Prime Rate vs APR vs Interest Rate vs Federal Funds Rate
Every major benchmark rate explained, compared, and mapped to the loan products they control
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Prime Rate vs Other Rates
What Is the Difference Between All These Rates?
The prime rate, federal funds rate, SOFR, APR, and interest rate are related but distinct concepts. The prime rate (6.75%) is what banks charge their best customers. The federal funds rate (3.50%–3.75%) is what banks charge each other overnight. SOFR (~3.50%) is the institutional lending benchmark that replaced LIBOR. APR is the total annual cost of your loan including fees. Your “interest rate” is just one component of APR. Understanding these differences helps you compare loan offers accurately and predict how Fed decisions affect your finances.
Quick Reference: All Rates at a Glance
- Prime Rate: 6.75% — Benchmark for consumer and small business variable-rate lending (credit cards, HELOCs, SBA loans)
- Federal Funds Rate: 3.50%–3.75% — Overnight interbank rate set by the FOMC. Prime = fed funds + 3.00%
- SOFR: ~3.50% — Secured overnight rate for institutional lending. Replaced LIBOR. Used for newer ARMs and commercial loans
- 10-Year Treasury: ~4.25% — Benchmark for fixed-rate mortgages. Set by bond market supply/demand, not the Fed
- APR: Varies — Total annual borrowing cost including interest + fees. Required by law on all consumer loan disclosures
- Interest Rate: Varies — The rate charged on the principal, excluding fees. Always ≤ APR
On This Page
Master Comparison Table
Every major benchmark rate in the U.S. financial system, compared side by side. Current values as of March 2026, sourced from the Federal Reserve H.15 release.
| Rate | Current Value | Set By | Changes How Often | Used For | Relationship to Prime |
|---|---|---|---|---|---|
| Prime Rate | 6.75% | 30 largest banks (WSJ survey) | When Fed moves | Credit cards, HELOCs, SBA loans, business LOC | — |
| Federal Funds Rate | 3.50%–3.75% | FOMC (8x/year) | 8 scheduled meetings | Overnight interbank lending | Prime = Fed funds + 3% |
| SOFR | ~3.50% | Market (NY Fed publishes) | Daily | New ARMs, commercial real estate, derivatives | Tracks fed funds closely |
| 10-Year Treasury | ~4.25% | Bond market | Every trading day | 30-year and 15-year fixed mortgages | Independent of prime |
| Discount Rate | 4.00% | Federal Reserve Board | When Fed moves | Emergency bank borrowing from the Fed | = Fed funds upper + 0.25% |
| APR | Varies by loan | Your lender | At origination (fixed) or with prime (variable) | Total cost disclosure on all consumer loans | Often = prime + margin + fees |
Prime Rate vs Federal Funds Rate
The federal funds rate is the most important rate in the U.S. economy because it controls the prime rate and, through it, virtually every consumer and small business lending rate. The FOMC sets the target range for the federal funds rate at 8 scheduled meetings per year.
The formula: Prime rate = federal funds rate (upper bound) + 3.00%. Current: 3.75% + 3.00% = 6.75%. This 3-point spread has been constant since 1994. When the FOMC changes the fed funds target, prime adjusts by the identical amount within one business day.
Key difference: The federal funds rate is what banks charge each other for overnight reserve loans. The prime rate is what banks charge their best customers. You never borrow at the federal funds rate directly — it flows through to you via prime (for variable-rate products) or indirectly through market pricing (for fixed-rate products).
Why 3.00%? The spread compensates banks for credit risk (customers can default; other banks rarely do), administrative costs, and profit margin. Before 1994, the spread varied between 2.5% and 3.5%. The standardization at 3.00% occurred when banks adopted uniform pricing conventions. For deep analysis, see our Prime Rate vs Federal Funds Rate vs SOFR article.
Prime Rate vs SOFR
SOFR (Secured Overnight Financing Rate) replaced LIBOR as the benchmark for institutional lending in 2023. Published daily by the New York Federal Reserve, SOFR measures the cost of overnight borrowing collateralized by U.S. Treasury securities.
Current values: Prime rate = 6.75%. SOFR ≈ 3.50%. The difference (~3.25%) exists because prime includes a larger credit risk premium (unsecured consumer lending) while SOFR reflects secured overnight lending backed by Treasuries.
Who uses which: Prime is the benchmark for consumer and small business products (credit cards, HELOCs, SBA 7(a) loans, business lines of credit). SOFR is the benchmark for institutional products (new adjustable-rate mortgages, commercial real estate loans, interest rate swaps, floating-rate corporate debt). If your product was originated after 2022 and says “adjustable” or “floating,” it likely references SOFR, not prime.
Both track the Fed: SOFR closely tracks the effective federal funds rate because both reflect overnight lending conditions. When the Fed cuts 0.25%, both SOFR and prime drop approximately 0.25%. The difference is that SOFR adjusts daily in the market while prime adjusts discretely when banks update their posted rate. Use the Prime Rate Forecast Calculator to see how both rates have moved historically.
Prime Rate vs Treasury Yields
This is the most misunderstood relationship in consumer finance. Many borrowers assume that when the Fed cuts (dropping prime) their fixed mortgage rate should also fall. It usually does not — because fixed mortgages are priced off Treasury yields, not prime.
How Treasury yields work: The 10-year Treasury yield is set by supply and demand in the bond market. It reflects long-term inflation expectations, government borrowing needs, and global capital flows. The Fed does not directly control Treasury yields (though its actions influence them indirectly).
