On a $400,000 30-year fixed loan, a 6.75% rate produces principal and interest of about $2,594 per month. At 6.50%, that payment is about $2,528 – a $66 monthly difference. If the lower rate costs one point, or $4,000, the five-year payment savings equal $3,960 ($66 × 60), so the point has not quite broken even by month 60. That is why rate locks should never be evaluated by the rate alone. The lock period, lender credits, points, closing timeline, and likelihood of an extension all affect the actual cost.
Byline: Duane Buziak, NMLS #1110647
Table of Contents
- What a mortgage rate lock covers
- Lock versus float: the practical decision
- Points, credits, and break-even math
- How broker rate shopping changes the comparison
- Lock periods, extensions, and relocks
- Program-specific pricing differences
- Total Cost of Ownership worksheet
- Frequently asked questions
What rate locks actually protect
A mortgage rate lock is the lender’s written commitment to honor a defined interest rate, points or lender credits, and loan program terms for a stated period, assuming the file remains materially unchanged. It is not a promise that every closing-cost line will stay fixed. Prepaid interest, homeowners insurance, escrow deposits, property taxes, and some third-party charges can still move.
A lock also does not protect a borrower who changes the loan amount, occupancy, property type, credit profile, or program after locking. A new appraisal can alter loan-to-value ratio. A pay-off balance can change a refinance amount. Those changes can require repricing, even when the borrower locked in good faith.
For a live market reference, use the weekly Freddie Mac Primary Mortgage Market Survey and its historical companion on FRED. Those series show broad market direction, not the exact price for your credit score, loan purpose, property, and lock term. A quoted rate is only useful when it also identifies points or credits and the date it can be locked.
Lock or float? Start with your deadline
Locking transfers most near-term rate risk from you to the broker/lender. Floating preserves the possibility of lower pricing before closing, but leaves you exposed if bond-market pricing worsens. Neither choice is automatically right.
A borrower with a signed contract, a 21- to 30-day closing target, and a payment that already fits may reasonably value certainty more than chasing another eighth of a point. A borrower still gathering income documents, choosing between homes, or several months from completion has less reason to pay for a long lock before there is a financeable property and a complete file.
The Federal Reserve’s policy rate influences mortgage markets, but it does not set 30-year mortgage pricing directly. Mortgage-backed securities, inflation expectations, Treasury yields, and lender capacity all matter. That is why a headline about the Fed does not guarantee that a rate quote improves that afternoon. Compare mortgage rates today based on same-day pricing, not last week’s headline.
Points, credits, and the par-rate question
Par rate means the rate available with neither discount points nor lender credits under a specific investor’s pricing. It is not universally the lowest rate and it is not a single rate shared by all borrowers. A 760 FICO conventional borrower may see a different par rate from a 680 FICO borrower, even with the same down payment and house price.
Discount points are prepaid interest. One point equals 1% of the loan amount. Lender credits work in the opposite direction: accepting a higher rate can offset some closing costs. For a buyer short on cash, a credit can be more useful than a lower rate that requires thousands at closing. For a long-term owner with funds available, points may make sense after a documented break-even review.
Use the $400,000 example above carefully. The payment gap between 6.75% and 6.50% is roughly $66, but taxes, insurance, and mortgage insurance are separate. If a borrower expects to sell or refinance within four years, paying $4,000 for that lower rate is usually difficult to justify on payment savings alone. If the point cost is lower, the rate spread larger, or the ownership horizon longer, the math changes.
Why a broker/lender comparison is different
One retail lender’s rate sheet can be a legitimate offer, but it is one shelf. A rate shopping mortgage broker can compare eligible pricing across hundreds of wholesale lenders, then use in-house or correspondent capability where appropriate. The goal is not to promise a universal lowest rate. It is to compare equivalent scenarios: same lock period, loan amount, FICO tier, occupancy, program, points, lender credit, and estimated cash to close.
| Comparison point | Broker/lender rate shopping | Single-shelf pricing |
|---|---|---|
| Investor access | Can review eligible pricing from hundreds of wholesale lenders | Uses that lender’s available programs and rate sheet |
| Points and credits | Can compare par, discount-point, and lender-credit structures side by side | May offer multiple options, but within one pricing channel |
| FICO and risk tiers | Can identify when another investor prices a credit or LTV tier more favorably | Applies its own tier adjustments |
| Lock flexibility | Can compare lock lengths, extension fees, and relock policies before selection | Uses its published lock policy |
| Program fit | Can contrast conventional, FHA, VA, jumbo, DSCR, and non-QM execution | Limited to its program menu and overlays |
Dare to Compare. Ask each source for a Loan Estimate or written scenario showing rate, points, lender credits, lock expiration, and total lender fees. A lower advertised note rate can cost more if it requires more points, has a shorter lock, or creates an extension problem.
GrandRates.com uses a NoTouch Credit Pull for soft-pull prequalification, designed to protect credit while you narrow the payment range and compare viable programs. A NoTouch Credit Pull is not a final approval, and a full application may still require verification and a mortgage credit report. It does, however, let many shoppers begin without a hard inquiry.
Lock length can cost more than the rate
Common lock periods are 15, 30, 45, and 60 days. Longer locks commonly carry a price cost because the lender is protecting pricing for more time. The better value depends on the transaction. A clean conventional purchase with appraisal and underwriting moving quickly may fit a 30-day lock. A construction-to-permanent loan, renovation financing, or a file with complex self-employed income can require more time.
