The most common point of confusion in merchant cash advance funding is the difference between a factor rate and an interest rate. They look similar on paper — both are expressed as numbers — but they calculate cost in completely different ways. Understanding this distinction can save you thousands of dollars.
An interest rate is a percentage charged on your outstanding balance over time. If you borrow $50,000 at 10% annual interest, you pay $5,000 in interest over one year — but only if you hold the full balance for the entire year. As you make payments and reduce the balance, the interest charges decrease because they are calculated on the remaining principal. This is how traditional loans, credit cards, and lines of credit work.
A factor rate is a fixed multiplier applied to your total funding amount. If you receive $50,000 with a 1.35 factor rate, you owe $50,000 times 1.35 equals $67,500 — period. That $17,500 in cost is locked in from day one. It does not decrease as you pay down the balance. Whether you repay in 4 months or 8 months, the total cost remains $67,500. There is no benefit to early repayment unless your contract specifically includes an early payoff discount, and most do not.
This is where the math gets critical. That 1.35 factor rate sounds like 35% — comparable to a credit card rate, right? Wrong. The effective APR depends entirely on the repayment term. If you repay $67,500 over 12 months, the effective APR is roughly 60-70%. Over 6 months, it jumps to 120-140%. Over 4 months, you are looking at 175% or more. The shorter the term, the higher the effective annualized cost.
Here is a concrete comparison. Scenario A: You take a $50,000 MCA with a 1.30 factor rate, repaid over 6 months with daily payments of approximately $430. Total repayment: $65,000. Total cost: $15,000. Effective APR: approximately 100%.
Scenario B: You take a $50,000 business loan at 24% annual interest, repaid over 12 months with monthly payments of approximately $4,730. Total repayment: $56,760. Total cost: $6,760. Effective APR: 24%.
Same funding amount. The MCA costs more than twice as much in fees despite having what appears to be a lower rate (1.30 factor rate versus 24% interest). The factor rate structure fundamentally changes the economics.
Some MCA companies add another layer by quoting a "buy rate" versus a "sell rate." The buy rate is what the funder charges the broker — say 1.25. The broker adds their commission on top, and the sell rate to you might be 1.35. That 0.10 difference on a $50,000 advance is $5,000 going to the broker. Always ask whether the factor rate includes broker fees or if additional points are being added.
Another important concept is the payback amount versus the net funding amount. If you have an existing MCA balance of $10,000, a new funder might approve you for $60,000 total but pay off the $10,000 existing balance and charge a $2,000 origination fee. Your net funding — the cash you actually receive — is $48,000. But you are paying back $60,000 times the factor rate. Your effective cost should be calculated on the $48,000 you received, not the $60,000 gross approval.
When comparing offers, always calculate three numbers: total cost of capital (payback amount minus net funding received), effective APR (using the actual term length), and daily payment as a percentage of your average daily revenue. These three metrics give you a complete picture that a factor rate alone cannot provide.
Do not be intimidated by the math. Use online calculators or ask the funder to provide the total repayment amount in writing. Any reputable funder will clearly disclose the factor rate, total payback amount, payment frequency, payment amount, and estimated term. If a funder or broker is vague about these numbers, that is a red flag.