# Capital Allowances Sole Trader UK (2026–27): £1m AIA, Vans, Tools & SA103 Guide

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- **Summary:** Complete HMRC guide to capital allowances for a sole trader in 2026–27: £1m Annual Investment Allowance (AIA), vans, tools, 18%/6% cars & SA103 boxes.

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# Capital Allowances Sole Trader UK (2026–27): £1m AIA, Vans, Tools & SA103 Guide

**Short answer: Claiming capital allowances as a sole trader in the UK lets you deduct the cost of business equipment, commercial vans, power tools, and computers against your taxable profit on Form SA103S (Boxes 23–26) or SA103F (Boxes 49–59). Under the £1,000,000 Annual Investment Allowance (AIA), sole traders on traditional accounting can write off 100% of qualifying plant, tools, and vans in year one (adjusted for private use), while cars use 100%, 18%, or 6% Writing Down Allowances by CO2 emissions.**

> **⚡ Instant UK Sole Trader SA103 Capital Allowances, Van & Expense Toolkit (£GBP + `🔗 Embed / CSV Template`):** Calculate your UK Income Tax, Class 4 NIC, and equipment tax relief in the **[Free Self-Employment Tax Calculator](/keel/self-employment-tax-calculator/)**, export via **`🔗 Embed / CSV Template`** or save up to **5 Free Saves in your [iCloud Web Workspace](/keel/workspace/)**, explore the **[UK Self Assessment SA103 App Store Edition](/keel/cpp/uk-self-assessment-sa103/)**, or **[Download Keel on the App Store (`£0/mo` HMRC SA103 App)](https://apps.apple.com/us/app/keel-invoice-maker-receipts/id6786659713?ppid=72e63a40-1434-4f95-a3dc-62eceeb19abd&pt=127772795&ct=blog_vergi_uk-capital-allowances-sa103&mt=8)** (`uk-self-assessment`) to photograph tool, laptop, and van purchase invoices offline on iPhone.

When a UK sole trader, builder, electrician, plumber, or freelance consultant buys an asset that lasts longer than a year — such as a Transit van, a Festool mitre saw, scaffolding, a diagnostic tester, or a MacBook Pro — how that purchase reduces your [Self Assessment tax bill](/keel/uk-self-assessment-self-employed/) depends on two things: whether you use the **Cash Basis** or **Traditional (Accrual) Accounting**, and whether the asset is classified by [HM Revenue & Customs (HMRC)](https://www.gov.uk/capital-allowances) as **plant and machinery** (including commercial vans) or as a **car**.

Guided by the **Capital Allowances Act 2001** and **HMRC Self Assessment Help Sheet HS252 (*Capital allowances and balancing charges*)**, this 2026–27 guide explains how **capital allowances for a sole trader** work, how the **£1,000,000 Annual Investment Allowance (AIA)** applies, why **double-cab pick-up trucks** changed classification from April 2025, and exactly which boxes to complete on **Form SA103S** and **Form SA103F**.

For related UK tax guides, see [UK Cash Basis vs Accrual Accounting for Sole Traders](/keel/uk-cash-basis-vs-accrual-accounting-sole-trader-sa103-guide/), [HMRC Simplified Expenses Flat Rate vs Actual Costs Guide](/keel/uk-hmrc-simplified-expenses-flat-rate-vs-actual-costs-sa103-guide/), [UK SA103S and SA103F Self-Employed Form Guide](/keel/uk-sa103s-and-sa103f-self-employed-form-guide/), and [UK Sole Trader Allowable Expenses & Receipt Rules](/keel/uk-sole-trader-allowable-expenses-and-receipt-rules/).

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## Do Cash Basis sole traders claim Capital Allowances or deduct equipment as an expense?

Since the **6 April 2024** expansion of the [HMRC Cash Basis](/keel/uk-cash-basis-vs-accrual-accounting-sole-trader-sa103-guide/) (which made Cash Basis the default for all UK sole traders regardless of turnover), most capital purchases are even simpler than traditional Capital Allowances:

- **Under the Cash Basis (Default):**
  - You deduct the cost of **commercial vans, power tools, machinery, computers, laptops, and office furniture** directly as an **allowable business expense** in the tax year you actually pay for them (Box 20 on SA103S or Box 45/46 on SA103F), reduced by any private-use percentage.
  - **The one big exception — Cars:** Even under the Cash Basis, you **cannot** deduct the purchase cost of a **passenger car** as an everyday expense. To claim the purchase cost of a car used in your business (unless you use the [45p/25p simplified mileage rate](/keel/uk-self-employed-mileage-allowance/)), you must claim **Capital Allowances** in the Capital Allowances boxes of your SA103 return.
- **Under Traditional (Accrual) Accounting (if you opt out of Cash Basis in Box 8):**
  - You **cannot** deduct capital equipment (vans, tools, machinery, computers) in your normal profit-and-loss expense boxes. Instead, you add back any accounting depreciation and claim **Capital Allowances** (usually 100% in year one via the **Annual Investment Allowance**) in Boxes 23–26 of SA103S or Boxes 49–59 of SA103F.

