On 28 October, the Chancellor delivered the much-anticipated Autumn Budget. For construction firms, announcements such as support for housebuilding and fuel costs will come as welcome news. However, the biggest headline is a change to how you pay HMRC – and this will put real pressure on your cash flow if you aren’t ready.

In this blog, we explain what’s been announced, why mandatory Direct Debit for VAT and PAYE needs to be on every construction firm’s radar, and what you can do now to prepare.

What did the Budget announce for construction firms?

While the headline rates of Income Tax, National Insurance and VAT will stay the same, the Budget contains several announcements that matter for construction firms. These pair extra funding for housebuilding with stricter, more automated tax collection.

The announcements include:

Direct Debit instructions required for VAT and PAYE liabilities from April 2029
Mandatory electronic VAT invoicing from 1 April 2029
New HMRC powers to recover lower value tax debts from the bank accounts of those who can afford to pay
An extra £1.5 billion for social and affordable housing
No major building regulation changes for the rest of this Parliament, except on building safety
A new £4.7 billion Your First Home equity loan scheme for first-time buyers
Small Business Rates Relief threshold raised to £18,000 for retail, hospitality and leisure properties from April 2027
Tax-free mileage rate above 10,000 miles rising from 25p to 35p per mile from April 2027
National Living Wage rising 3.9% to £13.21 from April 2027
Main rate first-year allowance rising to 50% from January 2027, with the writing down allowance falling to 12% from April 2027
The 5p fuel duty cut extended until 1 July 2027.

Will Direct Debit be mandatory for VAT and PAYE?

Yes. From April 2029, you’ll need to have a Direct Debit set up with HMRC for your VAT and PAYE.

Think of it like a safety net. You can still pay your VAT and PAYE bills the usual way, as long as you pay before HMRC’s cut-off date. If a bill is still unpaid by then, HMRC will use your Direct Debit to take the balance from your account.

The rules start on 1 April 2029 for VAT, and 6 April 2029 for PAYE. The cut-off date and detailed rules haven’t been confirmed yet, so keep an eye out for further announcements.

How could mandatory Direct Debit affect cash flow?

It removes your flexibility. Right now, if cash is tight, you can time your VAT and PAYE payments around when money comes in. From 2029, HMRC will be able to collect any unpaid balance automatically from your account.

This can be a bigger issue in construction than for other sectors, as you may be waiting on payment applications, paying subcontractors up front, or carrying retentions that won’t be released for months. If you don’t have a cash flow forecast, it’s hard to know whether the money will be in the account on the day HMRC comes to collect it.

The Budget does say the government is committed to tackling late payments to support small business cash flow, but it gives no detail yet. Until it does, late payment will still be a problem you need to forecast for.

The firms that’ll feel this the least are those that can see their cash position weeks ahead. A rolling forecast shows you when VAT and PAYE are due, and whether you’ll have the funds to cover them. This is exactly what our budgeting and forecasting support is designed to do.

What should construction firms do now to prepare?

You have until 2029, but the firms that start early will be in the strongest position. We recommend:

Build a rolling cash flow forecast – include your VAT and PAYE due dates, payment application timings, retentions and subcontractor payments, so you can see gaps weeks in advance.
Set money aside for tax – moving VAT and PAYE funds into a separate account as you go makes sure the cash is there when it’s needed.
Keep paying early by your usual method –the Direct Debit is a backstop. Paying before the cut-off date keeps you in control.
Check your accounting software – ask your provider how it will support VAT e-invoicing from 1 April 2029 and watch for the detailed rules due by April 2028.
Chase what you’re owed – faster payment on your own applications and invoices is the most effective way to protect cash. If you’re a CIS contractor, our blog on CIS changes from April 2026 is a useful refresher.

What else is changing for tax payments and reporting from 2029?

Beyond Direct Debit, there are several other changes that’ll make tax collection faster and more automated. These include:

Mandatory VAT e-invoicing from 1 April 2029 – VAT invoices will need to be issued in a specified electronic format. The government will publish the full policy and technical detail by April 2028.
New powers to recover lower value tax debts from bank accounts – from July 2029, HMRC will be able to recover them in regular instalments directly from the bank accounts of individuals and companies who can afford to pay but repeatedly fail to. A Code of Practice will set out the safeguards first.
Smaller, more regular Self-Assessment payments – from April 2029, and following consultation, taxpayers who currently make large payments on account in January and July will move to more frequent in-year payments. This will affect some sole traders, including self-employed subcontractors, and company directors who file a Self-Assessment return.

What else did the Budget change for owner-managed businesses?

If you own and run your company, several other announcements affect your costs and how you take money out of the business. The main ones are:

Business rates – the Budget raises the threshold for Small Business Rates Relief from £12,000 to £18,000 (and from £15,000 to £21,000 for tapered relief) from April 2027, and freezes bills in real terms for 2027-28 and 2028-29. However, this applies to qualifying retail, hospitality and leisure properties. Most construction firms are unlikely to benefit directly, so it’s worth checking your rateable value.
Tax rates – corporation tax rates and employer National Insurance are unchanged. Income tax and National Insurance thresholds remain frozen, so as your pay rises more of it is taxed at higher rates.
Dividend tax – rates already increased in April 2026, so it’s worth reviewing how you split salary and dividends.
Selling your business – a new Capital Gains Tax Founders’ Relief will apply a 10% rate to up to £10 million of lifetime gains from April 2027. However, the lifetime limit for Business Asset Disposal Relief halves from £1 million to £500,000 from the same date, so check how this affects any exit plans.
Capital allowances – full expensing stays in place. The main rate first-year allowance rises from 40% to 50% for spending from 1 January 2027, while the main rate writing down allowance falls from 14% to 12% from April 2027. If you’re planning to buy vans or equipment, the timing and type of purchase could affect how quickly you get tax relief.
Mileage allowance – the tax-free rate of 55p per mile for the first 10,000 business miles becomes permanent, and the rate above 10,000 miles rises from 25p to 35p from 6 April 2027. This helps if you or your team drive between sites in your own vehicles.
Minimum wage – the National Living Wage rises by 3.9% to £13.21 an hour from 1 April 2027, and the rate for 18 to 20-year-olds rises to £11.27. With no change to employer National Insurance, payroll costs will keep climbing, so build the increase into your 2027/28 budget and check your pay differentials above the minimum.

Is there any good news for construction firms in the Budget?

Yes, mainly for firms working in housebuilding and affordable housing.

The Budget adds £1.5 billion to the Social and Affordable Homes Programme, supporting around 10,000 more homes, and launches the £4.7 billion Your First Home scheme for first-time buyers in England, which is expected to support around 20,000 new homes.

The government has also said there will be no major building regulation changes for the rest of this Parliament, except on building safety, and the 5p fuel duty cut is extended until 1 July 2027.

In summary

Although this year’s budget doesn’t raise the headline rates of Income Tax, National Insurance or VAT, it does change how tax is collected. Requiring Direct Debit for VAT and PAYE removes the breathing space many construction firms rely on when cash is tight.

There’s welcome support for housebuilding, but it’s the change to payments that you’ll want to plan for now. Your best protection is knowing your cash position well before every VAT and PAYE deadline.