Autumn Budget Preview: What Home Sellers Should Expect

By Lisa Hayes · 26 October 2026

The Autumn Budget lands this Wednesday, 28 October, and for homeowners the headline is a quiet one: stamp duty is not expected to change, there is no annual property tax on the way, and a capital gains tax rise on your main home has reportedly been ruled out. That does not make it a non-event. The real risk to your sale this week is not a new tax, it is how the gilt market reacts, because that decides mortgage pricing for your buyer. And with the Bank of England deciding on Bank Rate just eight days later, on 5 November, the next fortnight matters more than the Budget speech itself.

I have read through the Budget previews from the HomeOwners Alliance, Zoopla, and several conveyancing and mortgage firms, and checked what is actually confirmed against what is rumour. Here is the plain-English version of what is on the table, what is not, and what I would do if I were thinking of selling this autumn.

What is actually happening on 28 October?

The Chancellor delivers the Autumn Budget on Wednesday 28 October 2026, and the Office for Budget Responsibility publishes its forecasts alongside it. That is the formal bit. The informal bit, the weeks of leaks, briefings and denials, has been running since the summer, and it has been unusually busy on property.

What makes this Budget awkward to write about is how much has already been announced or denied. Property tax rises that were unveiled at the previous Budget are already in the pipeline. Others have been ruled out in public by the Prime Minister himself. So the live questions on Wednesday are narrower than the headlines suggest: the detailed rules for the Your First Home scheme, whether anything changes at the edges of the mansion tax, and whether there are any surprises on capital gains or inheritance tax that the government has so far denied.

If you take one thing from this article, take this. For the vast majority of people selling an ordinary home, nothing that has been trailed will change the tax bill on your sale. Be wary of anyone telling you to rush or to wait on the strength of Budget rumours alone.

Is stamp duty changing in the Budget?

Almost certainly not. The HomeOwners Alliance reports that the Prime Minister, Andy Burnham, ruled out changing or scrapping stamp duty at this Budget, saying on the point: "Yes, I can say that quite clearly. That won't be happening." It also reports he rejected the idea of bringing forward plans on the scale of an annual property tax to replace stamp duty and council tax, saying "It's just not the case that we are bringing forward plans on that scale at this moment in time."

That is about as firm as political denials get, and it matters because earlier in the year there was serious speculation. In September we covered a report on the cost of stamp duty to the economy (see our piece on Scrap Stamp Duty? What the £3.1bn Tax Report Means for You), and the idea of swapping stamp duty for something annual kept resurfacing. For now, it is parked.

Stamp duty is paid by the buyer, not you. But it shapes what your buyer can afford, and therefore what they can offer. The current thresholds, per the Zoopla analysis of the system, are that stamp duty is payable on homes over £125,000 in England and Northern Ireland, and first-time buyers keep a £300,000 threshold on homes costing £500,000 or less. Zoopla points out those bands were set about a decade ago. If they stay put, as expected, you are selling into the same buyer affordability rules you have now.

What the political opposition is promising instead

It is worth separating government policy from pledges. On 7 October, the Conservatives, led by Kemi Badenoch, proposed scrapping stamp duty on main homes, abolishing the mansion tax and removing inheritance tax on the family home, according to the HomeOwners Alliance. These are opposition pledges, not law and not on Wednesday's agenda. I mention them because they can distort buyer behaviour: a buyer who believes stamp duty might disappear in a few years may, in theory, hold off. In practice, I have never seen a buyer with a mortgage offer and a deadline do that. Still, keep it in mind if a viewer asks you the question.

What about capital gains tax on my home?

This is where the rumours have been loudest, and where the reassurance is most useful. According to the HomeOwners Alliance, the Chancellor has reportedly ruled out a rise in capital gains tax. For context, residential gains are currently taxed at 18% for basic-rate taxpayers and 24% for higher and additional-rate taxpayers, after allowances and deductions. The annual exempt amount is £3,000, and a 5% surcharge applies to additional properties, according to the Drummonds Finance Group.

Here is the bit that gets lost in the noise. If the home you are selling is your only or main residence, private residence relief normally means you pay no capital gains tax at all. So these headlines matter for second homes, buy-to-lets and some inherited properties, not for most people selling the house they live in. If you want the detail on the reliefs and how to use them, our guide on how to avoid capital gains tax when selling your UK home goes through it step by step.

We looked at the same rumours a month ago in CGT Budget Rumours: Is Your Family Home Really at Risk?, and the answer then, as now, is that your main home is not the target. If the Chancellor surprises everyone on Wednesday, I will update this piece. I would not bet on it.

Is the mansion tax changing?

