Rate Lock is an agreement with your lender to secure a specific interest rate before your loan settles, protecting you from rate increases during the approval and settlement period. Most rate locks are valid for 60-120 days and are particularly valuable in rising rate environments.
How Rate Locks Work
After pre-approval (or sometimes at formal approval), you can lock in today's interest rate for your settlement, even if it's 60-90 days away.
Standard process:
- Receive loan pre-approval
- Request rate lock (usually free)
- Lender confirms locked rate (in writing)
- Rate is guaranteed for 60-120 days
- Loan settles at locked rate (regardless of market movements)
Example:
- January 15: Pre-approved for $650,000 @ 5.89%
- January 20: Request rate lock @ 5.89%
- March 1: Lender increases rates to 6.19%
- March 15: Your loan settles @ 5.89% (saved 0.3%)
- Annual saving: $1,950/year on $650,000 loan
When to Use Rate Locks
1. Rising Rate Environment
Protect against expected rate increases.
Example:
- Reserve Bank signals rate rises coming
- You're 60 days from settlement
- Current rate: 6.09%
- Expect rates to rise 0.5% over next 2 months
- Lock in 6.09% today
Outcome:
- Rates rise to 6.59% before settlement
- Your loan settles @ 6.09%
- Save: 0.5% = $3,250/year on $650,000 loan
2. Buying Off-the-Plan (Long Settlement)
Off-the-plan settlements are 12-24 months away.
Example:
- Buy apartment off-the-plan: $720,000
- Settlement: 18 months
- Today's rate: 5.79%
- Lock rate for maximum period (usually 120 days before settlement)
- 14 months later (120 days before settlement): Rates are 6.59%
- Lock rate @ 6.59% (can't lock earlier, but still protected from further rises)
Can't lock 18 months ahead, but lock as early as lender allows (90-120 days).
3. Volatile Market Conditions
When economic uncertainty creates rate volatility.
Example:
- Inflation rising rapidly
- Reserve Bank unpredictable
- Rates could move 0.5% either direction
- You're 45 days from settlement
- Lock in current rate for certainty (even if not expecting rises)
4. Tight Budget (Can't Afford Rate Rise)
When you're borrowing at maximum capacity.
Example:
- Borrowing capacity: $700,000 @ 6.1% = $4,260/month (affordable)
- Rate rises to 6.5% before settlement = $4,470/month (tight)
- Lock 6.1% to ensure budget works
Rate Lock Terms
Validity Period
How long is the rate locked?
Typical terms:
- Major banks: 90 days (3 months)
- Some lenders: 60 days (2 months)
- Premium products: 120 days (4 months)
Example:
- Lock rate: January 15
- 90-day expiry: April 15
- Must settle by April 15 or rate lock expires
If settlement delayed beyond lock period:
- Rate lock expires
- Current market rate applies
- May be higher or lower than locked rate
Extension Options
Some lenders allow one extension (30-60 days).
Example:
- Original lock: 90 days, expires April 15
- Settlement delayed (building delays)
- Request extension: Additional 30 days to May 15
- Lender approves (often only one extension permitted)
Extension fees:
- Usually: $0 (free, one time)
- Some lenders: $150-$300 fee
Cancellation and Re-Lock
What if rates fall after you lock?
Example:
- January 15: Lock @ 5.89%
- February 10: Rates drop to 5.59%
- You want lower rate
- Request cancellation and re-lock @ 5.59%
Lender policies vary:
- Most major banks: Allowed (free, unlimited)
- Some lenders: Allowed once
- Few lenders: Not allowed (locked rate is fixed)
Always ask: "Can I re-lock if rates fall?"
Rate Lock vs No Lock
Rate Lock
Pros:
- Certainty (know your rate and repayment amount)
- Protected from rate rises
- Can budget accurately
- Peace of mind
Cons:
- Can't benefit from rate falls (unless can re-lock)
- May feel "locked in" if rates drop significantly
Example:
- Lock @ 6.09%
- Rates rise to 6.39%: Good decision (save $1,950/year)
- Rates fall to 5.79%: Poor decision (pay $1,950/year extra)
No Lock (Floating)
Pros:
- Benefit from rate falls
- Flexibility
Cons:
- Exposed to rate rises
- Uncertainty (can't budget precisely)
- Stress monitoring rates daily
Example:
- Don't lock @ 6.09%
- Rates fall to 5.79%: Good decision (save $1,950/year)
- Rates rise to 6.39%: Poor decision (pay $1,950/year extra)
Rate Lock Costs and Fees
Free Rate Locks (Most Common)
Major banks typically offer free rate locks:
- Commonwealth Bank: Free, 90 days
- Westpac: Free, 90 days
- NAB: Free, 90 days
- ANZ: Free, 90 days
No cost, standard service.
