Avoid Payment Shocks in CRE Financing: Choosing SOFR or Prime

SOFR is a secured, transaction-based overnight repo rate published daily by the New York Fed, while prime is an unsecured, bank-posted base rate that moves with the federal funds target. The practical takeaway: choose SOFR when you want transparency and a market-anchored index, and choose prime when borrower simplicity and predictable servicing matter more than precision.

TL;DR:

• SOFR, being transaction-based and published daily, responds quickly to market liquidity changes, which can cause short-term fluctuations in loan payments.
• Prime, set by banks and adjusting only when major lenders agree, remains relatively stable and is typically about 300 basis points above the federal funds rate.
• Borrowers on SOFR-indexed loans must handle compounding calculations and precise contract language, while prime loans apply the posted rate directly with no lag.
• Regulatory guidance requires that conversions from LIBOR to SOFR or prime preserve the same APR, influencing how lenders structure conversions and disclosures.
• The current prime rate is 7.00%, and the choice of index should depend on borrower sophistication, operational capacity, and hedging plans.

Table of Contents

• SOFR vs Prime at a Glance
• How Each Rate Actually Gets Set
• What This Means for Pricing and Payments
• Compounding, Timing, and Contract Language That Matter
• Why LIBOR Disappeared and What Regulators Require Now
• Choosing the Right Index for Your Loan
• Our Take on Index Choice in CRE Financing
• How We Help You Navigate SOFR and Prime Financing
• FAQ
• Sources

SOFR vs Prime at a Glance

The two benchmarks diverge on almost every structural point that matters to a lender or borrower setting terms.

A few operational distinctions matter as much as the numbers:

• SOFR requires compounding or averaging since it is an overnight rate, not a term rate.
• Prime resets instantly when banks move it, with no in-arrears calculation needed.
• Fallback language is more contractually dense for SOFR-based loans than for prime-based ones.

How Each Rate Actually Gets Set

SOFR is calculated as a volume-weighted median of overnight repo transactions secured by U.S. Treasury securities, pulling from tri-party repo, General Collateral Finance (GCF) repo, and bilateral Delivery-versus-Payment (DVP) repo segments. The New York Fed publishes the rate daily, and the process includes trimming unusual “special” transactions that would otherwise distort the median.

In 2024, the New York Fed updated its methodology, removing affiliated transactions from certain segments and applying a consistent 20% trim to the DVP segment, a change implemented starting November 25, 2024 to preserve the rate’s robustness.

As of October 2, 2026, the U.S. bank prime loan rate is 7.00%, reported on the Federal Reserve’s H.15 release. Prime is not calculated from transaction data at all. Individual banks post it, and it typically tracks the federal funds target using an industry convention of roughly 300 basis points above that target.

Two mechanics drive most of the practical difference:

• SOFR prints one business day in arrears because it reflects the prior day’s completed repo trades.
• Prime changes only when enough major banks adjust their posted rate, which the Wall Street Journal tracks as a market consensus.

This is why SOFR behaves like a live snapshot of overnight funding costs, while prime behaves like a slower-moving policy signal that banks administer collectively.

What This Means for Pricing and Payments

SOFR’s transactional basis makes it more responsive to repo-market liquidity, which can produce short-lived spikes around quarter-end funding pressure or Treasury settlement events. Prime, by contrast, stays sticky between Federal Reserve moves because banks only reset it when enough of the market agrees to shift together.

Lenders express SOFR-based pricing as a margin over the compounded index, while prime-based pricing is typically a markup stated as “prime plus” a spread. Both structures ultimately need to produce a comparable annual percentage rate (APR) for the borrower, which matters most when a loan is converting from an older index.

A few downstream effects follow directly from these mechanics:

• Borrowers on SOFR-indexed loans may see payment amounts shift more frequently within a billing period than prime borrowers.
• Hedging a SOFR exposure often requires different instruments than hedging a prime exposure, since swap markets are built around SOFR curves.
• Loan servicing systems need to handle compounding calculations for SOFR, which adds operational cost that lenders sometimes fold into wider margins.
• Regulatory guidance requires that any index conversion preserve APR comparability so borrowers are not unfairly disadvantaged.

Pro Tip: When comparing two term sheets priced off different indexes, convert both to an estimated all-in APR before comparing margins, since a lower headline spread on one index can still produce a higher effective rate. (The APR comparability requirement is highlighted by regulatory guidance.)

Compounding, Timing, and Contract Language That Matter

SOFR cannot be billed the way prime can, because it is an overnight rate and loans need a periodic figure. Lenders typically use one of a few approaches to bridge that gap:

1. Compounded-in-arrears: Daily SOFR rates compound over the full accrual period, using 30, 90, or 180-day averages published by the New York Fed.
2. Lookback or observation shift: The loan references SOFR values from several days before the current period, easing the operational burden of same-day calculation.
3. SOFR Index reference: Loans use the published SOFR Index value to derive a compounded rate between two dates without computing daily compounding manually.