The High Value Council Tax Surcharge was announced at the Budget on 26 November 2025. Here are the facts as reported by the HomeOwners Alliance and Zoopla:

• It applies to homes in England valued at £2 million or more.
• It costs £2,500 to £7,500 a year, on top of council tax, depending on value. Zoopla's earlier analysis put the £2 million charge at £2,500 and the £5 million-plus charge at £7,500.
• It starts in April 2028, collected with council tax, and the owner pays, not the occupier.
• The OBR expects it to raise about £0.4 billion in 2029-30 and estimates around 165,000 households will be affected.
• Homeowners are expected to find out in autumn 2027 whether they are caught.
• A consultation ran from 19 May to 14 July 2026, and the government is still considering responses, including a possible "non-resident premium" for overseas owners.

Last month there was a lot of chatter about the threshold dropping to £1.5 million. I covered that in Mansion Tax at £1.5m? 222,800 Homes Could Be in the Grey Area. The latest reporting is that the Chancellor has ruled that out ahead of the Budget, though the Setfords preview cautions that some reports are conflicting and nothing is confirmed until the speech. Treat it as unlikely rather than dead.

If you own a £1.8 million home in Surrey, this is the only property item on Wednesday that really matters to you. Zoopla's earlier analysis found that about 85% of the homes affected are in London and the South East. For everyone else it is background noise.

• £2mthreshold for the mansion tax (England)
• £2,500–£7,500annual surcharge, from April 2028
• ~165,000households affected, per OBR estimate
• 5 Novnext Bank of England rate decision

Does the Budget change the Your First Home scheme?

This is the one measure where we expect genuinely new detail on Wednesday. The HomeOwners Alliance says the full rules for the Your First Home scheme in England are due at the Budget. As described so far, it is aimed at new-build homes: the buyer puts down a 2.5% deposit, the government provides a 20% equity loan with an initial interest-free period, and a mortgage covers the remaining 77.5%. There would be household income caps and local price caps. A First Time Buyer ISA is also planned, according to the Setfords preview.

We went through the scheme in detail in Your First Home Scheme: 2.5% Deposit, But Not for Most Sellers, and my view has not changed. Because it is limited to new-build homes, it does very little for someone selling a three-bed semi built in 1965. It is useful if you are a developer, or if you are selling a new-build yourself and want a bigger pool of buyers. For the typical existing-home seller, it is a sideshow.

That said, watch the small print on Wednesday. If the price caps or income caps turn out to be generous, and the scheme is extended beyond new-builds, that would be a real boost to first-time buyer demand, and that is the group which props up the bottom of most chains. I would put the odds of an extension at low, but it is the piece of news most likely to make me rewrite this section.

What could the Budget do to mortgage rates?

This is the part nobody puts in the headline and the part I would spend my time on if I were selling. Fixed mortgage rates are priced off swap rates, which move with expectations for inflation and interest rates, as the Drummonds Finance Group explains in its Budget preview. A Budget that markets read as inflationary, or one that implies more government borrowing, can push those expectations up, and with them the price of fixed-rate mortgages.

We have seen how sensitive things already are. Earlier this month I wrote about Mortgage Rates Hit 6% and 30-Year Gilt Tops 6%. The HomeOwners Alliance notes that average mortgage rates have reached 6%, which it links to pressure on buyers and remortgagers. Rightmove, in its latest index this month, said much the same thing: asking prices were up about 1% but mortgage rates are biting.

Why does this matter to you as a seller? Because your buyer's budget is set by their lender's rate, not by what they would like to pay. Every 0.25 percentage point added to a rate trims what a typical buyer can borrow. If rates rise after Wednesday, it will not crash your sale, but it can nudge offers down and stretch negotiations. If gilts rally, the opposite can happen.

How does the Bank of England decision on 5 November fit in?

Quite a lot, because the two events are linked. The Bank of England's next rate decision is on 5 November 2026, eight days after the Budget, and comes with a full Monetary Policy Report, according to Drummonds. Bank Rate is currently 3.75%. We covered the last decision in Bank Rate Held at 3.75% — But Three Members Voted for a Rise, which showed some committee members already leaning towards a hike, and our piece on Inflation Hits 3.5%: Why a Rate Rise Is Now Likely for Sellers explains why.

The Budget feeds into that. The Bank will be watching what the Chancellor does with borrowing, with energy support and with spending commitments, because all of them can add to inflation. If the Budget adds spending without matching revenue, the case for a rise gets stronger. If it looks tight, the Bank has more room to hold.

I would not try to second-guess either. What I would say is that the two events together create an unusually noisy fortnight for anyone who needs a mortgage, and a noisy fortnight is a bad time to base a big decision on a rumour you read in a newspaper.

How could the Budget affect energy bills and the cost of owning a home?

Not a tax on your sale, but relevant to your buyers' budgets. The HomeOwners Alliance reports the Chancellor is reportedly considering a package of more than £1 billion for lower-income households, possibly including raising the Warm Home Discount from £150 to £250 for around six million households. None of that is confirmed. Cornwall Insight, cited by the HomeOwners Alliance, forecasts the price cap could rise 16% in January 2027 to £1,999 a year.

