debt sustainability
Debt sustainability is a country's ability to keep borrowing, repaying and still growing without choking on interest payments or begging for rescue.
In plain English
Aunty Nkechi runs a provisions shop in Onitsha, and every Sunday evening she sits with her small notebook working out what she owes her suppliers versus what her shop actually makes that week. If she borrows ₦200,000 to restock and the shop earns enough to pay it back with room to breathe, she sleeps well. If she keeps borrowing just to pay last month's loan, with nothing left for rent or her children's school fees, everybody in the family can feel that something is wrong, even before she says a word.
A country works the same way, just with more zeroes and more grammar. Debt sustainability asks a simple question underneath all the economics jargon: can Nigeria keep borrowing and repaying without the debt eating up the money meant for roads, hospitals and salaries.
It is not really about how much a country owes in raw figures. A country can owe a lot and still be fine, as long as its economy grows fast enough and earns enough foreign exchange to service that debt comfortably. The trouble starts when debt servicing, meaning the interest and repayments, starts swallowing a huge chunk of government revenue, leaving little for anything else.
Nigeria's finance ministry has spoken about debt service taking up a large share of national revenue in recent years, which worried economists because it meant less money for capital projects. Contrast that with the United Kingdom, which carries a debt load bigger than its entire yearly income, yet investors still trust it to repay because its economy is large, stable and its currency is respected globally. Scale and trust matter as much as the size of the number.
For someone in London sending money home to Lagos, this might feel distant, but it is not. A country's debt sustainability affects how stable the naira is, how high inflation runs, and whether government projects that touch ordinary lives, like power supply or subsidised transport, keep going or get cut.
Nigeria's total public debt was reported at around ₦121 trillion in 2024. What worried analysts was more than that figure but the fact that a large share of government revenue was going straight into debt servicing, meaning less money was left for building schools, roads and hospitals.
Questions people ask
Is it bad for a country to borrow money at all?
No, borrowing is normal and even healthy when it funds things like roads, power and hospitals that help the economy grow enough to repay the loan comfortably. The problem is borrowing to survive today with no plan for tomorrow.
How do economists know if a country's debt is sustainable?
They look at ratios like debt to GDP and how much of government revenue goes into debt servicing, rather than the raw amount owed. A country with strong, growing income can carry more debt safely than one with weak revenue.
How does this affect ordinary Nigerians day to day?
When debt servicing swallows too much revenue, there is less money for subsidies, infrastructure and public services, which often shows up as higher prices, weaker naira, or slower project completion that touches everyday life.
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