Bridging Finance: Buy Before You Sell

It is one of the more stressful positions in property. You have found the house you want. You already own one. Selling first means finding somewhere to live in between, and buying first means carrying two mortgages you were never assessed for.

Bridging finance exists for exactly this gap. It is well understood by lenders and used routinely, but it is also widely misunderstood by borrowers, and the misunderstandings tend to be expensive.

How It Actually Works

A bridging loan is not a separate product sitting alongside your mortgage. It is a structure, and the two numbers that define it are peak debt and end debt.

Peak debt is everything you owe while you own both properties. That is the balance remaining on your current home loan, plus the purchase price of the new property, plus stamp duty, legal costs and the interest that accrues during the bridging period.

End debt is what remains after your existing property sells and the net proceeds are applied to the balance. End debt is the loan you are left servicing for the long term.

Here is the part that catches people out: most lenders assess your ability to service the end debt, not the peak debt. They are satisfied that peak debt is temporary, provided the sale is realistic. That is what makes bridging possible at all, because very few people could service peak debt on their income.

Interest Is Usually Capitalised

During the bridging period you generally do not make repayments on the bridging portion. The interest is calculated and added to the loan balance instead. This is called capitalising, and it is why bridging works for people who could not possibly service two mortgages at once.

It also means the debt grows every month you hold both properties, and that growth compounds. A six-month bridging period costs considerably more than a two-month one, and not in a straight line.

Some lenders require you to keep servicing your original home loan as normal and capitalise only the new portion. Others capitalise everything. The difference affects your monthly cash flow substantially during the period when your cash flow is already under pressure.

Closed Versus Open Bridging

This is the distinction that matters most, and it is the one borrowers most often do not know exists.

Closed bridging applies when your existing property is already under an unconditional contract with a settlement date. The lender knows what the property sold for and when the money arrives. The end debt is a known quantity. Rates are better, approval is more straightforward, and most lenders are comfortable.

Open bridging applies when your property is not yet sold. The lender is relying on an estimate of what it will fetch and an assumption about how long it will take. That is genuine risk, and it is priced and policed accordingly: higher rates, tighter maximum terms, more conservative valuations, and in many cases a requirement that the property is already listed and actively marketed.

Most lenders cap bridging periods at around six months for an existing property, and sometimes twelve months where a new home is being built. If the property has not sold by the end of the term, you are in a difficult conversation. Some lenders will extend. Others will move the loan to a higher rate, or require the property be sold at whatever it will fetch.

What It Costs

Bridging is more expensive than a standard home loan, and the cost comes from three directions at once.

The rate. Bridging rates sit above standard variable rates, and open bridging sits above closed bridging.

Capitalised interest. Because you are not paying the interest down, you are paying interest on interest for the duration.

Duplicate holding costs. For the bridging period you are paying rates, insurance, utilities and maintenance on two properties.

The total is sensitive to time in a way that borrowers consistently underestimate. The question is never just "what is the rate" but "how confident am I about the sale date, and what happens to the cost if I am wrong by three months".

When Bridging Is the Right Answer

Bridging works well when a few things are true.

You have meaningful equity in your current property. Bridging is an equity play: the more of your existing home you own outright, the lower your peak debt and the more comfortable every lender becomes.

Your existing property is genuinely saleable at a price you can defend. A realistic appraisal, not an optimistic one.

The new purchase is time-critical. The property is right, the market is moving, and waiting to sell first means losing it.

You can service the end debt comfortably. This is what the lender assesses, and it needs to be true without strain.

When It Is Not

Bridging is the wrong answer more often than people expect.

If your existing property is hard to value or hard to sell, the risk sits with you, not the lender. A property in a thin market, an unusual build, or a location with few comparable sales is exactly where an open bridge becomes dangerous.

If you are relying on a strong sale price to make the numbers work, you are taking a market position at the worst possible time, under deadline pressure, with capitalising interest running.

If the gap is short and predictable, a simple alternative may be cheaper. A deposit bond, a longer settlement negotiated with the vendor, or a simultaneous settlement can all solve the same problem without bridging costs.

And in some cases, selling first and renting for a few months is genuinely the better financial outcome, even though it is the less appealing one.

The Alternatives Worth Knowing About

A longer settlement. If the vendor is flexible, a 90 or 120 day settlement can give you time to sell without any bridging at all. This costs nothing and is often available simply by asking.

Simultaneous settlement. Both transactions settle the same day. Clean when it works, but it depends on two chains aligning, and if one slips you have a problem.

A deposit bond or bank guarantee. Covers the deposit on the new property without releasing cash, so you are not drawing on equity before the sale completes. Useful where the issue is the deposit rather than the full purchase price.

Releasing equity before you buy. If you have time, restructuring to access equity ahead of the purchase can be cheaper and less pressured than bridging. This needs to happen before you are committed to anything.

Getting the Structure Right

Bridging is one of the areas where lender choice matters most. Maximum terms, whether open bridging is offered at all, how conservatively the end debt is assessed, whether interest is fully capitalised, and how much latitude you get if the sale runs over all vary considerably across our panel.

It is also one of the areas where the right answer is sometimes "do not do this". We have talked clients out of bridging more than once, usually because a longer settlement or a deposit bond solved the problem for a fraction of the cost.

If you are weighing up buying before selling, it is worth having the conversation before you are standing at an auction. Book a free consultation and we will work through the numbers, including what happens if the sale takes longer than you hope.

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This article is general information only and does not take your personal circumstances into account. Lender policies, rates and bridging terms change regularly and vary between lenders. Please speak to us about your situation before making a decision.