Remortgaging is one of the most straightforward financial decisions you can make when the timing is right and your circumstances are simple. When your fixed rate is coming to an end and nothing much has changed since you first took out the mortgage, switching to a better rate is usually a matter of a few forms and a few weeks.
But not every remortgage is straightforward. Circumstances change. Income changes. People become self-employed, buy investment properties, get divorced, remarry, or find that their lender is no longer the right one for where they are now. This guide covers both the straightforward and the more complex, and explains when you need a specialist in your corner.
When to remortgage
The most common trigger for remortgaging is the end of a fixed rate period. When your fixed rate expires, your mortgage typically reverts to the lender's standard variable rate, which is almost always higher than the deal rate you were on. Most borrowers start looking at remortgaging options three to six months before their fixed rate ends to ensure continuity.
Other reasons to remortgage include wanting to release equity from the property for home improvements, a deposit on an investment property, or other purposes; wanting to consolidate other debts into the mortgage; or finding that your circumstances have changed significantly and a different lender or structure would be more appropriate.
Product transfer vs remortgage: what's the difference?
A product transfer means switching to a new deal with your existing lender. A remortgage means switching to a new deal with a different lender.
Many lenders offer product transfer options that are quick and require minimal paperwork, because you are already a customer. This can look attractive. But it is worth comparing what your existing lender offers against the wider market before assuming that staying put is the right decision.
Your existing lender has no obligation to offer you their best rates. The best rate available to you may be with a different lender. A specialist broker will compare both options and advise on which gives you the better outcome.
Remortgaging when your income has changed
One of the most common reasons people end up stuck on an uncompetitive rate is that their circumstances have changed since they took out their original mortgage. They have become self-employed. Their income structure has shifted. They have acquired investment properties. They have had a period of lower earnings.
Some lenders are inflexible about changed circumstances. A lender who was comfortable lending to you when you were employed may not know how to assess your income now that you are a company director drawing salary and dividends.
Specialist lenders do know how to assess this, and the right broker can find them. If your income is more complex now than it was when you first got your mortgage, the solution is not to accept a poorer rate with your existing lender. It is to find a lender who can see the full picture.
Remortgaging to release equity
If your property has increased in value since you bought it, or if you have paid down a significant portion of the mortgage, you may have equity that you can release by remortgaging to a higher loan amount.
Released equity can be used for home improvements, a deposit on an investment property, school fees, or other purposes. It is borrowed money secured against your property, so it needs to be treated seriously and the additional monthly cost factored into your budget.
Some lenders are flexible about the purpose of equity release; others have restrictions. A specialist broker can identify which lenders will accept your specific purpose and offer the best available terms.
Remortgaging with additional properties
If you own buy-to-let properties in addition to your residential home, some lenders will factor your rental income into the affordability assessment for your residential remortgage. Others will treat the buy-to-let mortgages as committed expenditure and assess your residential affordability on your personal income alone.
This matters because the two approaches can produce significantly different borrowing figures. A specialist broker who knows this market will identify which lenders take which approach and advise accordingly.
Early repayment charges
If you are on a fixed rate and want to remortgage before the fixed rate period ends, you will usually face an early repayment charge. These can be significant, sometimes running to thousands of pounds.
Whether it is worth remortgaging mid-fix depends on the size of the early repayment charge, the rate differential between your current deal and the new one, and how long is left on your current fix. In some cases the saving from a lower rate is large enough to justify paying the early repayment charge. In others, it is better to wait.
A broker can model this calculation for you and give you a clear picture of whether early switching makes financial sense in your specific situation.
Debt consolidation remortgages
Some borrowers use a remortgage to consolidate other debts, such as credit cards or personal loans, into their mortgage. This can reduce the monthly payment on those debts significantly because mortgage rates are generally much lower than credit card or loan rates.
However, there are important risks to understand before going down this route. By consolidating unsecured debt into a secured mortgage, you are putting your home at risk if you cannot maintain the payments. You are also likely to be paying interest on those debts over a much longer period than you otherwise would have, which can mean paying significantly more in total even at a lower rate. These factors need to be understood and weighed carefully before proceeding.
Frequently asked questions
When should I start my remortgage application?
Most advisers recommend starting the process three to six months before your current deal expires. This gives you time to assess your options, complete the application, and have the new mortgage ready to start when your existing deal ends.
Can I remortgage if I am self-employed?
Yes. The same principles that apply to self-employed purchase mortgages apply to remortgages. Specialist lenders assess self-employed income properly. The key is finding the right lender rather than defaulting to your existing one.
What if my income has changed since my last mortgage?
Changed income does not automatically prevent you from remortgaging, but it does affect which lenders are available to you. A specialist broker who understands complex income will identify the right options for your current situation.
Can I remortgage to release equity for a buy-to-let deposit?
Yes, this is a common strategy for people building a property portfolio. The released equity from your residential property is used as the deposit on an investment property. Lenders will assess the affordability of the increased residential mortgage as well as the buy-to-let application.
What happens if I am in a fixed rate and want to switch early?
You will typically face an early repayment charge. The size of this depends on your mortgage terms and how much time is left on the fixed period. A broker can calculate whether the saving from a better rate justifies the cost of exiting early.
Last updated: 10 May 2026