Inflation is one of the first financial concepts every student should understand. It means that prices rise over time, reducing the purchasing power of money. If inflation is 10%, a basket of goods that cost 10,000 tenge last year may cost about 11,000 tenge this year. Even if income stays the same, the household becomes less financially comfortable.

Central banks fight inflation mainly through interest rates. In Kazakhstan, the National Bank sets a base rate that influences the cost of borrowing and the return on saving. In April 2026, the National Bank of Kazakhstan maintained the base rate at 18.0% with a corridor of plus or minus 1 percentage point. At the same time, annual inflation in March 2026 was reported at 11.0%, down from 11.7% in February.

Why does a high base rate matter?

When interest rates rise, borrowing becomes more expensive. Households may delay taking loans. Businesses may postpone investment. Demand slows down, and this can reduce inflation pressure. At the same time, deposits become more attractive because banks can offer higher returns to savers. A high rate may also support the national currency, because investors may prefer assets with higher yields.

But there is a cost. Higher rates can slow economic growth. If businesses borrow less, they may expand more slowly or hire fewer workers. If households borrow less, consumption may weaken. This is why central banks face a difficult trade-off: reduce inflation without creating too much damage to employment and growth.

Students often imagine monetary policy as a single button: “raise rates to reduce inflation.” But real policy is not that simple. Inflation can come from many sources:

  • food prices;
  • energy prices;
  • currency depreciation;
  • wage growth;
  • taxes and tariffs;
  • supply chain problems;
  • expectations about future inflation.

If inflation is caused by weak supply or expensive imports, raising rates may help, but it cannot instantly produce more food, fuel or housing. If inflation is driven by excessive demand, higher rates may work more directly.

For households, interest rates affect two sides of personal finance:

Borrowing: mortgages, consumer loans and business loans become more expensive when rates rise.

Saving: deposits and fixed-income instruments may become more attractive when rates are high.

For investors, interest rates also affect markets. Higher rates can reduce stock prices because future profits become less valuable and borrowing costs increase. Bonds react strongly to interest rate expectations. Currency markets also respond because higher rates can attract capital, but only if investors trust the country’s stability.

In Phronesia, interest rates should be one of the most important controls. Raising rates should reduce inflation over time, strengthen savings incentives and support currency confidence — but it should also raise loan costs and pressure growth. Lowering rates should support borrowing and investment — but may increase inflation and weaken the currency if done too aggressively.

The key lesson: interest rates are not just a central bank statistic. They connect inflation, loans, savings, investment, exchange rates and everyday household choices.