Remortgaging is the closest thing British personal finance has to free money: millions of homeowners sit on their lender's expensive standard variable rate when switching could save them hundreds a month. Yet many never do, deterred by paperwork, jargon and the suspicion that the savings are not real. Usually, they are very real.
This guide covers what to know before you remortgage: when to start, how to compare deals honestly, the fees that eat savings, and the mistakes that turn a good switch into a bad one.
When to Start: The Six-Month Rule
Start looking six months before your current deal ends. Most lenders let you lock in a new rate three to six months ahead, so you secure today's rates while keeping the option to take a better one if rates fall before completion. This removes the deadline panic that leads to bad decisions.
Also remortgage when your loan-to-value band improves. If price growth or repayments have pushed you from 85 per cent to 75 per cent LTV, you unlock meaningfully better rates. And review whenever your circumstances change: a rate rise on the horizon, a growing family needing payment flexibility, or a desire to overpay or borrow more. Never drift onto the standard variable rate without checking: SVRs currently sit 2 to 4 per cent above the best fixed deals, costing the average borrower thousands a year.
Comparing Deals: The True Cost Method
Headline rates lie. A 4.1 per cent deal with a £1,495 fee can be worse than a 4.3 per cent deal with no fee, depending on your loan size and term. The honest comparison is total cost over the deal period: monthly payments times months, plus fees, minus any cashback or incentives.
Run the numbers for your specific mortgage. On a £200,000 loan over two years, a £1,000 fee needs roughly a 0.25 per cent rate advantage to break even; on £100,000, it needs 0.5 per cent. Comparison sites show true-cost rankings, but a whole-of-market broker does this maths for your exact situation and knows which lenders are flexible on valuations and criteria. MoneyHelper offers free, impartial guidance on the process.
Fees and Features: The Fine Print That Matters
Map every cost: arrangement fees, valuation fees, legal fees for the conveyancing, though many remortgage deals include free legals and valuations, and early repayment charges on your current deal, which can be 1 to 5 per cent of the balance and dwarf any saving if you switch mid-term. Also check for exit fees and deeds release charges.
Then weigh features against your plans. Overpayment allowances, typically 10 per cent a year without penalty, matter if you expect bonuses or want to clear the debt faster. Offset facilities suit savers. Portability matters if you might move. Flexibility to borrow more later suits extenders. The cheapest deal with the wrong features is not the best deal for you. And check the small print on revert rates: what you fall onto if you do nothing next time.
The Mistakes That Wipe Out the Savings
Mistake one: extending the term to cut monthly payments without noticing. Stretching 20 remaining years to 30 slashes the payment but adds tens of thousands in total interest. If you extend for affordability, plan to overpay or shorten later. Mistake two: borrowing more without a purpose, since consolidating debts into the mortgage can make sense but often just converts short-term debt into 25 years of interest.
Mistake three: ignoring your credit file. Check it months before applying and fix errors, since a surprise default can torpedo the best-laid switch. Mistake four: applying to multiple lenders scattergun, since hard searches in quick succession can look desperate; a broker sequences applications properly. Mistake five: focusing only on rate while your LTV band, term and features quietly cost more. the Financial Conduct Authority regulates mortgage advice, so ensure any adviser is authorised.
Alternatives Worth Considering
A product transfer with your existing lender is often the path of least resistance: no valuation, no legal work, sometimes exclusive rates, completable in weeks. The catch is you never see the wider market, so always benchmark the offer against whole-of-market deals before accepting. Lenders count on inertia; reward the ones who earn your business.
Also consider whether remortgaging is the moment for bigger moves: fixing for longer if you value certainty, switching to offset if your savings earn less than your mortgage costs, or borrowing more for adding value to your home before selling-style improvements that genuinely add value, or energy upgrades like the best smart thermostat for a UK home that cut bills. And use the breathing room wisely: if the switch saves £200 a month, directing half into overpayments clears the debt years early.
Product Transfers: The Quick Alternative
A product transfer, switching to a new deal with your existing lender, is remortgaging's overlooked sibling. The advantages are real: no valuation in most cases, no legal work, no affordability reassessment in many cases, and completion in weeks rather than months. For straightforward borrowers whose circumstances have not changed, it is the path of least resistance, and lenders often reserve competitive retention rates for it.
The catch is the lack of market visibility. Your lender's retention offer might be good, or it might rely on your inertia; you cannot know without comparing. The smart play is to get the product transfer quote first, then benchmark it against whole-of-market deals through a broker or comparison sites on a true-cost basis. If the transfer is within a few hundred pounds of the best alternative over the deal period, take it for the simplicity. If the gap is thousands, switch properly. Also note that product transfers can usually be arranged up to six months before your deal ends, so the early-bird strategy applies here too. Loyalty in mortgages is a strategy, not a virtue; reward the lender that earns it.
Key Takeaways
Start remortgaging six months before your deal ends to lock in rates early, and compare true costs over the deal period, not headline rates: a £1,495 fee needs roughly 0.25 per cent rate advantage on a £200,000 loan to break even. Map every fee, check early repayment charges on your current deal, and weigh features like overpayment allowances against your plans. Never drift onto the standard variable rate without checking, and benchmark product-transfer offers against the whole market. Avoid extending the term blindly and scattergun applications; a broker sequences the switch properly.
Remortgaging well means starting six months early, comparing true costs over the deal period rather than headline rates, mapping every fee and feature against your plans, and avoiding the term-extension and scattergun-application traps. Do it right and the savings are substantial and recurring. Do nothing and the standard variable rate quietly takes thousands. The paperwork is a few hours; the payoff lasts years.
Frequently Asked Questions
When should I start looking to remortgage?
Six months before your current deal ends. Most lenders let you secure a rate 3 to 6 months ahead, protecting you if rates rise while keeping flexibility if they fall.
Is it better to remortgage or do a product transfer?
Compare both. Product transfers are faster with no legal work, but you never see the wider market. Always benchmark your lender's offer against whole-of-market deals before accepting.
How much does remortgaging cost in fees?
Many deals include free valuation and legal work. Watch for arrangement fees of £999 to £1,495 and early repayment charges on your current deal of 1 to 5 per cent, which can wipe out savings if you switch mid-term.
Should I extend my mortgage term when remortgaging?
Only with eyes open. Extending cuts monthly payments but adds substantial total interest. If you extend for affordability, plan to overpay or shorten the term later when circumstances allow.
