An EMI (equated monthly instalment) is the fixed amount you pay your lender each month until a loan is repaid. Each payment covers that month’s interest plus a slice of the principal. Over the life of the loan, the interest part shrinks and the principal part grows, but the total payment stays the same.
On a $100,000 business loan at 12% a year over 5 years, the EMI is $2,224.44. You’d repay $133,467 in total, of which $33,467 is interest.
Here’s where that number comes from, and what it means for your business.
The EMI formula
Banks use the standard amortisation formula:
EMI = P × r × (1 + r)ⁿ ÷ [(1 + r)ⁿ − 1]
- P is the loan amount (the principal)
- r is the monthly interest rate, which is the annual rate divided by 12
- n is the number of monthly payments
The rate must be the monthly one. A 12% annual rate becomes 1% a month, or 0.01. A five-year loan has 60 payments.
A worked example
Take a $100,000 term loan at 12% for 5 years.
- P = 100,000
- r = 12% ÷ 12 = 1% = 0.01
- n = 5 × 12 = 60
- (1.01)⁶⁰ = 1.8167
- EMI = 100,000 × 0.01 × 1.8167 ÷ (1.8167 − 1)
- EMI = 1,816.70 ÷ 0.8167 = $2,224.44
You don’t need to do this by hand. The point of seeing it once is to understand what drives the payment: the amount, the rate and the term.
Why your first payments are mostly interest
Interest is charged on the balance you still owe. At the start, you owe the full amount, so interest takes the biggest share of each payment.
| Month | EMI | Interest | Principal | Balance after payment |
|---|---|---|---|---|
| 1 | $2,224.44 | $1,000.00 | $1,224.44 | $98,775.56 |
| 2 | $2,224.44 | $987.76 | $1,236.68 | $97,538.88 |
| 30 | $2,224.44 | $590.42 | $1,634.02 | $57,408.00 |
| 60 | $2,224.87 | $22.03 | $2,202.84 | $0.00 |
The final payment is a few cents higher to clear rounding.
This matters if you plan to repay early. After half the term, you’ve paid half your instalments, but you still owe well over half the original loan. Before you prepay, ask your bank for the outstanding balance and any prepayment charges.
How the term changes what you pay
A longer term lowers the EMI, which helps monthly cash flow. But you pay interest for longer, so the total cost goes up.
| $100,000 at 12% | Monthly EMI | Total interest |
|---|---|---|
| 3 years (36 payments) | $3,321.43 | $19,572 |
| 5 years (60 payments) | $2,224.44 | $33,467 |
| 7 years (84 payments) | $1,765.27 | $48,283 |
When we assess a loan request, the question isn’t just “can the business afford the EMI?” It’s whether the business can pay it comfortably from operating cash flow, with room to spare. That’s what the debt service coverage ratio measures. Most banks want to see cash flow at least 1.25 times the total debt payments.
The flat-rate trap
Some lenders, especially for equipment and vehicle finance, quote a flat rate. A flat rate charges interest on the original amount for the whole term, even though you’re paying the loan down every month.
On our $100,000 example, a flat 12% for 5 years means:
- Interest = $100,000 × 12% × 5 = $60,000
- Monthly payment = ($100,000 + $60,000) ÷ 60 = $2,666.67
That’s $442 more a month than the reducing-balance EMI, and $26,533 more over the loan. In reducing-balance terms, a flat 12% works out at roughly 20.3% a year.
So if you’re comparing two offers, always ask: “Is this a flat rate or a reducing-balance rate?” If the lender quotes an APR or an effective annual rate, use that to compare.
What else affects your real cost
- Fees. Processing fees, arrangement fees and documentation charges raise the true cost of the loan, even though they don’t change the EMI.
- Floating rates. If your rate is linked to a benchmark, your EMI or term can change when the benchmark moves. Check the repricing clause before you sign. Our guide on how to read a bank term sheet shows what to look for.
- Payment frequency. Some loans are paid quarterly or in line with seasonal cash flow. The formula is the same, but r and n change to match the period.
- Islamic financing. In Ijarah or Diminishing Musharakah, you pay rentals or profit-based instalments rather than interest. The payment schedule is often built in a similar way, but the contract structure, ownership and rights are different, so read the terms carefully.
Check your own numbers
Use our free EMI Calculator to find the monthly payment and total interest for any amount, rate and term. To put two offers side by side, try the Loan Comparison Calculator.
The bottom line: your EMI depends on three numbers, the amount, the rate and the term. Get the rate on a reducing-balance basis, pick the shortest term your cash flow can comfortably carry, and keep a buffer for the months when sales are slow.
This article is for general information and isn’t financial advice. Loan terms vary by lender and country, so check the details with your bank.
Want to check this for your own business?
Our SME Loan Package Starter Kit calculates your DSCR, ratios and repayment schedule in one Excel file, with a document checklist and proposal outline.
From the credit desk
What we look for when this comes up in a real credit file:
- Banks check that the instalment fits comfortably inside your monthly cash flow, not just your annual profit. Seasonal businesses may need a structured or step-up schedule instead of equal instalments.
- On floating-rate loans the EMI is usually recalculated at each rate reset, so a rise in KIBOR can increase your instalment or extend the term.
- Always ask how the first instalment is calculated. Broken-period profit between disbursement and the first due date is often added to it.
Worked example: PKR 5 million over 5 years at 18% a year gives a monthly instalment of about PKR 127,000.
Sources and further reading
- State Bank of Pakistan: KIBOR rates
- State Bank of Pakistan: Laws and Regulations (Prudential Regulations)
Related guides
- Flat Rate vs Reducing Balance Interest: What a Business Loan Really Costs
- Fixed vs Floating Interest Rates on Business Loans
- How Much Can My Business Borrow? The Three Limits Lenders Check
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