Free guide · Updated July 2026 · 6 min read
Remortgaging: when, why, and how not to waste the window
The short answer
Start looking at remortgage options six months before your current fix or deal ends. Letting it lapse onto your lender's standard variable rate (SVR) typically costs £200 to £400 extra per month. A product transfer with your current lender is the easiest route; a broker or direct comparison is the way to check you are not leaving money on the table. The process takes 4 to 8 weeks and you can lock a rate up to 6 months ahead.
Why it matters (the SVR trap)
When your fixed or tracker deal ends, your lender automatically moves you onto their standard variable rate, which is currently 7 to 8.5 percent at most high-street lenders. On a £200,000 mortgage, the difference between a 4.5 percent fix and a 7.5 percent SVR is roughly £350 per month. That is not a rounding error; it is a holiday, a car payment, or a year of childcare.
The trap works because the end of a deal feels like nothing: no letter, no alarm, just a quietly larger direct debit that most people notice three months later. The Renewal Radar inside House Chapter exists to break that silence six months early.
The six-month timeline
| When | What to do |
|---|---|
| 6 months before | Check your current deal's end date. Log into your lender or check your mortgage statement. Start comparing rates |
| 5 months before | Decide: product transfer (same lender, minimal paperwork) or full remortgage (new lender, new valuation, new legal work). Get a broker's view if your case has any complexity |
| 4 months before | Apply. Most lenders let you lock a rate 3 to 6 months ahead, so you can secure today's rate while your current deal runs out |
| 2 months before | Chase the application if you've not had an offer. Solicitor should be working on the legal transfer if switching lenders |
| Deal end date | New rate starts. If you're cutting it fine, phone your lender and ask for a rate hold or temporary extension |
Product transfer vs full remortgage
| Product transfer | Full remortgage | |
|---|---|---|
| What it is | Switching to a new deal with the same lender | Moving your mortgage to a different lender |
| Effort | Online or one phone call; often no valuation, no solicitor | Full application, valuation, legal work |
| Cost | Usually £0 (no fees, no valuation, no legal) | £0 to £1,500 (many lenders offer free legals and valuations as incentives) |
| Speed | Days to a week | 4 to 8 weeks |
| When it wins | Your lender's retention rate is competitive and your circumstances haven't changed | Another lender's rate is significantly better, or your equity has grown enough to access a lower LTV band |
When a broker earns their fee on a remortgage
For a straightforward product transfer, you probably don't need a broker. But if any of these apply, a broker's market view saves more than their fee.
- ✓Your income has changed (self-employed, new job, reduced hours): lenders' affordability models differ wildly
- ✓You want to borrow more (for renovations, debt consolidation): the amount you can add varies by lender
- ✓Your property value has risen enough to cross an LTV threshold (e.g. 85% down to 75%): lower LTV means lower rates, and a broker knows which lenders will accept your valuation
- ✓Your current lender's retention rates are not competitive: you won't know without comparing, and a broker compares for a living
Early repayment charges: the one number to check
If you are still within a fixed or tracker deal (not at the end of it), breaking early triggers an early repayment charge, typically 1 to 5 percent of the outstanding loan. On a £200,000 mortgage, that is £2,000 to £10,000. Sometimes it's worth paying to escape to a much lower rate; usually it's not. Run the maths: monthly saving times remaining months must exceed the ERC for it to make sense.
Quick answers
When should I start thinking about remortgaging?
Six months before your current deal ends. Most lenders allow you to lock a new rate 3 to 6 months ahead, which means you can secure today's rate while your current deal runs out. Starting at six months gives you time to compare without rushing.
Does remortgaging cost anything?
A product transfer with your existing lender is usually free. A full remortgage to a new lender can involve a product fee (£0 to £1,000, often added to the loan), a valuation fee (frequently waived as an incentive), and legal costs (again, often free via the lender's panel solicitor). Compare the total cost, not just the rate.
Can I remortgage to release equity for home improvements?
Yes, most lenders allow further borrowing on a remortgage, subject to affordability and LTV limits. The rate may be higher on the additional borrowing. A broker can advise on which lenders are most generous for capital raising and whether the numbers make sense compared to a separate loan.
Put this guide to work
General information for England & Wales, not financial or legal advice. Costs are typical 2026 ranges and vary by region and circumstances.