Will Stamp Duty change in the Autumn Budget 2026?

No. Prime Minister Andy Burnham and Chancellor John Healey have ruled out any change to Stamp Duty Land Tax in the Autumn Budget on 28 October 2026 (Mortgage Solutions, 28 July 2026). The first-time buyer nil-rate band stays at £300,000, with 5% charged between £300,000 and £500,000 and no relief at all above £500,000. If you're buying at or near the national first-time buyer average price of £229,107 (HM Land Registry/ONS UK HPI, June 2026), you already pay no Stamp Duty at all under the current rules, so this particular reform was never going to help you anyway. There has been earlier speculation about a broader property tax overhaul, including proposals to replace Stamp Duty and council tax with an annual charge, but none of that has been confirmed for this Budget. If your main hesitation about buying now is the hope of a Stamp Duty cut, that hope has already been ruled out in writing.

Should I wait until after the Budget to buy a house?

For most first-time buyers, no. With Stamp Duty confirmed unchanged and no other first-time buyer policy currently on the table for 28 October 2026, there is no tax reform to wait for. Waiting the roughly nine weeks (61 days) from a late-August purchase decision to the Budget date costs a typical first-time buyer around £3,557 in rent paid during the wait plus the effect of ongoing price growth on the purchase price, based on the average UK rent of £1,393 a month (ONS Price Index of Private Rents, July 2026) and 2.0% annual house price growth (HM Land Registry/ONS UK HPI, June 2026). Prices would need to swing from that 2.0% annual growth into a genuine 1.55% fall within nine weeks for waiting to break even on price alone, a reversal with no support in the transaction data reviewed. The exception is if you have firm evidence your specific local market is already falling in agreed sale prices, not just asking prices, in which case it's worth waiting for your own numbers to confirm that before you commit.

Are UK house prices about to crash?

The data doesn't currently support a crash. Rightmove's asking prices fell 2% in August 2026, the steepest August drop since 2018, and Rightmove has downgraded its full-year 2026 forecast to between 0% and -2% (Rightmove House Price Index, 17 August 2026). But asking prices are what sellers list, not what buyers pay, and they are falling partly because stock is near a 12-year high and sellers are repricing to compete. The transaction-based measure, HM Land Registry and ONS's UK House Price Index, still shows completed sale prices up 2.0% annually to June 2026, though that growth has slowed from a revised 3.0% in May. Nationwide's mortgaged-only index shows a similar slowdown, from 2.2% to 1.8% annual growth in July 2026. Falling asking prices and rising transaction prices can coexist during a slowdown; treat the asking-price headlines as a signal about seller behaviour and negotiating room, not proof that the market has turned negative.

What happens to my mortgage rate if I wait to buy?

It could move either way, and that risk sits entirely outside the Budget. The next Bank of England rate decision falls on 17 September 2026, before the Budget, and around 90% of economists polled by Reuters (13-18 August 2026) expect Bank Rate to hold at 3.75%. Bank of England governor Andrew Bailey has warned rates could still rise if the Middle East conflict keeps oil above $100 a barrel, which would push mortgage pricing up rather than down. Separately, the average two-year fixed mortgage rate already sits at 5.52% against a 90% loan-to-value best buy of 4.74% (Santander, HomeOwners Alliance/Mortgage Advice Bureau, 28 August 2026), a gap worth far more than anything the Budget could plausibly change for a first-time buyer. The practical move is to get a mortgage agreement in principle and start comparing rates now, since a decent mortgage offer is typically valid for three to six months and can be re-run if a better rate appears before you complete.

The £3,557 cost of waiting for a Budget that changes nothing

You have found somewhere you can actually afford, you're ready to make an offer, and then the headlines start: Autumn Budget, 28 October, tax changes, a new Prime Minister reshaping housing policy. So you pause. Maybe it's worth holding off a few weeks, just in case the Budget hands first-time buyers something better than what is on the table right now. That instinct feels careful. It's actually costing you money.

Waiting from today until the Budget lands on 28 October is 61 days. Over that stretch, a typical first-time buyer pays roughly £3,557 more in rent and price drift than if they proceed now, for a Budget that has already ruled out the one change that might have helped them.

What the Budget can actually do for you on 28 October

Prime Minister Andy Burnham and Chancellor John Healey have confirmed there will be no change to Stamp Duty Land Tax in this year's Budget (Mortgage Solutions, 28 July 2026; Moneyfactscompare, 3 August 2026). That closes off the reform most first-time buyers were hoping for, whether a reinstated higher threshold or a broader rethink of the tax. The current first-time buyer nil-rate band stays at £300,000, with 5% charged on the slice between £300,000 and £500,000 and no relief at all above that.

Here is the part that makes waiting even less useful: the current UK first-time buyer average price is £229,107 (HM Land Registry/ONS UK House Price Index, June 2026, published 19 August 2026). That's already comfortably below the £300,000 threshold, meaning a typical first-time buyer pays no Stamp Duty at all under today's rules. There was never a reform on offer that would have changed your bill, because your bill is already zero.

So if you're waiting on the Budget in the hope of a better Stamp Duty deal, you're waiting on a change that has already been ruled out, to fix a tax you were not paying in the first place.