| Asset Purchased by UK Sole Trader | How Claimed Under Cash Basis (Default) | How Claimed Under Traditional (Accrual) Accounting | Can You Also Claim 45p/25p Mileage on the Same Vehicle? |
|---|---|---|---|
| **Commercial Van (e.g., Ford Transit, VW Transporter panel van)** | 100% deducted as a capital expense when paid (less private use %) | **100% Annual Investment Allowance (AIA)** up to £1m (Box 23 / Box 49, less private use %) | ❌ **No** — once you claim capital cost or AIA on a van, you must claim actual running costs, not 45p/25p mileage |
| **Power Tools, Plant, Scaffolding, Laptops, iPhone** | 100% deducted as a business expense when paid (less private use %) | **100% Annual Investment Allowance (AIA)** up to £1m | N/A |
| **Brand-New Zero-Emission Electric Car ($0\text{ g/km }\text{CO}_2$)** | **100% First Year Allowance (FYA)** in Capital Allowances box | **100% First Year Allowance (FYA)** (Box 25 / Box 52) | ❌ **No** — cannot combine Capital Allowances with 45p/25p mileage on that car |
| **Petrol / Diesel / Hybrid Car ($1\text{–}50\text{ g/km}$ or $>50\text{ g/km }\text{CO}_2$)** | **18% or 6% Writing Down Allowance (WDA)** in Capital Allowances box (never AIA) | **18% or 6% Writing Down Allowance (WDA)** (never AIA) | ❌ **No** — choose either Capital Allowances + actual fuel/repairs OR 45p/25p mileage from day one |

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## How does the £1,000,000 Annual Investment Allowance (AIA) work for sole traders?

Under [HMRC Annual Investment Allowance rules](https://www.gov.uk/capital-allowances/annual-investment-allowance), the permanent **AIA limit is £1,000,000 per year**. It allows sole traders to deduct **100% of the qualifying cost** of plant and machinery from their taxable profits in the tax year the asset is bought:

- **What qualifies for the 100% AIA:**
  - Commercial vans and lorries
  - Excavators, dumpers, cement mixers, and site machinery
  - Power tools, ladders, test meters, and workshop equipment
  - Computers, laptops, tablets, smartphones, and printers
  - Integral features in commercial premises (electrical systems, heating, lifts)
- **What is excluded from the AIA:**
  - **Cars** (including double-cab pick-ups treated as cars under the post-April 2025 rules)
  - Assets you owned personally **before** you started using them in your business (these go into the 18% Main Pool or 6% Special Rate Pool at their **market value** on the day you brought them into the business)
  - Items given to you as a gift
  - Assets bought in the final accounting period when you permanently cease trading.

> **Note on "Full Expensing":** You may read about the UK's 100% "Full Expensing" regime in the news — that relief applies **only to limited companies paying Corporation Tax**, not to sole traders or partnerships with individual partners. Sole traders use the **£1,000,000 Annual Investment Allowance (AIA)** instead, which gives the exact same **100% year-one deduction** on new *and* second-hand vans, tools, and plant up to £1 million!

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## How do Writing Down Allowances (18% vs 6%) work for sole trader cars and older assets?

When an asset does not qualify for the AIA — most commonly a **car**, an asset brought into the business from personal ownership, or expenditure you chose not to claim AIA on — you claim a percentage of its value each year as a **Writing Down Allowance (WDA)** under [HMRC WDA rates](https://www.gov.uk/work-out-capital-allowances/rates-and-pools):

1. **100% First Year Allowance (FYA):**
   - Brand-new and unused **zero-emission electric cars ($0\text{ g/km }\text{CO}_2$)** qualify for a 100% deduction in the year of purchase.
2. **18% Main Pool Rate:**
   - New or second-hand cars with $\text{CO}_2$ emissions between **$1\text{ g/km}$ and $50\text{ g/km}$** (and second-hand electric cars with $0\text{ g/km}$).
   - Tools, vans, or equipment you owned personally before introducing them into your business at market value.
3. **6% Special Rate Pool:**
   - New or second-hand cars with $\text{CO}_2$ emissions **over $50\text{ g/km}$** (which covers almost all non-plug-in petrol and diesel cars and double-cab pick-ups classified as cars from 6 April 2025).
4. **The £1,000 Small Pools Allowance:**
   - If the remaining balance in your Main Pool or Special Rate Pool (before any private-use single-asset pool) drops to **£1,000 or less**, you can write off the entire remaining balance in one go.

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## What changed for double-cab pick-up trucks from 6 April 2025?

