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Agency founder reviewing equipment invoices with a specialist accountant in London office, discussing Annual Investment Allowance claims for 2025/26

Tax and Compliance

How to Use the Annual Investment Allowance for Agency Equipment Purchases in 2025/26

8 min read · ·

Photo: www.kaboompics.com / Pexels

JW

Editorial Lead · Published 16 May 2026 · Updated 17 May 2026

Editorial content from the Agency Founder Finance team. For decisions specific to your agency, book a call.

Key takeaways

  • The Annual Investment Allowance gives 100% tax relief on qualifying equipment purchases up to £1m per year in 2025/26.
  • Qualifying assets include computers, office furniture, leasehold improvements, off-the-shelf software, and fully electric vehicles.
  • Only fully electric cars qualify for AIA; petrol, diesel, and most hybrids are excluded from the allowance.
  • The £1m cap applies per group of companies, not per company, unless you elect to apportion it differently.
  • Every £10,000 of qualifying spend saves your agency £2,500 in corporation tax if you pay the 25% rate.

The Annual Investment Allowance (AIA) lets you claim 100% tax relief on qualifying equipment purchases up to £1m per year. For agency founders in 2025/26, that means every pound you spend on computers, office furniture, or software can be written off against your taxable profits in the same year. No spreading the cost over several years. No complicated capital allowance calculations. Immediate relief.

But the AIA has rules. And if you get them wrong, you leave money on the table or, worse, trigger an HMRC enquiry. Let me walk through exactly how it works for a typical agency, what qualifies, what does not, and how to plan your purchases to maximise the benefit.

What Is the Annual Investment Allowance?

The AIA is a capital allowance that gives 100% tax relief on qualifying plant and machinery expenditure. You deduct the full cost from your trading profits before corporation tax is calculated. If your agency is paying 25% corporation tax on profits above £250k, every £10,000 of qualifying spend saves you £2,500 in tax. If you are at the 19% small profits rate, it saves you £1,900.

The allowance is not new, but the £1m cap has been permanent since April 2023. That is good news for agency founders. Most agencies will never hit the cap, but knowing it is there means you can plan with confidence. The cap applies per group of companies, not per company. If you run multiple agencies under a group structure, you get one £1m allowance between them unless you elect to apportion it differently.

What Agency Equipment Qualifies for the AIA?

HMRC uses the term "plant and machinery". For an agency, that covers a broad range of assets. Here is what typically qualifies for the annual investment allowance for agency equipment purchases:

  • Computers and laptops, MacBooks, PCs, monitors, keyboards, docking stations. Every machine your team uses to deliver client work.
  • Office furniture, desks, chairs, meeting room tables, breakout area seating, filing cabinets.
  • IT infrastructure, servers, networking equipment, Wi-Fi routers, backup drives.
  • Office equipment, printers, photocopiers, shredders, projectors, screens.
  • Leasehold improvements, fitted kitchens, air conditioning, lighting systems, suspended ceilings. This is a common one that agencies miss.
  • Certain software, off-the-shelf software qualifies. Custom software development generally does not (that falls under intangible assets, not plant and machinery).
  • Electric vehicles, company cars for directors or staff that are fully electric qualify for 100% AIA. Hybrids with CO2 emissions above 50g/km do not.

I worked with a 14-person digital agency based near Manchester Northern Quarter last year. They refitted their office and bought new equipment for the whole team. Total spend was £47,300. Every single pound qualified for the AIA. Their corporation tax bill dropped by roughly £9,000 as a result. That is real cash retained in the business.

What Does Not Qualify?

Not everything you buy for the agency qualifies. The main exclusions are:

  • Buildings and land, you cannot claim AIA on the purchase price of a freehold property or the cost of acquiring a leasehold interest.
  • Cars, only fully electric cars qualify. Petrol, diesel, and most hybrids are excluded from the AIA. They fall under the main pool or special rate pool with lower writing-down allowances.
  • Assets used partly for non-business purposes, if you buy a laptop you use 60% for agency work and 40% personally, you can only claim AIA on the 60% business portion.
  • Gifts and entertainment, client hospitality, staff parties, and promotional items do not qualify. Those are revenue expenses, not capital expenditure.
  • Intangible assets, goodwill, brand value, intellectual property. These are treated differently for tax purposes.

