DSCR Rate Locks: Lock Periods, Extension Fees, Float-Downs, and What Happens When Your File Slips

A borrower gets a term sheet at 7.875% on a 30-day lock, the appraisal takes eleven days to schedule because the tenant will not answer the phone, the insurance binder needs a wind deductible rewrite, and closing lands on day 38. That eight-day slip is not free. Depending on the lender it costs 12.5 basis points in rate, 0.25 points in fee, or — on the worst desks — a full re-lock at current market with worst-case pricing, which on a rising week can mean 8.25% instead of 7.875%. On a $240,000 loan that is roughly $60 a month for thirty years. Rate lock mechanics are the least glamorous part of a DSCR file and one of the most expensive places to be careless.

What a DSCR rate lock actually is

The lock is a commitment from the lender to deliver a specific note rate and specific price for a specific number of days, contingent on the loan closing as approved. Behind it, the lender is hedging — either by selling forward into a whole-loan trade or by shorting a proxy security against the eventual securitization. That hedge has a cost, and the cost scales with time. This is why a 60-day lock always prices worse than a 30-day lock: the lender is buying more optionality on the borrower's behalf and passing through the carry.

The mechanics trace directly back to the capital markets execution. If you have not read the piece on where DSCR rates come from, it explains why a lender's lock desk behaves less like a bank and more like a trading operation — and why "can you just hold my rate a little longer" is a request with a real dollar cost attached, not a favor.

Standard lock windows and what each one costs

Most DSCR lenders publish a lock grid that looks close to this:

• 15-day lock: best pricing, typically 0.125 points better than 30-day, but only available on files that are already clear-to-close or very near it
• 30-day lock: the baseline. Nearly all rate sheets quote 30-day pricing as the headline number
• 45-day lock: roughly 0.125 to 0.20 points worse than 30-day, or about 5 basis points in rate
• 60-day lock: roughly 0.25 to 0.375 points worse, or 8 to 12 basis points in rate
• 90-day lock: 0.50 to 0.75 points worse, and often only offered on new construction or build-to-rent takeouts

Two things get missed here. First, the lock clock usually starts at lock confirmation, not at application — but a handful of shops start it at submission, which can silently eat a week. Ask. Second, the expiration date is the date the loan must fund, not the date documents are signed. In a state with a mandatory recording gap or a Friday closing that records Monday, that difference is real.

Whether a 30-day window is realistic depends heavily on the market. A tenant-occupied duplex in Cleveland where the appraiser needs interior access to two units and the property manager schedules showings weekly is a 45-day file even if everything else is clean. A vacant single-family in a high-volume market with a lockbox is a legitimate 21-day file.

Extension pricing: the fee you should negotiate before you need it

Every lender has an extension grid, and almost none of them volunteer it at term sheet stage. The market-standard structure runs roughly:

• 7-day extension: 0.125 points
• 15-day extension: 0.25 points
• 30-day extension: 0.375 to 0.50 points

Some shops price extensions in rate instead of fee — 12.5 basis points for 15 days is common. A minority cap total extensions at 30 days cumulative, after which the file must be re-locked at market. And a meaningful number of lenders will grant one courtesy extension of 7 to 10 days at no cost if the delay was caused by the lender's own appraisal vendor or underwriting queue. That courtesy is almost never in writing, and it is almost always available if you ask before the lock expires rather than after.

The single highest-leverage question to ask at term sheet: does the extension fee get charged at par or added to the rate, and is it netted at closing or collected up front? A 0.25-point extension on a $300,000 loan is $750. It belongs in the same mental bucket as the rest of the closing cost stack, not treated as a surprise.

Worst-case re-lock and why an expired lock is worse than a late one

When a lock expires without extension, most DSCR lenders apply worst-case pricing on the re-lock. That means the borrower gets the worse of the original locked rate or current market. If rates fell 20 basis points during the delay, the borrower does not capture the improvement — they get the original rate. If rates rose 30 basis points, they get the higher one. It is asymmetric by design, because it removes any incentive to let a lock lapse strategically.

