Run it with less chaos · Every business
What a Small Business Loan Really Costs, Shown in Monthly Payments
A loan offer is usually described by its rate, but an owner pays it as a fixed amount every month or every week, and translating each offer into that payment, and into the total paid back, is the surest way to see which one the business can carry.
At a glance
- The monthly payment test turns any loan offer into two numbers an owner can check against the books: what leaves the account each month and the total paid back over the life of the loan.
- In the Federal Reserve Banks' 2025 Small Business Credit Survey, 60% of firms that borrowed from online lenders said their actual borrowing costs were higher than expected, compared with 37% of small bank borrowers and 32% of large bank borrowers.
- On an illustrative $50,000 loan over five years, the monthly payment is about $1,038 at 9% and $1,270 at 18%, and a short-term offer quoted as a 1.3 factor rate and repaid over 12 months works out to roughly 51% a year.
The number and where it comes from
The Federal Reserve Banks survey small employer firms each year about their finances, and the 2025 survey, with 6,525 responses from firms with 1 to 499 employees, asked borrowers whether their costs turned out higher or lower than they expected. Online lenders stood out, with 60% of their borrowers reporting higher-than-expected costs and only 4% reporting lower, and the most common complaints about online lenders were high interest rates and unfavorable repayment terms.
The survey also shows why so many owners are in this position. Sixty percent of firms applied for some kind of financing in the prior year, the most common reason was to meet operating expenses (56%), and only 42% of applicants received the full amount they sought. An owner who is borrowing to cover a slow stretch is often choosing quickly, with a thought like We just need to get through the next two months, which is exactly when the payment schedule deserves the closest look.
The calculation
A standard installment loan's monthly payment depends on three inputs, the amount, the annual rate and the number of months, and the standard amortization formula ties them together: payment = amount × monthly rate ÷ (1 − (1 + monthly rate) to the power of −months).
| Annual rate | Term | Monthly payment | Total interest paid | Source |
|---|---|---|---|---|
| 9% | 5 years | $1,038 | $12,275 | Rate assumed; payment calculated |
| 9% | 10 years | $633 | $26,005 | Rate assumed; payment calculated |
| 12% | 5 years | $1,112 | $16,733 | Rate assumed; payment calculated |
| 12% | 10 years | $717 | $36,083 | Rate assumed; payment calculated |
| 18% | 5 years | $1,270 | $26,180 | Rate assumed; payment calculated |
| 18% | 10 years | $901 | $58,111 | Rate assumed; payment calculated |
Two patterns stand out. A longer term lowers the monthly payment but roughly doubles the interest, and the difference between a 9% and an 18% loan over ten years is $32,106 in interest, more than half the original amount borrowed.
Some short-term offers are quoted as a factor rate rather than an annual rate, for example $50,000 advanced with $65,000 to be repaid, a factor of 1.3. Repaid in 12 equal monthly payments of $5,417, that cost is equivalent to an annual rate of about 51%; repaid in 52 weekly payments of $1,250, it is about 54%. Asking any lender for the annual percentage rate and the total repayment, in writing, lets an owner put every offer in the same table.
The payment then has to fit the business. A useful check is to divide the monthly payment by the average month's profit before the loan; if a slow month's profit would not cover the payment, the loan needs a longer term, a smaller amount or a cash reserve to back it.
General information, not legal/tax/financial advice; talk to a licensed professional about your situation.
How you compare
- Applying: 38% of firms in the 2025 survey applied for a loan, line of credit or merchant cash advance, and applicants to small banks were more likely than others to be fully approved, at 57%.
- Guarantees: of firms carrying debt, 59% had used a personal guarantee, so at most borrowing firms the owner is personally on the hook for the debt.
- No debt: 31% of firms reported no outstanding debt, up from 21% in the 2020 survey.
- Your own baseline: list every current loan, card balance and advance with its monthly payment and total remaining. The sum of the monthly payments, divided by a slow month's profit, is the number to keep below one.
The first step is to put every offer you are considering into the Exhibit 2 table, with its annual rate, term, monthly payment and total repaid, before signing anything.
Sources
- Federal Reserve Banks. 2026 Report on Employer Firms: Findings from the 2025 Small Business Credit Survey. March 2026. 6,525 employer firms.
Work with osNOVA on borrowing your business can carry
We help owner-run service businesses look at a loan the way it will feel each month, by building the cash forecast, comparing offers on payment and total cost and finding the slow-season fixes that reduce how much needs to be borrowed, so the business keeps steadier cash and fewer surprises.
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