Compound interest · NOUQUD Glossary

Returns calculated on your original money and on every return before it, so the balance grows on itself year after year.

What does it mean?

With simple interest the rate applies only to what you started with. With compounding, each period's return joins the principal, and the next rate is applied to the new total.

Put SAR 10,000 in at 8% a year. Year one returns SAR 800. Year two does not return SAR 800 again: it returns SAR 864, because the rate now applies to SAR 10,800. That small gap is the entire story, and it shows up over decades rather than months.

The strongest variable in the formula is not the rate. It is the number of years. Time is what compounds.

Why should I care?

Because it runs in both directions. It is what turns a modest monthly saving into a serious sum after twenty years, and equally what doubles a revolving TermCredit cardبطاقة ائتمانA card that lets you borrow money to pay for purchases now and repay the bank later, usually with interest.Open the term balance at 36% a year before you have noticed.

The asymmetry is the part worth knowing. Debt compounds at a rate somebody else sets and you cannot opt out of; savings compound at a rate you have to go looking for. A card at 36% doubles what you owe in about two years. A deposit paying 5% takes about fourteen to double what you have.

It is also slower to start than most people expect. Through the first two decades of a monthly savings plan, more of the balance is money you put in than money it earned. Compounding is not a trick that rescues a small amount; it is what rewards a large number of ordinary months.

Which is why the number that matters is never the headline rate. It is that rate minus TermInflationالتضخّمA general rise in prices over time, so one riyal today buys less than it did a year ago.Open the term in the currency you actually hold: and when that figure is negative, compounding is working against you at exactly the speed it would otherwise have worked for you.

What should I know?

Compounding frequency matters: the same headline rate produces more if it compounds monthly rather than annually.
Fees compound too. A 1.5% annual management fee eats a serious TermStockالسهمA share of ownership in a company, bought and sold on a stock exchange, that may pay dividends and rise or fall in value.Open the term of the return across twenty years.
These figures are nominal. Inflation erodes purchasing power even while the balance climbs.
In Shariah-compliant products (murabaha, ijara, TermSukukالصكوكA security representing ownership of a share in a real asset or project, not a debt owed by the issuer.Open the term) the growth arrives as a profit margin or rent rather than as interest, but the compounding arithmetic is unchanged. If you hold one of these, the same multiplier is working on your money.