Extension fees are often charged as a percentage of the loan balance or as a pricing adjustment. On a $400,000 loan, even a 0.125% extension cost equals $500. Before locking, ask what happens if appraisal, title, insurance, condo review, or underwriting delays closing. Also ask whether a float-down option exists, what triggers it, and whether it requires a market improvement threshold.
Program pricing is not interchangeable
Conventional financing generally rewards stronger credit, lower debt, and lower loan-to-value. The Federal Housing Finance Agency publishes annual conforming loan limits; check the current FHFA conforming loan limit data before assuming a loan is conforming. As a reference point, the 2025 baseline limit was $806,500, with higher limits in designated high-cost areas.
FHA can be useful when credit or down payment is the constraint, but mortgage insurance and county loan limits matter. HUD publishes current FHA mortgage limits. VA pricing can be highly competitive for eligible veterans, but funding-fee treatment, residual income, entitlement, and lender overlays still matter. VA program details should be verified through VA.gov.
DSCR, bank statement, and other non-QM loans typically price differently because repayment analysis and documentation differ from agency conventional standards. A DSCR investor may be evaluated on property cash flow, reserve requirements, credit, leverage, and property type. Reserves can range from several months of housing payments to more depending on the investor and scenario. Do not compare a DSCR quote to an owner-occupied conventional quote as if they were the same product.
Build the payment, then lock the loan
A meaningful Total Cost of Ownership worksheet includes more than principal and interest. For the 6.50% $400,000 example, use $2,528 monthly principal and interest, then add property tax, insurance, mortgage insurance if applicable, and HOA dues where relevant. In Fairfax County, Virginia, property tax is based on assessed value and the current rate published by the Fairfax County Department of Tax Administration.
For illustration only, a $500,000 assessed home at a $1.125 per $100 tax rate creates annual tax of $5,625, or $469 monthly. Add $150 monthly homeowners insurance and $180 monthly PMI, and the estimated total is $3,327 per month before HOA dues: $2,528 + $469 + $150 + $180. This is why rate shopping must include the whole housing payment, not a bare principal-and-interest figure.
A NoTouch Credit Pull can help establish a starting point before you choose a lock. Then compare documented options on the same day, with the same assumptions, and lock only after the payment, cash-to-close, and contingency timeline make sense.
Frequently asked questions about rate locks
What is a mortgage rate lock?
A rate lock commits the broker/lender to a stated rate, points or credits, and term through an expiration date, subject to unchanged loan details and conditions.
How long should a rate lock be?
Choose a period that realistically covers appraisal, title, underwriting, and closing. A shorter lock may price better, while a longer lock can reduce extension risk.
Can I lock a rate before finding a home?
Usually, purchase locks are tied to a specific property and completed loan scenario. Early prequalification can estimate pricing, but it is not the same as a final property-specific lock.
Does locking a rate hurt my credit?
A lock itself does not create a credit score change. GrandRates.com can begin with a NoTouch Credit Pull, though final underwriting may require a full credit report.
Can I get a lower rate after I lock?
Only if the selected broker/lender offers a float-down or relock policy and its conditions are met. Ask about that policy before locking.
Is one discount point always worth it?
No. Divide the point cost by the monthly principal-and-interest savings to estimate break-even months, then compare that horizon with your expected ownership period.
Are FHA versus conventional rates directly comparable?
Not by note rate alone. FHA mortgage insurance, conventional PMI, down payment, credit tier, and closing costs can change the lower total-cost option.
Do VA loans have rate locks?
Yes. VA purchase and refinance loans can be locked, but the quote should include funding-fee treatment, eligibility assumptions, and the lock expiration date.
Is GrandRates.com legit for mortgage rate comparison?
GrandRates.com is connected to Coast2Coast Mortgage, NMLS #376205, and provides rate-comparison and prequalification support. Verify every offer with written loan terms before committing.
Is Duane Buziak a mortgage broker or a mortgage lender?
Duane Buziak is a mortgage broker/lender operating through Coast2Coast Mortgage. Depending on the program and state, the transaction may use wholesale broker, in-house, or correspondent execution.
Legal disclaimer
Rates, APRs, points, credits, payments, fees, and program guidelines change without notice and depend on credit, income, assets, loan-to-value, occupancy, property type, loan amount, documentation, and lock period. Payment illustrations exclude items unless specifically stated and are not a loan approval or commitment to lend. Borrowers should review official Loan Estimates, disclosures, and final loan documents before proceeding. Equal Housing Opportunity. Coast2Coast Mortgage, NMLS #376205. Licensing and program availability vary by state.
The right lock is the one that protects a payment you can afford while leaving no surprise in the cash-to-close calculation. Compare equivalent written scenarios, protect your credit early, and make the decision from the numbers rather than a headline.
Duane Buziak, Mortgage Maestro | NMLS: 1110647 | Licensed in VA · FL · TN · GA | UWM PRO ELITE 2025 | UWM Top 20 Purchase LO Virginia 2025 | UWM Speed to Close Industry Leading 2025 | Scotsman Guide Top Originator 2025 & 2026 | VA Broker of the Year 2024-2025 | Top 1% Nationwide | Coast2Coast Mortgage | DuaneBuziakMortgageMaestro.com | duane@coast2coastml.com | (804) 212-8663
