Lesson 9 - Purchasing Power

What purchasing power means

Purchasing power is the value of money expressed in the amount of goods or services it can buy. If prices rise but your income stays the same, your purchasing power falls. If prices stay steady or drop while your income grows, your purchasing power rises. It is the bridge between money and real life. The number on your payslip only matters if it keeps up with the cost of living.

Mini story: Student life in two decades

Imagine Anna, a student in 2005, and her younger brother Peter, who started university in 2025. Back in 2005, Anna could buy a cafeteria lunch for €2, a bus ticket for €0.50, and a coffee for €1. Her monthly allowance of €200 stretched far enough to cover meals, transport, and some nights out. Fast forward to 2025. Peter gets €400 from his parents every month - twice as much as Anna did. But his cafeteria lunch now costs €5, a bus ticket €1.50, and a coffee €2.50. Even with more cash in his wallet, Peter struggles to cover the same lifestyle Anna enjoyed 20 years earlier. This is the power of inflation eating away at purchasing power. The number looks bigger, but what it buys is smaller.

How purchasing power changes

Purchasing power shifts with three main factors:

• Inflation - rising prices lower purchasing power.
• Deflation - falling prices raise purchasing power.
• Income growth - if wages grow faster than prices, purchasing power rises.

The balance between prices and income is what matters. This is why many workers demand wage increases during times of inflation - to avoid losing ground.

Purchasing power in numbers

This chart shows what happens to €100 over 10 years with 3% annual inflation. The line drops because the same €100 buys less each year.

Comparisons across time

Here is a simple example that shows how the same €10 can buy different amounts over time.

Why this matters for you

Purchasing power is not just an abstract concept. It determines how far your salary, allowance, or savings can stretch. When you plan a budget, negotiate a raise, or think about saving for the future, you are really managing your purchasing power. Protecting it means making choices that keep your money useful over time - such as investing, avoiding too much debt, and adjusting spending when costs rise.

Summary

• Purchasing power shows what money can actually buy in real life
• It goes up if incomes rise faster than prices, and down if prices rise faster
• Tracking purchasing power helps you protect your lifestyle and plan ahead

Key Terms

• Purchasing power
• Inflation
• Cost of living

Further Learning

• Purchasing Power - Investopedia
• Back to Basics - IMF on Purchasing Power