Why mention it? Because lenders and buyers factor running costs into affordability, and because energy efficiency is rapidly becoming part of the selling story. The Boiler Upgrade Scheme, currently worth £7,500 per grant and £9,000 for eligible off-grid homes replacing oil or LPG, is reportedly facing cuts to help fund defence spending, though nothing is confirmed. If you were planning to sell a home with an old boiler and hoped a buyer would take advantage of the grant, that could become a weaker selling point.

We also wrote earlier this month about Flood Certificates Are Coming, another sign that the cost-of-running side of a home is moving into the foreground. A home that is cheap to heat and insure is easier to sell than it was five years ago.

What does it all mean if you are selling this autumn?

I will be direct. Do not wait for the Budget, and do not rush because of it. The things most likely to change your sale price are not in the Chancellor's red box. They are the state of your local market, the price you start at, the condition of your home, and the rate your buyer can get.

Look at the market you are selling into. Our recent coverage has been fairly consistent: the ONS reported house price growth slowing to 0.9% (see UK House Price Growth Slows to 0.9%), Landmark Information Group found agreed sales fell 11% in the third quarter (Autumn Housing Rebound Fails), and the RICS surveyors' price balance sits deep in negative territory. This is a market where buyers have choice and sellers need to be realistic. The Budget, if it behaves as expected, will not change that. For the broader numbers, our UK house prices 2026 guide collects the key indices in one place.

Four practical steps for this week

First, get a realistic value. Start with the evidence, not the hope. Our guide on how much your house is worth explains how to cross-check online estimates against recent sold prices, and you can start a valuation in a couple of minutes.

Second, speak to your own mortgage adviser if you are buying onwards. If you have a buy lined up, ask about a rate lock or a product you can secure now. Remortgage rates can often be secured three to six months ahead, per Drummonds, and the same logic applies to a purchase mortgage in principle. Do not assume rates will fall after the Budget.

Third, get your paperwork in order. A slow conveyancing process costs more in a nervous market than it does in a hot one, because buyers use any delay as a reason to renegotiate or walk. Our seller's guide to conveyancing covers what to prepare before you accept an offer.

Fourth, understand your fee options. If you are weighing up estate agent costs against other routes, our estate agent fees guide sets out what you are likely to pay in 2026.

When does a quick sale make sense around a Budget?

Not everyone has the luxury of waiting for a perfect buyer. If you have a chain that has collapsed, a probate sale, a rental you want out of before the April 2027 landlord tax rise, or a mortgage ending on a rate you cannot afford, then certainty can be worth more than the last few percent of price. A cash buyer is not affected by swap rates or the Bank of England. They are not waiting on a lender's valuation, and they are not looking at the gilt market on Wednesday afternoon.

The trade-off is price. Cash buyers generally offer below open-market value in return for speed and certainty, and how much below varies by buyer and property. That is why I always suggest comparing more than one offer. Our guides on cash house buyers and on selling a house fast explain how the process works and what is reasonable to expect.

If you are a landlord selling

This site is mainly for homeowners, but it is worth a line for anyone with a rental. The HomeOwners Alliance confirms that property income tax rises by 2 percentage points from April 2027, to 22% for basic-rate, 42% for higher-rate and 47% for additional-rate taxpayers, with the OBR estimating about £500 million a year in extra tax and limited companies unaffected. That is already announced. If that changes your calculation, the Budget will not change the maths further unless there are surprises on capital gains. Speak to an accountant before you list.

What should you watch for on Wednesday?

Here is my short list of the things that would genuinely change the picture, in order of importance for a typical seller.

What to watch	Current position	Why it matters to a seller
Gilt and swap rate reaction	Average mortgage rates around 6% (HomeOwners Alliance)	Sets what your buyer can borrow
Stamp duty	PM says no change	Buyer affordability stays the same
Capital gains tax	18% / 24% on residential gains; rise reportedly ruled out	Mainly affects second homes and investors
Mansion tax threshold	£2m from April 2028; £1.5m reportedly ruled out	Matters for high-value homes in London and the South East
Your First Home scheme detail	2.5% deposit, 20% equity loan, new-builds	Could widen buyer pool for new-builds
Bank Rate decision, 5 November	3.75%; some members previously voted to raise	Direction of fixed rates into winter

What is the outlook after the Budget?

My honest view: expect a muted result. A government that has already pre-announced the property measures, denied the scary ones and is wrestling with inflation near 3.5% does not have much room for a house-price-moving surprise. The most likely outcome is that property takes a back seat on Wednesday and the story moves on to the Bank of England on 5 November.

Beyond that, the fundamentals are what they were last week. Price growth is slowing, with the ONS recording annual growth of 0.9% in its latest release. Sales agreed are soft. Mortgage costs are the biggest brake on demand. In that kind of market, the sellers who get a deal done are the ones who price to the evidence, present the home well and keep the sale moving. That has nothing to do with the Chancellor.

If the Budget does spring a surprise, I will publish an update here. In the meantime, if you are thinking about selling, you can see what a range of buyers would pay without committing to anything. Compare offers for your home and decide on your own terms, rather than on a rumour.