Your fixed rate is ending, your deal looks uncompetitive, or you want to release equity. This guide explains exactly when to act, what to watch out for, and how a whole-of-market broker secures you the best available rate.
A remortgage is the process of switching your existing mortgage to a new deal, either with your current lender or a different one, without moving home. It is one of the most impactful financial decisions a homeowner can make, yet many people miss the window and end up paying significantly more than they need to.
Most residential mortgages in the UK are structured with an initial incentive period, typically a two or five-year fixed rate, or occasionally a tracker. Once that period ends, your lender automatically moves you onto their Standard Variable Rate (SVR). That is where the real cost begins.
Remortgaging allows you to replace that expiring deal with a competitive new rate, potentially saving hundreds of pounds every month. It can also be used to raise capital against the equity in your home, consolidate debt (with care), or move to a more flexible mortgage structure. The key is timing, and knowing your options before your deal expires.
When your initial mortgage deal ends, your lender does not write to warn you that you are about to become substantially more expensive to finance. You simply roll onto their SVR, a rate set at the lender's discretion, usually tracking well above the Bank of England base rate and bearing no relation to the most competitive deals available in the market.
As of 2026, SVRs across major UK lenders typically sit between 7% and 8.5%. Competitive two and five-year fixed rates, by contrast, are available from around 4% to 5% depending on your loan-to-value ratio and circumstances. The gap is substantial.
On a £200,000 outstanding balance over 20 years: at an SVR of 7.5%, your monthly repayment would be approximately £1,608. On a competitive fixed rate of 4.5%, the same balance costs approximately £1,265 per month. That is a difference of £343 every month, or £4,116 per year, purely from failing to switch.
The trap is that many borrowers do not realise they have lapsed onto SVR until they check their statement, or they assume the process of remortgaging is too complex to be worth it. In reality, a straightforward remortgage to a new lender with no additional borrowing can complete in four to six weeks, and the savings typically far outweigh any costs involved.
The golden rule is to start the process six months before your current deal expires. Most mortgage offers are valid for three to six months, meaning you can secure a new rate now and have it ready to activate the moment your existing deal ends, without paying any early repayment charges.
This approach removes the risk of your deal expiring before a new one is in place, gives you time to compare options properly, and insulates you against potential rate rises in the intervening months.
| Situation | When to Act | Notes |
|---|---|---|
| Deal ending in 3–6 months | Start now | Secure a rate and queue the switch |
| Already on SVR | Immediately | Every month on SVR costs you money |
| Deal ending in 7–12 months | Research now, apply at 6 months | Monitor rates; some lenders allow 6-month locks |
| Mid fixed-rate deal | Calculate ERC first | May still be worth it if rates have fallen significantly |
| LTV has improved significantly | Review at next deal end | Lower LTV unlocks better rate tiers |
If you are already on SVR, there is no early repayment charge and no reason to wait. You can switch to a new deal at any time, and the savings begin immediately from completion.
The savings available depend on your outstanding balance, the rate gap between your current deal and the best available, and your remaining mortgage term. The table below illustrates indicative monthly savings across common scenarios, assuming a move from a 7.5% SVR to a 4.5% fixed rate.
| Outstanding Balance | Monthly at 7.5% SVR | Monthly at 4.5% Fixed | Monthly Saving | Annual Saving |
|---|---|---|---|---|
| £100,000 | £805 | £633 | £172 | £2,064 |
| £150,000 | £1,207 | £949 | £258 | £3,096 |
| £200,000 | £1,608 | £1,265 | £343 | £4,116 |
| £300,000 | £2,413 | £1,898 | £515 | £6,180 |
| £400,000 | £3,217 | £2,530 | £687 | £8,244 |
Figures are illustrative, based on a 20-year repayment term. Actual savings will vary. These do not account for any product fees, which should be weighed against the rate offered, sometimes a slightly higher rate with no fee is cheaper overall over a two-year period.
If your home has increased in value since you bought it, or you have paid down a meaningful portion of your original loan, you may have significant equity you can draw on. Remortgaging to release equity means increasing your mortgage balance to access a lump sum, which remains secured against your property.
