The SVR gap — why remortgaging matters more in 2026
When a fixed-rate mortgage deal expires, the borrower automatically rolls onto the lender's Standard Variable Rate unless they actively remortgage. In 2026, the gap between the SVR and the best available fixed rates is at a historically wide level — making inaction unusually costly.
| Outstanding mortgage | Monthly cost at SVR (~8%) | Monthly cost at best 5yr fix (~4.2%) | Monthly saving | Annual saving |
|---|---|---|---|---|
| £150,000 | ~£1,155 | ~£793 | ~£362 | ~£4,344 |
| £200,000 | ~£1,540 | ~£1,057 | ~£483 | ~£5,796 |
| £250,000 | ~£1,924 | ~£1,321 | ~£603 | ~£7,236 |
| £300,000 | ~£2,309 | ~£1,585 | ~£724 | ~£8,688 |
| £350,000 | ~£2,694 | ~£1,849 | ~£845 | ~£10,140 |
| £400,000 | ~£3,079 | ~£2,113 | ~£966 | ~£11,592 |
Indicative figures. SVR assumed at 8%; best 5yr fix at 4.2%; 20-year remaining term. Actual rates vary by lender and borrower profile. Use the savings calculator for your specific numbers.
The Bank of England cut rates from 5.25% to 3.75% through 2024–25. Fixed mortgage rates follow swap rates — market expectations of future base rates — and fell accordingly. SVRs, however, are set by each lender at their discretion and tend to adjust more slowly and less fully than fixed rates. The result: a homeowner who rolled onto their lender's SVR when their 2-year fix expired in 2024 is now paying significantly more than a new borrower fixing today. The best course of action for almost every SVR borrower in 2026 is immediate remortgage.
Remortgage calculators
Two calculators do the core work of any remortgage decision: the savings calculator (is it worth switching?) and the overpayment calculator (what impact does paying down the balance have?).
When to start the remortgage process
Timing is the most important practical decision in remortgaging. Acting too late means rolling onto the SVR; acting too early may mean paying an Early Repayment Charge. The right window is typically 3–6 months before your deal ends.
Check what products are available at your current LTV. Many lenders allow you to lock in a rate 6 months ahead — if rates rise before you complete, you're protected; if they fall, you can often switch to a better deal before completion.
Your current lender may offer a product transfer (rate switch with no legal work or valuation). Compare their best retention rate against the open market. Use the savings calculator to see the net difference after switching costs.
Savings calculator →Full remortgage typically takes 4–8 weeks from application to completion. Submitting 3 months before deal expiry gives a comfortable buffer. You'll need: 3 months' payslips, latest P60, 3 months' bank statements, and your current mortgage statement.
The new lender arranges a valuation. A solicitor or conveyancer handles the legal transfer — many lenders offer free legal work as a switching incentive.
If the remortgage is timed correctly, the new deal starts the day your current deal ends. No SVR exposure, no gap in cover.
Full remortgage guide →Every month on the SVR at 7.5–8.5% costs hundreds of pounds more than a competitive fixed rate. Unlike a deal with an ERC, there is no financial penalty for leaving the SVR at any time. If your fixed rate has already expired, the optimal action is immediate: request a product transfer from your current lender today (can often be done online in minutes), then spend the next few weeks comparing whether the open market offers a better deal.
Product transfer vs full remortgage
A product transfer (also called a rate switch) means staying with your current lender but moving to a new deal. A full remortgage means switching to a different lender entirely. Both have merit — the right choice depends on your lender's retention rates versus the open market.
The first step is always to request your current lender's best retention rate — then use the remortgage savings calculator to determine whether the open market, after all switching costs, genuinely saves more. In many cases the difference is modest enough that a product transfer (instant, free, frictionless) is the rational choice. In others — particularly where a significant rate improvement is available — the effort of switching pays back in months.
Leaving early — Early Repayment Charges explained
If your fixed-rate deal hasn't expired yet, you can still remortgage — but your lender will typically charge an Early Repayment Charge. Whether early exit makes financial sense depends on the ERC amount versus the monthly saving you'd achieve.
The second scenario — someone locked into a high 2023-era rate — is common in early 2026. The break-even of 12 months means the decision to exit early and pay the ERC pays for itself within a year, then delivers the saving for the remaining duration of the new deal. Always use the remortgage savings calculator to check your specific ERC and monthly saving before acting.
Remortgaging to release equity
If your property has increased in value since you bought it, remortgaging can release some of that equity as cash — for home improvements, debt consolidation, a deposit on an investment property, or other purposes.
Using a remortgage to consolidate unsecured debt (credit cards, personal loans) converts short-term debt into long-term secured debt against your home. While the monthly payment falls, you may pay significantly more total interest over a 20–25-year mortgage term than you would clearing the original debt more quickly. Always model the total cost over the full mortgage term, not just the monthly saving, before consolidating unsecured debt into a remortgage.
Overpaying vs remortgaging — which makes more sense?
If you have spare cash, the question of whether to overpay your current mortgage or use it as a deposit when remortgaging has meaningful financial implications. These two tools work together — the overpayment calculator helps you decide.
Overpaying before remortgage is most valuable when it moves you across a Loan-to-Value threshold — for example, from 81% LTV to 79% LTV, accessing the 80% LTV product tier. Rate differences between LTV tiers can be 0.1–0.3%, which over a 5-year fix on a £200,000 balance represents a meaningful saving. Before completing your remortgage, check whether a lump sum overpayment would reduce your LTV enough to access a significantly better rate — then use the savings calculator to quantify whether the overpayment cost is justified by the rate saving.
How to remortgage — the complete guide
Everything you need to know about the remortgage process — from gathering documents to completion.
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