How the AIA Interacts with Other Capital Allowances

The AIA is the most generous capital allowance available to most agencies. But it is not the only one. Understanding how they fit together helps you plan.

If you spend more than £1m in a year, the excess goes into the main pool (18% writing-down allowance) or special rate pool (6% writing-down allowance) depending on the asset type. In practice, very few agencies hit the £1m cap. If you are scaling fast and buying a lot of equipment, you might get close. But for the typical agency turning over £500k to £2m, the cap is not a constraint.

There is also the super-deduction, which ended on 31 March 2023. That is gone. The AIA is now the primary route for 100% first-year relief on plant and machinery.

Timing Your Purchases: Why the Accounting Year Matters

The AIA cap applies to your accounting period. If your agency has a 31 March year-end, the £1m cap applies to the 12 months to 31 March 2026. If you have a 31 December year-end, it applies to the period ending 31 December 2025.

Here is the practical point: if you are planning a significant equipment purchase, time it to land in the right accounting period. Suppose you know your profits will be higher in the current year than next year. Bring the purchase forward to maximise the tax relief against higher-rate profits. Conversely, if you are already making a loss, there is no immediate benefit from the AIA. You might defer the purchase until you return to profitability.

I saw a Bristol-based PR agency do exactly this last year. They had a bumper year with profits of £320k. They needed new computers and a studio fit-out costing £28,000. By ordering in March rather than April, they claimed the full AIA against 25% corporation tax, saving £7,000. Delaying by three weeks would have cost them that saving if profits dropped the following year.

Claiming the AIA on Your Corporation Tax Return

Claiming the AIA is straightforward, but it is easy to miss if your accountant does not ask the right questions. You claim it on the capital allowances pages of your corporation tax return (the CT600). Your accountant will prepare a capital allowances computation showing the qualifying expenditure and the AIA claimed.

You need to keep records of every purchase. Invoices, receipts, bank statements. If HMRC enquires into your return, they will ask for evidence that the expenditure was incurred and that the assets are used in the trade. A simple spreadsheet listing each item, the date, the cost, and the supplier is sufficient. But you need the underlying invoices to back it up.

If you use accounting software like Xero or QuickBooks, tag capital purchases to a fixed asset account. That makes it easy to pull the list at year-end. Your accountant will then prepare the capital allowance claim from there.

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Common Mistakes Agency Founders Make with the AIA

I see the same errors repeatedly. Here are the ones to watch for:

Mistake 1: Assuming all software qualifies. Off-the-shelf software like Adobe Creative Cloud, Microsoft 365, or project management tools qualifies. Custom-built software does not. If you pay a developer to build a bespoke CRM for your agency, that is an intangible asset. It is amortised over its useful life, not claimed via the AIA.

Mistake 2: Forgetting leasehold improvements. Many agencies rent their office space and fit it out. The cost of installing air conditioning, lighting, kitchen fittings, and partitioning all qualifies as plant and machinery. The cost of decorating or putting up wallpaper does not. Your accountant should split the fit-out costs between qualifying and non-qualifying items.

Mistake 3: Including assets used personally. If you buy a laptop for yourself and use it 30% for personal browsing, you can only claim 70% of the cost. HMRC will look at this if they enquire. Be honest about the split.

Mistake 4: Not claiming at all. This is the most common one. Small agencies often treat all equipment purchases as revenue expenses or simply forget to tell their accountant about capital purchases. The result is lost tax relief. If you spent £15,000 on equipment in the last year and did not claim the AIA, you overpaid corporation tax by roughly £3,000 to £3,750. That is worth correcting via an amended return.

