Remortgaging Explained (UK)

For most homeowners, a mortgage is not a single decision made once and forgotten. Mortgage deals typically last only a few years before reverting to a more expensive rate, which means that, every so often, you face a choice: do nothing and drift onto a higher rate, or actively switch to a new deal. That switch is called remortgaging, and getting it right can save a household a substantial sum. This guide explains what remortgaging is, why and when people do it, what it costs, and the risks to consider. This is general information, not financial advice.

What remortgaging is

Remortgaging means taking out a new mortgage on a property you already own — either moving to a new deal with your current lender or switching to a different lender altogether. It does not mean moving house; you stay where you are and simply change the loan secured against it.

It helps to understand why the need arises. Most mortgages begin with an introductory deal period — a fixed or discounted rate lasting, say, two or five years. When that period ends, the mortgage usually reverts to the lender's standard variable rate (SVR), which is often noticeably higher. Remortgaging is how you avoid sliding onto that more expensive rate by lining up a fresh deal instead. Our broader guide to how mortgages work sets out the underlying concepts that remortgaging builds on.

Doing nothing is itself a decision. When a deal ends, staying put usually means drifting onto the standard variable rate — often the most expensive option of all.

Why people remortgage

There are a few distinct reasons to remortgage, and it is worth being clear which applies to you:

• To get a better rate. The most common reason: your current deal is ending, and a new deal offers a lower interest rate than your lender's SVR.
• To avoid the standard variable rate. Even if rates have risen generally, a new fixed or tracker deal may still beat sitting on the SVR.
• For payment certainty. Switching to a new fixed rate locks your payments for a set period, which helps with budgeting.
• To release equity. If your property has grown in value or you have paid down the loan, you may be able to borrow more against the home equity you hold — for home improvements, for example.
• To change the mortgage itself. You might want a different term, to overpay more freely, or to switch product type.

Releasing equity deserves caution: borrowing more increases your debt and the amount of interest you pay over time, so it should be a considered decision rather than an easy source of cash.

When to remortgage

Timing matters, because remortgaging is not instant. A widely used approach is to start looking around three to six months before your current deal ends.

This lead time exists because a mortgage offer, once made, is typically valid for several months. By securing a new deal in advance, you can arrange for it to take effect the moment your existing rate expires — so you never spend time on the expensive standard variable rate. Leaving it until the last minute risks a gap during which you pay more than you need to. Setting a reminder for when your deal ends is a small habit that can save real money, and it fits naturally alongside tracking your spending so you always know how your largest outgoing is changing.

The costs to watch

A lower headline rate is not the whole story. Remortgaging can carry costs, and you need to weigh them against the saving:

The early repayment charge (ERC) is the big one to check first. If you are still within your existing deal period, leaving early can trigger a charge that wipes out the benefit of switching — which is why most people remortgage as their deal ends, not in the middle of it. On the new side, some deals advertise a low rate but a high arrangement fee, while others offer free valuation and legal work; the right choice depends on your loan size, so compare the total cost, not just the rate. Reading the credit agreement carefully before you sign is essential, since that is where every fee is set out.

The process

Remortgaging works much like your original mortgage application, because to the new lender it largely is one.

1. Review your current deal — note the end date, the rate, and any early repayment charge.
2. Check your finances — your income, outgoings and credit record all matter.
3. Compare deals — across lenders, weighing rate against fees, ideally with advice.
4. Apply — the lender runs affordability and credit checks and values the property.
5. Complete — once approved, the new mortgage replaces the old one.

Because the lender assesses affordability afresh, your circumstances at the time of applying matter. A strong credit score and stable finances improve the deals available to you. Lenders that take transparency seriously spell out the terms of their agreements plainly; UK lender Credicorp, for example, explains the cost of borrowing within its credit agreements, which is the kind of clear, upfront information any borrower should expect before committing.

The risks and getting help

Remortgaging is usually sensible, but it is not automatically the right move. Watch for these risks:

• The saving may not justify the fees, especially on a smaller mortgage.
• An early repayment charge can outweigh the benefit if you switch mid-deal.
• Borrowing more to release equity increases your total debt and interest.
• A weaker financial position than at your last application could mean a worse deal or a declined application.

Mortgages are regulated by the Financial Conduct Authority, and most people benefit from regulated mortgage advice from a broker or lender who can compare the whole market and account for fees. For free, impartial guidance on remortgaging, MoneyHelper is an excellent independent starting point, and GOV.UK covers related matters such as stamp duty and homeownership schemes.

The bottom line

Remortgaging means switching your existing mortgage to a new deal — with your current lender or a new one — most often to escape an expensive standard variable rate when your introductory deal ends. Start looking three to six months ahead, and compare deals on total cost rather than headline rate, watching especially for early repayment charges and arrangement fees. Remember that the new lender will reassess your affordability and credit, so go in with your finances in good order. Done at the right time and with the figures checked, remortgaging is one of the simplest ways to save a meaningful amount on your biggest debt.