CT600 filing & Corporation Tax return
Your accounts and CT600 prepared, reviewed and filed with HMRC.
FROMFrom £349 + VAT
View service Corporate & business tax specialists · Fixed price, transparent
Corporate Tax Accountants That Help You Reduce Tax & Stay Compliant
From CT600 filing to R&D relief and group structures, Corporation Tax gets complicated fast as a business grows. Our accountants handle it directly - no jargon, no chasing, just a clear scope and a fixed price before anything starts.
Upfront fixed pricingWhere the scope is clear
Corporate tax specialistsCT600, reliefs & allowances
No hidden costsEver
100% confidentialYour data is safe
TRUSTED BY BUSINESSES
Experienced accountants. Proven results.
Experlu's accountants understand Corporation Tax and deliver clear, compliant results, directly.
4.9/5Average rating from Experlu customers
100%Identity-verified accountants
4-stepQuality-check process for every accountant
UK-basedAccountants with corporate tax experience
CHOOSE THE RIGHT SERVICE FOR YOUR BUSINESS
Our most popular Corporation Tax services
Clear fixed prices where the scope is defined. Bespoke quotes for planning and complex structures. If a job falls outside the stated scope, we'll explain why and agree a new price before any work starts.
Corporation Tax planning & advisory
Forward planning to legitimately reduce your tax bill before year end.
PRICEBespoke quote
Get a quote R&D tax relief claims
Identify and claim relief for qualifying research and development spend.
PRICEBespoke quote
Get a quote Capital allowances review
A specialist review of qualifying plant, machinery and property expenditure.
FROM£249 +VAT
View service Group relief & consolidation
Structuring and relief across parent, subsidiary and group companies.
PRICEBespoke quote
Get a quote HMRC enquiry & investigation support
Direct, experienced support if HMRC opens an enquiry into your return.
PRICEBespoke quote
Get a quote KNOW YOUR DEADLINES
The Corporation Tax dates that actually matter.
Miss one of these and the penalties start immediately. This is general guidance for most UK limited companies - we'll confirm your exact dates directly.
- 3 months after you start trading: register your company for Corporation Tax with HMRC.
- 9 months + 1 day after your accounting period ends: pay any Corporation Tax owed.
- 12 months after your accounting period ends: file your CT600 return and accounts with HMRC.
- 6 years: how long you're required to keep your business records.
BUILT AROUND YOUR BUSINESS. BACKED BY EXPERTISE.
We're here for every type of company.
Whatever stage your business is at, there's a route through.
Why businesses choose Experlu
- Specialist knowledge of CT600, reliefs and allowances
- Clear, upfront pricing with no hidden fees
- Support from initial filing to group structures
- Secure, confidential and fully compliant
“Experlu filed our CT600 two weeks early and flagged a capital allowances claim our previous accountant had missed. Direct, precise and no chasing.”
OUR CORPORATE TAX TEAM
Every accountant at Experlu is checked before they touch your tax return.
We verify identity, qualifications and corporate tax experience - and monitor performance continually.
OUR 4-STEP VETTING PROCESS
1Identity & right to work verified
2Professional qualifications & references checked
3Corporate tax and accounting experience assessed
4Ongoing monitoring of client feedback
We only work with accountants we would trust with our own business.
HOW IT WORKS
Three steps. Then it is off your desk.
Choose your service
Pick a fixed-price package and check the simple scope list.
Pay securely online
Tell us the essentials and pay the price shown. Nothing hidden.
Your expert gets it done
A vetted UK professional takes over and keeps you updated.
CORPORATION TAX GUIDES
Advice and insights for businesses.
Practical guides to help you manage your Corporation Tax with confidence.
Browse all guides★R&D tax credits explainedWhat qualifies, and how to claim.▣R&D tax reliefThe latest on how the relief works.◐15 common R&D tax relief mistakesWhat to avoid when claiming.%Annual Investment AllowanceWhat you can claim, and how.▤UK tax investigations explainedWhat to expect and how to prepare.◈7 ways to reduce your Corporation Tax billLegitimate reliefs and planning.
COMMON QUESTIONS
Answers to the questions we hear most.
Do I need a specialist for Corporation Tax, or will any accountant do?+
General practices can file a basic CT600, but capital allowances, R&D relief and group structures often need specialist knowledge to get right. Our accountants handle Corporation Tax for businesses of all sizes.
Can you help with R&D tax relief claims?+
Yes. We identify qualifying R&D spend and prepare the claim, working directly with you to gather the right evidence.
What if my company is part of a group?+
We handle group relief and consolidation, including allocating losses and reliefs across group companies.
Do you support businesses under HMRC enquiry?+
Yes. If HMRC opens an enquiry into your Corporation Tax return, our specialists can represent and support you directly.
How is pricing worked out for Corporation Tax planning?+
Planning and advisory work is scoped individually based on your structure and goals. You'll see the price before any work starts.
When do I need to file my CT600?+
Generally within 12 months of your accounting period ending, though your Corporation Tax payment is due earlier - see our key deadlines above. We'll confirm your exact dates.
How quickly can you get started?+
Fixed-price services like CT600 filing can usually begin within days. Planning and advisory work is scoped after an initial conversation.
READY TO SORT YOUR CORPORATION TAX?
Get it right, the first time.
Fixed price where the scope is clear. Ongoing support when you need it. A tailored quote for planning and complex structures.