- United Kingdom
If you’re self-employed, a landlord, or earn extra income outside of your regular job, you’re required to file a Self-Assessment tax return by the due date.
Missing a Self-Assessment deadline can result in penalties from HMRC, whether you file your tax return late, pay your tax bill late, or fail to register on time.
If you’re looking for an affordable accountant for your Self-Assessment tax return, Cannytax offers fixed-fee services starting from £150 + VAT.
Self-Assessment is the method HM Revenue and Customs (HMRC) uses to collect Income Tax when it’s not automatically taken from your wages or pension.
In simple terms, if you earn income that’s not taxed through PAYE (Pay As You Earn), you’ll need to report it to HMRC using a Self-Assessment tax return.
It’s usually required if you’re self-employed, a landlord, a company director, or if you earn extra income outside of your regular job, such as from freelancing, dividends, or rental property.
It’s usually required if you’re self-employed, a landlord, a company director, or if you earn extra income outside of your regular job, such as from freelancing, dividends, or rental property.
You’ll need to file a Self-Assessment tax return if:
If you’re unsure whether you need to submit a return, we’re happy to offer guidance as part of our service.
Filing a Self-Assessment tax return can feel overwhelming, especially with all the rules, deadlines, and financial details involved. That’s where an accountant for a Self-Assessment tax return comes in. They simplify the entire process, ensure accuracy, and help you stay fully compliant with HMRC. Here’s how it works, step by step:
Your journey starts with an initial consultation. Our accountant will ask about your income sources, whether you’re self-employed, a landlord, a company director, or earning money outside of PAYE (like from freelancing or investments). This helps us understand your tax situation and what needs to be reported to HMRC.
If it’s your first time filing, our accountant will register you for Self-Assessment with HMRC. This ensures you get your Unique Taxpayer Reference (UTR) and are set up for the current tax year. We’ll also track your deadlines, so you don’t miss anything.
You’ll be asked to send across documents like:
Our experienced accountant knows exactly what’s needed to prepare a complete and compliant tax return.
Once all the information is in, our accountant calculates your income, allowable expenses, and any tax reliefs you can claim. We’ll double-check everything to ensure it is error-free, accurate, and fully aligned with HMRC guidelines.
Before anything is submitted to HMRC, our accountant will go over the final figures with you. This gives you a chance to understand your tax liability, ask questions, and approve the return before it’s filed.
Our accountant submits your Self-Assessment tax return online via the HMRC portal, well before the 31 January deadline (or 31 October for paper submissions). No stress, no panic, no late fees.
Once your return is filed, our accountant will confirm how much tax you owe and how to pay it. We’ll guide you on deadlines, options for payments on account, and budgeting for future bills.
Our accountant doesn’t disappear after the deadline. We’ll help you plan ahead, reduce next year’s bill through tax efficiency, and stay updated with any changes in UK tax laws.
If you’re required to complete a tax return, you’ll need to do so after the end of the tax year it relates to, which runs from 6 April to 5 April the following year. For example, the 2024/25 tax year ends on 5 April 2025, and you’ll need to submit your return after that date.
HMRC will usually send you a notice if they expect you to file a Self-Assessment. However, it’s your responsibility to check whether you need to submit one, even if you haven’t received a reminder.
Failing to file your tax return or pay any tax you owe on time could result in interest charges and financial penalties. So, it’s important to keep track of deadlines and stay on top of your tax obligations.
Your Self-Assessment accountant will need a range of documents depending on your income sources. Common documents include your UTR number, income records, details of expenses, P60s or P45s, pension contributions, dividend statements, and rental income summaries.
If you’re self-employed, a breakdown of business income and costs will also be required. Having the right documents ready can save you time, reduce errors, and make the whole process much smoother.
To prepare your Self-Assessment return, we’ll need the following:
We’ll provide a simple checklist to help you stay organised.
Self-Assessment deadlines for the 2025-2026 tax year include registering by 5 October 2025, submitting paper returns by 31 October 2025, filing online returns by 31 January 2026, and paying any tax owed by 31 January 2026.
