A good buy-to-let comes up, the numbers stack up, and then comes the sticking point familiar to almost every landlord: how do you actually pay for it? Some investors remortgage an existing property to release cash. Others build up savings from rental income and wait until the deposit is sitting in the bank. Neither approach is automatically right. The better fit comes down to your rates, your available equity, your monthly cash flow and how quickly you want to grow.
The Building Up Cash Reserves First Path
Saving for a deposit is the more straightforward route. Rental profits and other income are set aside month by month until there’s enough to put down on the next purchase.
The upside is simple. There’s no new debt, no lender fees, no credit checks, and no exposure to rate changes on borrowing you don’t yet have. The money is entirely under your own control.
The downside is speed. Building a full deposit from rental income alone can take years, and a deal that meets your numbers today might not still be on the market by the time you’re ready. For landlords running a smaller portfolio, or those who would rather not add to what they already owe, saving remains a sound option, particularly for anyone who prioritises low risk over rapid growth.
The Releasing Equity Through Refinancing Path
Refinancing means replacing an existing mortgage with a new one, often against a property that has grown in value, to release some of that equity as cash for the next deposit. It’s the mechanism behind buy-refurbish-refinance strategies, where an investor buys below market value, improves the property, then refinances against the higher valuation to fund what comes next. Anyone taking this route on an older property should also weigh up the risks that tend to surface once renovation work is underway, since unexpected costs can eat into the equity you were relying on.
The appeal of refinancing is speed. Rather than waiting years to save, a landlord with sufficient equity can access a deposit within weeks. The trade-off is that overall debt increases and monthly repayments rise with it. There are also costs to factor in beyond the loan itself, including valuation fees, legal fees and, in some cases, early repayment charges if you’re refinancing before your current deal has run its course.
Refinance or Save: What Would It Mean for You?
Enter your own numbers to see roughly how much equity refinancing could release, and how long it would take to save the same amount.
Based on a typical 75% loan-to-value ceiling. Usually accessible within weeks, minus valuation, legal and any early repayment fees.
At your monthly saving rate, assuming no other costs or interruptions.
Figures are illustrative only, calculated from the numbers you enter above. They don’t account for interest, fees or changes in property value, and lending criteria vary between lenders. This isn’t financial advice, speak to a mortgage adviser or broker about your own circumstances.
What Should Influence the Decision
There’s no single factor that settles this either way. A few tend to carry the most weight.
Interest rates matter on both sides. A lower rate environment makes refinancing cheaper to service, while a higher one makes saving more attractive, since cash sitting in a savings account can earn a decent return of its own. Available equity matters too. Refinancing only works if there’s enough value built up in the property to release a meaningful sum once fees and the existing mortgage are accounted for.
Cash flow carries just as much weight as the equity itself. Lenders typically check how comfortably rental income covers the new repayments using what’s known as an interest cover ratio, and landlords are often better off running that same calculation themselves before committing.
Market conditions and personal goals round it out. In a competitive market where good deals move quickly, refinancing’s speed can be the deciding factor. In a quieter market, there’s less urgency to move fast, which gives saving more room to work. It’s also worth thinking about where the portfolio should be in a few years, since that shapes how much risk is worth taking now, particularly against the wider shifts shaping the property market.
Refinancing isn’t the only route beyond a standard remortgage either. Landlords taking on larger or more complex projects sometimes look at development finance or bridging alongside it, and it’s worth understanding how those options differ before ruling anything in or out, covered in this guide: https://rangewell.com/property-development/guides/what-are-the-different-types-of-development-funding.
Working Out What Fits Your Portfolio
There isn’t a universally right answer here, only the one that fits your own numbers. A landlord with strong equity and a competitive market on their doorstep may find refinancing gets them to the next purchase faster than saving ever could. A landlord who would rather avoid extra debt, or whose cash flow is already stretched, may be better served by patience.
What matters most is working through the maths properly before committing either way, rather than defaulting to whichever route feels quicker. The right funding decision is the one that still makes sense a few years down the line, not just on the day you sign.