The divergence in action: Since September 2024, the Fed cut short-term rates by 1.75% (prime fell from 8.50% to 6.75%). During the same period, the 10-year Treasury yield moved from ~3.75% to ~4.25% — it actually rose because bond investors priced in higher long-term inflation expectations. Result: HELOCs got 1.75% cheaper while 30-year fixed mortgages got slightly more expensive.
The bottom line: If you want a rate that drops when the Fed cuts, choose a prime-based product (HELOC, SBA variable, business LOC). If you want a rate that reflects long-term economic conditions, choose a Treasury-linked product (fixed mortgage). They serve different purposes and often move in different directions. See our detailed analysis: Prime Rate and Mortgages.
Interest Rate vs APR
The “interest rate” and “APR” on your loan statement are not the same thing. The Truth in Lending Act (Regulation Z) requires lenders to disclose both, and the difference matters when comparing offers.
Interest rate: The percentage charged on your outstanding principal, excluding fees. If your personal loan charges 10% interest on $20,000, you pay $2,000/year in interest (simplified).
APR (Annual Percentage Rate): The total annual cost of borrowing including interest AND fees (origination fees, closing costs, annual fees), expressed as a percentage. The same $20,000 loan at 10% interest with a 3% origination fee ($600) has an APR of approximately 11.2% over 3 years, because the fee is spread across the loan term.
Why APR > interest rate: Any loan with fees has an APR higher than its stated interest rate. The CFPB mandates APR disclosure precisely because it gives a truer comparison. A loan at 9% interest with a 5% origination fee is more expensive than a loan at 10% interest with no fee — the APRs make this clear (approximately 12.5% vs 10%).
For credit cards: APR and interest rate are effectively the same because most credit cards have no separate origination fee. Your card’s 21.49% APR means 21.49% interest on your balance. However, cards with annual fees ($95–$550) have an effective APR slightly higher than the stated APR when the fee is factored in. Use the Prime Rate Credit Card Calculator and the APR Calculator to compare true costs.
Which Rate Applies to Your Loan?
Here is a quick reference for which benchmark rate drives the pricing on each common loan type:
| Your Loan Type | Benchmark Rate | Current Benchmark | When It Changes |
|---|---|---|---|
| Credit card | Prime | 6.75% | Next billing cycle after Fed moves |
| HELOC | Prime | 6.75% | Monthly on look-back date |
| SBA 7(a) variable | Prime | 6.75% | Quarterly adjustment |
| Business line of credit | Prime | 6.75% | Monthly (banks) or per-draw (online) |
| New ARM (post-2022) | SOFR | ~3.50% | At annual reset date |
| 30-year fixed mortgage | 10-yr Treasury | ~4.25% | Never (locked at origination) |
| Personal loan (fixed) | Market/Prime (indirect) | N/A | Never (locked at origination) |
| Auto loan (fixed) | Market/Prime (indirect) | N/A | Never (locked at origination) |
For detailed guides on each product, see: credit cards, mortgages/HELOCs, business loans, and personal loans.
Frequently Asked Questions
Is the prime rate the same as the interest rate?
No. The prime rate is a benchmark (currently 6.75%) that lenders use as a starting point. Your interest rate is prime plus a margin based on your creditworthiness and product type. A credit card at prime + 15% has a 21.75% interest rate. The prime rate is one component of your rate, not the rate itself.
Is the prime rate the same as the federal funds rate?
No. The prime rate is always 3.00% above the federal funds rate upper bound. Current fed funds rate is 3.50%–3.75%, so prime is 3.75% + 3.00% = 6.75%. The fed funds rate is what banks charge each other; prime is what banks charge their best customers.
What is the difference between APR and interest rate?
The interest rate is the percentage charged on your principal. APR includes the interest rate plus all fees (origination, closing costs, annual fees) expressed as an annual percentage. APR is always equal to or higher than the interest rate. Always compare APR when shopping for loans.
What replaced LIBOR?
SOFR (Secured Overnight Financing Rate) replaced LIBOR as the primary benchmark for institutional lending in June 2023. Published daily by the NY Fed, SOFR is based on actual Treasury repo transactions. Consumer products that previously referenced LIBOR were transitioned to either SOFR or prime.
Why don’t mortgage rates drop when the Fed cuts rates?
Fixed-rate mortgages are tied to the 10-year Treasury yield, not the prime rate or federal funds rate. Treasury yields are set by bond market supply and demand and reflect long-term inflation expectations. The Fed controls short-term rates but not long-term bond yields. HELOCs and some ARMs DO drop with Fed cuts because they reference prime or SOFR.
Which rate should I watch if I have a HELOC?
Watch the prime rate. Your HELOC rate = prime + your margin. When the Fed cuts at an FOMC meeting, prime drops the same amount within one business day, and your HELOC adjusts on the next look-back date. Track decisions at our Fed Meeting Schedule page.
Related Resources
- Current Prime Rate: 6.75%
- The Prime Rate: Complete Guide
- Prime Rate by Bank
- Prime Rate vs Federal Funds Rate vs SOFR (deep dive)
- FOMC Meeting Schedule
References
- Federal Reserve — H.15 Selected Interest Rates
- Federal Reserve — Open Market Operations
- Federal Reserve — FOMC
- NY Fed — SOFR Reference Rate
- U.S. Treasury — Interest Rate Statistics
- CFPB — Regulation Z (Truth in Lending)
- CFPB — Credit Card Tools
- FRED — Bank Prime Loan Rate
- FRED — SOFR Rate
- FRED — 10-Year Treasury Constant Maturity
Calculators
- Prime Rate Impact Calculator
- Variable vs Fixed Rate Calculator
- APR Calculator
- Credit Card Calculator
- Rate History & Forecast Calculator
- Loan Payment Calculator