UK Remortgage Calculators 2025
Calculate potential savings from remortgaging your property. Compare your current mortgage with new deals, including all fees and costs, to see if switching will save you money. Updated for October 2025 UK market rates.
Your Current Mortgage
Enter details about your existing mortgage
When to Consider Remortgaging
- End of Fixed Rate: Your current deal is coming to an end
- Better Rates Available: Market rates have fallen significantly
- Improved Circumstances: Better credit score or higher income
- Property Value Increase: Lower LTV ratio qualifies for better rates
- Change Requirements: Need to borrow more or change terms
- Poor Service: Issues with current lender's service
Remortgaging Considerations
- Early Repayment Charges: Check if you'll face penalties
- Property Valuation: Current value affects available rates
- Credit Score: Must maintain good credit for best deals
- Income Changes: Affordability assessed against current income
- Market Timing: Consider future rate predictions
- Total Costs: Factor in all fees, not just monthly savings
Complete Guide to Remortgaging in the UK (2025)
Remortgaging can save you thousands of pounds per year. Understanding the process, costs, and optimal timing helps you make the right decision for your financial situation.
What is Remortgaging?
Remortgaging means switching your existing mortgage to a new deal, either with your current lender (product transfer) or a different lender. Most UK homeowners remortgage every 2-5 years to secure better rates and avoid expensive Standard Variable Rates (SVR).
Why Do People Remortgage?
- Save Money: Secure a lower interest rate (typical savings: £100-£300/month)
- Avoid SVR: Escape expensive standard variable rates (typically 2-3% higher than fixed rates)
- Release Equity: Borrow additional funds for home improvements or debt consolidation
- Change Terms: Adjust mortgage term to reduce monthly payments or pay off faster
- Better LTV: Property value increase or mortgage paydown unlocks better rates
- Switch Product: Move from variable to fixed rate (or vice versa) based on market conditions
Critical Fact: When your fixed-rate deal ends, you automatically move to your lender's SVR, which is typically 2-3% higher than new fixed rates. On a £200,000 mortgage, this means paying an extra £300-£450 per month (£18,000-£27,000 over 5 years)!
Remortgage Costs: What to Expect (2025)
Understanding all costs helps you calculate true savings. Here's a complete breakdown of typical remortgage expenses:
Money-Saving Tip: Many lenders offer free valuations and free legal work to attract remortgage customers. Some also offer cashback (£250-£1,000). Always compare the total cost including fees, not just the interest rate!
When to Remortgage: Optimal Timing Guide
Timing is crucial for maximizing savings and avoiding expensive SVR periods. Here's your complete timing guide:
Best Time: 3-6 Months Before Deal Ends
This is the optimal window for remortgaging. Here's why:
- Avoid SVR: Complete process before reverting to expensive standard rates
- No Rush: Time to research deals, compare offers, and negotiate
- Rate Lock: Secure current rates even if they rise before completion
- No ERC: Most lenders waive early repayment charges in final 3 months
- Smooth Transition: New mortgage starts exactly when old one ends
Good Time: When Rates Drop Significantly
If market rates drop by 0.5% or more below your current rate, calculate if savings outweigh any early repayment charges. Example: £200,000 mortgage, 0.5% rate drop = £83/month savings (£1,000/year). If ERC is £2,000, you break even in 2 years.
Good Time: Property Value Increases
If your property value has increased significantly (10%+), your LTV ratio improves, unlocking better rates. Example: £300,000 property → £330,000 (+10%), with £240,000 mortgage = 80% LTV → 73% LTV. This can reduce rates by 0.3-0.5%, saving £60-£100/month.
Bad Time: Mid-Fixed Period with High ERC
Avoid remortgaging in the first 1-2 years of a fixed deal when ERCs are highest (typically 3-5% of loan). On a £250,000 mortgage, a 5% ERC is £12,500 - rarely worth paying unless rates have dropped dramatically (2%+).
6 Steps to a Successful Remortgage
Follow this proven process to maximize savings and avoid common pitfalls
Check Your Current Deal End Date
Review your mortgage offer letter or contact your lender. Note any early repayment charges and when they expire. Set a reminder for 6 months before your deal ends.
Get Your Property Valued
Use online tools (Zoopla, Rightmove) for estimates. Your LTV ratio determines available rates. If your property value has increased, you'll access better deals. Consider a professional valuation if values have risen significantly.
Compare Deals (Use a Broker!)
Mortgage brokers access exclusive deals not available directly. They compare 100+ lenders in minutes and handle paperwork. Most are free (lender-paid). Compare: interest rate, fees, cashback, free valuations/legal work, and total cost over your intended period.
Gather Required Documents
You'll need: 3 months' payslips, 3 months' bank statements, proof of ID (passport/driving licence), proof of address (utility bill), latest mortgage statement. Self-employed? Add 2-3 years' accounts/tax returns. Having documents ready speeds up the process.
Submit Application & Complete Checks
Lender conducts credit check, affordability assessment, and property valuation. This takes 2-4 weeks. Respond quickly to any queries. Avoid applying for other credit during this period as it affects your credit score.
Complete Legal Work & Switch
Solicitor handles legal transfer (1-2 weeks). Once complete, your new mortgage starts and old one is paid off. Set up new direct debit for monthly payments. Total process: 4-8 weeks from application to completion.
Frequently Asked Questions
Common questions about remortgaging
When is the best time to remortgage?
