Amortization charges interest on your remaining (shrinking) balance and splits every payment between interest and principal, so the interest portion falls over time and early payoff saves you money; simple interest, as most small-business funders use the term, charges a fixed fee calculated once on the original amount, so the cost is locked in whether you pay early or not. That single difference — is interest recalculated as you pay down, or fixed on day one — drives almost everything that matters to a business owner: your monthly cash-flow burden, whether early payoff is rewarded or pointless, and how you should compare one offer against another. Below, we break down both models the way we evaluate them on the underwriting desk, with a realistic example table and a plain decision framework for which structure actually fits your revenue.
Key takeaways
- Amortization charges interest on your shrinking balance and splits each payment between interest and principal; the interest portion falls over time.
- Simple interest in small-business funding usually means a fixed fee set once on the original amount, most often expressed as a factor rate.
- Early payoff saves money on an amortizing loan but typically saves nothing on a fixed-fee advance unless a prepayment discount is offered.
- Amortizing loans quote an APR you can compare directly; factor-rate deals must be converted to an APR-equivalent for a fair comparison.
- Amortizing bank and SBA loans underwrite on credit, time in business, and financials; revenue-based advances underwrite on bank deposits and revenue.
- Revenue-based advances typically start near $10,000, work with FICO 500+, and can fund in about 24-48 hours.
- No legitimate funder guarantees approval — every real offer is underwritten.
What amortization actually means
An amortizing loan is built on a repayment schedule (the amortization schedule) where interest accrues on the outstanding balance. Every payment covers the interest owed for that period first, and whatever is left reduces principal. Because the balance shrinks each period, the interest slice of each payment gets smaller and the principal slice gets bigger, even though the total payment usually stays level.
Two practical consequences follow. First, early in the term you are paying mostly interest and building equity slowly. Second — and this is the part that helps a business — if you pay the loan off ahead of schedule, you stop the interest clock. You only owe interest for the time you actually held the money. Traditional term loans, SBA loans, equipment financing, and most bank credit are amortizing. This is the structure behind a standard business financing comparison when people picture a "loan" with a rate and a monthly payment.
What simple interest means in small-business funding
Here is where language gets slippery. In a finance textbook, "simple interest" means interest calculated on principal only, not compounded — and by that definition an amortizing loan can use simple-interest accrual daily. But in the small-business funding market, when a broker or funder says a deal is priced on "simple interest" or a factor rate, they almost always mean a fixed-fee structure: the cost is computed once, up front, on the original amount, and it does not change no matter how fast you repay.
A factor rate (for example, 1.25 or 1.40) is the clearest case. You multiply it against the funded amount to get the total repayment, and that number is fixed on day one. There is no shrinking balance and no amortization schedule reducing your interest as you go. Merchant cash advances, many revenue-based advances, and short-term "buy rate" products work this way. The cost is baked in, so paying early rarely lowers the total unless the contract specifically offers a prepayment discount.
The core difference, side by side
The mechanics diverge in a handful of ways that change how the money feels in your account:
- Where interest is charged: Amortization charges it on the declining balance. Simple-interest/factor pricing charges a flat fee on the original amount.
- Early payoff: Amortization rewards it — you cut off future interest. Fixed-fee simple interest usually does not, because the cost was already set.
- Payment shape: Amortized payments are typically equal installments (monthly). Fixed-fee advances are often repaid daily or weekly as a set amount or a percentage of deposits.
- Comparability: Amortizing loans quote an APR you can line up against other APRs. Factor-rate deals quote a total cost that must be converted to an APR-equivalent to compare fairly.
- Speed and approval: Amortizing bank/SBA loans lean on credit, time in business, and documentation. Fixed-fee revenue products lean on bank deposits and cash flow, and fund faster.
A realistic example: same funding, two structures
The figures below are illustrative ("for example") to show how the experience differs — not a quote. We deliberately avoid presenting exact total-payback math; the point is the shape of the cost and the payoff behavior.
| Feature | Amortizing term loan (for example) | Fixed-fee / factor-rate advance (for example) |
|---|---|---|
| How cost is calculated | Interest on the remaining balance, recalculated each period | One fixed fee set on the original amount |
| Payment rhythm | Equal monthly installments | Daily or weekly; often a % of deposits |
| Interest slice over time | Starts high, shrinks each month | Not applicable — cost is fixed up front |
| Pay off early? | Saves money — stops future interest | Usually no savings unless a discount is offered |
| Typical approval basis | Credit, time in business, financials | Bank deposits and revenue |
| Typical speed to fund | Days to weeks | Often 24-48 hours |
| Best when | Predictable, longer-term needs | Fast, revenue-backed working capital |
Notice the behavioral difference the table exposes: with amortization, your leverage is time — the faster you pay, the less you owe. With a fixed-fee advance, your leverage is selection — you lock the cost at signing, so the negotiation happens before you take the money, not after.
