When it comes to moving home, there is no single right answer. Whether you buy or sell first depends on how much risk you can carry, what your finances can stretch to, and how much time you have. Selling first gives you certainty about your budget but can mean moving twice. Buying first protects your dream home but usually means funding two properties at once, plus a stamp duty surcharge you get back later rather than never. 

Here is what actually decides it, and what each route costs in 2026. 

Start with three questions 

What’s your situation? If you need somewhere to live the moment you sell, selling first usually means renting in between. If you have somewhere to stay, even briefly, buying first gets much easier. 

What can you afford? Buying before you sell usually means qualifying for two mortgages at once, even briefly. Selling first means you know your exact budget before you start looking. 

How much time do you have? If you’re relocating for work or a school place, waiting for the ideal sale price may not be realistic. If you have flexibility, buying first lets you find the right place rather than settling for what’s available when your buyer wants to move. 

A free online valuation is a sensible first step. Knowing roughly what your home is worth makes every decision after this one easier. 

Selling first: the pros and cons 

Upside: you know your exact budget once your sale is agreed, you become a stronger, chain-free buyer, and you avoid the cost of running two mortgages. 

Downside: you may need to move into rented accommodation if your buyer wants to complete before you’ve found your next home, you risk missing a property you love while tied up selling, and rising prices can eat into your new budget. 

Buying first: the pros and cons 

Upside: no pressure to move out while you search, you can secure a property you love without losing it, and you lock in your purchase price if the market is rising. 

Downside: you’ll likely need to fund two properties at once, your current home may sell for less if you’re under pressure to complete, and there’s a stamp duty cost upfront, covered below. 

The stamp duty catch if you buy before you sell 

Stamp duty is the part most people don’t find out about until their solicitor mentions it. 

If you complete on your new home while you still own your current one, HMRC treats you as owning two properties. That means paying a 5% stamp duty surcharge on top of the standard rate, on the full price of the new purchase. 

Say you’re buying a £400,000 home while you still own your current one. Standard stamp duty on that price is £10,000. Add the 5% surcharge on the full £400,000, which is £20,000, and your bill at completion is £30,000. 

It isn’t gone for good. If you sell your previous home within 36 months, you can reclaim the 5% surcharge from HMRC, in this example £20,000. The claim has to be made within 12 months of that sale, and it isn’t automatic. Full detail is on gov.uk’s stamp duty pages. You’ll need the extra cash available at completion, since the surcharge is due within 14 days and can’t be added to your mortgage. 

What it costs to bridge the gap 

Two mortgages. Some lenders will let you hold a mortgage on your new home alongside your existing one, if your income and debt levels support it. Usually the cheaper route where it’s possible, since you pay standard mortgage rates on both rather than short-term finance rates. 

A bridging loan is short-term borrowing secured against property, repaid once your existing home sells. These are priced monthly, and in 2026 most realistic offers land between 0.65% and 0.95% a month. A £200,000 bridging loan at 0.75% a month costs around £1,500 a month in interest, before fees, so roughly £9,000 over a six- month bridge. It’s genuinely useful when you need to move fast, but it needs a clear, realistic exit. 

How long will your sale actually take? 

As of mid-2026, the average UK home takes around 42 days to find a buyer, though this varies by area. From accepted offer to legal completion takes a further four to five months, so the whole process tends to run five to six months. 

Not every agreed sale completes, either. Industry tracking in 2026 puts the fall-through rate at close to one in four, most commonly over mortgage problems, survey issues, or a chain breaking further along. Build some contingency into your timeline rather than assuming the first offer completes. 

Where mortgage rates stand right now 

The Bank of England base rate is 3.75%. Average fixed mortgage rates currently sit at around 5.6% for both a typical two- and five- year fix, though your own rate depends on your deposit, income and lender. These move with each Bank of England meeting and Budget, so treat this as a snapshot. 

Ways to make buying first easier 

Porting your mortgage. If you have a good fixed rate, some lenders will let you transfer that deal onto your new property rather than starting again at today’s rates. It doesn’t remove the need to fund the gap, but it can protect you from a rate rise. Ask your lender early. 

Renting back or a short let. If you sell first but haven’t found your next home, you can sometimes negotiate staying on for a few weeks after completion, paying rent to the new owner. It means moving twice, but avoids carrying two mortgages while you look. 

Chain-free schemes. Some new-build developers offer part-exchange, buying your current home directly, so your purchase isn’t held up waiting for a buyer. It removes you from a chain entirely, usually in exchange for a price below open market value. 

So, which should you do? 

If certainty matters most, sell first. If finding the right home matters more, and your finances can stretch to it, buying first can work well. Most people land somewhere in between: agreeing a sale, then moving quickly to find their next home before completion. 

Talk it through with a local agent before you commit. They’ll know how quickly homes like yours are actually selling in your area right now, which is the piece of information that makes this decision easier. 

Frequently asked questions 
Do you pay stamp duty twice if you buy before you sell?

Not quite, but you pay more upfront. You’ll pay standard stamp duty plus a 5% surcharge, then reclaim that 5% once you sell your previous home, provided you do so within 36 months. 

Can you get a mortgage before selling your house?

Yes, if your income and existing debt support holding two mortgages, even briefly. Speak to a broker early to find out what you could realistically borrow. 

Is renting between selling and buying common?

Yes. It avoids the cost of running two mortgages if you haven’t found your next home yet, though it means moving twice. 

Talk to someone who knows your local market 

Timing a move well comes down to local knowledge as much as national figures. The Guild of Property Professionals is a network of around 800 independent estate agents across the UK, with one Member in each area. Find your local Guild Member for honest advice on timing your move, or get a free online valuation to see where you stand. 

For more, see The Guild’s buying and selling advice, or read the latest on mortgage borrowing and buyer confidence.