The "price crash" you're waiting for isn't in the data that matters

The other reason people pause before the Budget is a vague sense that prices might fall further if they just hold on. Rightmove's asking prices dropped 2% in August 2026, the steepest August fall since 2018, and Rightmove has downgraded its full-year 2026 forecast from an earlier +2% to somewhere between 0% and -2% (Rightmove House Price Index, 17 August 2026). That sounds like confirmation a wait would pay off.

Asking prices are what sellers list. Sale prices are what buyers actually pay. They are not the same index, and right now they are not telling the same story.

HM Land Registry and ONS's UK House Price Index, which tracks completed transactions rather than seller wish lists, still shows prices up 2.0% annually to June 2026, down from a revised 3.0% in May but still positive. Nationwide's mortgaged-only measure tells a similar story: growth slowing from 2.2% to 1.8% between June and July 2026, not reversing into a fall. Stock sitting near a 12-year high is pushing sellers to reprice competitively, which shows up in asking-price data long before, if ever, it shows up in what buyers are actually agreeing to pay.

So if the only evidence behind your wait-and-see plan is a Rightmove headline, you're reading a seller-behaviour signal, not proof that the price you would actually pay is falling.

What 61 days of waiting actually costs you

Run the numbers on a typical first-time buyer purchase at the national average of £229,107 with a 10% deposit, a £206,196 mortgage at the current best 90% loan-to-value rate of 4.74% (Santander, £1,724 fee, HomeOwners Alliance/Mortgage Advice Bureau, 28 August 2026) over 25 years. Every extra day you spend renting instead of owning is a day of dead cost, not equity.

At the UK average private rent of £1,393 a month (ONS Price Index of Private Rents, published 19 August 2026), 61 days of renting costs roughly £2,791. If house prices keep rising at the current 2.0% annual pace, the same property gets roughly £766 more expensive over those 61 days. Add the two together and waiting for the Budget costs approximately £3,557, for a tax change that's not coming and a price fall the transaction data doesn't currently show.

So if you can afford to buy today, that £3,557 is the price of hesitation, not the cost of caution.

The maths, in one place:

Rent for 61 days at £1,393/month (ONS PIPR, July 2026): £2,791
Price drift on £229,107 at +2.0% annual growth over 61 days (Land Registry/ONS, June 2026): £766
Total cost of waiting until the 28 October Budget: £3,557
Stamp Duty saved by waiting, given Stamp Duty is unchanged and you pay £0 either way: £0

The break-even: how big a crash would you actually need?

For waiting to pay off on price alone, the market would need to swing from its current 2.0% annual growth rate into a genuine 1.55% fall within just 61 days, enough to offset both the rent you would pay while waiting and the growth you would otherwise miss out on locking in. That's a bigger and faster reversal than even Rightmove's most pessimistic scenario, a 2% fall spread across the whole of 2026, not squeezed into nine weeks. Nothing in the Land Registry, ONS or Nationwide data reviewed here points to a move of that size happening that quickly.

This isn't a case for never waiting. If your own local market shows agreed sale prices, not asking prices, genuinely softening, or if your personal finances are not ready, those are real reasons to hold off. But "the Budget is coming" isn't one of them once you know what is actually on the table, and our earlier look at why a Stamp Duty cut was never coming to this Budget reached the same conclusion from a different angle back in early August.

So if your wait is based on "things might get better in the Budget," you need prices to fall further and faster than anything in the current data to come out ahead financially.

The rate risk is real, but it has nothing to do with the Budget

None of this means mortgage costs are static while you decide. The next Bank of England rate decision lands on 17 September 2026, about six weeks before the Budget, and around 90% of economists polled by Reuters (13-18 August 2026) expect Bank Rate to hold at 3.75%. But governor Andrew Bailey has warned rates could still rise if the Middle East conflict keeps oil above $100 a barrel, which would push mortgage pricing higher, not lower, regardless of anything the Chancellor announces on 28 October.

The average two-year fixed mortgage rate already sits at 5.52%, against a 90% loan-to-value best buy of 4.74% (HomeOwners Alliance/Mortgage Advice Bureau, 28 August 2026), a gap worth far more over the life of a fix than anything the Budget could plausibly change for a first-time buyer. If you're still weighing up deposit size, our look at what a 5% deposit mortgage really costs you each month and the 2-year versus 5-year decision at high loan-to-value both work through that trade-off in detail, separately from anything the Budget affects.

So the lever actually worth pulling before 28 October is shopping the whole mortgage market and getting an agreement in principle, not sitting on your hands until the Chancellor speaks.

What this means for you

If you're a first-time buyer at or near the national average price, the maths points toward proceeding now rather than pausing for the Budget. Stamp Duty is confirmed unchanged, and you were not paying it anyway below £300,000. Waiting the 61 days to 28 October costs you an estimated £3,557 in rent and price drift for a reform that's not coming. Most people who run these numbers end up making the offer rather than waiting for a headline that, on closer inspection, doesn't apply to their price bracket at all. The one thing worth doing before the Budget is locking in your mortgage research and getting an agreement in principle, because that gap between the best rate and the average rate is real money, and it has nothing to do with what happens in Westminster on 28 October.