Remortgage to release equity: how much could you borrow?

You may be able to remortgage to release equity by replacing your current mortgage with a larger one. How much you could receive depends on your home’s value, the lender’s borrowing limits, your affordability and the costs involved.

The equity in your home isn’t automatically available as cash. Accessing some of it through a standard residential remortgage means increasing the debt secured against your property and repaying that larger mortgage with interest.

This guide explains additional borrowing through a residential remortgage. Later-life equity-release products, such as lifetime mortgages, work differently.

What does remortgaging to release equity mean?

A remortgage replaces your existing mortgage with one from another lender. When you borrow more as part of that switch, the new mortgage repays the old one, with the surplus available after relevant deductions and completion arrangements.

For example, replacing a £180,000 mortgage with a £210,000 mortgage creates a £30,000 difference before costs. You still own the home, but you owe more against it.

Understanding how remortgaging works helps distinguish this from simply switching rates. A product transfer changes your mortgage product with the same lender; it doesn’t, by itself, provide extra money.

The phrase ‘release equity’ can also describe specialist later-life products. The calculations below concern a standard residential remortgage with additional borrowing, rather than a lifetime mortgage or home reversion plan.

How much equity do you have in your home?

For a property with one mortgage and no other secured borrowing, the starting calculation is:

Property value − outstanding mortgage = estimated equity

Consider this hypothetical home:

Item	Amount
Estimated property value	£300,000
Outstanding mortgage	£180,000
Estimated equity	£120,000
Current loan-to-value	60%

Loan-to-value, or LTV, compares the mortgage with the property’s value. Here, £180,000 divided by £300,000 gives 60%.

Equity can build through repaying mortgage capital or an increase in property value. Your home doesn’t have to rise in value for you to have equity, and prices can fall too.

If there’s another loan secured against the property, that borrowing also needs to be considered. The £120,000 in this example assumes there isn’t one. It isn’t an amount the homeowner can automatically withdraw.

How much could you borrow when remortgaging?

Start with the potential total mortgage, then subtract the borrowing that needs to be repaid.

Illustrative LTV ceiling = lender-accepted property value × applicable LTV percentage

Potential extra borrowing before costs = permitted total mortgage − existing mortgage balance

The permitted total mortgage may be lower than the LTV ceiling because of affordability or other lender criteria.

Using the £300,000 home and £180,000 mortgage above:

Illustrative new LTV	Total mortgage at that LTV	Extra borrowing before costs
75%	£225,000	£45,000
80%	£240,000	£60,000
85%	£255,000	£75,000

These are hypothetical arithmetic scenarios, not confirmed products, lending offers or a recommendation to borrow at any particular LTV. They assume no other secured borrowing and exclude fees and charges.

Notice that 80% LTV means borrowing 80% of the property’s value in total. It doesn’t mean borrowing 80% of your equity.

You can also work backwards from the money you need. An extra £30,000 would increase the £180,000 mortgage to £210,000 before financed costs. Against a £300,000 valuation, that would be 70% LTV.

That gives you a starting point for a discussion, rather than a decision about what a lender will offer.

Why might a lender offer less than the equity calculation suggests?

Having sufficient equity is only one part of the application. The lender also assesses the proposed borrowing and your ability to repay it.

The FCA’s explanation of mortgage affordability checks describes how income and expenditure affect lending decisions. It also distinguishes an eligible current-lender rate switch from a request to borrow more.

Factors that may affect your remortgage borrowing limit include:

Factor	Why it matters
Income and evidence	The lender must establish the income it can accept
Household spending	Bills, childcare and dependants affect affordability
Existing commitments	Loans, credit cards and other payments can reduce capacity
Credit history	Previous problems may affect available lenders and products
Term and retirement plans	The repayment period and income over that period matter
Property	The lender needs an acceptable valuation and suitable security
Borrowing purpose	Not every lender accepts every use of the money

There isn’t one income multiple that tells every homeowner how much extra they can borrow.

If affordability supports a smaller mortgage

Suppose the illustrative 80% LTV calculation allows £240,000, but the lender’s affordability assessment supports only £215,000 in total.

After replacing the £180,000 mortgage, the potential surplus would be £35,000 before costs, rather than £60,000. The £215,000 figure is an assumption for this example, not a calculated entitlement.

If the lender values the property lower

Now suppose the lender accepts a property value of £280,000 instead of £300,000. At an illustrative 80% LTV, the ceiling becomes £224,000.

Subtracting the £180,000 mortgage leaves £44,000 before costs, subject to affordability and the remaining criteria.