If you’re submitting a Self-Assessment tax return, it’s important to know and meet all the HMRC deadlines to avoid fines and penalties. Here are the main deadlines to keep in mind:
Missing any of these deadlines could lead to automatic penalties, even if you don’t owe any tax.
Missing a Self-Assessment deadline can result in penalties from HMRC, whether you file your tax return late, pay your tax bill late, or fail to register on time. Understanding the potential charges and how to avoid them can save you a lot of stress and money.
HMRC may issue penalties if:
If you miss the 5 October registration deadline and don’t pay your full tax bill by 31 January, HMRC can issue a ‘failure to notify’ penalty. This is based on the unpaid tax amount and will be sent within 12 months of HMRC receiving your return.
If you submit your tax return late, even by just one day, you’ll be charged:
If you’re in a partnership, all partners will be fined if the return is late.
If you don’t pay your Self-Assessment tax bill by 31 January, you could face:
In addition to these fines, HMRC will also charge interest on the outstanding amount, so the longer you delay, the more it will cost you.
Once you receive a penalty notice from HMRC, you’ll have 30 days to pay it. Missing this window could lead to further charges.
Yes, if you have a reasonable excuse (such as a serious illness, bereavement, or technical issues), you can appeal against a penalty. HMRC will review your case and may reduce or cancel the penalty depending on your circumstances.
Yes, our accountant can absolutely handle your Self-Assessment tax return on your behalf, and for many people, it’s a smart move.
Filing a Self-Assessment with HMRC can be confusing, especially if you’re self-employed, earn income from multiple sources, or have complex finances. An experienced accountant can take the stress off your shoulders by:
Whether you’re a freelancer, landlord, small business owner, or someone with untaxed income, hiring an accountant can save you time, reduce your tax bill legally, and give you peace of mind.
You’re not legally required to use an accountant; you can file your tax return yourself using HMRC’s online system. However, if you’re unsure about the process or want to be confident that everything is done correctly, working with a qualified accountant is often well worth the investment.
Filing your Self-Assessment tax return can be stressful, time-consuming, and full of confusing rules, especially if you’re self-employed, a landlord, or earning extra income outside PAYE.
While it might seem tempting to handle it all yourself, hiring a professional accountant can make the entire process smoother, more accurate, and often more cost-effective.
Whether it’s staying compliant with HMRC deadlines or finding legitimate ways to reduce your tax bill, having an expert on your side can save you money and give you peace of mind.
Here are five key reasons to consider working with an accountant for your Self-Assessment tax return:
Yes, one of the biggest benefits of hiring a Self-Assessment tax accountant is their ability to help reduce your tax bill. They’ll make sure you claim all eligible expenses and reliefs, which could significantly lower how much you owe.
From mileage and office costs to business-related subscriptions and training, your accountant will ensure you’re being as tax-efficient as possible, all while staying within HMRC rules.
Our accountants and tax advisors in Kent charge a fixed fee starting from £150 + VAT for complete services regarding Self-Assessment tax returns.
It’s worth it when you consider the time saved, the reduced risk of penalties, and the potential for tax savings.
For a simple fixed fee of £150 + VAT, our Self-Assessment tax return service includes everything you need for a stress-free experience:
A fixed-fee accountant for Self-Assessment tax return offers clarity and peace of mind. You’ll know exactly how much you’re paying from the start, no surprise bills or hourly rates creeping up.
Whether you’re self-employed, a landlord, or earning extra income, having a fixed cost for self-assessment tax return services means you can budget confidently while staying on the right side of HMRC.
Benefits of using a Fixed Fee Accountant for Self-Assessment tax returns:
If you are looking for a fixed-fee accountant for your Self-Assessment tax return, call Cannytax now on 0203 002 2027 or email info@cannytax.co.uk.
Struggling with your Self-Assessment tax return? Contact our experienced accountants and tax advisors in Kent at 0203 002 2027 or fill in our contact form.
No matter where you are, our accountants for Self-Assessment tax returns provide professional services regarding Self-Assessment throughout England and Wales.
