When evaluating business financing options, the annual interest rate is only part of the story. Lenders use different rate structures, such as interest rates, annual percentage rates (APRs), or factor rates. They may also deduct fees before funding. Two offers that look similar on the surface might yield very different results when you consider fees, repayment structure, and term length. To make wiser decisions, you need to understand the total cost of capital and use it to compare offers on equal terms.
Let us first define the standard terminology.
Amortization
Traditional business loans are often amortizing, meaning each payment gradually reduces the outstanding principal balance over time. Because interest is charged only on the remaining balance, the total interest cost declines as the loan is repaid.
For example, on a $1M loan, you pay interest on the full $1M in month one, but by month two, interest is calculated only on the remaining balance after your first payment. This structure results in a lower total borrowing cost than a fixed repayment structure where charges apply to the original principal for the entire term.
Interest Rates
An interest rate represents the annual cost of borrowing expressed as a percentage of the principal amount. Traditional business loans typically quote an annual interest rate.
For example, a lender may offer a business loan with a 15% annual interest rate. On a simple-interest basis, this might appear to mean repaying $1.15M after one year on a $1M loan. However, most traditional business loans are amortizing, meaning the principal balance declines with each payment. As a result, a 12-month amortizing loan at 15% would actually have a total repayment closer to $1.083M before fees.
APR (Annual Percentage Rate)
The APR includes the interest rate plus associated financing costs, such as origination, processing, and closing fees, expressed as an annualized percentage. Because APR accounts for both fees and payment timing, it provides a more complete picture of the actual cost of borrowing than the stated interest rate alone.
The actual formula is as follows:
APR = monthly IRR × 12 (where IRR is the monthly rate at which the present value of all payments equals the amount received.)
For example, a $1M amortizing loan with a 15% interest rate and a 1.5% origination fee may ultimately carry an effective APR closer to 18%, because the borrower receives less than the full loan amount upfront but still makes the same scheduled payments.
Factor Rates
Many alternative lenders use a factor rate rather than an Interest Rate or APR. A factor rate represents the total repayment amount relative to the financing amount, regardless of how quickly the balance is repaid. For example, a 1.15 factor rate on a $1M financing means the borrower will repay $1.15M total before any additional fees.
Unlike traditional amortizing loans, factor rate financing generally applies the full borrowing cost to the original principal balance for the entire term. Even though the borrower makes regular payments that reduce the outstanding balance over time, the repayment amount usually does not decrease.
As a result, a 1.15 factor rate may initially appear similar to a 15% interest rate, but the effective APR is often materially higher once payment timing, fees, and the fixed repayment structure are taken into account. In many cases, a 1.15 factor rate can equate to an effective APR closer to 28% over a 12-month term.
Payment Frequency
Weekly and monthly payment schedules are often available with factor rate financings. Where you can, choose the repayment frequency most adapted to your business and cash flow model. Weekly payments work well if you have consistent revenue or prefer to make smaller payments more often. Monthly payments sometimes align better with B2B businesses that get paid with net-30 or net-60 terms.
$1M Loan - Interest Rate and APR Example
The example below illustrates how the total cost of capital works in a traditional amortizing business loan.
Financing Amount: $1M
Interest Rate: 15%
Term: 12 months
Origination Fee: 1.5% ($15K)
Received Amount: $985K*
Monthly Payment: $90.26K
Total Repayment: $1.083M
* The received amount is slightly lower than the financing amount because the lender deducted a 1.5% origination fee at funding.
Calculate the Interest Cost
The interest cost is the difference between the total repayment and the original financing amount:
Total Interest = $1.083M − $1M = $83.12K*
This is the cost of borrowing before any other fees are added.
Determine the Total Cost of Capital
Now add back any required fees, such as the origination fee:
Total Cost of Capital = $83.12K + $15K = $98.12K
This amount represents the complete cost of accessing and repaying this financing.
Calculate the APR
The APR uses the same principle as the Internal Rate of Return (IRR), a financial metric that accounts for the time value of money. It accounts for the timing of each payment, the total number of payments, the amount you actually receive after fees, and the fixed payment amount over time.
The stated interest rate is 15%, but once you account for the $15K origination fee that was deducted from the amount you received, the actual APR is higher.
In this $1M example, the stated interest rate is 15%, but you received only $985K after fees and made 12 monthly payments of $90.26K. Using the method described above to account for the reduced amount received and payment timing, this translates to an APR of approximately 18%.
The origination fee increased your effective cost from 15% to approximately 18% because you received less money upfront, but still paid the same interest as if you had borrowed the full $1M.
Financial calculator, spreadsheet templates, and online models are available to compute this easily and accurately.
$1M Loan - Factor Rate Example
Now, let us compare this to a factor rate financing that might appear similar on the surface:
- Financing Amount: $1M
- Factor Rate: 1.15
- Term: 12 months
- Origination Fee: 1.5% ($15K)
- Received Amount: $985K
- Total Repayment: $1.15M
- Monthly Payment: $95.833K
Calculate the Factor Rate Cost of Capital
To calculate the Factor Rate Cost, deduct the Financing Amount from the Total Repayment:
Factor Rate Cost = $1.15M − $1M = $150K*
* This amount compares to the Interest Cost of $83.12K in the example above.
Determine the Factor Rate Total Cost of Capital
Now add back associated fees, such as the origination fee in this example:
Total Cost of Capital = $150K + $15K = $165K*
* This amount compares to the Total Cost of Capital of $98.12K in the examples above.
Calculate the Effective Factor Rate
To find the effective factor rate, divide the total repayment by the amount actually received:
Effective Factor Rate = $1.15M ÷ $985K ≈ 1.168
The origination fee moves the effective factor rate from the stated 1.15 to approximately 1.168.
Cents on the Dollar
In factor rate transactions, some focus on the cost per dollar borrowed instead. To do so, divide the Factor Rate Total Cost of Capital by the Financing Amount:
Cents on the Dollar = $165K ÷ $1M = $0.165
This means that you are paying 16.5 cents per dollar borrowed, including all fees.
Calculate the Effective APR
To calculate the APR, you need to account for the amount received ($985K), the absence of declining-balance amortization, and the timing of the monthly payments of $95.833K. The APR for this same transaction with a 1.15 factor rate and a 1.5% origination fee equates to approximately 28%.
Putting It All Together
A $1M loan with 15% interest rate and a 1.5% origination fee generates a Total Cost of Capital of $98.12K and an APR of approximately 18%. The same loan with a 1.15 factor rate and the same 1.5% origination fee generates a total cost of capital of $165K and an APR of approximately 28%.
The factor rate financing costs $66.88K more. Although a 1.15 factor rate may look similar to a 15% interest rate at first glance, its effective APR is approximately 28%. A 1.15 factor rate and a 15% interest rate are not equivalent.
Key Takeaways
Before selecting your next financing, consider the following:
- Clarify whether the loan is amortizing (interest on declining balance) or not (repayment based on original loan amount). Interest rate loans and factor rate loans are fundamentally different. A 15% interest rate is not equivalent to a 1.15 factor rate.
- What fees will be deducted from the amount you will receive? Always consider the total cost of capital, including payments, origination fees, and any other fees. Understanding the Total Cost of Capital associated with your financing will help you compare offers accurately and make better decisions.
- Does the repayment frequency work with your business model?
- Use this same approach for any type of financing, including asset-based lending, specialty finance, SBA financing, or real estate financing.
- While the total cost is often a selection criterion, faster funding or flexible terms may sometimes justify a higher cost. What matters is that you understand the trade-off and choose financing that genuinely supports your business’s growth.
Note: All dollar amounts in examples are rounded for clarity.