Capital Allowances for UK SMEs in 2026

Capital allowances for UK SMEs are changing in 2026, and these changes will affect how small businesses claim tax relief on investment in plant and machinery. New rules introduced from January and April 2026 alter both the amount of tax relief available upfront and the speed at which remaining costs can be written down, making forward planning and accurate accounting more important than ever.

For many UK SMEs, capital allowances remain one of the most effective ways to reduce tax liabilities while continuing to invest in the business. Understanding what has changed and how to respond can make a meaningful difference to cash flow and compliance.

What Are Capital Allowances?

Capital allowances allow businesses to claim tax relief on qualifying capital expenditure, such as equipment, machinery, tools, and certain fixtures. Instead of deducting the full cost as a normal expense, relief is claimed either upfront or gradually over time, depending on the type of allowance used.

For capital allowances for UK SMEs, the key benefit is timing. The earlier relief can be claimed, the sooner it reduces taxable profits.

What has changed for capital allowances in 2026?

Two major changes affect capital allowances for UK SMEs in 2026.

1. New 40% First Year Allowance from 1 January 2026

From 1 January 2026, a new 40% first year allowance applies to qualifying plant and machinery expenditure. This allows businesses to deduct 40% of the cost in the year the asset is purchased, rather than spreading the relief entirely over future years.

This change is particularly relevant for SMEs making regular investments or where other allowances have already been used.

Why this matters

• Faster access to tax relief
• Improved short-term cash flow
• Greater certainty when budgeting for investment

Not all assets qualify, and correct classification is essential when claiming capital allowances for UK SMEs.

2. Writing down allowance reduced to 14% from April 2026

From 1 April 2026 (corporation tax) and 6 April 2026 (income tax), the main writing down allowance rate reduces from 18% to 14%.

This applies to assets that remain in the main pool after any first-year or annual investment allowances have been claimed.

For UK SMEs, this means:

• Slower tax relief on remaining balances
• Longer recovery period for capital costs
• Increased importance of claiming available upfront allowances

How This Affects Company Accounts

Capital allowances for UK SMEs do not affect accounting depreciation, but they do directly affect tax calculations and future liabilities.

Key areas impacted include

• Current year tax payable
• Deferred tax planning
• Cash flow forecasting
• Accuracy of capital allowance pools

With increased digital reporting expectations from HMRC, maintaining accurate asset records has become even more important.

What UK SMEs Should Do Now

Review planned capital expenditure

If your business plans to invest in plant or machinery, review whether those assets qualify for the 40% first year allowance. The timing of expenditure can significantly influence how much tax relief is available in the current accounting period.

Early review helps ensure capital allowances for UK SMEs are claimed efficiently and correctly.

Reassess existing asset pools

Assets not covered by first-year allowances will now attract relief more slowly. Reviewing existing capital allowance pools can help identify:

1. Remaining balances affected by the lower rate
2. Long term tax exposure
3. Opportunities to restructure claims

Keep clear, detailed records

Accurate records should include:

1. Purchase dates
2. Asset descriptions
3. Cost breakdowns
4. Business use proportions

Good records reduce the risk of missed relief or errors in capital allowances for UK SMEs.

Common Questions (FAQs)