SOFR and the federal funds rate are both overnight U.S. dollar reference rates, but they answer different questions. SOFR measures the cost of borrowing cash overnight against U.S. Treasury collateral in the repo market. The federal funds rate refers to overnight borrowing of reserve balances; the Federal Open Market Committee (FOMC) sets a *target range* for that market, while the New York Fed publishes the observed Effective Federal Funds Rate (EFFR).
The practical rule is simple: do not substitute one for the other because the numbers happen to be close. Start with the rate named in the contract, chart or policy statement, then check what it measures and when it is published.
Key takeaways
- SOFR is a secured, transaction-based Treasury-repo benchmark; it is not the Fed’s policy target.
- The FOMC sets a target range for the federal funds rate. EFFR is the observed rate produced from reported federal-funds transactions.
- A floating-rate instrument may use overnight SOFR, a compounded SOFR average, Term SOFR, EFFR or another benchmark. The contract convention matters as much as the headline rate.
SOFR vs fed funds rate: the core difference
The shortest useful answer is collateral and role. SOFR is built from overnight financing transactions backed by U.S. Treasury securities. Federal-funds transactions are unsecured overnight lending of reserve balances between eligible institutions. The FOMC’s target range is a policy setting that influences conditions; it is not a transaction benchmark calculated from the same market as SOFR.
Swipe horizontally to view all columns.
| Reference | What it represents | Secured? | Who produces or sets it | What a reader should check |
|---|---|---|---|---|
| FOMC target range | The policy range for the federal funds rate | Not a transaction rate | Set by the FOMC | Decision date and implementation note |
| EFFR | Observed overnight federal-funds transactions | No | New York Fed | Value date, methodology and daily reading |
| SOFR | Broad overnight Treasury-repo financing cost | Yes, U.S. Treasury collateral | New York Fed | Value date, daily SOFR or the applicable average/index |
The Federal Reserve explains that it steers the federal funds rate primarily through the interest rate paid on reserve balances and the overnight reverse repurchase facility. In its 29 July 2026 statement, the FOMC kept its target range at 3.50% to 3.75%. That dated range is a policy example—not a substitute for EFFR or SOFR, and not a forecast. Federal Reserve policy-rate explainer and the 29 July statement provide the official context.
How the two observed benchmarks are produced
The New York Fed calculates EFFR from overnight federal-funds transactions reported by domestic banks and U.S. branches and agencies of foreign banks. SOFR, by contrast, is a volume-weighted median based on eligible Treasury-repo transactions across tri-party repo, General Collateral Finance repo and cleared bilateral repo activity. The difference in underlying market is why a small spread between the two rates does not make them interchangeable. New York Fed reference-rate definitions and SOFR methodology describe those inputs.
For a financial-news reader, that creates a useful translation:
- A report that the Fed raised, cut or held rates is usually about the FOMC target range.
- A discussion of actual unsecured overnight reserve funding should point to EFFR.
- A repo-market, floating-rate-note, swap or loan reference may point to SOFR, but the document still needs to say whether it uses daily SOFR, a compounded average or a term benchmark.
Why timing and contract language matter
SOFR is an overnight rate, yet many instruments need an interest amount for a longer coupon or loan period. The New York Fed publishes 30-, 90- and 180-calendar-day compounded SOFR averages and a SOFR Index for custom periods. Its methodology notes that daily SOFR is published one business day after its value date, while the averages and index are published on their value date. That timing detail can prevent an otherwise easy off-by-one comparison. New York Fed additional reference-rate information sets out the convention.
The next question is not “Which rate is higher today?” It is “Which convention did this instrument choose?” An overnight rate compounded in arrears, a lookback convention, a published average and forward-looking Term SOFR can lead to different payment timing and operational outcomes even when they relate to the same broad SOFR ecosystem. The official User’s Guide to SOFR explains why averaging daily overnight observations is common in cash products.
A four-step reading checklist
1. Identify the rate precisely. Is the item referring to the FOMC target range, EFFR, daily SOFR, a SOFR average, the SOFR Index or Term SOFR? 2. Check collateral. SOFR reflects secured Treasury-repo financing; federal funds and EFFR refer to unsecured reserve-balance funding. 3. Match dates before comparing numbers. Note the rate’s value date, publication date and, for a policy decision, its effective date. 4. Read the instrument, not just the benchmark name. Look for the spread, reset frequency, day-count convention, compounding or averaging rule, lookback and payment timing.
For readers comparing global rate references with Japan’s long end, ATG Press’s Japan 10-Year Government Bond Yield guide explains a different kind of market price: a traded government-bond yield rather than an overnight policy or funding benchmark.
What not to infer from a narrow spread
A close SOFR–EFFR spread can be a useful market observation, but it does not erase the difference between secured repo financing and unsecured reserve lending. Nor does either observed benchmark by itself state the FOMC’s policy decision. Their relationship can move with market structure, reserve conditions, collateral demand and the central bank’s implementation tools.
That is why an accurate rate comparison starts with definitions, not a chart overlay. Use official benchmark data for the reading, and use the relevant contract or prospectus for the economic terms.
Sources
- Federal Reserve Board — Economy at a Glance: Policy Rate (accessed 16 September 2026)
- Federal Reserve Board — FOMC statement, 29 July 2026
- Federal Reserve Bank of New York — Secured Overnight Financing Rate Data (accessed 16 September 2026)
- Federal Reserve Bank of New York — Reference Rates (accessed 16 September 2026)
- Federal Reserve Bank of New York — Additional Information about Reference Rates (accessed 16 September 2026)
- Alternative Reference Rates Committee — A User’s Guide to SOFR (April 2019)
This article is for informational purposes only and does not constitute investment advice.