We’d check the proposed total mortgage against both the property value and affordability before treating an equity estimate as realistic borrowing. An online property estimate alone can’t settle either question.

What is the maximum LTV for releasing equity?

There’s no single percentage that applies to every remortgage with additional borrowing. Limits depend on the lender, product, reason for borrowing and wider application.

For example, as of 15 October 2026, Nationwide’s remortgage guidance allows eligible remortgages up to 95% LTV without additional borrowing, with other conditions. It stated a lower maximum of 90% where additional borrowing was involved, subject to eligibility and affordability.

That’s one lender’s policy, not a market-wide limit. A headline maximum for replacing an existing balance shouldn’t automatically be used to estimate capital raising.

A higher LTV may also change the products or rates available. The largest possible mortgage isn’t necessarily the most suitable amount to borrow.

How do fees affect the money you receive?

The mortgage increase and your usable cash can be different figures. Product fees, legal costs, broker fees, exit charges and any early repayment charge may affect the budget.

Some costs are paid separately, some may be financed and others may be deducted from completion funds. The arrangements need checking for the particular mortgage.

Here’s a hypothetical example:

Item	Amount
Total new mortgage, including financed costs	£240,000
Existing mortgage repaid	£180,000
Assumed costs funded within the mortgage proceeds	£2,000
Remaining funds	£58,000

This assumes no other secured borrowing, that £180,000 settles the existing mortgage, and that the lender permits the proposed funding arrangements. The £2,000 is an illustrative combined cost, not a quote or market average.

Most importantly, those costs sit inside the £240,000 mortgage. Adding them on top would increase the loan to £242,000 and change the LTV.

The final redemption figure may differ from your latest statement balance because of interest or charges. Avoid counting a charge twice if it’s already included in the settlement figure.

We’d establish how much cash you need after costs, rather than treating the headline mortgage increase as your spending budget.

What will borrowing more cost each month and over time?

With a remortgage, the new rate generally applies to the replacement mortgage, including the existing balance. You need to consider what happens to that borrowing as well as the extra money.

The following hypothetical repayment example isolates the effect of loan size. It assumes a capital-and-interest repayment mortgage over 20 years, a constant 5% annual interest rate and no fees or charges.

Total mortgage	Approximate monthly repayment
£180,000	£1,188
£210,000	£1,386

On those assumptions, an extra £30,000 increases the monthly repayment by about £198. Over the full 20 years, the additional borrowing produces approximately £17,517 of extra interest, as well as repayment of the £30,000 capital.

Payments are rounded to the nearest pound. The interest difference uses unrounded calculations. Assuming 5% throughout is a modelling assumption, not a forecast or an available mortgage quote. Actual costs change with rates, fees and repayment arrangements.

Moving your existing balance away from a favourable rate could make the real increase larger. Extending the term may reduce the monthly payment compared with a shorter term, but can increase total interest. Financed fees attract interest too.

You can model different amounts, rates and terms with our mortgage repayments calculator. Its results are illustrations, not confirmation of lending or affordability.

What can you use the additional borrowing for?

Home improvements and buying out another owner’s interest are examples of reasons someone might seek additional borrowing. Other purposes may be accepted, depending on the lender and application.

The intended use matters. Nationwide’s existing-customer borrowing guidance, for example, sets different limits for some purposes. Those are its additional-borrowing rules, not universal criteria for remortgaging elsewhere.

Lenders may request supporting information. For improvements, don’t assume spending £30,000 automatically increases the property’s value by £30,000 or that an expected future value will be accepted.

Debt consolidation needs particular care. Moving unsecured debt into your mortgage secures it against your home. Spreading repayment over longer can also increase the total interest, even if the monthly payment falls.

Special circumstances can add restrictions. For example, additional borrowing after Right to Buy can involve considerations beyond the standard equity calculation.

How can you get a realistic borrowing estimate?

Gather these details before comparing options:

• Your estimated property value and current mortgage balance.
• Any other borrowing secured against the property.
• Your existing rate, deal-end date and early repayment charge details.
• The cash you need after costs and its intended use.
• Your income, household expenditure and commitments.
• The repayment term you’re considering.

A further advance from your current lender, a second charge mortgage, savings or unsecured borrowing may be alternatives worth considering. Their suitability depends on the amount, cost, risks and your circumstances. A full remortgage isn’t automatically the best route just because you have equity.

Our remortgage advice can help you understand how your equity, affordability and existing deal affect the equity release options available, including the cost of borrowing more.