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Pre-Year-End Corporation Tax Planning Checklist for UK Limited Companies — 2026

A practical checklist to help UK limited companies optimise their Corporation Tax position before the 2026 year-end. Key actions, reliefs and deadlines you should consider before 5 April 2026.

James - Cheshire Business Accountants27 February 20264 min read
Pre-Year-End Corporation Tax Planning Checklist for UK Limited Companies — 2026

Pre-Year-End Corporation Tax Planning Checklist for UK Limited Companies

Optimise your company's tax position before the 2026 year-end with this essential checklist. Discover key strategies for Corporation Tax efficiency, reliefs, and compliance updates to minimise liabilities and maximise savings.

Introduction

As the 2026 financial year approaches its close, proactive Corporation Tax planning is crucial for UK limited companies. With rates stabilised at 25% for profits over £250,000, 19% for those up to £50,000, and marginal relief in between, businesses must act now to leverage allowances, review structures, and prepare for changes like increased late filing penalties from April 2026[1][2][4]. This checklist draws on the latest guidance to help director-shareholders and SMEs streamline their approach. For comprehensive insights, explore our in-depth Corporation Tax Guide 2026 for UK Limited Companies.

Corporation Tax Rates and Thresholds Reminder

Understand your band's effective rate to inform planning:

Taxable ProfitsCorporation Tax Rate
£0 to £50,00019% small profits rate[1][2]
£50,001 to £250,00025% less marginal relief (effective up to 26.5%)[1]
Over £250,00025% main rate[1][2][4]

Group structures share limits, so review associated companies carefully[1]. Profits of £400,000, for example, incur £100,000 liability at 25%[1].

Essential Pre-Year-End Checklist

Follow this step-by-step guide to cover all bases before 5 April 2026.

1. Review Financial Position and Forecasts

  • Update management accounts to assess current profits and forecast year-end tax liabilities[2].
  • Align cash flow with upcoming Corporation Tax payments and deadlines[2].

2. Optimise Business Structure and Compliance

  • Confirm your year-end date suits tax planning and remains optimal[2].
  • Ensure Making Tax Digital (MTD) compliance for accounting software, VAT, and payroll[2].
  • Note late filing penalties rising for periods from 1 April 2026—file Corporation Tax returns promptly[2][3].

3. Maximise Capital Allowances and Reliefs

  • Time capital investments for Annual Investment Allowance (AIA), Full Expensing, or 40% First-Year Allowance (FYA)[2][3][8].
  • From 1 April 2026, main Writing Down Allowance drops to 14% (from 18%), with special rate at 6%[4][8].
  • Check R&D tax relief eligibility—claims remain vital for innovation-driven firms[1][2].

4. Director-Shareholder Remuneration Strategy

  • Balance salary vs dividends, considering dividend tax hikes from 6 April 2026 and employer NICs at 15%[1][6].
  • Accelerate dividends before higher rates apply post-6 April[1].
  • Review pension contributions (up to £60,000 annual allowance) and salary sacrifice options[2][3][5].
  • Clear directors' loan accounts to avoid charges aligned with rising dividend rates[1][6].

5. Extraction and Disposal Planning

  • In family companies, optimise profit extraction methods[1].
  • Assess Business Asset Disposal Relief (BADR) eligibility—requires 2-year ownership, 5% shares/votes; act before 6 April 2026 for 14% rate window[1].
  • Use Employment Allowance where eligible[1].

6. Advanced Considerations

  • Evaluate EMI schemes (expanded from April 2026: £120m assets, 500 employees, £6m option pool)[3].
  • Review EIS/VCT limits (up to £10m-£20m annual, £24m-£40m lifetime)[3].
  • Check Corporate Interest Restriction (CIR) reforms, Pillar Two filings (by 30 June 2026), and transfer pricing[3].
  • Conduct VAT reviews and digital record checks for MTD[2].

Why Act Now?

Changes like reduced WDA rates, EMI expansions, and compliance tightenings make February 2026 ideal for planning[1][3][4]. Associated company rules and ownership structures directly impact reliefs like BADR[1]. Tailor strategies to your profits band for maximum efficiency.

Conclusion

Implement this pre-year-end Corporation Tax planning checklist to safeguard your bottom line. Early action ensures compliance and unlocks savings amid stable yet nuanced rules. Contact Cheshire Business Accountants for personalised advice.

Tags: Corporation Tax, tax planning 2026, UK limited companies, year-end checklist, BADR, R&D relief, capital allowances

Category: Tax Planning

Sources

  1. https://teamsas.co.uk/year-end-tax-planning-2026/
  2. https://www.hwca.com/opinion/spring-tax-planning-2026-what-business-owners-need-to-know/
  3. https://www.saffery.com/insights/articles/2025-26-year-end-tax-planning-guide-for-businesses/
  4. https://www.mercia-group.com/insights/planning-ahead-of-the-tax-year-end/
  5. https://www.rathbones.com/en-gb/wealth-management/knowledge-and-insight/end-of-year-tax-tips/your-tax-year-end-checklist
  6. https://hlca.co.uk/resources/tax-planning-in-2026-27/
  7. https://www.thp.co.uk/tax-planning-advice-5th-april-2026-checklist/
  8. https://www.jamescowperkreston.co.uk/downloads/2026/2025-2026-year-end-tax-planning-guide.pdf
  9. https://www.mfw.co.uk/year-end-tax-planning-guide/

Topics

Corporation TaxTax planning 2026UK limited companiesYear-end checklistCapital allowancesR&D relief

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