Paid Rate Locks (Rare)
Some specialty lenders charge:
- Rate lock fee: $200-$500
- Longer lock periods: $300-$800
Example:
- Lender charges: $350 for 120-day rate lock
- Rate saving: 0.4% on $680,000 = $2,720/year
- Worth paying $350 for $2,720 annual benefit
Re-Lock Fees
Some lenders charge to re-lock if rates fall:
- First re-lock: Free
- Subsequent re-locks: $150-$250 each
Example:
- Lock @ 6.09%
- Rates fall to 5.89%, re-lock free
- Rates fall to 5.69%, re-lock costs $200
- Annual saving: $2,600, worth paying $200
What Rates Can Be Locked?
Variable Rates
Most rate locks are for variable rates.
Example:
- Today's variable rate: 6.09%
- Lock for 90 days
- Settle at locked 6.09% variable rate
- After settlement: Rate can vary (lock only applies until settlement)
Fixed Rates
Can lock fixed rates too (double protection).
Example:
- Today's 3-year fixed: 5.79%
- Lock this rate for 90 days
- Rates rise to 6.29% before settlement
- Settle at 5.79% fixed for 3 years
- Protected from rises until settlement AND for 3 years after
Most conservative strategy in rising rate environment.
Split Loans
Can lock both portions.
Example:
- Total loan: $700,000
- Split: $400K fixed @ 5.69%, $300K variable @ 6.09%
- Lock both rates for 90 days
- Settle with both rates locked
Risks and Downsides of Rate Locks
1. Rates Fall (Opportunity Cost)
Locked rate may be higher than settlement rate.
Example:
- Lock @ 6.19%
- 60 days later: Rates fall to 5.69% (0.5% lower)
- Locked into higher rate
- Cost: $3,250/year on $650,000 loan
Mitigation: Choose lenders allowing free re-locks.
2. Settlement Delays Beyond Lock Period
Building delays, contract issues.
Example:
- Lock rate for 90 days (expires June 1)
- Builder delays 6 weeks (settle July 15)
- Rate lock expired June 1
- Rates rose 0.4% since then
- No longer protected
Mitigation: Request extension (if available) or re-lock closer to new settlement date.
3. False Sense of Security
Locked rate isn't guaranteed until formal approval.
Example:
- Pre-approval with rate lock
- At formal approval: LVR changed (property valued lower)
- Lender requires LMI
- Rate offered is 0.3% higher (different product)
- Original lock doesn't apply
Mitigation: Get formal approval before locking rate.
4. Can't Always Lock Immediately
Some lenders require contract signed first.
Example:
- Get pre-approval
- Want to lock rate
- Lender policy: "Can't lock until contract exchanged"
- 3 weeks to find property and exchange
- Rates rise 0.3% during search
- Can't lock early
Mitigation: Ask lender's lock policy during pre-approval.
Rate Lock Strategies
1. Lock Early in Rising Environment
As soon as you have pre-approval.
Example:
- Reserve Bank signals 0.75% of rate rises coming
- Get pre-approval @ 5.89%
- Lock immediately (even though no contract yet)
- 60 days later: Rates at 6.39%
- Locked in before rises
2. Float in Falling/Stable Environment
Don't lock if rates likely to fall or stay flat.
Example:
- Inflation falling
- Reserve Bank on hold or likely to cut rates
- Don't lock @ 6.09%
- 90 days later: Rates at 5.79%
- Saved 0.3% = $1,950/year on $650,000 loan
3. Lock Only Part of Loan
Lock portion, float portion (hedge your bets).
Example:
- Loan: $700,000
- Lock: $400,000 @ 6.09% (protection from rises)
- Float: $300,000 (benefit from falls)
If rates rise 0.4%:
- Locked: $400K still @ 6.09%
- Floated: $300K @ 6.49%
- Average: 6.26% (better than 6.49% on full loan)
If rates fall 0.4%:
- Locked: $400K still @ 6.09%
- Floated: $300K @ 5.69%
- Average: 5.92% (worse than 5.69%, but better than 6.09%)
4. Use Re-Lock Option Aggressively
Monitor rates daily, re-lock if they fall.
