What is the difference between the nominal and real interest rate?

The nominal interest rate is the rate “on paper”, while the real interest rate takes inflation into account. Put simply: the real interest rate is approximately the nominal rate minus inflation.

Can a deposit beat inflation?

Sometimes, but often not. A deposit is mainly a tool for stability and predictability, and is often a better alternative than 0% in a current account. For long-term growth, diversified investments are usually more suitable.

Why is a deposit ladder useful?

Because it reduces the risk of poor timing. Part of your funds matures regularly, you preserve liquidity, and you can adapt more easily to changes in interest rates.

The Value of Money Over Time

The time value of money is a fundamental concept in finance that directly affects our decisions about saving and investing. Inflation, as the silent enemy of savings, undermines the purchasing power of money, while deposits are one of the key tools for softening its effects. In this article, we will clearly and professionally explain why one euro today is not the same as one euro tomorrow, what role deposits play, how to calculate the real value of savings, and how to include deposits optimally in a personal financial strategy.

Basic economic rules: Why one euro today is not the same as one euro tomorrow

Economics follows a simple rule: one euro today is not the same as one euro tomorrow. There are several reasons for this. First, today’s euro can be invested and earn interest or a return. Second, because of inflation, that same euro will buy fewer goods and services tomorrow. This dual effect - compound interest on one side and inflation on the other - is the essence of understanding the time value of money. That is why it is crucial, when saving and investing, to take into account how the value of money changes over time.

Bank deposits: definition, types, and interest

A deposit is an agreement with a bank under which you lock away a certain amount of money for a set period in exchange for a known interest rate. The most common forms of deposits are:

Fixed-term deposit (time deposit): Funds are tied up for a specific term (for example 3, 6, 12, or 24 months). Advantages: usually higher interest and predictable returns. Disadvantages: lower liquidity, and early withdrawal is only possible with lost interest or extra costs.
Savings account: Greater flexibility, but usually lower interest. Suitable for an emergency fund.
Step-up deposit or deposit ladder: A set of several deposits with different maturities, which allows part of your funds to mature regularly and lets you adapt to new interest offers.

The compounding effect is not always automatic with deposits. Some deposits pay interest periodically, while others capitalize it. For comparability, always check the effective annual interest rate (APR).

Inflation as the enemy of savings

Inflation acts like a hidden “negative interest rate” on purchasing power. It is especially problematic during periods of suddenly higher inflation. In such periods, savers often move out of risky investments into more predictable and liquid options, such as deposits, savings accounts, and short-term bonds. It is important to understand that a deposit rarely beats inflation, because its main role is primarily to reduce the real loss and provide stability.

A deposit as a risk buffer and portfolio stabilizer

Even though a deposit often does not outperform inflation, it still has an important role in a portfolio:

Less real erosion than 0%: A deposit that earns interest is a better choice than funds sitting in a non-interest-bearing account.
Portfolio stabilizer: Deposits reduce the volatility of the overall portfolio and lower the risk of impulsive mistakes during market downturns.
Liquid reserve for opportunities: Deposits make it possible to redirect funds quickly into investment opportunities.
Matching maturity to the goal: Deposits provide predictability, which is sometimes more valuable than a higher but riskier return.

A practical framework for thinking: examples of real-value calculations

For a better understanding, let us look at a practical example:

Starting amount: 10.000 €
Deposit: 3 % annually (effective), capitalization once per year
Inflation: 5 % annually

After one year, the nominal balance is 10.300 €, but real purchasing power has fallen by approximately 190 €. If the funds had remained in an account with a 0 % interest rate, the real loss would have been even greater (approximately 285,71 €). A deposit therefore softens the effects of inflation, even if the real return is negative.

Quick rule of thumb (approximation)

The real return is approximately:

interest - inflation

Example: if your deposit earns 3 % and inflation is 5 %, the real return is approximately -2 % per year (simplified).

Where a deposit shines and where it is not optimal

A deposit is most suitable when we need a guaranteed and predictable return in the short or medium term, have low risk tolerance, are building an emergency fund, or want stability and diversification in a portfolio. It is not optimal, however, for long-term goals (5 to 10+ years), where it makes more sense to look for higher real growth in wealth through equity ETFs or globally diversified investments.

Risks and fine print with deposits

Deposits are low-risk, but risk is never truly zero. Keep the following in mind:

Deposit guarantee: In the EU, deposits are protected up to 100.000 € per depositor per bank. For higher amounts, consider spreading funds across several banks.
Bank credit risk: Choose reputable banks and diversify larger sums.
Interest-rate risk: When you lock up funds, you may miss out on better rates later. A maturity ladder helps.
Liquidity and early withdrawals: Check the penalties and rules, because early withdrawal may mean losing interest or paying fees.
Tax treatment: Interest may be taxable, so compare net returns.

Practical use of deposits in a personal financial strategy

It makes sense to use deposits for:

Emergency fund: 3 to 6 (or 6 to 12) months of living expenses, often a combination of a savings account and short-term deposits.
Short-term goals (1 to 3 years): A deposit is the primary vehicle because of its predictability.
Portfolio stabilizer: To reduce volatility, it makes sense to set aside a percentage of the portfolio in deposits (for example 10 to 30 %).

Match the maturity to your needs: funds you will need in 3 to 6 months should be kept in a savings account or a short-term deposit; for money you will not need for a year or two, use a deposit ladder. Example of using a “ladder”: split 10.000 € into five equal deposits of 2.000 € each with maturities of 3, 6, 12, 18, and 24 months. That way, part of the funds matures regularly, which allows you to adapt to interest-rate changes and maintain greater liquidity.

Illustrative scenario: three paths for 20.000 € in an inflationary environment

Let us assume you have 20.000 € and expect inflation of 4 % over the next two years. Three options:

Current account (0 %): After two years, nominally 20.000 €, with a real purchasing-power loss of about 1.520 €.
2-year deposit, 2,8 % APR: Real loss of about 474 €, which is significantly lower than at 0 %.
Deposit ladder (average 2,6 to 3,0 %): Real loss of about 400-550 €, with the added advantage of interim liquidity and the ability to adapt to interest-rate changes.

The key point: a deposit does not stop inflation, but it significantly softens its effects compared with non-interest-bearing funds.

Summary and recommendations for savers

Inflation is a constant reality and acts like a “negative interest rate” on purchasing power.
Deposits provide predictability, safety (with protection up to a certain amount), and stability, and they are an excellent counterweight in a portfolio, even though they rarely beat inflation.
The real interest rate is the compass for decision-making. High inflation can push real returns below zero, but a deposit will often beat the 0 % alternative.
A deposit ladder is a practical tactic for balancing returns, liquidity, and interest-rate risk.
Matching maturity to goals is crucial: short-term goals and an emergency fund are the natural territory of deposits, while long-term growth belongs to diversified equity investments.
Always compare net returns (after taxes and costs), watch out for penalties on early withdrawal, and diversify funds across banks for amounts above the guarantee limit.

Conclusion: The role of deposits in the modern financial environment

In a world where geopolitical, energy, and price shocks are more frequent, the built-in stability of deposits is valuable. A deposit will not magically eliminate inflationary pressure, but when used wisely it will protect part of your purchasing power, preserve liquidity for opportunities, and help maintain discipline in a long-term strategy. In other words: a deposit is a basic brick in the safety wall, not the whole house. When properly included in a portfolio, it remains a reliable risk buffer and stabilizer in uncertain times.