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What is the biggest mistake landlords make with revolving credit facilities?

22nd May 2026

By Simon Carr

What is the biggest mistake landlords make with revolving credit facilities?

For professional landlords and property investors in the UK, maintaining cash flow is essential for expanding a portfolio. When opportunities like auction properties or urgent refurbishments arise, quick access to capital can make or break a deal. A Buy-to-Let (BTL) revolving credit facility, sourced by Promise Money, acts like a property overdraft, allowing you to draw funds, repay them, and draw again without reapplying each time.

However, because this is a specialised financial product, it is easy to make critical errors. Promise Money, an FCA-authorised broker (Ref: 681423), helps landlords navigate these options. Below, we explore the primary errors investors make, particularly the single biggest mistake: treating a secured facility as if it were unsecured generic business credit.

The Ultimate Mistake: Treating Secured Credit as Unsecured Debt

When property investors seek flexible funding, they often ask: what is the biggest mistake landlords make with revolving credit facilities? The absolute biggest mistake is failing to respect its secured nature. Unlike standard business credit cards or generic unsecured overdrafts, a revolving credit facility for property is a secured financial product. Specifically, it sits behind your existing first-charge BTL mortgage as a second charge on your investment property.

When landlords treat this facility like casual, unsecured business cash, they may overlook the necessity of a rigid repayment strategy. Your property may be at risk if repayments are not made. If you default on a secured second charge, you face the prospect of legal action, potential property repossession by the lender, increased interest rates, and additional charges that can quickly erode your equity.

To avoid this, every draw must have a predefined repayment plan. Whether you intend to repay via rental income, property sales, or a future remortgage, you must treat this second charge with the same discipline as your primary mortgage.

Mistake 2: Leaving Funds Drawn Longer Than Necessary

Another common misstep is keeping funds drawn longer than necessary. A major benefit of a revolving credit facility is that interest is only charged on drawn amounts, not on the total limit. Once arranged, you can typically draw funds within 24 to 48 hours.

However, because rates on second-charge facilities are typically higher than first-charge mortgages, they are designed for short-term tactical use. Leaving £50,000 drawn to cover long-term cash shortfalls, rather than seeking long-term refinancing like a remortgage, is highly inefficient. Landlords should aim to draw funds, complete the project, and repay the balance quickly to minimise interest costs.

Mistake 3: Confusing Revolving Credit with Bridging Finance

Many property investors fail to properly compare revolving credit against bridging finance. Bridging loans are typically divided into open and closed bridging loans. A closed bridging loan has a fixed repayment date, while an open bridging loan has no set end date but must typically be cleared within a year.

Furthermore, most bridging loans roll up interest, meaning monthly payments are not typical and the entire debt is cleared at the end. In contrast, a BTL revolving credit facility requires you to manage monthly payments on the drawn balance, but lets you draw down and repay multiple times without setting up a new loan. Mistaking these products can lead to cash flow issues if you are not prepared for monthly interest payments.

Mistake 4: Failing to Verify Your Credit Standing Before Applying

Even though a revolving credit facility is secured, lenders still evaluate your credit history. Some landlords mistakenly assume that because the lender has security in the property, their personal credit profile is irrelevant.

Before applying, check your credit file to address any inaccuracies. Get your free credit search here. It’s free for 30 days and costs £14.99 per month thereafter if you don’t cancel it. You can cancel at anytime. (Ad) Having a clean credit file may help you secure a higher credit limit and better rates.

Practical Scenarios: Using the Facility Correctly

To avoid these mistakes, use the facility for its intended purposes. Typical safe and efficient uses include:

  • Refurbishment Costs: Drawing funds to upgrade a property, increasing its value, and then repaying the facility once you remortgage based on the higher valuation.
  • Auction Deposits: Accessing cash in 24-48 hours to secure a property at auction, avoiding lengthy mortgage approvals.
  • EPC Upgrades: Financing insulation or heating upgrades to meet the strict UK government guidelines on minimum energy efficiency standards.
  • Void Period Cover: Temporarily covering mortgage payments and maintenance during unexpected vacancies, repaying the balance once a new tenant is secured.

People also asked

Is a revolving credit facility secured or unsecured?

A Buy-to-Let revolving credit facility is a secured financial product, established as a second charge against your residential investment property. It is not an unsecured business loan or personal credit card.

How does revolving credit compare to bridging finance?

While bridging loans typically roll up interest and are designed for one-off transactions, a revolving credit facility allows you to draw down, repay, and draw again as needed, with interest only charged on the outstanding drawn balance.

What is the biggest risk of a secured revolving credit facility?

The greatest risk is failing to make repayments, as your property may be at risk of repossession. Defaulting could also lead to legal action, additional fees, and higher interest rates.

How quickly can I access funds once the facility is set up?

Once the revolving credit facility is arranged and active, you can typically draw down the required cash within 24 to 48 hours, making it highly effective for fast-paced transactions like property auctions.

Can I use this facility if I already have a mortgage?

Yes, this facility is specifically designed to sit behind your existing first-charge buy-to-let mortgage as a second charge, meaning you do not have to disturb your current mortgage rate.

Conclusion

A Buy-to-Let revolving credit facility is an incredibly powerful financial tool for UK landlords, offering the speed of bridging finance with the ongoing flexibility of a property overdraft. However, the biggest mistake you can make is forgetting that this is a secured debt. By maintaining a clear repayment plan, keeping your drawn periods short, and using the funds strategically, you can safely grow your portfolio while protecting your existing assets.

If you are considering securing a flexible facility for your portfolio, Promise Money can help. As an FCA-authorised broker (Ref: 681423), we find the right secured options tailored to your goals. Contact our expert team directly on 01902 585020 or visit our dedicated revolving credit hub to explore your options today.

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    More than 50% of borrowers receive offers better than our representative examples. The %APR rate you will be offered is dependent on your personal circumstances.
    Mortgages and Remortgages secured on land
    Borrow £270,000 over 300 months at 7.1% APRC representative at a fixed rate of 4.79% for 60 months at £1,539.39 per month and thereafter 240 instalments of £2050.55 at 8.49% or the lender’s current variable rate at the time. The total charge for credit is £317807.66 which includes £2,500 advice / processing fees and £125 application fee. Total repayable £587,807.66
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