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Total Interest Payable Calculator

Work out total interest payable instantly with clear inputs, formula shown and shareable results.

About Total Interest Payable Calculator

Total interest is simply every instalment added up less the amount borrowed. Expressing it per unit borrowed makes the cost of long tenures obvious: at 9.5% over 15 years you repay well over one and a half times what you borrowed.

Formula

Total interest

Total interest = EMI × n - P

EMI
Monthly instalment
n
Months
P
Principal

Worked example

With the default values below, Total Interest Payable Calculator returns Total Interest Payable of $879,604.43. Change any input above and every figure here is recalculated in your browser.

Inputs used

Loan Amountminimum 0
1,000,000
Annual Interest Rateaccepts 0–100 %
9.5 %
Tenure In Yearsaccepts 0.5–40
15

Results

Total Interest Payable
$879,604.43
Total Amount Repaid
$1,879,604.43
Interest Per Unit Borrowed
0.8796
Average Interest Per Month
$4,886.69

Step by step

  1. 1Values used
  2. 2Total interest
  3. 3Total Interest Payable= 879,604.43
  4. 4Total Amount Repaid= 1,879,604.43
  5. 5Interest Per Unit Borrowed= 0.8796
  6. 6Average Interest Per Month= 4,886.69

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax or fees or charges into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Figures are estimates. Lenders apply their own rounding, fees and eligibility rules, and rates change. This is not financial advice — confirm the numbers with your lender.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Figures are estimates. Lenders apply their own rounding, fees and eligibility rules, and rates change. This is not financial advice — confirm the numbers with your lender.

Frequently Asked Questions

Does a lower EMI mean a cheaper loan?

No. A lower EMI usually means a longer tenure and materially more interest overall.

How can total interest be reduced?

Shorten the tenure, prepay whenever possible, or refinance to a lower rate — in that order of impact for most borrowers.

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