When and How to Remortgage: A Strategic Guide

Remortgaging—switching your mortgage to a new deal—is one of the most effective ways to reduce your monthly payments and total interest costs. This guide explains when and how to remortgage strategically.

What Is Remortgaging?

Remortgaging means replacing your current mortgage with a new one. You can:

• Stay with your current lender (product transfer)
• Switch to a new lender (full remortgage)

Either way, you're moving from your current deal to a different one, ideally with better terms.

When Should You Remortgage?

Your Fixed Rate Is Ending

The most common remortgage trigger. When your fixed or tracker deal ends, you'll move to your lender's SVR—typically 2-3% higher. Remortgaging before this happens saves significant money.

Example: On a £200,000 mortgage, moving from 4.5% to 7% SVR adds £350/month to your payments.

Rates Have Dropped Significantly

If market rates have fallen substantially since you took your mortgage, breaking your current deal (even with ERCs) might save money overall.

Your LTV Has Improved

As you pay down your mortgage and property values rise, you move into better LTV bands. A remortgage unlocks these improved rates.

Original Position	After 2 Years	Rate Improvement
90% LTV	85% LTV	~0.2-0.3%
85% LTV	80% LTV	~0.2-0.4%
80% LTV	75% LTV	~0.3-0.5%

You Want to Borrow More

Remortgaging can release equity for home improvements, debt consolidation, or other purposes. However, consider whether this is wise—you're extending debt secured against your home.

Your Circumstances Have Changed

Income increases, improved credit score, or changed employment status might qualify you for better deals than before.

When Remortgaging Might Not Make Sense

Early Repayment Charges

If you're mid-way through a fixed deal, ERCs can be substantial:

Remaining Fix	Typical ERC	On £200,000
4 years	4%	£8,000
3 years	3%	£6,000
2 years	2%	£4,000
1 year	1%	£2,000

Calculate whether savings exceed the ERC before breaking your deal.

Your Circumstances Have Worsened

If your income has dropped, credit score declined, or you're now self-employed, you might not qualify for better deals than you currently have.

Small Balance Remaining

With a small mortgage balance, the fees involved in remortgaging may outweigh potential savings.

You're Planning to Move Soon

Remortgage fees are only worthwhile if you'll benefit from the new rate long enough to recoup them.

The Remortgage Process

1. Start Early (3-6 Months Before)

Most lenders let you lock in a rate 3-6 months before your current deal ends. This gives you:

• Time to compare options
• Protection if rates rise
• A secured rate without early commitment

2. Gather Your Documents

You'll typically need:

• Recent payslips (3 months)
• Bank statements (3 months)
• P60 or tax returns
• Proof of address
• Current mortgage statement

3. Compare Your Options

Check:

• Your current lender's product transfer rates
• Whole market rates via comparison sites
• Broker-exclusive deals

4. Calculate True Costs

Don't just compare headline rates. Consider:

Cost Factor	Range
Arrangement fee	£0-£2,000
Valuation fee	Often free, or £150-£300
Legal fees	Often free on remortgage, or £300-£500
Exit fee (old lender)	£50-£300

5. Apply and Complete

Once you've chosen:

1. Submit full application
2. Lender arranges valuation
3. Legal work completes (often minimal for remortgage)
4. New mortgage starts, old one is paid off

Product Transfer vs Full Remortgage

Product Transfer

Pros:

• Simple, often done online
• No valuation or legal work
• No credit check in most cases
• Can be completed in days

Cons:

• Limited to your lender's rates
• Miss potentially better deals elsewhere
• No opportunity to release equity

Full Remortgage

Pros:

• Access to entire market
• Can find significantly better rates
• Opportunity to release equity
• Switch to a better lender

Cons:

• More paperwork
• Takes 4-8 weeks typically
• Credit check required
• May need valuation

Strategic Remortgaging Tips

Use Rate Locks Wisely

In a rising rate environment, lock early. In falling markets, wait longer but have a deadline.

Consider Fixing Longer

If you're concerned about rate rises and plan to stay put, longer fixes provide extended protection—even if they cost slightly more.

Improve Your LTV First

If you're close to a threshold (like 82% LTV), consider whether a lump sum overpayment before remortgaging could push you to 80% and unlock better rates.

Don't Forget to Renegotiate

Before accepting your lender's product transfer offer, call and ask if they can improve it. Retention teams often have discretion.

Review Annually

Even if you're mid-fix, keep an eye on rates. Knowing the market helps you plan your next move.

Remortgage Checklist

Use this checklist when your deal is ending:

• Check when current deal ends
• Note any early repayment charges
• Calculate current LTV
• Check credit score
• Request product transfer rates from current lender
• Get whole-market comparison (broker or comparison site)
• Calculate total costs over new deal period
• Factor in any equity release needs
• Apply 3-6 months before deal ends
• Set reminders for next review

Summary

Remortgaging strategically can save thousands over the life of your mortgage. Start looking 3-6 months before your current deal ends, compare product transfers with full remortgages, and always calculate total costs rather than comparing headline rates alone. Don't let inertia push you onto an expensive SVR when better options are available.

For details on fees you might encounter, see our mortgage fees explained guide.