What it means
Every time your business borrows money, whether through a bank loan, a line of credit, or investor debt, you pay for that privilege. That price is your cost of funds.
For a standard business, it is the blended interest rate and associated fees paid across all active financing sources. If you have a bank loan at five percent and a equipment lease at seven percent, your cost of funds sits between those two figures, weighted by how much you borrowed from each source.
This metric matters deeply because it sets your financial floor. If your cost of funds is six percent, any project, product, or customer loan you fund must generate a return higher than six percent just to break even.
Lenders watch this metric obsessively because their entire profit model relies on the spread between what they pay to get money and what they charge borrowers. In everyday management, tracking this cost helps you decide how to finance growth.
When interest rates rise in the broader economy, your cost of funds increases. This means your profit margins shrink unless you pass those higher costs on to your customers or find cheaper ways to finance your operations.
Monitoring this ensures you never price your offerings below your true cost of capital.
In practice
Real-world examples.
Example
A fintech startup borrows 500,000 pounds from a venture debt fund at an interest rate of 10 percent per year to finance its initial software development and marketing campaigns.
Example
A mid-sized manufacturing firm secures a commercial bank loan of 200,000 pounds at 6 percent and a supplier credit line of 50,000 pounds at 8 percent to purchase new factory equipment.
Example
A high street credit union attracts local savings deposits, paying customers 2 percent interest on those accounts, which forms the primary pool of capital it uses to fund local mortgages.
Think of it
“Think of the cost of funds like buying ingredients for a bakery. If you buy flour and sugar at a high wholesale price, you must charge more for your cakes to make a profit.
Formula
Calculation
Cost of Funds = (Total Interest Expense Paid / Total Funds Borrowed) * 100
Example: If a company pays 15,000 pounds in total interest across two different loans totalling 250,000 pounds, the calculation is:
(15,000 / 250,000) * 100 = 6 percent cost of funds.Case study
Seen in the real world.
Brighton Retail Group wanted to expand its chain of homeware shops by opening three new locations. To fund the fit-outs and initial inventory, the finance director arranged a blended funding package. The company secured a 300,000 pound commercial bank loan at a fixed rate of 5 percent and drew down a 100,000 pound revolving credit facility at an average variable rate of 9 percent.
To find the overall cost of funds, the director calculated the weighted average. The bank loan represented 75 percent of the total 400,000 pounds borrowed, contributing 3.75 percent (75 percent of 5 percent). The credit facility represented 25 percent, contributing 2.25 percent (25 percent of 9 percent). Adding these together gave Brighton Retail Group a total cost of funds of 6 percent.
Armed with this figure, the leadership team set a strict internal rule. Any new shop location had to project a return on investment of at least 10 percent to ensure it comfortably covered the 6 percent borrowing cost plus a healthy profit margin. By keeping a close eye on this metric, the company avoided unprofitable expansion.
Watch out
Common mistakes.
- Confusing the cost of funds with the total cost of running the business, ignoring that it specifically refers to the expense of borrowed money.
- Looking only at the headline interest rate and forgetting to include arrangement fees, legal costs, and administrative charges.
- Failing to update the calculation when variable interest rates change, leading to surprise drops in profit margins.
Questions
People also ask.
Is the cost of funds the same as the cost of capital?
Not quite. Cost of funds specifically relates to borrowed money and debt, whereas cost of capital includes both debt and equity funding.
Why does my cost of funds change over time?
It changes because base interest rates set by central banks fluctuate, and your mix of fixed and variable loans shifts as you pay off old debt and take on new debt.
How can a small business lower its cost of funds?
You can lower it by improving your credit score, shopping around for cheaper lenders, paying off high-interest debt first, or negotiating better terms with your bank.
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