Home › Mortgage Calculator › Remortgage Calculator

UK Remortgage Calculator & Savings Comparison

Calculate your potential monthly and annual savings by switching to a new mortgage deal. Compare your current lender interest rate or SVR against new fixed-rate offers, and factor in arrangement fees to find your true net saving.

Compare Your Remortgage Deal

Amount left to repay on your existing mortgage.
Number of years left on your repayment term.
Your current fixed rate or Standard Variable Rate (SVR).
The new fixed or tracker rate offered by lenders.
Duration of the new promotional interest rate.
Arrangement or booking fee (typically £999, or £0 for fee-free deals).
Monthly Payment Saving
£261 / month
Total net saving of £14,661 over your 5-year fixed deal (after fees)
Current Monthly Payment
£1,491
New Monthly Payment
£1,230
Annual Payment Saving
£3,132 / yr
Total Fee-Adjusted Saving
£14,661

Frequently Asked Questions About Remortgaging in the UK

When should I start looking for a new remortgage deal?

Most UK mortgage lenders allow you to reserve a new mortgage rate up to 6 months before your current deal expires. This allows you to lock in a competitive rate while having peace of mind that you can switch penalty-free as soon as your existing deal concludes.

What is an SVR and why should I avoid it?

A Standard Variable Rate (SVR) is the default rate your mortgage reverts to when your promotional fixed or tracker deal ends. SVRs are typically between 7.0% and 8.5%—substantially higher than fixed deals. Rolling onto an SVR can add hundreds of pounds to your monthly payment.

Is it better to choose a fee-free deal or a deal with a product fee?

It depends on your loan balance. A £999 arrangement fee is usually worth paying on mortgages over £150,000 if the interest rate is at least 0.3% to 0.4% lower. For smaller loan balances (under £100,000), a fee-free product with a slightly higher rate often costs less overall.

Regulatory Disclaimer: UKStampDuty.co.uk is an independent information website. We do not provide financial advice or mortgage brokerage services. Mortgage rates and repayment terms vary depending on individual credit score, loan-to-value (LTV) ratio, and lender criteria. Consult an FCA-authorised mortgage broker before making financial decisions.