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Personal Finance 101 — Topic 6: What Is Compound Interest? (And Why Einstein Allegedly Called It the 8th Wonder)

The Quote You've Probably Heard "Compound interest is the eighth wonder of the world. He who understands it, earns it; he who doesn't, pays it." This quote gets attributed to Einstein constantly, on posters, in finance videos, probably somewhere in your own feed. Here's the catch: there's no solid historical evidence he ever actually said it. It's one of those quotes that sounds so fitting for a genius that it stuck, regardless of who actually said it first. But here's the thing, whoever said it was right about the concept, even if the attribution is shaky. Compound interest really is one of the most quietly powerful forces in personal finance. It's just usually working for you in investing, or against you in debt. What Compound Interest Actually Is Compound interest is interest earned not just on your original amount, but on the interest that amount has already earned. Compare it to simple interest, which only ever calculates interest ...
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Personal Finance 101 — Topic 5: Good Debt vs. Bad Debt

Debt Isn't Automatically the Enemy Say the word "debt" and most people picture something to avoid at all costs. But debt itself isn't good or bad, how it's used, and what it costs you, is what matters. Some debt can help you build a life or a future you couldn't otherwise afford, at a reasonable cost. Other debt quietly drains your money for years, with nothing to show for it. Learning to tell the two apart is one of the most useful money skills you can build. The Simple Test: What Did the Debt Buy You? Before labeling any debt "good" or "bad," ask two questions: Does this debt help me build wealth, income, or something that holds value over time? What's the interest rate, and is it worth what I'm getting in return? Debt that builds something lasting, at a reasonable interest rate, tends to be "good." Debt that pays for something that loses value immediately, especially at a high interest rate, t...

Personal Finance 101 — Topic 4: What Is Opportunity Cost?

The Cost You Never See on a Receipt You've probably never gotten a receipt that says "opportunity cost: €50." But every time you spend, save, or do nothing with your money, you're paying it anyway. Opportunity cost is one of those ideas that sounds academic but is actually something you already understand instinctively, you've just never had a name for it. Once you do, you start noticing it everywhere. The Simple Definition Opportunity cost is the value of what you give up when you choose one option over another. It's not just about money either, it applies to time, energy, and attention too. But in personal finance, it usually shows up as: every euro spent on one thing is a euro that can't be spent, saved, or invested somewhere else. There's no way around it. Choosing is giving something up, the question is just whether you're doing it consciously or not. Everyday Examples Let's make this concrete: The daily coffee. A €4 coffee, f...

Personal Finance 101 — Topic 2: Why You Need an Emergency Fund Before Anything Else

The Safety Net Nobody Talks About Enough Once you understand needs vs. wants and have a rough budget in place (see Topic 1 ), the next question is usually: "Great, now where does my money actually go first?" Before investing, before extra debt payments, before almost anything else, there's one financial priority that comes first: your emergency fund. It's not glamorous. It won't make you rich. But it's the single thing that keeps a bad month from turning into a bad year. What Is an Emergency Fund, Really? An emergency fund is money set aside, separate from your everyday spending account, specifically to cover unexpected expenses or income loss. Think: Losing your job or a major client An unexpected medical bill Urgent car or home repairs A sudden, unavoidable expense with no warning The key word is unexpected . This isn't your vacation fund or your "new phone" fund, those are savings goals, which are different. An emergency f...

Personal Finance 101 — Topic 1: What Is Money Actually For?

Most of us learn how to earn money long before we learn what to actually do with it. We get a paycheck, a bit of cash from a birthday, or our first freelance payment; and we spend it, save some of it, or just watch it disappear without really knowing where it went. Before diving into saving, investing, or debt, it helps to step back and ask a much simpler question: what is money actually for? The answer isn't "to buy things." Money is a tool that lets you turn your time and effort into choices; the ability to cover what you need, enjoy what you want and build toward what matters to you later. Once you see money as a tool rather than a scoreboard, everything else in personal finance gets easier to understand. Needs vs. Wants The foundation of every healthy money habit starts with one distinction: needs vs. wants. Needs are the things you must pay for to live and function: rent or mortgage, groceries, utilities, transportation to work, insurance, minimum debt payme...

Personal Finance 101 — Topic 3: Saving at 0% vs. Investing: The Real Cost of Doing Nothing

Is saving in a bank account enough? Many people think that keeping their money “safe” in a bank account is the most responsible financial decision. Indeed, saving regularly is important. However, there’s a critical aspect that often goes unmentioned: simply leaving your money in a bank account with a 0% return can actually cost you over time. If your money earns 0%, you’re losing money every year. This loss isn’t because your bank is taking your money away. Rather, it’s because of inflation . Understanding Inflation Inflation typically ranges from 3% to 10% per year, as seen in recent years. When inflation rises, the price of goods and services increases. If your savings remain stagnant and don’t grow, the purchasing power of your money slowly erodes. In other words, what you can buy with your money shrinks over time. How Inflation Reduces the Value of Your Savings Example: €10,000 saved at 0% for 10 years remains €10,000. With 3% inflation, that €10,000 is ...

Welcome to How to Money (HoM)

Money shouldn’t feel complicated, yet most of us were never taught how it really works. That’s why  How to Money  exists: to make finance clear, practical and part of everyday life. Here, you’ll find short, focused posts that break down the essentials, from budgeting and investing to understanding how markets move and how your decisions shape long‑term wealth. No confusing language. No lectures. Just real explanations that help you make smarter choices. This blog is for: People who want to finally understand what their money is doing. Beginners who feel lost in financial talk. Professionals who want to sharpen their decision‑making. Each post will give you something actionable; a concept, a mindset or a method you can use right away. Whether it’s a one‑minute read or a deeper dive, the goal stays the same:  clarity and confidence in your financial life. Welcome to  HoM;  your new home for understanding money.