Remortgage Savings Calculator UK

UK Remortgage Guide 2024

Why Remortgage?

Common reasons to remortgage: end of fixed-rate deal — standard rates much higher than fixed/tracker deals. Most people remortgage every 2-5 years. Reduce monthly payments. Switch deal type (fixed → tracker or vice versa). Release equity for home improvements. Consolidate debt (carefully — secured against home). Change to interest-only or capital repayment. Add or remove a partner from the mortgage. Best timing: 3-6 months before current deal ends. Mortgage offers valid 6 months — lock in a rate 3-6 months ahead of your current deal ending, so you're never left on the lender's expensive standard variable rate even briefly.

What should I know about Costs of Remortgaging?

Typical remortgage costs: arrangement fee: £0-£2,999. Often £999. Can be added to loan (interest accrues) or paid upfront. Higher arrangement fee deals often offer lower interest rate — calculate breakeven. Valuation: £200-500. Many lenders include free valuation in remortgage deals. Legal fees: £200-500. Many lenders offer 'free legals' (basic remortgage conveyancing). Broker fee: £0-1,500. Fee-free brokers (L&C, Habito) widely available — no need to pay. Mortgage broker often gets paid by the lender directly (a commission), which is why many whole-of-market brokers charge the borrower nothing at all — always ask upfront how a broker is paid.

What's the difference between Product Transfer and Full Remortgage?

Product transfer: switch to a new deal with your current lender. Typically no legal fees, no valuation, simpler paperwork. Lower hassle, but limited choice (only your lender's rates). Often slightly more expensive than market-best. Best when: current lender offers competitive rates. You don't want hassle of remortgaging. You have credit/income concerns that might affect new lender application. Full remortgage: switch to new lender. Access to whole market. Better rates often available — but with more paperwork, a new affordability assessment, and legal/valuation costs that a product transfer avoids entirely.

What should I know about Decision Framework?

Breakeven calculation: total fees / monthly saving = months to breakeven. Under 12 months: definite remortgage. 12-24 months: usually worthwhile if you'll stay in property. 24+ months: marginal — consider product transfer or different deal. Important: remortgaging restarts the term unless you specify otherwise. Keep same term to maintain payment level. Reduce term to keep payment same as before despite lower rate — saves more in interest. Increase term to reduce monthly payment if cash flow is tight, accepting that this increases total interest paid over the life of the loan.

What's the key thing to understand about When Remortgaging Makes Financial Sense?

Remortgaging — moving your mortgage to a new deal, either with your existing lender (a product transfer) or a new one — makes the most financial sense when the interest saved over the new deal period meaningfully exceeds any costs involved in switching. Those costs can include an early repayment charge if you're still within your current deal's fixed or tied-in period, valuation fees, legal fees (though many remortgage deals include free legal work and sometimes a free valuation as an incentive), arrangement or product fees on the new deal, and the time and effort of the application process itself. A simple way to check viability is to compare the total cost of staying on your current deal (or reverting to the lender's standard variable rate, if your deal has ended) against the total cost of the new deal including all fees, over a like-for-like period — not just comparing headline interest rates, since a lower rate with a high arrangement fee can sometimes cost more overall than a slightly higher rate with no fee, especially on smaller mortgage balances. It's generally worth starting to compare remortgage options three to six months before your current deal ends, since most new deals can be secured and locked in ahead of the actual switch date, protecting you from reverting to a lender's standard variable rate even briefly.

What should I know about Remortgaging to Release Equity?

Beyond simply switching to a better rate, remortgaging can also be used to release equity — borrowing more than your current outstanding balance and taking the difference as cash, provided your property's value and loan-to-value ratio allow it. Common reasons include funding home improvements, consolidating higher-interest debts like credit cards or personal loans into the mortgage, or helping family members with a house deposit. While consolidating debt into a mortgage can lower the interest rate on that debt substantially, it's worth being clear-eyed about the trade-off: spreading a credit card balance over a 20- or 25-year mortgage term, even at a lower rate, can mean paying significantly more in total interest over the mortgage's life than paying the same debt off faster at a higher rate over a shorter period, simply because of how much longer the money is borrowed for. It also converts previously unsecured debt into debt secured against your home, meaning missed payments carry the risk of repossession in a way they didn't when the debt was an unsecured credit card. Anyone considering equity release through remortgaging for debt consolidation should compare the total cost over the full mortgage term, not just the change in monthly payment, and consider whether a shorter-term personal loan at a similar or even somewhat higher rate might actually cost less overall.

Worked Example: Is Remortgaging Worth the Early Repayment Charge?

Suppose someone has £220,000 remaining on a mortgage, currently on a fixed rate of 5.5% with 18 months left on the deal, and a new remortgage deal is available at 4.2% fixed. Switching now, however, triggers an Early Repayment Charge (ERC) of 2% of the outstanding balance, or £4,400.

In this specific scenario, paying the ERC to switch early isn't worthwhile over just the remaining 18 months — the upfront charge outweighs the monthly savings within that window. However, if the new 4.2% rate is fixed for, say, 5 years rather than being compared only over the remaining 18 months, the £168-a-month saving (£1,351 − £1,183) adds up to over £10,000 across the following years once the original deal would have ended anyway and reverted to a new rate — so the full comparison needs to weigh the ERC against savings over the entire period the new deal would run, not just the overlap period, and should also factor in what rate might be available when the original deal naturally ends.

Costs to Check Before Remortgaging

The headline interest rate on a new deal is only one part of the comparison — several other costs can materially change whether remortgaging actually saves money.

A remortgage deal advertising the lowest headline rate isn't always the cheapest overall once arrangement fees are included — a slightly higher rate with no fee can sometimes beat a lower rate with a four-figure fee, particularly on smaller mortgage balances where the fee makes up a larger share of the total cost. Always compare total cost over the deal's full term, not just the monthly payment or the headline rate.

Fixed vs Tracker vs Variable Rate When Remortgaging

Choosing a new mortgage product type matters as much as finding the lowest advertised rate, since each type carries a different risk profile. A fixed-rate deal locks in the same rate for a set period (commonly 2, 5, or occasionally 10 years), giving payment certainty regardless of what happens to interest rates during that time — valuable for budgeting but it means missing out if rates fall, and typically carrying an Early Repayment Charge if you want to exit the deal early. A tracker rate moves directly with a reference rate (commonly the Bank of England base rate) plus a fixed margin, meaning payments rise and fall with the wider interest rate environment — potentially cheaper if rates fall or stay low, but exposing the borrower to higher payments if rates rise. A standard variable rate (SVR) is the lender's own default rate that borrowers typically fall onto automatically once a fixed or tracker deal ends, and it's usually the most expensive option, which is exactly why remortgaging before falling onto the SVR (or shopping for a new deal promptly once you do) is usually worthwhile.