principal
The principal is the original amount borrowed or invested, before any interest is added to it.
In plain English
It is the simplest word in finance and misunderstanding it is how people repay a loan for years without reducing it.
The principal is the actual sum. Borrow ₦500,000 and the principal is ₦500,000. Everything else you pay on top of that is interest, which is the price of using the money.
The critical thing to understand about any repayment is how it is split. Some of what you pay reduces the principal, and some simply pays interest. Early in most loans, a large share goes to interest and only a small share touches the principal, which is why borrowers who have paid diligently for two years are horrified to see how little they actually owe less.
With expensive lending, particularly apps and cards paid at the minimum, the repayment can cover the interest alone and never reach the principal at all. You pay forever and you owe the same amount, and it feels like a cruel joke because it very nearly is one.
On the other side, when you invest, the principal is what you put in and everything above it is return.
So always ask the lender one question. Of what I paid this month, how much reduced the principal? The answer will tell you whether you are repaying a debt or renting one.
You repay ₦40,000 a month on a loan. Of that, ₦31,000 is interest and ₦9,000 reduces the principal. After a year you have paid ₦480,000 and the amount you owe has fallen by ₦108,000.
Questions people ask
Why is my loan balance barely falling?
Because early repayments are weighted heavily towards interest. Ask for an amortisation schedule, which shows exactly how each payment is split.
Can I pay extra towards the principal?
Often yes, and it is extremely powerful, because it reduces the base that all future interest is calculated on. Confirm there is no early repayment penalty first.
What is principal in investing?
The original amount you put in. Everything above it is your return, which is why protecting the principal is the first job of any cautious investor.
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