Key dates and thresholds
Qualified. Affordable. Stress-free.
Bookkeeping, payroll, VAT, tax returns and year-end accounts for clients across the UK. Done properly, filed on time.
Self Assessment
31 Jan
Filing and payment deadline for the tax year ending 5 April.
Making Tax Digital
£50,000
Qualifying income threshold from April 2026. £30,000 from 2027, £20,000 from 2028.
Company accounts
9months
To file annual accounts with Companies House after your financial year ends.
HMRC Registered Agent
We deal with HMRC on your behalf
ACCA Chartered Certified
Qualified and professionally regulated
MTD Ready
Digital records and submissions sorted
Cloud Accounting
Xero and QuickBooks, set up and supported
About Us
We handle the numbers, you run the business
Cotax Accountants provides professional accounting and tax services to individuals, sole traders, landlords and limited companies across the UK. As ACCA Chartered Certified Accountants we combine technical expertise with practical advice to help clients stay compliant, minimise tax liabilities and make confident financial decisions.
Whether you need ongoing monthly support or help with a one-off project, you will have a clear quote before any work begins, with no hidden surprises.
- Transparent quotes
- ACCA Chartered Certified
- Personal & responsive support
- Cloud accounting solutions
What we do
Everything you need to stay compliant and tax‑efficient
Self Assessment
Tax returns for sole traders, landlords and directors, with every allowance claimed.
Learn moreVAT Returns
MTD-compliant VAT preparation and submission, with scheme reviews to reduce liability.
Learn morePayroll & CIS
RTI payroll, pensions auto-enrolment and CIS returns handled on time, every period.
Learn moreLimited Company Accounts
Year-end statutory accounts and CT600 corporation tax filed with Companies House and HMRC.
Learn moreBookkeeping
Accurate monthly records in Xero or QuickBooks, reconciled and ready for reporting.
Talk to usBusiness Advisory
Forecasting, structuring and profit extraction advice for confident financial decisions.
Talk to us- Self Assessment
- VAT Returns
- Payroll & CIS
- Company Accounts
- Making Tax Digital
How it works
Getting started takes one conversation
No long onboarding, no paperwork marathon. Three steps and we are running your books.
- 1
Free consultation
Tell us about your business and what you need. There is no obligation.
- 2
A clear quote
We send a quote and a plan based on what you need, with no hidden extras.
- 3
We take it from here
We handle the handover from your previous accountant and keep you ahead of every deadline.
Quick check
Do you need Making Tax Digital?
Making Tax Digital for Income Tax is being phased in for sole traders and landlords. Answer two quick questions to see if and when it applies to you.
Based on HMRC guidance. A quick guide, not tax advice.
Pricing
Pricing that fits your business
Every business is different, so we do not publish one-size-fits-all prices. We quote based on what you actually need, and you will have your quote before any work begins.
Sole Trader
For the self-employed and landlords
Typically includes
- Self assessment return
- Quarterly bookkeeping review
- MTD income tax ready
- Unlimited email support
Limited Company
For companies and their directors
Typically includes
- Statutory accounts & CT600
- Confirmation statement
- Director self assessment
- Payroll for two directors
- Quarterly tax planning call
One-off Services
For projects, catch-ups and deadlines
Typically includes
- Catch-up bookkeeping
- Late or amended returns
- Company formation
- HMRC correspondence
Book a free consultation
Tell us about your situation and we will come back with a clear quote and a plan.
Cotax Accountants463 Streatham High Road, London SW16 3PH
Nearest station Norbury
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Frequently asked questions
Cannot see your question? Ask us directly.
How much do your services cost?
Every client needs something different, so we quote individually rather than publishing set prices. Book a free consultation and we will send you a clear quote before any work begins.
Do you only work with clients in South London?
No. Our office is in Streatham, South London, but we work with clients right across the UK, online and by phone.
I am behind with my tax returns. Can you help?
Yes. We can bring late bookkeeping up to date, file overdue or amended returns, and speak to HMRC on your behalf as your registered agent.
How do I switch to Cotax from my current accountant?
Once you are happy to go ahead, we contact your previous accountant for professional clearance and arrange the handover of your records, so there is very little for you to do.
What is Making Tax Digital for Income Tax, and does it affect me?
It requires sole traders and landlords to keep digital records and send quarterly updates to HMRC using compatible software. It applies from April 2026 if your qualifying income is over £50,000, from April 2027 if it is over £30,000, and from April 2028 if it is over £20,000. Qualifying income is your total gross income from self-employment and property. We can set you up and handle the submissions.
When is the Self Assessment deadline?
Online returns are due by 31 January following the end of the tax year on 5 April. Paper returns are due by 31 October. Any tax you owe is also due by 31 January, and if you make payments on account, the second is due by 31 July.
Which accounting software do you work with?
We work with Xero and QuickBooks, and can help you choose, set up and move across to the right software for your business.