Should You Remortgage Your Home to Invest in Property?
July 18, 2026
Should you remortgage your home to invest in property? I wouldn’t answer that with an automatic yes or no. For one household, carefully borrowing against existing equity could bring an investment plan forward by years. For another, it could put the family under pressure for a return that never justified the risk.
Borrowing played a major part in my own property journey. In my video published on 18 July 2026, I described a portfolio worth around £3.5 million and a rent roll of approximately £26,000 a month, built over six years. That is gross rental income, not monthly profit, and property value is not the same as my net equity.
I wouldn’t have built that portfolio in the same way without borrowing. But there is a big difference between using debt deliberately and taking every pound a lender is prepared to offer. This is how I would think through the decision before involving the family home.
You can also watch my home-remortgage investment video on YouTube.
Releasing equity means taking on more debt
Suppose your home is worth £400,000 and the mortgage is £160,000. You have £240,000 of equity before selling costs. That equity belongs in your overall financial picture, but it is not sitting in a bank account ready to spend.
If a lender agreed to increase the mortgage to £220,000, the additional borrowing would be £60,000 before fees. The new loan-to-value ratio would be 55%, compared with 40% beforehand.
You could put the cash towards an investment property’s deposit, purchase costs and refurbishment. But calling it released equity can make the transaction sound more comfortable than it really is. You have borrowed another £60,000 against the place where you live.
It has to be repaid, and the additional commitment exists regardless of whether the investment works. I want that understood before discussing projected rent or a promising purchase price. The home mortgage is not cancelled when a tenant stops paying.
This is also different from later-life equity-release products. I’m discussing ordinary additional mortgage borrowing or remortgaging, with the product and repayment structure assessed for your circumstances by a qualified adviser.
Calculate the cost across the whole household
In the video, I illustrated borrowing £60,000 over twenty-five years at 5.5%. A standard capital-and-interest calculation produces a payment of approximately £368 a month, which I rounded to £370 in the recording.
That is the payment for the additional borrowing in isolation. A full remortgage might also change the rate on the existing £160,000, so the actual change in your household payment could be different. Fees, early repayment charges and the remaining term also matter.
Now suppose the rental produces £500 a month after its own mortgage and normal operating costs, but before your personal tax and the borrowing against your home. Subtract the illustrative £368 payment and the immediate household cash improvement is only about £132 a month.
That isn’t the same as creating £500 of spendable income. Nor is the full £368 a pure expense: part repays capital and reduces your home mortgage balance. The cash-flow test and the wealth calculation are related, but they are not identical.
I would calculate both. Can the household comfortably make every payment? Separately, what is the investment doing to income, debt and equity after costs and tax? Keeping those questions distinct makes the decision much clearer.
The household needs to be secure first
I would not borrow against the family home for an investment that depends on everything going perfectly. Reliable income and accessible reserves are the starting point, not an optional extra after the purchase.
Ask what happens if the property is empty for a while, a tenant falls behind or a repair is larger than expected. Then ask what happens if the same month also brings a problem at home. Investment risk and ordinary life do not take turns politely.
I would want enough cash left after completion to handle plausible problems without immediately using expensive credit or missing another payment. The right amount depends on the household and property, rather than a universal number of pounds.
It helps to separate a household emergency reserve from money allocated to refurbishment and known property bills. If the same £5,000 appears in three different parts of your plan, you haven’t created three buffers. You have one pot with several demands on it.
The FCA’s guidance on mortgage support and borrowing costs explains why contacting a lender early matters if payments become difficult. I would rather build the plan so an ordinary problem remains manageable than rely on support after the budget has already broken.
A good property still has to justify the borrowing
I would struggle to justify releasing equity to buy an ordinary property at full market value, with weak cash flow, in an area I barely understood. The transaction adds a home-loan commitment, another property and the responsibilities of being a landlord.
There needs to be a meaningful reason for accepting those obligations. I would be more interested in a property bought at a defensible price, with verified rental demand and a credible route to improvement.
That might involve refurbishment or poor presentation that can be addressed economically. It might involve negotiating well with a seller. What matters is evidence: comparable transactions, realistic quotations, likely rent and a sensible allowance for problems.
An asking price reduced by 10% does not automatically mean you have bought 10% below market value. The original asking price could have been optimistic. I would want independent evidence for the value I am using, especially if the whole plan relies on a later refinance.
