Bridging Finance Credit Lines UK: How Revolving Facilities Work and When They Actually Make Sense

Revolving bridging credit lines have been getting more attention from repeat investors over the past year or so — facilities where a lender agrees a total borrowing limit and lets you draw, repay, and redraw against it as deals cycle through, rather than going back for a fresh underwrite each time. The mechanics are genuinely different from a single-draw bridge, and most borrowers are still applying single-draw logic to a product that doesn't work that way. That tends to create problems: either an unsuitable structure or a missed opportunity, depending on which direction the mismatch runs.

This post covers how bridging credit lines are actually structured, what lenders want to see, what they cost compared to standalone bridges, and the deal scenarios where a revolving facility creates real structural advantage versus those where it just adds complexity for no particular reason.

What a Bridging Credit Line Actually Is

A bridging credit line is an agreed borrowing limit — typically in the range of £500k to £5m for most property investors, though some lenders go higher for the right borrowers — secured against a portfolio of properties rather than a single asset. You draw what you need, repay when a deal exits, and redraw for the next transaction. No fresh credit committee, no new application pack, no waiting.

Interest accrues only on the drawn balance, on the same daily basis as a standard bridge. If you have a £2m credit line and £800k drawn, you pay on £800k. The facility fee — charged as a percentage of the total limit at outset — is the cost of having the headroom available regardless of whether you use it. The instinct to minimise the facility limit to reduce the fee is understandable when you are thinking in single-loan terms, but it works directly against the revolving structure. The headroom is the product. Price it accordingly. (Worth noting: some of the more relationship-focused lenders — the smaller specialist shops rather than the institutionally-owned platforms — will occasionally negotiate on facility fee structure for the right borrower profile. It is not the norm, but it exists.)

Security structure and cross-charges

Most bridging credit lines are secured by first legal charge over a pool of properties, and when you draw to fund a new acquisition, that property typically gets added to the security pool. This creates a cross-charge arrangement — all properties in the pool secure the whole facility — which needs spelling out clearly if your borrower has existing equity partners, JV arrangements, or personal guarantors involved in some assets but not others.

Some lenders will accept rotating security, where a property exits the pool on loan repayment and a new one enters on the next draw. This is cleaner from an asset management perspective but adds administrative friction and usually requires lender consent on each rotation, which can slow acquisition timelines if you are trying to move quickly.

Qualifying Criteria: What Lenders Actually Want

Credit lines are not a first-time bridging product. Lenders want demonstrable track record — typically a minimum of three completed property transactions in the past two to three years, with documented exits at or near projected values. In practice, the strong applicants tend to have considerably more.

It is also worth understanding that the lender landscape here has shifted in the past twelve months or so. The institutional capital flowing into UK bridging — through acquisitions and funding partnerships of the kind covered in our post on Balbec's takeover of Funding 365 and what institutional ownership means for lender criteria — has changed which lenders offer revolving facilities and on what terms. Several lenders that previously offered credit lines to smaller investors with sub-£1m portfolios have pulled back as their risk mandates tightened under new ownership. Others have quietly increased minimum facility sizes. Current appetite needs checking against today's market, not product guides from 2024.

Beyond track record, lenders are looking at three things:

Net worth relative to facility size. Most want to see net assets — property equity plus liquid reserves — of at least 1.25x the facility limit, often more. A £2m credit line application from someone with £1.8m net worth is not going to get approved regardless of how clean the track record is.

Cashflow and liquidity — and this is the one that tends to catch people. The pattern that creates problems: strong equity on paper, almost no liquid reserves — which works fine until two or three drawn positions run over time simultaneously. It sounds obvious when you write it out, but lenders are assessing this scenario explicitly. The question they are really asking is not whether you can service the facility in normal conditions. It is what happens when two deals run three months over simultaneously and a third acquisition lands on your desk. Borrowers without a credible answer to that question do not get the facility.

LTV discipline across the portfolio. Individual draws within the facility will be subject to LTV caps — typically 70-75% on residential, 60-65% on commercial — but the lender also monitors aggregate LTV across the whole security pool. A fall in value on one asset can push portfolio-level LTV above covenant even if each individual draw was made conservatively. That is a point worth making explicitly to borrowers who are new to the product.

This is meaningfully more demanding than the requirements for a standalone bridge, as our post on bridging finance requirements and what lenders actually want from property investors in 2026 covers in detail. Credit line underwriting sits closer to a corporate credit assessment than a standard property-secured lending decision — the lender is evaluating the business as much as the assets.

How the Costs Stack Up Against Standalone Bridging

The rate on a credit line draw is usually comparable to — sometimes marginally higher than — what the same borrower would pay on a standalone bridge with the same lender. Monthly rates sit in broadly the same territory as standard bridging, though where exactly depends on LTV, asset type, and which lender you are with. The base rate has been held at 3.75% through June 2026, but as we have covered previously, bridging rates are moving independently of BoE policy — wholesale funding costs and lender-specific appetite are doing more work than Threadneedle Street right now.

