When to Remortgage — How to Time Your Deal for Maximum Savings

The Cost of Getting Remortgage Timing Wrong

Missing your remortgage window is expensive. When a fixed-rate mortgage expires, the loan automatically reverts to the lender's Standard Variable Rate (SVR) — a rate set unilaterally by the lender, currently averaging around 7–8% for most major lenders in 2026. For a £200,000 mortgage, the difference between a competitive 4.5% five-year fix and an 8% SVR is approximately £550 per month. Every month you spend on the SVR is real money lost.

Use our [remortgage savings calculator](/remortgage-calculator) to estimate how much you could save by switching to a competitive new deal.

How Long Can You Lock In a Rate in Advance?

Most lenders and mortgage brokers allow you to secure a new remortgage rate **three to six months before your current deal expires**. Some lenders extend this to six months, and a small number to twelve months.

This advance window is valuable because:

• You are not under pressure to accept any deal — if rates fall further before completion, you can often switch to a better rate with the same lender
• You are protected against rate rises in the period between application and completion
• You give yourself time to shop the whole market without rushing

The Optimal Remortgage Timeline

**Six months before deal expiry:**

• Begin researching rates
• Consult a whole-of-market broker to understand the current market
• Note whether rates are trending up, down, or flat — this influences whether to lock in immediately or wait

**Four to five months before deal expiry:**

• Apply for the new mortgage (standard residential remortgage applications take four to eight weeks to complete)
• Many brokers recommend applying at this point to give maximum processing time

**Three months before deal expiry:**

• Application should be well advanced; valuation and legal work underway

**On or just before deal expiry:**

• New deal completes; seamless transition with no gap on SVR
• If anything has caused a delay, the brief SVR period is minimised

**Day of deal expiry:**

• If nothing is in place, you move to SVR immediately — the urgency of having a deal lined up is real

Product Transfers: The Faster Option

A product transfer is switching to a new deal with your **existing lender** rather than remortgaging to a different lender. It is faster, requires less documentation (no new affordability assessment in most cases), and typically has no legal or valuation fees.

However:

• You are restricted to your current lender's product range
• Rates may not be as competitive as the whole market
• If your LTV has improved substantially, a new lender may recognise that more favourably

Product transfers can typically be arranged even further in advance than full remortgages — some lenders allow rate locking up to nine months ahead. A broker can compare the best product transfer rate from your existing lender against the best remortgage rate from the market and advise which is better value.

Should You Switch Lenders or Stay?

**Reasons to switch:**

• Your existing lender's best rate is not competitive
• Your LTV has improved significantly (e.g., from 85% to 70%) and a new lender recognises that better
• You want to increase your borrowing and your existing lender will not facilitate it
• You are consolidating debt or making other structural changes that require a new application

**Reasons to stay:**

• Product transfer rate matches or beats the market
• Costs of switching (legal fees, potential valuation) erode the rate benefit
• Convenience and speed — product transfer can complete in weeks; full remortgage takes months

A broker will run the comparison for you: the monthly saving from the lower rate versus the cost and time of switching.

Timing Around Interest Rate Expectations

In 2026, Bank of England base rate has moderated from its 5.25% peak but remains elevated by pre-2022 standards. Mortgage rate expectations are broadly range-bound, with markets pricing gradual further easing over the medium term.

This creates a genuine timing question: lock in now or wait for potentially lower rates?

**Arguments for locking in now:**

• Rate forecasts are notoriously unreliable — locking in a known rate removes uncertainty
• If rates rise rather than fall, you are protected
• Most lenders allow a rate switch-down within the offer period for no fee or a modest fee — so locking in now does not mean missing a better rate if one materialises

**Arguments for waiting:**

• If you are genuinely confident rates will fall meaningfully before your deal expires, waiting could save money
• But "meaningful" means more than 0.1–0.2% — the certainty premium of locking in has real value

Most advisers recommend locking in once you are within four to five months of expiry, accepting that some uncertainty remains, because the cost of ending up on SVR far outweighs the potential benefit of a slightly lower rate from waiting.

What About Remortgaging Mid-Fixed-Rate?

Remortgaging before your current fixed-rate deal expires incurs the full ERC. Whether this makes sense depends on how much rates have changed since you fixed.

**When early remortgage may be worthwhile:**

• Rates have fallen by 1%+ since you fixed, and the ERC cost is recovered within 18–24 months of lower payments on the new deal
• Your circumstances have changed substantially (e.g., you need to release equity, your LTV has improved dramatically)

Run the break-even calculation: ERC cost ÷ monthly saving on the new rate = months to break even. If the break-even is shorter than the remaining term of the new deal, it is worth considering.

Use our [remortgage savings calculator](/remortgage-calculator) to model both scenarios — waiting until expiry versus remortgaging now — and establish the financial impact of your timing decision.