Anatomy of the ₦159 Trillion Trap: Why Nigeria's Debt Is No Longer a GDP Ratio Conversation

Nigeria's public debt has grown at an unprecedented pace.

Between 2021 and 2025, total public debt increased from ₦33.1 trillion to about ₦159.3 trillion, a rise of more than 380 percent. The latest borrowing approvals include a $5 billion budget support facility from First Abu Dhabi Bank and a $1 billion financing package backed by Citi Bank and UK Export Finance for the rehabilitation of Lagos Port.

These figures have renewed concerns about Nigeria's fiscal future.

The issue is no longer simply how much the country owes. The bigger concern is why the country continues to borrow and whether those loans are creating assets that can generate future income.

Nigeria is moving beyond a borrowing problem into what many economists describe as a structural debt trap.

The Mechanics of the Debt Trap

Borrowing can support economic growth when it finances productive investments.

Governments often borrow to build roads, ports, power plants, and other infrastructure that increase future revenue.

The problem begins when borrowing shifts from financing development to financing existing obligations.

Instead of creating new assets, fresh loans are increasingly used to manage old liabilities and support government spending.

This creates a cycle where debt generates more debt.

Many discussions focus on Nigeria's debt-to-GDP ratio, which remains lower than that of many advanced economies.

However, this measure tells only part of the story.

A more important indicator is the debt service-to-revenue ratio.

In recent years, debt servicing has absorbed a substantial share of government revenue, leaving limited resources for healthcare, education, infrastructure, and security.

A country may have a manageable debt-to-GDP ratio but still experience fiscal stress if government income cannot comfortably support debt repayments.

The Fiscal Responsibility Challenge

Nigeria's Fiscal Responsibility Act states that borrowing should primarily finance capital projects and human development.

The principle is straightforward.

Debt should create assets that improve future economic performance.

When borrowing increasingly supports recurrent expenditure or budget shortfalls, the long-term benefits become less clear.

Economists argue that this weakens fiscal sustainability because future taxpayers inherit larger obligations without receiving equivalent productive assets.

The debate therefore extends beyond how much Nigeria borrows to how effectively borrowed funds are used.

The Hidden Impact of Currency Devaluation

One of the biggest drivers of Nigeria's rising debt burden has not been new borrowing alone.

Exchange rate movements have played a major role.

Since 2023, the naira has depreciated sharply against the US dollar.

Because much of Nigeria's external debt is denominated in foreign currency, every depreciation automatically increases its value when converted into naira.

No additional money needs to be borrowed for this increase to occur.

The debt simply becomes more expensive in local currency terms.

This means exchange rate stability has become an important part of debt management.

Domestic Borrowing Is Creating New Pressures

Domestic debt now represents more than half of Nigeria's total public debt stock.

Much of this consists of Federal Government bonds and Treasury bills.

While domestic borrowing reduces foreign exchange risk, it creates another challenge.

Government securities often offer attractive returns.

Banks and institutional investors may therefore prefer lending to the government instead of financing private businesses.

This phenomenon is known as crowding out.

When more capital flows into government debt, businesses face higher borrowing costs and reduced access to credit.

This can slow private sector investment, innovation, and job creation.

Looking at the New Borrowing

Not every loan carries the same economic value.

The $1 billion Lagos Port rehabilitation facility has the potential to improve trade efficiency, reduce logistics costs, and increase future government revenue.

If completed successfully, such infrastructure can support long-term economic growth.

The $5 billion budget support facility presents a different picture.

Budget support helps governments meet immediate financial obligations, but it does not directly create income-generating assets.

While it may ease short-term fiscal pressure, it does little to strengthen the country's long-term productive capacity.

This distinction matters.

Borrowing for infrastructure can generate future returns.

Borrowing to finance current spending often cannot.

Breaking the Cycle

Reducing dependence on debt requires structural reforms.

Greater use of public-private partnerships can attract private investment into infrastructure without placing the full financing burden on government.

Stronger fiscal rules could also link future borrowing to revenue growth rather than spending ambitions.

Improving tax collection, reducing wasteful expenditure, and eliminating revenue leakages would strengthen public finances over time.

Most importantly, every new loan should be evaluated based on its ability to generate measurable economic returns.

Nigeria's debt challenge is no longer about headline figures alone.

The real concern is the relationship between borrowing, government revenue, and productive investment.

Debt can be a powerful tool for development when it finances assets that expand the economy.

However, when borrowing increasingly supports fiscal survival rather than asset creation, the cycle becomes harder to break.

The long-term solution is not simply borrowing less.

It is ensuring that every borrowed naira creates value that strengthens the economy and improves the country's ability to repay its obligations.