The facility fee is where the cost difference actually sits. A single-draw bridge charges an arrangement fee of 1-2% of the loan amount. A credit line charges a facility fee of typically 1-2% of the total committed limit — often annually on renewal — whether you draw the full amount or a fraction of it. On a £2m facility, that is £20,000-£40,000 per year just to keep the line available.

For the maths to work, you need to be cycling through the facility regularly. If you are doing one or two transactions per year, the facility fee alone makes the credit line more expensive than individual bridges each time. If you are doing four to six, the economics shift: faster access, lower aggregate arrangement costs, and the ability to move on acquisitions without waiting for underwriting. The rough threshold where a credit line starts making sense is around £30,000 per year in arrangement fees across individual bridges. Below that, sourcing standalone bridges across a broad lender panel will typically produce better pricing.

When a Credit Line Creates Genuine Structural Advantage

Cost is only part of it. There are deal types and investor profiles where a revolving facility is clearly the better instrument because of the structural benefits, not just the economics.

High-velocity acquisition strategies are the obvious case — investors buying three to six refurbishment opportunities per year across different locations who cannot afford to wait for fresh credit decisions on each one. In a competitive acquisition market, having pre-agreed funding you can draw in days is worth something concrete.

Auction-heavy strategies are another. The 28-day completion deadline at property auctions creates genuine pressure, and a pre-agreed credit line means you are bidding with certainty rather than with a conditional bridge offer that could fall over at underwriting. Our post on how bridging finance makes auction property purchases possible within 28 days covers the auction mechanics in more detail, but the credit line advantage is specific: you are removing re-underwriting risk from the equation entirely.

Portfolio refurbishment programmes — rolling vacancy-to-let cycles across an existing portfolio — also suit the revolving structure well. Rather than individual applications for each unit, a credit line against the portfolio provides the working capital layer in a single facility.

Where a credit line does not make structural sense: one-off transactions, investors with fewer than three deals per year, anyone who can get meaningfully better LTV deal-by-deal through competitive lender selection, or deals where the assets in the security pool have materially different risk profiles that would create covenant tension at the portfolio level.

The Practical Structuring Decision

The question is straightforward: what is your transaction velocity, and what are you currently paying in arrangement fees across individual bridges versus what a credit line would cost all-in including the annual facility fee?

If the answer favours a credit line, the next question is whether your track record, net worth, and portfolio quality meets the criteria at the lenders currently offering them — bearing in mind that the market for this product has contracted at the smaller end as institutional ownership has tightened risk mandates across the sector.

For borrowers on the threshold — enough deals to consider a credit line but not enough to be certain — the practical advice is to keep building track record on individual deals with clean exits and accurate projections. Understanding how bridging finance accelerates portfolio growth over the medium term is relevant here: the investors who get the best credit line terms are the ones who spent two or three years doing individual bridges well before they asked for a revolving facility.

Frequently asked questions

How is the facility fee on a bridging credit line calculated, and is it refundable?

Facility fees are typically 1-2% of the total committed limit annually — not just the drawn balance — and are almost never refundable if you use less than the full facility. On a £1.5m credit line at 1.5%, that is £22,500 per year whether you draw £300k or the full amount. Size the facility to what you will actually use, not the maximum you might theoretically need.

What happens if property values fall and the aggregate LTV across the security pool breaches covenant?

This is the risk most borrowers underestimate — and it catches people who structured each individual draw conservatively, because the lender is monitoring the portfolio position, not just each asset in isolation. A fall across the pool can trigger a covenant breach even if no single draw would have looked problematic on its own. The cure options are typically additional security, partial repayment, or a combination. Running a revolving credit line through a volatile market without liquid reserves to cure a realistic downside scenario is not a risk worth taking. 2026 is probably not the year to find this out the hard way.

Can a bridging credit line be used for development finance?

Mostly not — at least not for ground-up development, where the security value moves through the build and staged drawdowns are essential. Development finance needs its own dedicated facility structure. Some lenders will accommodate heavy refurbishment within a credit line depending on the works involved, but it is deal-specific and needs clarifying before you structure anything. Light-to-medium refurbishment is generally fine; anything involving structural change or extension is worth querying explicitly.

Is a credit line worth it if I'm only doing two or three deals a year?

Probably not on pure economics. The facility fee — charged on the committed limit whether you draw it or not — tends to tip the cost comparison against a credit line at lower transaction volumes. Two or three well-sourced standalone bridges per year, placed competitively across a wide lender panel, will usually cost less in aggregate. The credit line argument gets compelling at four-plus deals annually, or when acquisition speed is itself creating value — auction strategies in particular.