Because SOFR publishes one business day in arrears, contract language has to define observation dates precisely, or accrual periods and payment dates can mismatch. Prime carries no such complexity: the posted rate on a given day applies directly, with no lag or averaging convention needed. Fallback provisions in modern loan agreements typically spell out which SOFR variant applies and what happens if publication is disrupted, a level of contractual specificity that older LIBOR-based agreements rarely required.

Why LIBOR Disappeared and What Regulators Require Now

LIBOR was discontinued after revelations that it relied on bank estimates rather than actual transactions, leaving it vulnerable to manipulation. Regulators coordinated on SOFR as the preferred USD replacement precisely because it is grounded in real repo transactions rather than submitted guesses.

The CFPB’s final rule designated SOFR-based indexes and the prime index as acceptable LIBOR replacements, provided lenders can demonstrate the new index and margin produce an APR substantially similar to what the original LIBOR-based terms would have generated. The rule’s core concern is avoiding unfair outcomes for consumers caught in an involuntary index switch.

In practice:

• Consumer products like credit cards and HELOCs have leaned toward prime for its simplicity.
• Commercial products, including CRE loans and floating-rate notes, have leaned toward SOFR for its transparency.

Choosing the Right Index for Your Loan

Picking an index comes down to matching the benchmark’s behavior to the borrower’s capacity and the loan’s complexity.

1. Assess borrower sophistication. Institutional and commercial borrowers can typically absorb SOFR’s compounding mechanics; retail borrowers generally cannot.
2. Weigh operational capacity. Confirm your servicing system can handle compounded averages before committing to a SOFR structure.
3. Check hedging needs. If the borrower or lender plans to hedge the floating exposure, SOFR’s deeper derivatives market is usually the better fit.
4. Review disclosure requirements. Consumer-facing loans carry stricter APR comparability obligations than commercial ones.

Three quick scenarios: an institutional CRE borrower on a construction loan generally fits SOFR with compounded-in-arrears terms; a small-business operating line often works better on prime plus a fixed spread for simplicity; a consumer HELOC or credit card almost always defaults to prime for the same reason.

Pro Tip: Insist on contract language that names the specific SOFR variant, defines the lookback period, and spells out a fallback rate before signing, since vague index language is the most common source of post-closing disputes.

Our Take on Index Choice in CRE Financing

We model both SOFR and prime scenarios side by side on nearly every bridge, construction, and DSCR financing we structure, because the “right” index depends on the deal’s hold period and the sponsor’s appetite for payment variability, not on which index sounds more sophisticated. We advise sponsors to confirm fallback language before closing and to quantify the operational cost of compounding against the pricing benefit SOFR sometimes offers.

— Jerry

How We Help You Navigate SOFR and Prime Financing

We structure and source commercial real estate financing across bridge loans, construction loans, DSCR loans, CMBS, and preferred equity, and index selection is part of every term sheet we negotiate on a sponsor’s behalf.

Our capital stack advisory work includes modeling SOFR versus prime economics against a sponsor’s hold period and cash flow needs, then negotiating margins and fallback clauses directly with lenders.

• We model different benchmarks against a projected hold period before commitment to a structure.
• We negotiate fallback language and margin reset terms with lenders on behalf of sponsors.
• We package deals for lender review so index-related questions are addressed before closing.

If you are structuring a financing where the index choice carries real weight, reach out through our financing solutions page to start the conversation.

FAQ

What is the SOFR rate today?

SOFR is published daily by the New York Fed and reflects the prior business day’s overnight repo transactions, so the current value is available directly from that daily release. Because SOFR moves daily, lenders typically reference compounded 30, 90, or 180-day averages rather than a single day’s print for loan pricing.

What is the difference between a standard interest rate and a prime interest rate?

A standard floating rate is typically built from an index like SOFR plus a negotiated margin, while the prime rate is itself a base rate that banks post and then add their own markup to. The Federal Reserve confirms prime is administered by individual banks rather than set by a transaction-based calculation.

Why is the prime rate so much higher than the fed funds rate?

Prime is conventionally set using an industry practice of adding roughly 300 basis points to the federal funds target rate, which banks use to cover their lending costs and margin. This spread has held as a consistent convention even as the underlying federal funds target has moved.

What is the current prime rate today?

As of October 2, 2026, the U.S. bank prime loan rate is 7.00%, as reported on the Federal Reserve’s H.15 release. The prime rate is set by individual banks and typically moves in step with changes to the federal funds target.

Sources

• Secured Overnight Financing Rate (SOFR) - Federal Reserve Bank of New York
• CFPB: Final rule to facilitate transition from LIBOR