Introduction

The Central Bank of Nigeria's latest research confirms that persistent budget deficits are a primary driver of naira depreciation, using annual data from 1981 to 2024 and a Vector Autoregressive framework to isolate fiscal impacts on exchange rate dynamics.

What Happened

Analysis shows budget deficits account for a substantial share of immediate exchange rate fluctuations and contribute to sustained currency depreciation. The study also found that fiscal shortfalls exert delayed upward pressure on interest rates and paradoxically contract the money supply, reflecting defensive monetary tightening. Notably, no statistically significant direct link was found between budget deficits and inflation, suggesting price levels are shaped more by supply-side shocks and exchange rate pass-through than fiscal policy alone. These dynamics point to fiscal dominance, where government borrowing and spending pressures undermine exchange rate stability and limit the central bank's policy autonomy.

Why This Matters

With Nigeria's 2026 budget initially proposing a N23.85 trillion deficit and later revised upward to N29.20 trillion, the study's findings arrive at a critical juncture. The results highlight the risk of ongoing fiscal imbalances crowding out private investment and intensifying currency pressure, particularly as the CBN navigates tightening cycles and rate adjustments. Policy makers are urged to strengthen fiscal‑monetary coordination, establish binding deficit limits, and implement structural reforms to protect investment and stabilize the naira.

Key Takeaways

  • Budget deficits are a main driver of exchange rate weakness, with immediate and sustained effects.
  • No direct causal link was found between fiscal shortfalls and inflation, pointing to broader structural factors.
  • Deficits exert delayed upward pressure on interest rates and reduce money supply, reflecting defensive tightening.
  • Recommended reforms include binding fiscal rules, a non‑oil stabilization fund, and improved fiscal‑monetary coordination.
  • Strengthening private‑sector credit access and stabilizing inflation expectations are key to supporting long‑term economic growth.

Conclusion

The CBN study makes clear that without structural fiscal reform, continuing budget shortfalls will keep weighing on the naira. Policymakers must balance developmental spending with macroeconomic stability, making coordinated fiscal and monetary action essential for sustainable economic growth and currency resilience.