There is usually also a cooling-off period: 15 to 30 days during which the same borrower and same property cannot be re-locked at improved pricing. Some lenders shorten this to zero for repeat brokers, which is one of the quiet advantages of relationship volume and one of several dimensions worth comparing across the lender directory before committing a file.

The takeaway is procedural. If a lock is going to expire, extend it two or three days before expiration, not on the day. Extension requests filed after expiration are re-locks, and they price like re-locks.

Float-downs: when they exist and what they cost

Float-down provisions are far less common on DSCR than on owner-occupied agency lending, but they do exist. The typical structure gives a one-time option to reprice down if the market improves by more than a threshold — usually 25 basis points — during the lock period. Cost is generally 0.25 to 0.50 points paid at lock, or built in as a slightly worse starting rate.

Three restrictions almost always apply: the option is one-time only, it must be exercised at least 5 to 10 days before funding, and it captures a portion of the improvement rather than all of it, often 50% to 75%. If the market rallies 40 basis points and the float-down captures 50%, the borrower picks up 20 basis points and paid a quarter point for the privilege. Whether that trades well depends entirely on how volatile the window looks. In a flat market it is a wasted quarter point. Ahead of a Fed meeting or a CPI print falling mid-lock, it can be worth several times its cost.

A float-down is not the only way to manage rate risk. Paying discount points buys a certain outcome rather than a conditional one, and for a buy-and-hold investor planning a 7-to-10-year hold, certainty usually wins on a break-even basis.

The DSCR-specific wrinkle: your ratio moves with the rate

This is the part that separates DSCR locks from conventional locks. The qualifying ratio is calculated off the note rate, so a rate change is not just a payment change — it is a qualification event.

Take a $260,000 loan at 75% LTV with $4,100 in monthly rent. At 7.875% the principal and interest is roughly $1,885, and adding $310 in taxes, $145 in insurance, and $45 in HOA puts PITIA near $2,385 for a DSCR of 1.72. Push the rate to 8.375% on a worst-case re-lock and P&I moves to about $1,977, PITIA to $2,477, and DSCR to 1.66. On a strong file that is cosmetic. On a file that locked at 1.03 against a 1.00 program floor, a 50-basis-point re-lock drops the ratio to roughly 0.99 and the loan no longer qualifies at the approved LTV — the borrower now needs to bring cash to reduce leverage or move to a no-ratio program at worse pricing.

Thin-ratio files therefore need shorter locks and tighter timelines, or a deliberate buffer. Running the numbers at 25 and 50 basis points above the locked rate before you commit is a two-minute exercise with the DSCR calculators, and it tells you exactly how much rate movement the file can absorb before the structure breaks.

Market-level factors that make lock timing harder

Lock discipline is not purely a lender question. Insurance is now the dominant cause of closing delays in coastal and wind-exposed markets, and a binder that needs to be rewritten because the deductible structure fails lender guidelines routinely adds 7 to 14 days. Investors buying in Tampa and across the rest of Florida should build that into the lock length from day one rather than extending later at 0.25 points.

Title is the second most common cause, particularly on properties acquired at auction or through tax sale, where a curative period of two to four weeks is normal. Entity documentation is third: a newly formed LLC in a state with slow filing turnaround can hold a file for a week waiting on a certificate of good standing, which is worth planning around when you set up entity vesting at the front of the transaction rather than the back.

A practical lock checklist

Before you lock, confirm five things in writing: the exact expiration date and whether it is a funding date or a signing date; the extension grid in points or basis points; whether worst-case re-lock applies and how long the cooling-off period runs; whether a float-down is offered and at what threshold; and whether the lock survives a change in loan amount, LTV, or program. That last one matters more than people expect — a mid-process LTV change from 80% to 75% after a low appraisal is technically a new lock at many shops, and if it is treated that way, current market applies.

The correct lock length is the honest one. A 30-day lock on a file that realistically needs 45 days is not a savings of 0.125 points; it is a 0.25-point extension fee with extra steps.