This revision short looks at some of the Micro & Macro Effects of Increased Banking Competition

Microeconomic Effects

💸 Lower Borrowing Costs: Challenger banks offer lower interest rates and fees, boosting consumer surplus and allocative efficiency. 60% of SME lending (£37.3bn of £62.1bn) came from challengers in 2024 (BBB).

🏦 Reduced Market Power: Increased contestability weakens oligopoly power of Big Four banks, encouraging productive efficiency through cost-cutting and better services.

📱 More Innovation: Digital banks drive dynamic efficiency by investing in fintech—e.g. AI credit checks, app-only services—forcing traditional banks to modernise.

Macroeconomic Effects

📈 Higher Investment & Growth: Easier SME access to finance boosts investment, raising AD in the short runand LRAS in the long run. SMEs make up 99.9% of UK firms and 61% of jobs (FSB, 2024).

🧱 Lower Systemic Risk: A more diverse banking sector reduces reliance on large banks, improving financial stability and reducing negative externalities from potential failures.

⚠️ Risk of Over-Lending: Fierce competition may lower lending standards, increasing the chance of moral hazard and requiring stronger regulatory oversight.