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Compound Interest

Interest that earns interest on itself, making money snowball. The earlier you start, the stronger it works.

The Master's Lesson

You rascal! You dare speak of building wealth without knowing compound interest? Listen well. With simple interest, only your original money earns interest. With compound interest, the interest you earned last year joins the principal and earns interest of its own. Each year's harvest is planted again, so the growth speeds up the longer you leave it alone.

This is the old teaching of jeokto-seongsan (積土成山) β€” piled-up soil becomes a mountain. Roll a snowball down a hill: at first it is the size of your fist, but soon it is taller than you. In compounding, the most precious ingredient is not money but time. That is why starting early with small amounts often beats starting late with large ones.

But mark this, foolish one: compounding works just as faithfully for debt. Unpaid interest gets added to what you owe, and then that too gathers interest. The snowball that serves the saver crushes the borrower. Make compounding your servant, never your master. And since every product calculates and pays interest differently, always confirm the exact terms with your financial institution and official guides.

Always check exact rates and conditions with your financial institution or official guides.

Behold These Cases

You redeposited both principal and interest when your savings matured

That is the basic move of compounding β€” letting interest become principal that earns again.

Someone who saved small amounts from age 20 overtook someone who started big at 30

Time is the main fuel of compounding, so the early starter often wins.

You postponed paying credit card interest and the debt grew much larger

Compounding applies to debt too β€” interest piles on top of unpaid interest.

Two products show the same rate but different interest payment schedules

How often interest is credited changes the outcome, so check each product's terms.

The Master's Commandments

  1. 1One β€” stop lamenting that it is late; start rolling even a small snowball today.
  2. 2Two β€” do not spend the interest you receive; add it back to the principal.
  3. 3Three β€” pay off interest-bearing debt first, so compounding never becomes your enemy.

FAQ

Q.What is the difference between simple and compound interest?
A.Simple interest is paid only on the principal. Compound interest is paid on the principal plus previously earned interest, so the gap widens over longer periods.
Q.What matters most for compounding to work?
A.Time. Small amounts invested early, consistently, and left untouched are the heart of compounding. Withdrawing interest along the way weakens the effect.
Q.Why do people say compounding is scary?
A.Because it applies to debt as well. When unpaid interest starts earning interest, the amount you owe can grow quickly.
Q.Where do I check how a product compounds?
A.Interest calculation methods and payment schedules differ by product. Confirm the exact terms with each financial institution and its official guides.
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