Understanding Interest Rates Before Taking a Business Loan

A business loan can help you buy equipment, manage a cash-flow gap, or fund expansion, but the advertised interest rate doesn’t always show what borrowing will really cost. Before signing, understand how the rate is calculated, what fees apply, and how the payment schedule will affect your business cash flow.

Interest rate vs. total cost
The interest rate is the charge for borrowing money. But the total cost of a loan may also include processing, service, appraisal, insurance, documentary, or other fees. Ask the lender for the effective interest rate (EIR), all charges, the amount you will actually receive, and the total amount you will repay.

In the Philippines, the Bangko Sentral ng Pilipinas’ published bank data for the week ending July 29, 2026, showed indicative SME lending rates ranging from 5.85% to 11.29% annually and effective rates ranging from 7.16% to 14.17%. These are reported ranges, not a quote or guarantee for your business, and individual offers can differ.

Flat or diminishing balance?
The way interest is calculated can make two loans with similar-looking rates cost very differently.

Flat-rate interest is calculated on the original loan principal throughout the term, even as you repay it. The interest portion of your payment may not fall as the balance shrinks. Diminishing-balance interest is calculated on the remaining principal. As you pay down the loan, the amount on which interest is charged gets smaller.

For example, a lender might quote a monthly rate that sounds low, but calculate it on the original loan amount. Ask whether the quoted rate is flat or based on the outstanding balance, and request a repayment schedule in pesos so you can see the difference.

Fixed or variable rates?
A fixed rate stays the same for the period specified in your agreement, making payments more predictable. A variable rate can change according to a benchmark or lender-defined terms, which may cause payments or total interest costs to rise or fall.

Before accepting a variable rate, ask what benchmark it follows, how often the lender can adjust it, whether there is a cap, and how much your payment could increase. Read the loan agreement for the exact adjustment rules.

Look beyond the monthly payment
A smaller monthly payment may come from a longer repayment term, not a cheaper loan. More months to repay can mean paying interest for longer. Compare offers using the same loan amount and term, and look at:

• The effective annual rate or EIR.
• The total repayment amount over the full term.
• The net proceeds you will receive after deductions.
• The payment schedule and whether payments are weekly, monthly, or otherwise.
• All upfront and recurring charges.
• Late-payment penalties, early-payment fees, collateral requirements, and any personal guarantee.

A government-backed option may have a different structure from a bank loan. For example, SB Corporation lists a Business Expansion Financing program with 0% interest for the first 12 months, followed by 1% per month based on a diminishing balance for the succeeding months. Check the program’s current eligibility rules and full charges directly with the provider.

Check whether the loan fits your cash flow
Estimate payments using realistic sales and expenses, not your best-case forecast. Make sure the business can cover the loan payment alongside payroll, rent, suppliers, taxes, and other obligations, including during slower months. If repayment depends on a new product, contract, or expansion, consider what happens if it takes longer than expected to generate revenue.

Borrow for a specific business purpose and amount. Taking more than you need can mean paying unnecessary interest and fees; borrowing too little may leave the project unfinished and the business still short of cash.

Questions to ask before signing
Request written answers to these questions:

1. Is the rate flat or calculated on the diminishing balance?
2. Is it fixed or variable, and can it change during the loan term?
3. What is the effective annual rate, including applicable fees?
4. How much will I receive after deductions, and how much will I repay in total?
5. What is the payment schedule, and can I repay early without a penalty?
6. What collateral, personal guarantees, or default charges apply?

Make a side-by-side comparison

Use a simple comparison table for every offer. Keep the amount and repayment period consistent where possible so you can compare like with like.

Compare written offers rather than choosing by the headline rate alone. A loan is more likely to support your business when you understand its full cost and can comfortably meet the repayment schedule.