Precise Tax Computations, Delivered on Time

Corporation tax and business tax preparation requires deep technical knowledge combined with meticulous attention to detail. Capital allowance calculations, allowable and disallowable expenditure analysis, group relief provisions, and R&D tax credit claims all demand expertise that takes years to develop.

Terra Global Partners provides dedicated corporation tax outsourcing services for both UK and US accounting firms. Our specialist tax team handles the computational heavy lifting, freeing your qualified staff to focus on tax planning strategy and client advisory.

UK Corporation Tax Services

  • Detailed tax computations from trial balance and statutory accounts

  • Capital allowance calculations including Annual Investment Allowance, Writing Down Allowance, First-Year Allowances, and Structures and Buildings Allowance

  • Analysis of allowable and disallowable expenditure

  • R&D tax credit calculations under both SME and RDEC schemes

  • Group relief computations and surrender claims

  • Loss relief analysis including carry-back and carry-forward provisions

  • Associated companies analysis and marginal rate calculations

  • CT600 return preparation and filing with HMRC

  • iXBRL tagging of accounts for Companies House and HMRC filing

US Business Tax Services

  • Form 1120 preparation for C-Corporations

  • Form 1120-S preparation for S-Corporations

  • Form 1065 preparation for Partnerships and multi-member LLCs

  • State corporate tax return preparation across all 50 states

  • Estimated tax payment calculations and quarterly planning

  • Fixed asset depreciation schedules under MACRS

  • Section 179 and Bonus Depreciation optimization

  • Qualified Business Income (QBI) deduction calculations

  • Multi-state apportionment and nexus analysis

Frequently Asked Questions

  • We maintain a structured CPD programme covering UK Finance Act changes, HMRC updates, IRS Revenue Procedures, and state-level tax changes. Our knowledge base is updated continuously, and all team members complete annual assessments on current tax law.

  • Yes. Our team is experienced in preparing R&D tax credit computations under the UK SME and RDEC schemes, as well as US Section 41 R&D credits. We prepare the technical narrative and financial schedules for your review and sign-off.

  • For clients with cross-border activities, we prepare transfer pricing documentation, withholding tax calculations, and treaty benefit analysis. Complex international structures are prepared with detailed notes for your specialist review.

Get Started Today

Whether you are a sole practitioner looking to free up your time or a multi-partner firm ready to scale, Terra Global Partners is here to help. Our flexible engagement models mean you only pay for what you need, and our dedicated teams integrate seamlessly into your practice workflows.

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