Autumn Budget 2026: Implications for Business Costs, Investment and AI

The economy is in a tougher place now compared to March

For many businesses, the biggest change since spring has been the worsening of the economy. The OBR now expects real GDP growth of around 1% in 2027, down from 1.6% in its March forecast. At the same time, inflation is expected to be around 3.4% rather than 2%. The outlook for business investment and household incomes has also weakened.^[2][3]

Higher global energy prices and interest rates (opens in a new tab) explain most of this - they raise costs directly and weaken demand as households have less money to spend. This means a firm whose own tax position has barely changed from the Budget still faces a tougher economic context.

The Budget’s macro impact is small. The OBR describes the package as broadly neutral with an absolute average net impact of around £1.3 billion a year across the forecast (just 0.02% of GDP). But the Budget still has scope to change the economics of firms and their investment decisions.^[2]

Four prices businesses should watch

A useful way for businesses to read the Budget is through four prices that shape most of their commercial decisions: labour, energy, capital and technology.

Labour

From April 2027 the National Living Wage is rising by 3.9% to £13.21 an hour. The Government expects the increases to the National Living Wage and National Minimum Wage to benefit around 2.3 million workers. Of course, this matters much more for sectors with large numbers of lower paid staff (i.e. hospitality, retail, social care, leisure and parts of manufacturing) than for firms already paying well above this level. However, the employer doesn't always end up bearing all of these costs. Some of them might be passed on via higher prices, or through slower wage growth and less hiring as well as lower margins or investment. But the split depends on how competitive the market is and how easily firms can pass costs on to customers. If demand is relatively inelastic (meaning customers are less sensitive to price changes because there are few close substitutes - think petrol) businesses can pass a larger share of higher costs on to customers through higher prices.^[1]

Energy

Higher energy prices raise costs for firms directly and can weaken customer demand indirectly. But of course the effect varies depending on the type, quantity and cost of energy that firms need. For instance, electric arc steel furnaces use large amounts of electricity, ceramics producers may rely on gas to fire their kilns and road hauliers are exposed to diesel prices. That also matters for places where these businesses account for a large share of local employment.

The Budget confirmed funding for the British Industrial Competitiveness Scheme which the Government expects to cut electricity bills by up to 25% for more than 10,000 eligible manufacturers in Great Britain from April 2027. But this doesn't catch all energy intensive firms. A large data centre, for instance, also needs substantial amounts of electricity to run and cool its servers, yet it falls outside the scheme. For road hauliers the more relevant measure is the extension of the 5p per litre fuel duty cut to 1 July 2027.^[1]

Capital

Higher borrowing costs increase the return an investment needs to make before it is considered worthwhile. This means that an investment or project that may have made financial sense last year may no longer be worth it even if expected revenues haven’t changed. The Budget also changes investment incentives. For instance the main first year capital allowance (the share of qualifying spending firms can deduct from taxable profits) rises from 40% to 50% from January 2027. From April 2027 the main writing down allowance (the rate of relief on spending not covered upfront) is reduced from 14% to 12%. The Government is also expanding the capacity of the British Business Bank and the National Wealth Fund.^[5]

Technology

The Budget includes more than £700 million of AI measures with around £500 million going towards security, resilience and building capability in the UK. For smaller firms, one of the more relevant measures is the local adoption pilot in West Yorkshire, South Yorkshire, and York and North Yorkshire where local partnerships will help businesses adopt AI and develop the skills to use it. But tech is different to more traditional capital investments. Several AI tools can, for quite cheap, be trialled through subscriptions or through features built into software that firms already use every day. But, of course, subscriptions are not the full cost of implementation. Firms also need to take into account training staff, integrating new systems and changing how work is done - and these are more important in deciding whether the investment actually produces a return.^[1]

AI use has doubled but few adopters report lower costs

The Government's 2026 AI Adoption Survey shows how quickly use is spreading. The share of UK businesses using AI doubled from 16% to 32% in a year and reached 52% among larger businesses. However, the evidence on financial returns is much weaker. Half of adopters reported higher overall productivity. They generally described the gains as modest. Only 24% reported lower operating costs and 64% have seen no immediate financial effect.^[4]

The main challenge for most firms is finding worthwhile uses for AI, changing workflows to take advantage of tools and showing that the gains justify the cost.

The automation threshold

One way to think about this is through what I call an automation threshold. Automation becomes commercially attractive when:

Higher wages and employer costs lower this threshold because the potential saving from automating (part of) the task becomes larger. Similarly, cheaper or more capable AI does the same. On the other side, higher financing costs, difficult integration, retraining and uncertain performance push the threshold up.

To note: at this stage, AI impacts the distribution of tasks; it will be some time before it changes entire jobs or careers. An AI system might, for instance, remove hours of repetitive admin whilst making the employee who remains more productive. The exact same tool could on the one hand have a super strong business case for helping a firm process thousands of transactions and a very weak one on the other hand for a smaller firm where the task only takes a few hours a week. This means the more relevant question is whether a particular application creates more value than it costs to implement for the specific task in the firm’s specific context rather than whether a company "uses AI".

Want to test this on one of your own workflows? Get in touch.

Which businesses feel the Budget most?

¹ For qualifying retail, hospitality and leisure properties in England, the threshold for full Small Business Rates Relief rises to £18,000 of rateable value from April 2027 (with tapered relief up to £21,000). For an individual shop, café or restaurant this can make a real difference, even though the measure is tiny in national economic terms.^[6]

Does the Budget solve Britain's growth problem?

Plainly, no. But it wasn’t intended to. It’s clearly been marketed as a budget to give ‘breathing space’ rather than a radical pro-growth agenda. And whilst it contains a range of useful measures on infrastructure, finance, entrepreneurship and AI, the OBR has not raised its estimate of the economy's medium term potential because of the package. The main long run challenge remains productivity. AI could form part of that story, but the gains will depend on ordinary firms finding productive uses for it, investing well and changing how work is organised. The Budget supports parts of this, but on its own it will not get AI into ordinary firms or turn adoption into higher productivity.^[2]

Four questions businesses should ask now

1. What happens to our real labour cost from April? Look beyond the wage rate itself and include employer taxes, pensions, recruitment, training and other employment costs.
2. Do planned investments still pay? Projects approved when finance was cheaper or energy prices were lower should be retested against current financing, energy and demand assumptions.
3. Which workflows are closest to the automation threshold? The obvious places to start are processes that take up a lot of staff time, involve repetitive work, have measurable outputs and are relatively simple to change.
4. How exposed are our revenues to weaker household demand? For many consumer facing businesses, the wider economic outlook will matter more than their direct exposure to any single Budget measure.

These are questions worth modelling with real numbers rather than answering by instinct.

What does this mean for your business?

A national Budget tells you very little about what your own business should do. The OBR cannot tell you how much your margins will change, whether a planned investment still makes sense or whether one of your workflows has become worth automating. Those answers depend on your own specific contexts.

This is the kind of work I do with clients. I can model how the wage and business rates changes affect your costs and margins, test planned investments against updated economic assumptions and apply the automation threshold to individual workflows to see where AI has a credible business case.

If you want to test any of these questions using your own numbers, get in touch to discuss a project.

Note: Claude Opus 5.5 was used to assist with final drafting and editorial refinement of this article.