directly between diplomats, financial ministries, and foreign trade delegations before a single shovel touches the ground.

How do international treaties clash with local tax law?

Once diplomats sign a bilateral development agreement containing tax waivers, a legal challenge begins: international treaties must be translated into domestic tax law.

Under Kenya's legal framework, international treaties and bilateral agreements signed by the National Treasury carry constitutional weight once ratified. However, the domestic collection of taxes is governed strictly by national statutes, such as the Income Tax Act and the Value Added Tax Act, administered directly by the revenue authority.

This separation creates a systemic point of friction:

[Bilateral Treaty Signed], -> [National Treasury Approves Exemption]
|
V
[Local Tax Statutes] <, - [Revenue Authority Enforces Standard Tax Rules]

When a tax statute does not explicitly reflect every exemption written into a foreign treaty, local revenue officers are legally obligated to issue tax demands. The foreign contractor produces the bilateral treaty signed by the National Treasury, while the revenue authority points to the local tax code.

Who gains and who loses from tax waivers?

Sovereign tax exemptions create clear winners and losers across the local economy.

For an ordinary local hardware supplier or small civil engineering firm, the equation is stark. When a local contractor buys diesel or steel locally, taxes are built into the purchase price. When a foreign prime contractor imports fuel or materials under a sovereign exemption, those extra costs disappear, widening the cost gap between local and foreign businesses.

Tax exemptions scrutinized amid debt and growth

As African nations balance national debt with internal economic growth, the legal architecture of sovereign tax exemptions is coming under closer scrutiny.

Tax authorities across the region are pushing national parliaments to harmonize tax codes, ensuring that any exemption granted in an international development treaty is mirrored in national tax laws before projects begin. At the same time, domestic business associations are lobbying governments to mandate minimum local-content quotas, requiring foreign prime contractors to buy a fixed percentage of inputs from tax-paying local suppliers.

Going forward, the key metric for successful sovereign financing will not just be how quickly a project is built, but whether the legal agreements behind it leave local industries stronger or priced out of their own domestic market.