A mortgage rate lock protects you from interest rate increases during the loan processing period. Understanding rate lock duration options helps you choose the right timeframe and avoid unnecessary costs in Arizona's dynamic mortgage market.
What is a Rate Lock?
A rate lock guarantees your mortgage interest rate for a specific period, typically 30-60 days. During this time, your rate remains unchanged regardless of market fluctuations, protecting you from rising rates while your loan is processed.
Standard Rate Lock Periods
30 Days
Most common for refinances and quick closings
- • No additional cost
- • Best for fast closings
- • Tight timeline
45 Days
Good balance for most purchases
- • Slight rate increase
- • Adequate time buffer
- • Common for purchases
60 Days
Standard for home purchases
- • Moderate rate increase
- • Comfortable timeline
- • Most popular option
90 Days
For new construction or complex transactions
- • Higher rate increase
- • Extended protection
- • New builds
Rate Lock Costs and Pricing
How Rate Lock Pricing Works
Longer rate locks typically cost more because lenders face increased risk from market volatility. The cost is usually expressed as a percentage added to your interest rate or as discount points.
| Lock Period | Rate Adjustment | On $400K Loan (Monthly Impact) |
|---|---|---|
| 30 days | Base rate (0%) | $0/month |
| 45 days | +0.125% | ~$30/month |
| 60 days | +0.25% | ~$60/month |
| 90 days | +0.375-0.5% | ~$90-120/month |
When to Choose Shorter Locks
- ✓ Refinancing (faster process)
- ✓ All documents ready to submit
- ✓ Simple transaction
- ✓ Experienced buyer/seller
- ✓ No appraisal issues expected
- ✓ Want to minimize rate costs
When to Choose Longer Locks
- ✓ New construction homes
- ✓ Complex transactions
- ✓ First-time homebuyers
- ✓ Expecting delays
- ✓ Rising rate environment
- ✓ Peace of mind worth the cost
Float-Down Options
Some lenders offer float-down provisions that allow you to lock in a lower rate if rates decrease during your lock period. Understanding these options can save thousands.
One-Time Float-Down
Cost: 0.125% - 0.25% of loan amount or added to rate
- • Can adjust rate once during lock period
- • Usually requires 0.25% or greater rate drop
- • Common trigger: rates drop significantly
- • May require paying for new lock period
Free Float-Down
Cost: Included with some lenders
- • No upfront cost
- • Usually more restrictive terms
- • May require larger rate drop (0.375%+)
- • Limited time window (e.g., 7-10 days before closing)
Rate Lock Extension
If your loan doesn't close before your rate lock expires, you may need to extend your lock. Extension costs vary by lender and market conditions.
Extension Period
0.125% - 0.25% of loan amount
Extension Period
0.25% - 0.5% of loan amount
Extension Period
May require re-locking at current rates
How to Avoid Lock Extensions
- ✓ Choose appropriate initial lock period
- ✓ Submit complete documentation quickly
- ✓ Respond promptly to lender requests
- ✓ Schedule appraisal immediately
- ✓ Coordinate closing date realistically
- ✓ Build in 7-10 day buffer for unexpected delays
Rate Lock Best Practices
Before Locking
- • Shop multiple lenders first
- • Understand all costs and fees
- • Get rate lock confirmation in writing
- • Know your estimated closing date
- • Understand extension policies
- • Ask about float-down options
After Locking
- • Get written lock confirmation
- • Note expiration date on calendar
- • Submit documents immediately
- • Stay in communication with lender
- • Monitor closing timeline closely
- • Address issues promptly
Common Rate Lock Questions
Can I lock a rate before finding a home?
Generally no. Most lenders require a signed purchase contract with a property address before locking a rate.
What happens if rates drop after I lock?
You're typically locked into your rate unless you have a float-down provision. This protects you from rate increases but doesn't automatically benefit from decreases.
Is a rate lock agreement binding?
Yes, for both parties. The lender must honor the locked rate (if you close within the lock period), and you're committed to that lender.
Can I switch lenders after locking?
Yes, but you'll lose your rate lock and any fees paid. You'd need to start fresh with a new lender at current market rates.
Lock Your Rate with Confidence
Our Arizona mortgage experts will help you choose the optimal rate lock strategy.