For years, UK builders and tradespeople bought 1-tonne double-cab pick-ups (such as a Ford Ranger, Toyota Hilux, or Isuzu D-Max with a payload of $1,000\text{ kg}+$) and claimed the **100% Annual Investment Allowance** as a commercial van. Following the Autumn Budget 2024 announcement:

- **Purchased or ordered on or after 6 April 2025 (for Income Tax):** Double-cab pick-ups with a second row of seats designed to carry four or more passengers are treated as **cars for Capital Allowances**, even if their payload exceeds 1 tonne. Because their $\text{CO}_2$ emissions exceed $50\text{ g/km}$, they no longer qualify for the 100% AIA (or immediate Cash Basis expense write-off) and instead receive the **6% Special Rate Writing Down Allowance** (adjusted for business use).
- **Transitional rule:** If you purchased, leased, or entered into a binding contract to buy a double-cab pick-up **before 6 April 2025** (with delivery before 1 October 2025), the old commercial van treatment continues to apply to that vehicle until disposal.
- **Note on VAT:** This change applies to **Income Tax / Capital Allowances**; HMRC's 1-tonne payload test for reclaiming **20% VAT** on commercial vehicles remains separate.

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## How do you adjust Capital Allowances for private use on Form SA103?

If you use a commercial van, car, laptop, or iPhone partly for business and partly for private journeys, you **never** put that asset into your general Main Pool. Instead, under **HMRC HS252**:

1. Put each mixed-use asset into its own **Single Asset Pool**.
2. Calculate the full AIA (100%) or WDA (18% or 6%) on the total cost/pool balance.
3. **Multiply the allowance by your business-use percentage** — only the business portion is entered in your SA103 Capital Allowances box.

### Worked Example: UK Electrician Buying a £24,000 Second-Hand Transit Van (85% Business Use, 15% Private Use)
- **Purchase Price:** £24,000 (ex-VAT if VAT-registered; inc-VAT if not VAT-registered)
- **Full AIA (100%):** £24,000
- **Less 15% Private Use (£3,600):**
- **Allowable Year-1 Capital Allowance (SA103S Box 23 / SA103F Box 49):** **£20,400**
- **Tax & Class 4 NIC Saved at 26% (20% Basic Rate + 6% Class 4 NIC):** **£5,304** in year one!

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## What happens when you sell or trade in a van or tool (`Balancing Charge` vs `Balancing Allowance`)?

If you claimed 100% AIA (or deducted 100% under the Cash Basis) on a van or piece of equipment and later sell it, part-exchange it, or stop trading and keep it personally:

- **Under Traditional Capital Allowances:** If the sale proceeds (or market value if you keep it) exceed the remaining written-down pool value (which is £0 after a 100% AIA claim), the difference (multiplied by your business-use %) is a **Balancing Charge** (entered in **Box 26 on SA103S** or **Box 59 on SA103F**), which adds back to your taxable profit in the year of sale.
- **Under the Cash Basis:** Any money you receive from selling equipment or a van whose cost was deducted under the Cash Basis is simply added to your **business turnover / receipts** in the year you sell it.

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## Frequently asked questions

**How do capital allowances work for a sole trader in the UK?**

When a UK sole trader buys long-lasting business assets like commercial vans, power tools, machinery, or computers, Capital Allowances let you deduct their cost from your taxable profits on Form SA103S or SA103F. Under the £1,000,000 Annual Investment Allowance (AIA), you can deduct 100% of qualifying plant, tools, and commercial vans in year one (adjusted for business use), whereas cars receive 100% (new electric), 18% ($1\text{–}50\text{ g/km}$), or 6% ($>50\text{ g/km}$) Writing Down Allowances.

**Can a sole trader claim both the 45p mileage allowance and Capital Allowances on the same vehicle?**

No. Under HMRC rules, once you choose the [45p/25p Simplified Expenses mileage rate](/keel/uk-hmrc-simplified-expenses-flat-rate-vs-actual-costs-sa103-guide/) for a specific car or van, the 45p/25p rate already includes depreciation, so you cannot claim Capital Allowances (AIA or WDA) on that vehicle. Conversely, if you claim Capital Allowances on a vehicle, you must claim actual fuel, insurance, servicing, and road tax costs for the life of that vehicle.

**Do I include VAT when calculating my sole trader Capital Allowances?**

If you are **not VAT-registered**, you claim Capital Allowances on the **total VAT-inclusive price** you paid for the van, tool, or car. If you **are VAT-registered** and reclaim the 20% VAT on your VAT return (such as on tools or a commercial van), you claim Capital Allowances on the **net (VAT-exclusive) price**. Because VAT generally cannot be reclaimed on a passenger car with any private use, even VAT-registered sole traders claim WDA on the **VAT-inclusive price of a car**.

**What happens if I bring my personal van or laptop into my new sole trader business?**

Assets you already owned personally before using them in your business do not qualify for the 100% Annual Investment Allowance (AIA). Instead, you bring them into a Single Asset Pool at their **fair market value** on the day business use begins and claim the **18% Writing Down Allowance** (or 6% for a car over $50\text{ g/km }\text{CO}_2$), multiplied by your business-use percentage.

**How are double-cab pick-up trucks treated for sole trader Capital Allowances from April 2025?**

For double-cab pick-up trucks ordered or purchased on or after 6 April 2025, HMRC classifies vehicles with a second row of seats designed for four or more passengers as **cars** rather than commercial vans for Income Tax and Capital Allowances, even if their payload is 1 tonne or more. That means new diesel double-cab pick-ups no longer qualify for the 100% Annual Investment Allowance and instead receive the 6% Special Rate Writing Down Allowance.

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