My guide to investing £50,000 in property explores the wider use of a limited capital pot. The extra consideration here is that the starting money itself has a borrowing cost secured against your home.
Why a discount is not money back in your account
In the video I used a £200,000 property bought for £180,000 as an example of creating value through a good purchase. If the higher valuation is genuinely supportable, the £20,000 difference improves the position compared with paying full value.
But that is paper equity before costs, not £20,000 returned to your bank account. The discount does not reduce the £60,000 home loan, pay the stamp duty or fund the next repair by itself.
The recording also discussed potentially recovering the initial capital in a little over two years. I would treat that as an optimistic illustration, not a timetable to rely on. The video does not provide a complete set of growth, rental, cost and refinancing assumptions that would establish that outcome.
To withdraw cash later, a lender must accept the valuation, the rental coverage, your circumstances and the proposed loan size. For example, 75% of an accepted £200,000 valuation is £150,000. If the existing investment mortgage were £135,000, the additional borrowing would be £15,000 before fees, not the full £20,000 paper uplift.
Those example loan balances simply show the mechanics. They are not an offer or a reconstruction of a particular purchase. Equity created, cash earned and cash that a lender will release are three different amounts.
Compare the loan-to-value before and after
Moving a home mortgage from 40% to 55% loan-to-value is different from moving it from 70% to 85%. Both involve borrowing more, but the remaining cushion against a falling valuation is very different.
For a £400,000 home, a £220,000 mortgage becomes 68.75% loan-to-value if the property falls 20% to £320,000. A £340,000 mortgage on the same home would exceed that reduced value. This is a stress-test illustration, not a prediction of a price fall.
Lower leverage doesn’t make the payment automatically affordable, and high equity doesn’t pay monthly bills. But the valuation cushion can affect your flexibility when refinancing, moving home or dealing with changed circumstances.
I would also test higher payments when any fixed rate ends. Work through the home mortgage and the investment mortgage together. A deal that appears comfortable only because one payment is missing from the calculation has not passed the test.
Your partner needs the same picture you have
Where the decision affects a shared household, both partners need to understand it and genuinely agree. I wouldn’t present only the attractive rental figure while leaving the additional home borrowing, void risk and exit costs in the background.
Talk about what would make you uncomfortable and what you would do if the investment disappointed. Would you still be able to manage if one income stopped temporarily? Is there a planned move, a career change or another major family commitment coming up?
These questions aren’t an argument against investing. They are part of choosing an investment that fits your life. A return that looks good on paper can be a poor trade if the household spends the next few years worrying about the mortgage.
I also think the exit needs discussing at the beginning. Selling a rental property can take time and incur tax, legal and selling costs. It is not equivalent to moving money instantly between savings accounts when priorities change.
Why I still see a place for the strategy
A homeowner can spend years building substantial equity while keeping relatively little cash outside the home. Carefully accessing part of that equity may allow them to buy an income-producing asset without waiting years to save another deposit.
That was part of my own route. I went on to build the portfolio further and eventually moved into rented accommodation because of how I viewed the capital tied up in my home. My explanation of why I rent my own home covers that separate decision.
It worked for me, and I also made mistakes along the way. My results don’t establish that the same amount of borrowing or the same approach is appropriate for another household. The underlying deal and the ability to cope with setbacks still decide whether the risk makes sense.
I would consider the strategy where the home mortgage remains comfortable, income is reliable, reserves are sufficient and the investment is genuinely good. I would avoid it where somebody is already stretched or is buying a mediocre property simply because they are desperate to get started.
Make the borrowing serve the plan
Before proceeding, speak to a properly qualified mortgage broker about the permitted purpose of the borrowing, affordability and the complete cost. Take appropriate financial and tax advice where the decision affects your wider position. Make sure the proposed use of the deposit is acceptable to both lenders.
Being able to borrow is not the same as having a good reason to borrow. I want to know what the money will achieve, what it will cost and what happens if the first version of the plan doesn’t work.
If you want to discuss the property side of that plan, book a free property strategy call. You can also explore Starter Club or explore Done For You and a 20-minute suitability call.
Your home doesn’t need to become an unlimited source of deposits. But a carefully considered amount of borrowing can sometimes put existing equity to productive use. The deciding factors are how much you borrow, what you buy and whether your household can cope when reality differs from the spreadsheet.