How each structure hits your cash flow
Underwriters care less about the label and more about the drain on daily cash. An amortizing monthly loan takes one predictable bite per month, which is easy to plan around if your revenue is steady. But if you have a slow month, the fixed monthly payment still lands in full.
Fixed-fee revenue products often take smaller, more frequent bites — daily or weekly — and when structured as a percentage of deposits, the dollar amount flexes with your sales. That can protect a seasonal or lumpy business in a down week, but frequent debits also mean you need to watch your balance closely so you never run dry mid-cycle. The right question is not "which rate is lower" but "which repayment rhythm matches how my money actually arrives."
Decision framework: which structure fits you
Choose an amortizing loan if:
- Your revenue is steady and you can absorb a fixed monthly payment even in a slow month.
- You want the option to pay off early and save on interest.
- Your credit, time in business, and financials are strong enough to qualify, and you can wait days to weeks.
- The need is longer-term or larger — expansion, real estate, equipment you'll use for years.
Choose a fixed-fee / revenue-based advance if:
- You need capital fast — often within 24-48 hours — and can't wait on a bank timeline.
- Your credit is thin or your FICO is below bank thresholds (many revenue products work with FICO 500+), but your bank deposits and revenue are healthy.
- You want cost certainty locked at signing and, ideally, payments that flex with your sales.
- The need is short-term working capital: inventory, payroll gaps, a time-sensitive opportunity.
Avoid a fixed-fee advance when you specifically plan to repay quickly to save money — the fixed cost usually erases that benefit. Avoid a rigid amortizing loan when your revenue swings hard month to month and a fixed installment could strand you in a slow stretch.
How to compare offers fairly
You cannot compare a factor rate to an APR at face value — they measure different things. To put a fixed-fee advance next to an amortizing loan, convert the advance's total cost and repayment window into an APR-equivalent, then weigh that against the loan's APR alongside the practical factors: speed, approval odds, payment rhythm, and whether early payoff matters to you.
Ask every funder the same four questions: (1) Is interest charged on the balance or fixed up front? (2) What is the total cost expressed as an APR-equivalent? (3) Does paying early reduce what I owe? (4) Are payments fixed or tied to my deposits? The answers sort any offer into one of these two buckets and tell you exactly what you're signing. And be wary of anyone promising a "guaranteed" approval — legitimate funders underwrite; they don't guarantee.
Frequently asked questions
Is a merchant cash advance amortized or simple interest?
Most merchant cash advances and revenue-based advances use a fixed-fee (factor-rate) structure, which the funding market often calls "simple interest." The cost is set once on the funded amount and does not shrink as you repay, so there's no amortization schedule reducing your interest over time.
Does paying off a loan early save money on both structures?
No. With an amortizing loan, early payoff stops future interest on the remaining balance, so you save. With a fixed-fee or factor-rate advance, the cost is locked at signing, so early payoff usually saves nothing unless the contract specifically includes a prepayment discount. Always ask before you sign.
Which is cheaper, amortization or simple interest?
It depends on the actual rate, the term, and whether you pay early — not on the label alone. An amortizing loan can be cheaper if you repay quickly, because interest stops. A fixed-fee advance can be competitive for short, fast-turnaround needs. Convert both to an APR-equivalent and compare the total cost against speed and approval odds.
What's the difference between a factor rate and an interest rate?
A factor rate (like 1.30) is multiplied against the funded amount to set a fixed total cost on day one — it doesn't recalculate as you pay. An interest rate on an amortizing loan is applied to the shrinking balance each period, so the interest you owe falls over time. They aren't directly comparable without converting to an APR-equivalent.
Why do funders quote factor rates instead of APR?
Fixed-fee products are priced on a set total cost rather than a declining balance, so a factor rate expresses that cost more directly than an APR does. It also reflects how these deals are underwritten — on revenue and bank deposits rather than a long amortization schedule. To compare fairly against a bank loan, convert the factor rate and repayment window to an APR-equivalent.
Can an amortizing loan use simple interest?
Yes, in the technical sense. "Simple interest" in a textbook means interest on principal without compounding, and many amortizing loans accrue interest that way daily on the outstanding balance. The confusion is that small-business funders often use "simple interest" to mean a fixed up-front fee. Always confirm whether interest is charged on the balance or fixed on the original amount.
I have a 520 FICO and steady deposits. Which structure can I get?
With a lower FICO but healthy revenue, a fixed-fee revenue-based advance is usually the more accessible path, since many of these products approve on bank deposits and revenue with FICO around 500+, minimums near $10,000, and funding in about 24-48 hours. Amortizing bank and SBA loans lean harder on credit and financials. No legitimate funder should promise guaranteed approval.
How do I compare two offers with different structures?
Convert each to an APR-equivalent so you're comparing the same measure, then weigh the practical factors: how fast you need the money, your approval odds, whether payments are fixed or flex with deposits, and whether you plan to pay early. The lowest headline number isn't automatically the best fit — the repayment rhythm that matches your cash flow often matters more.
