How Your Mortgage EMI Is Actually Calculated
Your monthly mortgage payment looks like a simple fixed number, but the math behind it — and how it splits between interest and principal over time — surprises a lot of first-time buyers.
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The EMI formula
Your Equated Monthly Installment (EMI) is calculated so that the same payment amount fully pays off both principal and interest over your loan term. The formula is:
EMI = P × r × (1+r)^n / ((1+r)^n − 1)
Where P is your loan amount, r is your monthly interest rate (annual rate ÷ 12), and n is the total number of monthly payments (years × 12).
Why early payments are mostly interest
In the early years of a mortgage, a larger share of each EMI goes toward interest, with only a small portion reducing your principal. As the loan matures, that balance flips — later payments are mostly principal. This is why paying extra toward principal early in a mortgage saves disproportionately more total interest than doing the same later on.
How much the interest rate really matters
Even a 1% difference in interest rate can change total interest paid over a 25-year loan by a large amount — it's worth shopping between lenders rather than accepting the first rate offered.
Frequently asked questions
Does a longer loan term always mean paying more interest?
Can I pay off my mortgage early in the UAE?
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