Planning Ahead: AIA and Your Agency's Growth

If you are planning to grow your agency, the AIA is a tool to factor into your cash flow planning. Suppose you are hiring five new staff. You need five workstations, five laptops, five monitors, five chairs, and five desks. That is roughly £12,000 to £18,000 depending on quality. The AIA means you get the tax relief in the same year, reducing the net cost.

If you are moving offices, the fit-out costs can be substantial. A 2,000 square foot office fit-out might cost £40,000 to £80,000 depending on spec. Most of that will qualify for the AIA. That is £10,000 to £20,000 in corporation tax saved at 25%.

If you are considering an exit, capital allowance planning matters too. When you sell the company, the buyer will want to know the tax basis of the assets. Proper records of AIA claims help demonstrate the asset base and avoid disputes on sale.

What About the AIA for Sole Traders and Partnerships?

The AIA works the same way for sole traders and partnerships. The £1m cap applies to the business, not the individual. If you are a sole trader web designer turning over £65k, you still get the full £1m allowance if you need it. In practice, your spend will be much lower, but the principle is the same: 100% relief in the year of purchase.

The difference is that sole traders claim the AIA on their Self Assessment tax return (SA100), not the CT600. The capital allowances pages are part of the self-employment section.

When the AIA Is Not the Best Option

There are limited situations where you might choose not to claim the AIA. If your agency is making losses, claiming the AIA increases the loss but does not generate an immediate tax refund. You might prefer to defer the claim to a future year when you are profitable. HMRC allows you to disclaim the AIA and instead claim writing-down allowances over several years.

Another scenario is if you are close to the £1m cap and have assets that qualify for the special rate pool (integral features like lifts, air conditioning, thermal insulation). The AIA applies to those too, but if you have already used your cap on main pool assets, the special rate assets go into the 6% pool. In practice, this is rare for agencies.

For most agency founders, the AIA is the right choice. Take the relief now. Cash today is worth more than cash tomorrow.

How Agency Founder Finance Can Help

We work exclusively with agency founders. We see capital allowance claims go wrong all the time. Agencies miss qualifying expenditure. They claim the wrong amounts. They forget to tell their accountant about purchases made mid-year.

We build capital allowance planning into our year-end process. We ask the right questions: What did you buy this year? Are you planning any large purchases? Are you moving offices? Then we prepare the claim and file it with your corporation tax return.

If you want to review your last year's claim or plan your equipment purchases for 2025/26, get in touch. We will run through your qualifying expenditure and make sure you are claiming everything you are entitled to.

The annual investment allowance for agency equipment is one of the most straightforward tax reliefs available. Use it properly, and it puts thousands of pounds back into your business. Ignore it, and you are paying tax you do not need to.

Frequently asked questions

What is the annual investment allowance limit for 2025/26?
The AIA limit remains at £1m per 12-month accounting period for 2025/26. This cap is permanent. It applies per group of companies, not per company. If your agency is part of a group, you share the £1m allowance between all group companies unless you elect to apportion it differently.
Can I claim the AIA on a company car for my agency?
Only fully electric cars qualify for the AIA. Petrol, diesel, and hybrid cars with CO2 emissions above 50g/km do not. Those fall into the main pool (18% writing-down allowance) or special rate pool (6%). If you buy a Tesla Model 3 for your agency, you can claim 100% AIA. A Toyota Prius plug-in hybrid would not qualify.
Does the AIA cover software subscriptions like Adobe Creative Cloud?
Off-the-shelf software qualifies for the AIA, but subscriptions are treated differently. If you buy a perpetual licence, that is capital expenditure and qualifies. If you pay a monthly subscription, that is revenue expenditure and is deducted as an operating cost, not via the AIA. For most agencies using SaaS tools, the subscription cost goes through the P&L as a normal expense.
What happens if I sell equipment I claimed AIA on?
When you sell an asset on which you claimed the AIA, the proceeds are deducted from the capital allowances pool. If you sell it for more than the remaining pool value, you may have a balancing charge (taxable income). In practice, most agency equipment depreciates quickly, so there is usually no charge. But if you sell a high-value item within a few years, tell your accountant so they can adjust the capital allowance computation.

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