Borrowing costs surged in the wake of the Fed’s tightening campaign. We recently showed that the headwind for larger companies that will have to refinance their maturing debt at higher interest rates in coming years should be manageable. But how much should we worry about the impact on small businesses, which are generally more vulnerable to funding stresses and other economic shocks?
Small business financing differs from that of large corporations in two important ways. First, small businesses spend a larger share of revenues on interest payments—we estimate around 6% for small and 2% for large businesses in 2021. Second, while the average maturity of small and large business debt appears to be roughly similar, economic research finds that small business debt has a bimodal maturity profile: roughly half consists of credit lines, short-term loans, and other floating-rate debt (vs. 20% for large businesses), while the other half consists of term loans with 7-year average maturities when issued (vs. 5½-year for large firms).
We forecast total small business interest expense by combining a top-down projection for floating-rate payments with a forecast for the fixed-rate segment using loan-level data from the Small Business Administration. We estimate that higher rates will increase the interest burden for small businesses by just over 1pp by 2024, from roughly 5.8% of revenues in 2021 to around 7% in 2024. Under our current rates forecasts, we forecast this share would increase further to just under 8% as term loans gradually mature—above the pre-pandemic share of 6.8% but similar to that of the mid-1990s.
Combining these interest cost headwinds with our standing estimates of the modest sensitivity of employment and capital spending to interest rates, we estimate that the GDP growth drag from small business borrowing costs will peak this year at just 0.1pp. In our baseline, we forecast this growth headwind will wane in 2024 before rising modestly later in the decade as term loans are refinanced.
Moreover, we expect the strong financial footing of small businesses to partially offset the hiring and investment drag from higher interest payments. We estimate that the small business sector is running a financial surplus worth 9.1% of sector revenues and 2.5% of economywide GDP. This indicator is a statistically significant predictor of business investment and argues for a tailwind to capex growth of as much as +4pp in the sector. The sector’s balance sheet is healthy as well, with cash ratios and net worth ratios both near 40-year highs and interest income set to rise roughly 0.4pp cumulatively as a share of revenues, reflecting higher short-term interest rates.
Where could we be wrong? One risk is that small businesses prove more sensitive to interest costs because of difficulty developing new banking relationships and difficulty accessing alternative sources of financing. Still, the share of businesses reporting that credit was harder to get relative to a few months ago stands at 8%—higher than before the pandemic but in line with the average share in the early 1990s.
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