Rate Locks on a DSCR Loan: How They Actually Work
A rate lock freezes your quoted interest rate for a set number of days — commonly 15, 30, 45, or 60 — while your loan moves through underwriting to closing. If closing happens inside that window, the rate holds regardless of market movement; if it doesn't, the lock can expire.
NightYield Editorial
STR-DSCR research & underwriting desk
Published 2026-07-14
What a lock actually freezes, and for how long
When you lock, the lender commits to a specific interest rate (and typically a specific point/fee structure) for a defined number of days, starting from the lock date. Common windows are 15, 30, 45, or 60 days, with longer windows usually priced slightly higher since the lender is holding market risk longer on your behalf.
Locking doesn't happen automatically at application — it's typically a separate step you or your loan officer trigger once you're ready to commit to a specific rate, and the clock starts from that trigger date, not from when you first got a quote.
What happens when a lock expires before closing
- Extension: many lenders offer a lock extension for a fee (often a fraction of a point per extra day or week), keeping the original rate alive a bit longer.
- Relock at market: without an extension, the loan may need to relock at whatever the current market rate is — which could be higher or lower than the original lock.
- Float-down option: some programs offer a one-time float-down if rates drop meaningfully after locking, though this is a specific optional feature, not a standard part of every lock.
This is exactly why the realistic closing timeline matters before choosing a lock window — a 15-day lock quoted at a slightly better rate isn't a bargain if the appraisal alone typically takes longer than that. See how long a DSCR loan actually takes to close for the stage-by-stage breakdown.
Choosing a lock window that matches your actual timeline
The safest approach is to lock for a window slightly longer than your loan officer's realistic closing estimate, not the fastest-case scenario — a few extra days of lock cost is usually cheaper than an extension fee or a relock at a worse rate.
Key takeaways
- A rate lock freezes your rate for a defined window — commonly 15 to 60 days — starting from the lock date.
- If closing slips past the lock window, you may face an extension fee or a relock at current market pricing.
- Longer lock windows typically cost slightly more upfront but reduce the risk of expiration.
- Choose a lock window based on the realistic timeline, including appraisal and title, not the best-case estimate.