Definition
A rate lock is an agreement between a borrower and lender that guarantees a specific interest rate for a defined period of time. During the lock period, the borrower is protected from market-driven rate increases before the loan closes.
Why Rate Locks Matter
Interest rates can move daily based on bond markets, inflation data, and central bank policy. A rate lock reduces uncertainty between loan approval and closing, allowing borrowers and investors to underwrite with more confidence.
How a Rate Lock Works
- Lock request: borrower (often through a loan officer) requests a rate lock.
- Lock confirmation: lender issues a lock agreement stating the rate, points, and expiration date.
- Lock period: typically 15, 30, 45, 60 days (longer for construction or complex deals).
- Closing deadline: loan must close before the lock expires to preserve the rate.
Common Lock Periods
Lock length depends on transaction complexity and expected closing timeline:
- 15–30 days: standard residential closings with strong underwriting.
- 45–60 days: purchases with extended diligence or commercial underwriting.
- Long-term locks: construction or rate lock programs that may involve upfront fees.
Lock Extensions
If closing is delayed beyond the expiration date, borrowers may need to:
- Pay an extension fee (often a per-day or per-week cost).
- Relock at current market rates, which could be higher or lower.
Extension pricing can materially affect loan economics, especially in volatile rate environments.
Float-Down Options
Some lenders offer a float-down feature, allowing the borrower to reduce the locked rate if market rates fall significantly before closing. These options:
- May require an upfront fee.
- Often have specific triggers (e.g., minimum rate drop).
- Are not universally available.
Commercial vs. Residential Differences
- Residential loans: rate locks are common and standardized.
- Commercial loans: locks may occur later in underwriting and can involve deposits or breakage costs.
- Agency loans (multifamily): often include formal rate lock commitments tied to underwriting milestones.
Example
An investor secures a 30-day rate lock at 6.50% for a refinance. Two weeks later, market rates rise to 6.90%.
Because the rate was locked, the investor closes at 6.50%, preserving projected debt service and maintaining underwriting assumptions.
Common Pitfalls
- Locking too early: delays in appraisal or underwriting may require costly extensions.
- Locking too late: rates may rise unexpectedly before protection is in place.
- Ignoring expiration date: missed deadlines can reset pricing.
- Not reading lock terms: some locks are conditional on appraisal value or final underwriting.
- Assuming float-down is automatic: many locks do not allow downward adjustments.
Why It Matters for Investors
- Protects underwriting assumptions tied to debt service and DSCR.
- Reduces closing risk in volatile rate environments.
- Stabilizes projected returns when modeling cash flow and refinance timing.