Common uses include home improvements (kitchen extensions, loft conversions, new bathrooms), consolidating expensive unsecured debt, helping a family member with a deposit, or funding a significant purchase. Because the borrowing is secured and spread over your remaining term, monthly costs are typically much lower than unsecured lending, though the total interest paid over a long term can be higher.
The key considerations are whether your income supports the increased borrowing, what the new loan-to-value ratio will be, and how the equity release interacts with any early repayment charges on your current deal. A broker can model this accurately before you apply.
Consolidating unsecured debt into a mortgage converts short-term debt into long-term secured debt. While monthly payments fall, you may pay significantly more interest over the life of the loan. Think carefully before securing other debts against your home.
Most fixed-rate and tracker mortgage deals carry an early repayment charge (ERC) if you repay the loan or switch lender before the incentive period ends. ERCs are typically expressed as a percentage of the outstanding loan and often reduce over time, for example, 5% in year one, 4% in year two, down to 1% in year five.
On a £250,000 mortgage, a 2% ERC amounts to £5,000. Whether remortgaging early makes financial sense therefore depends on how much you would save in rate over the remaining deal period versus the cost of exiting it.
Multiply your monthly saving from switching by the number of months remaining on your current deal. If that figure is greater than the ERC you would pay, breaking early is mathematically worthwhile, before accounting for any product fees on the new deal.
For example: if you would save £350 per month and have 14 months left on your deal, your gross saving is £4,900. If your ERC is £3,800, you are £1,100 ahead even before the saving continues into the new deal period. A broker can run this calculation precisely for your situation.
If you are within six months of your deal ending, you almost certainly do not need to pay an ERC, you simply apply now and set completion for the day your current deal expires.
A remortgage follows a clear sequence. With a broker managing the process, most straightforward remortgages complete within four to eight weeks from initial application.
The choice of mortgage type is as important as the rate itself. Each structure suits different borrowers at different stages.
Your rate and monthly payment are locked for the incentive period, typically two or five years. This provides certainty and protection against rate rises. It is the most popular choice for borrowers who want predictability, particularly households managing a tight monthly budget. The trade-off is that if rates fall significantly during your fixed period, you will not benefit unless you pay an ERC to exit.
A tracker follows the Bank of England base rate at a set margin, for example, base rate plus 0.75%. If the base rate falls, your payment falls automatically. Trackers typically have no ERC (or a short one), giving you flexibility to switch again quickly if rates move. They suit borrowers who expect rates to fall and can absorb short-term payment increases if they rise.
An offset mortgage links your current account or savings to your mortgage balance. Interest is charged only on the net balance, so £200,000 mortgage with £40,000 in savings means you pay interest on £160,000. This is particularly efficient for higher-rate taxpayers, self-employed borrowers with variable income, or those building up a lump sum. Rates are typically slightly higher than equivalent fixed deals, so the saving depends on how much you hold in offset savings.
For most borrowers remortgaging in 2026, a two or five-year fixed rate offers the best balance of competitiveness and security. A broker will model each option against your circumstances and outlook.
When you remortgage directly with your existing lender, known as a product transfer, you are only seeing one lender's range. Your lender has no incentive to show you what their competitors are offering, and their retention rates are not always their best available.
A whole-of-market broker has access to the full lending market, including exclusive rates not available to borrowers applying directly. They also understand lender criteria in detail, which lenders are most competitive at your LTV band, which accept self-employed income structures, and which are moving most quickly through their processing queues at any given time.
Beyond rate, a broker manages the application, liaises with the lender and solicitor, and handles any complications that arise during underwriting. For a remortgage, there is no property chain and no purchase risk, the process is relatively straightforward, and the broker's value is in finding the best deal and making sure it completes on time.
The Mortgage Consultancy is a whole-of-market broker with over 25 years of experience. We advise on remortgages across London, Kent, and the wider UK. Learn more about our residential mortgage service, or book a call to discuss your remortgage options with an adviser.
Our advisers compare the full market to find the most competitive remortgage deal for your circumstances, at no cost to you.