Example:
- Initial lock: 6.09%
- Week 1: Rates drop to 5.99%, re-lock
- Week 4: Rates drop to 5.89%, re-lock
- Week 7: Rates rise to 6.09%, keep 5.89% lock
- Saved 0.2% = $1,300/year via active management
Real-World Rate Lock Scenarios
Example 1: Successful Rate Lock (Rising Rates)
Timeline:
- January 10: Pre-approved $650,000 @ 5.89%
- January 15: Lock rate for 90 days
- February 5: RBA raises rates 0.25%
- March 1: Lender passes on rise, rates now 6.14%
- March 25: RBA raises another 0.25%
- April 10: Lender rates now 6.39%
- April 15: Settle at locked 5.89%
Outcome:
- Avoided 0.5% rate rise
- Annual saving: $3,250 on $650,000 loan
- Excellent decision
Example 2: Rate Lock with Re-Lock (Falling Rates)
Timeline:
- June 1: Pre-approved $720,000 @ 6.29%
- June 5: Lock rate for 90 days (can re-lock if rates fall)
- July 12: Rates drop to 6.09%, re-lock (free)
- August 3: Rates drop to 5.89%, re-lock (free)
- September 1: Rates stable at 5.89%
- September 10: Settle at 5.89%
Outcome:
- Started at 6.29%, settled at 5.89%
- Saved 0.4% = $2,880/year
- Free re-locks allowed downside capture
Example 3: Rate Lock Backfires (Rates Fell, No Re-Lock)
Timeline:
- March 1: Pre-approved $600,000 @ 6.19%
- March 5: Lock rate for 90 days (lender doesn't allow re-locks)
- April 15: Inflation data drops, rates fall to 5.89%
- May 20: Rates fall further to 5.69%
- May 30: Settle at locked 6.19% (rates are 0.5% lower)
Outcome:
- Locked into higher rate
- Pay extra 0.5% = $3,000/year
- Poor outcome (but avoided risk of rates rising)
Example 4: Settlement Delay Expires Lock
Timeline:
- January 15: Lock rate 5.89% for 90 days (expires April 15)
- February 28: Building delays announced (4 weeks)
- March 15: Request extension, lender grants 30 days (expires May 15)
- April 20: Further delays (settle June 5)
- May 15: Lock expires
- June 5: Settle at current rate 6.29% (lock doesn't apply)
Outcome:
- Delays caused lock expiry
- Rates rose 0.4% = $2,600/year extra cost
- Unavoidable (building delays)
Rate Lock Checklist
Before requesting rate lock, confirm:
- Lock duration: 60, 90, or 120 days?
- Extensions: Allowed? How many? Cost?
- Re-lock policy: Can you re-lock if rates fall? Cost?
- Trigger point: When can you lock (pre-approval, formal approval, contract exchange)?
- Cancellation: Can you cancel lock if circumstances change?
- Written confirmation: Always get lock in writing (email or letter)
Example written confirmation:
"We confirm your interest rate of 5.89% p.a. (variable) on loan amount $650,000 is locked until April 15, 2025. You may re-lock to a lower rate if available, free of charge, up until settlement."
Final Thoughts
Rate locks are valuable protection tools in rising or volatile rate environments—they provide certainty, protect against increases, and are usually free.
When to lock:
- Rising rate environment (RBA signaling increases)
- Volatile economic conditions
- Tight budget (can't absorb rate rises)
- Long settlement period (60-120 days)
When to float (don't lock):
- Falling rate environment
- Stable rates expected
- Lender allows free re-locks (best of both worlds)
- Short settlement period (under 30 days)
Best practices:
- Choose lenders with free re-lock options
- Lock as early as allowed (if expecting rises)
- Monitor rates if you can re-lock (capture falls)
- Request written confirmation of locked rate
- Build in buffer (don't rely on last-minute extension)
Typical rate lock outcome:
Rising rates:
- Lock @ 5.89%
- Rates rise to 6.29% by settlement
- Save: 0.4% = $2,600/year on $650,000 loan
Falling rates (with re-lock):
- Lock @ 6.09%
- Rates fall to 5.79%, re-lock
- Save: 0.3% = $1,950/year via re-lock
Falling rates (no re-lock):
- Lock @ 6.09%
- Rates fall to 5.79%, stuck at lock
- Cost: 0.3% = $1,950/year (opportunity cost)
Speak to a NIK Finance broker about rate lock options across 100+ lenders—some offer more flexible re-lock policies than others, giving you protection from rises while still capturing falls.
Rate locks are free insurance against rising rates—in uncertain times, use them. In stable/falling markets, floating may be better. Choose based on your risk tolerance and rate outlook.