The best time to remortgage is typically 3-6 months before your current deal ends. This gives you time to research options and complete the process without reverting to your lender's higher standard variable rate. Also consider remortgaging if rates have dropped significantly or your circumstances have improved.
How much does remortgaging cost?
Typical remortgaging costs include arrangement fees (£0-£2,000), valuation fees (£150-£500), legal fees (£300-£800), and potentially early repayment charges. Total costs often range from £500-£3,000, but many lenders offer free valuations and legal work to attract customers.
Can I remortgage to borrow more money?
Yes, this is called a "remortgage with additional borrowing." You can typically borrow up to 80-90% of your property's current value, minus your existing mortgage balance. The extra funds can be used for home improvements, debt consolidation, or other purposes, but consider the increased monthly payments.
What if my property value has decreased?
If your property value has fallen, your loan-to-value ratio increases, which may limit your remortgaging options and result in higher interest rates. You might need to make an additional payment to reduce the mortgage balance, or you may need to wait until property values recover or you've paid down more of the mortgage.
How long does the remortgaging process take?
The remortgaging process typically takes 4-8 weeks from application to completion. This includes time for the lender's valuation (1-2 weeks), mortgage offer (1-2 weeks), and legal work (1-2 weeks). Simple remortgages with the same lender (product transfers) might be faster (2-4 weeks), while complex cases or busy periods might take longer. Start the process 3-6 months before your deal ends to avoid delays and SVR rates.
Should I use a mortgage broker for remortgaging?
Yes, using a mortgage broker is highly recommended for remortgaging. Brokers access exclusive deals not available directly to consumers, compare 100+ lenders in minutes, and handle all paperwork. Most brokers are free (paid by lenders), and they can save you thousands by finding the best deal for your circumstances. They also increase approval chances by matching you with suitable lenders and presenting your application professionally.
What is a product transfer and is it better than remortgaging?
A product transfer is switching to a new deal with your existing lender without changing lenders. Advantages: faster (2-4 weeks), no valuation or legal fees, no credit check (usually), and no early repayment charges. Disadvantages: limited to your current lender's deals, which may not be the most competitive. Always compare your lender's product transfer rates with the wider market - you might save £50-£150/month by switching lenders, even after fees.
How much can I save by remortgaging?
Savings vary based on your current rate and new rate. Typical scenarios: (1) Moving from SVR (6-7%) to fixed rate (4-5%) on £200,000 mortgage = £200-£300/month (£12,000-£18,000 over 5 years), (2) Switching from 5% to 4% fixed rate on £250,000 mortgage = £140/month (£8,400 over 5 years), (3) Improving LTV from 85% to 75% might save 0.3-0.5% = £60-£100/month. Use our calculator to see your exact savings including all fees.
What credit score do I need to remortgage?
Most lenders require a credit score of 650+ (Experian) or 380+ (Equifax) for standard remortgage deals. Scores of 750+ (Experian) or 420+ (Equifax) unlock the best rates. If your score has improved since your original mortgage, you'll access better deals. If it's declined, you might face higher rates or need a specialist lender. Check your credit report 3-6 months before remortgaging and fix any errors. Avoid new credit applications in the 3 months before applying.
Can I remortgage if I'm self-employed?
Yes, self-employed remortgaging is common, but you'll need 2-3 years' accounts or tax returns (SA302 forms). Lenders typically average your last 2 years' net profit to calculate affordability. Some lenders accept 1 year's accounts if you have a strong credit history. Contractor? Some lenders use day rate × weeks worked. Self-employed applicants often benefit from using a broker who knows which lenders are self-employed-friendly and can present your income in the best light.
What happens if I don't remortgage when my deal ends?
If you don't remortgage when your fixed-rate deal ends, you automatically move to your lender's Standard Variable Rate (SVR). SVRs are typically 2-3% higher than new fixed rates. On a £200,000 mortgage, this means paying £300-£450 more per month - that's £18,000-£27,000 extra over 5 years! SVRs can also change at any time, making budgeting difficult. Always remortgage 3-6 months before your deal ends to avoid expensive SVR rates.
Can I remortgage to release equity for home improvements?
Yes, remortgaging to release equity is very common. You can typically borrow up to 80-90% of your property's current value, minus your existing mortgage balance. Example: £300,000 property, £180,000 mortgage remaining, 80% LTV = £240,000 available (£60,000 equity release). The extra funds can be used for home improvements, debt consolidation, or other purposes. However, you'll pay interest on the additional borrowing, and monthly payments will increase. Ensure the improvements add value to your property.
Is it worth remortgaging for a 0.5% rate reduction?
Usually yes, especially if you're near the end of your fixed term (no early repayment charges). On a £200,000 mortgage, a 0.5% rate reduction saves approximately £60/month (£720/year). If remortgage costs are £1,500, you break even in 2 years and save £1,800+ over a 5-year fixed term. However, if you're mid-term with a 3% early repayment charge (£6,000 on £200,000), you'd need to stay on the new rate for 8+ years to break even - rarely worth it unless rates have dropped dramatically (1.5%+).
Do I need a new survey when remortgaging?
The lender will require a valuation to confirm your property's current value, but this is typically a basic desktop or drive-by valuation (£150-£300), not a full structural survey. Many lenders offer free valuations as part of their remortgage package. If you're staying with the same lender (product transfer), they often waive the valuation entirely. You don't need a homebuyer's survey or full structural survey unless you're planning major works or suspect structural issues - these are optional and cost £400-£1,500+.