Corporate Tax Accountants.
Our tax experts go beyond helping you fill in your tax return; we help your business approach tax complexity with scrutiny and prudence.
Understanding Corporate Tax.
Corporate tax applies to all UK-resident companies and foreign companies with a UK permanent establishment. As a fundamental business obligation, understanding and optimising your corporate tax position directly impacts your company’s profitability and cash flow management.
The UK corporate tax framework underwent significant changes from April 2023, introducing a tiered rate structure based on taxable profits. Companies must now carefully assess their profit levels and consider the impact of associated companies when determining applicable rates.
You must register for corporate tax with HMRC within three months of starting to trade. That clock starts when you begin business activity – not when you incorporate. It’s a small distinction that frequently catches new directors out.
Corporation Tax Categories.
Corporation tax is charged on three main categories:
Key Filing Requirement.
All UK limited companies must file a Company Tax Return (CT600) with HMRC within 12 months of their accounting period end date. Corporation tax payment is typically due 9 months and 1 day after the accounting period ends.
Managing Your Corporate Tax.
Our corporate tax advisory service is your premium solution for preventing the most common problems our clients faced before partnering with us, and every one of them is avoidable.
HMRC Penalties for Late Filing and Payment.
Missing the corporation tax deadlines comes with serious consequences. HMRC applies penalties immediately from the first day of late filing, with further penalties added the longer the delay continues. The longer you leave it, the more costly it becomes, and repeated late filing over the years only increases these penalties further. On top of this, interest accrues on any unpaid tax from the due date. What begins as a minor oversight can quickly spiral into a significant financial burden.
Errors in Tax Calculations.
Misapplied rates, incorrect profit adjustments, or ignoring associated company rules can lead to over- or under-payment. Underpayments attract interest and penalties. Overpayments mean lending HMRC your cash interest-free.
Missing Available Reliefs.
Many companies overpay simply because they don’t claim everything available – capital allowances, R&D tax relief, or legitimate business deductions. HMRC won’t alert you if you’ve missed something.
Chargeable Gains Miscalculations.
Asset disposals require accurate records and careful calculations. Errors can inflate your tax bill or trigger unwanted scrutiny.
What Our Expert Accountants Can Deliver.
- Confidence – accurate returns, correct payments, no deadline anxiety
- Full HMRC compliance – Complete HMRC compliance, giving your business the protection it needs.
- Legitimate tax savings – through proper planning, not aggressive schemes
- Time saved – no need to track constant legislative changes
- Year-round support – proactive advice before year-end decisions are made
Our Corporate Tax Services.
Fynax was built on a simple principle: corporation tax accountants should do more than file returns once a year.
We work with you throughout the year, monitoring legislative changes, identifying planning opportunities early, and ensuring your tax position is always clear, compliant, and optimised.
Corporation Tax Planning & Optimisation.
At Fynax, we help small and medium-sized businesses take the stress out of tax. From reducing your corporation tax liability to making the most of allowable expenses and capital allowances, our team identifies the opportunities that keep more money in your business — so you can focus on growth, not paperwork.
Group Relief Planning.
Offset losses within group structures to reduce overall corporation tax liability, with correct documentation and compliance.
Capital Allowances.
Maximise deductions on qualifying expenditure, including:
- Annual Investment Allowance
- Full expensing where applicable
We ensure every eligible claim is made correctly.
Tax Relief Specialists.
Research & Development (R&D) tax relief remains one of the most valuable – and misunderstood – tax incentives. If you’re developing new products, processes, or technical improvements, you may qualify.
We:
- Identify qualifying activities
- Prepare compliant technical narratives
- Submit robust claims fully aligned with the latest HMRC R&D tax relief scheme requirements
Claims can reduce tax or generate cash repayments for loss-making companies.
Who We Can Help.
We work with limited companies, sole traders, partnerships, and growing SMEs across Surrey & London, whether you’re just starting out or looking to scale, our corporate tax accountants are here to make sure you’re never paying more than you need to.
Accountants for Contractors & Limited Company Directors.
Running your own limited company gives you flexibility, but it also lands you with obligations that a permanent employee never has to think about. You need to file a CT600 every year, work out the most tax-efficient way to pay yourself through a mix of salary and dividends, and keep on top of IR35 and the off-payroll working rules that can change how you’re taxed on contract income.
Most contractors we speak to have a nagging feeling they’re either overpaying or missing something. We take that uncertainty away. We handle the compliance side, advise on remuneration planning, and flag any regulatory changes that could affect your position before they become a problem.
Accountants for Small and Medium-Sized Businesses.
When you’re in the early days of building a business, tax can feel like a distraction. There are products to develop, customers to win, and a hundred things competing for your attention. But the decisions you make now about company structure, expense tracking, and available reliefs will shape your tax position for years to come.
Early decisions have long-term tax consequences. We help startups register correctly, access R&D relief, and build tax-efficient foundations from day one.
Accountants for Startups & Early-Stage Companies.
As businesses grow, tax complexity increases. We support SMEs with proactive planning, capital allowances, and structure optimisation – acting as an extension of your finance team.
Get Your Corporation Tax Right — and Keep More of Your Profits.
Corporation tax mistakes are expensive. Missed reliefs, late filings, and poor planning quietly cost UK companies thousands every year.
At Fynax, we make sure:
Your CT600 is accurate and filed on time
Every allowance and relief you’re entitled to is properly claimed
Your tax position is planned before year-end — not rushed after
Book a free, no-obligation consultation and get clarity on where you stand — and where you could be saving.
