Pricing & Math
Should I choose a fixed or variable rate business loan?
Fixed-rate loans lock your interest cost for the full term — predictable payments, no rate-spike exposure; variable-rate loans float against a reference index (prime rate, published in the Federal Reserve H.15 release, or SOFR, published by the Federal Reserve Bank of New York) — potentially cheaper when rates fall but carrying payment-shock risk when rates spike, as the 2022–2023 rate cycle demonstrated.
The full picture
How Rate Indexes Work: Prime and SOFR
Variable-rate business loans float against a reference index — the two most common are the prime rate and SOFR (Secured Overnight Financing Rate). The prime rate is set by large U.S. commercial banks at roughly the federal funds target rate plus 3% — it moves whenever the Federal Reserve adjusts the federal funds rate, and is published daily in the Federal Reserve H.15 statistical release. SOFR, introduced by the Federal Reserve Bank of New York as a replacement for LIBOR, is based on actual overnight Treasury repo transactions and published daily by the New York Fed — it is not part of the H.15 release. Both are authoritative public references for verifying the index rate on a variable-rate loan. A typical variable-rate business loan might be priced as 'prime + 1.5%' or 'SOFR + 2.0%' — your rate moves as the index moves, with no floor unless contractually specified.
Payment-Shock Math During Rate Spikes
The 2022–2023 Federal Reserve rate cycle is the definitive case study in business-loan payment shock. The federal funds rate rose from 0.25% in March 2022 to 5.50% by July 2023 — a 525 basis-point increase in 16 months. For a variable-rate borrower with a $250,000 loan at prime + 1.0% (4.25% effective in early 2022), that same loan repriced to 8.50% by mid-2023 — a monthly payment increase of approximately $700–$1,000 on a 5-year term. Businesses without rate-shock planning absorbed this increase directly into operating cash flow. According to Federal Reserve H.15 data, the prime rate rose from 3.25% in March 2022 to 8.50% by August 2023.
When Fixed vs. Variable Makes Sense
Fixed rate is right when: You want payment certainty for budgeting purposes, you're financing a long-term asset (equipment, real estate) where you'll hold the loan to maturity, you believe rates are likely to stay flat or rise, your cash margins are thin and you can't absorb a payment increase. Variable rate is right when: You expect rates to decline materially (and have evidence-based conviction, not just hope), your loan term is short (12–24 months), you have strong operating cash flow and can absorb rate movement, or the available fixed-rate pricing is significantly worse than the variable starting rate and you're confident you'll refinance before a rate spike materializes. SBA 7(a) loans are predominantly variable-rate (prime-based) — a deliberate program design choice that keeps initial pricing accessible while passing rate risk to borrowers with SBA guarantee protection on the credit side.
Sources
- The Federal Reserve H.15 statistical release publishes daily selected interest rates including the prime rate — this is the authoritative public reference borrowers should use to verify the prime-rate index applied to variable-rate loan repricing. — Federal Reserve — H.15 Selected Interest Rates
- SOFR is published daily by the Federal Reserve Bank of New York, not the H.15 release — it is calculated from actual overnight Treasury repurchase-agreement transactions and is the authoritative public reference for verifying a SOFR-indexed loan's rate. — Federal Reserve Bank of New York — SOFR Reference Rates
- The prime rate rose from 3.25% in March 2022 to 8.50% by August 2023 — a 525 basis-point increase in 16 months — driven by Federal Reserve federal funds rate hikes targeting post-pandemic inflation, representing the sharpest rate cycle in 40 years. — Federal Reserve — H.15 Historical Data
- SBA 7(a) loans use a variable rate structure tied to the prime rate — the SBA caps the maximum spread lenders can charge above prime by loan size: up to 6.5% for loans of $50,000 or less, 6.0% for $50,001–$250,000, 4.5% for $250,001–$350,000, and 3.0% for loans over $350,000. — SBA — 7(a) Loan Program Terms, Conditions, and Eligibility
Key takeaways
- Fixed rate: locked payment, predictable budgeting, no rate-spike exposure — right for long-term financing, thin-margin businesses, and rising-rate environments.
- Variable rate: floats against prime (Fed H.15 release) or SOFR (published daily by the New York Fed) — potentially cheaper when rates fall, but carries payment-shock risk in rising cycles.
- The 2022–2023 rate cycle raised the prime rate 525 bps in 16 months — variable-rate borrowers absorbed this directly into monthly payments.
- SBA 7(a) loans are predominantly variable-rate (prime + spread) — understand the repricing mechanics before signing.
- If you're evaluating a variable-rate offer: stress-test your cash flow at +300 bps to your current rate; if the payment shock breaks your DSCR, choose fixed.
Frequently asked questions
What's the difference between a fixed and variable rate business loan?
A fixed-rate loan locks your interest cost for the full term, so payments stay the same regardless of what happens to benchmark rates. A variable-rate loan floats against a reference index — typically the prime rate (Federal Reserve H.15 release) or SOFR (published daily by the New York Fed) — so payments rise or fall as the index moves.
How much can a variable business loan rate change?
It tracks the underlying index. During the 2022–2023 rate cycle, the prime rate rose from 3.25% in March 2022 to 8.50% by August 2023 — a 525 basis-point increase in 16 months. A $250,000 loan priced at prime + 1.0% saw its monthly payment increase by roughly $700–$1,000 over that period.
Are SBA 7(a) loans fixed or variable rate?
Predominantly variable. SBA 7(a) loans are typically priced at prime plus a lender spread capped by loan size — up to 6.5% for loans of $50,000 or less, down to 3.0% for loans over $350,000 — so the rate moves with the prime rate over the life of the loan.
How do I know if I should choose fixed or variable?
Choose fixed if you need predictable payments for budgeting, are financing a long-term asset you'll hold to maturity, or have thin cash margins that can't absorb a payment increase. Choose variable if your loan term is short, your cash flow is strong enough to absorb rate movement, or you have a specific, evidence-based reason to expect rates to fall. A useful test: stress-test your cash flow at +300 basis points above the current rate — if that payment level breaks your DSCR, choose fixed.
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Published 2026-05-21 · Updated 2026-08-17 · https://clearvaluelending.com/answers/business-loan-fixed-vs-variable-rate