Self Assessment Tax Returns in Oxfordshire
For individuals, landlords, sole traders & company directors in Oxford, Witney, Abingdon, Bicester & beyond
Stress-free Self Assessment — filed accurately and on time
Self Assessment doesn’t have to be stressful. Whether you’re a sole trader, landlord, company director, contractor, or have additional income (dividends, crypto, investments, Airbnb/FHL), Modus Accountants will prepare and submit your return accurately, claim all reliefs available, and help you plan for future payments so there are no surprises.
What our Self Assessment service includes
- Fixed-fee quote and checklist of what we need.
- Preparation & submission of your tax return to HMRC.
- Reliefs & allowances review (pensions, Gift Aid, capital allowances, property expenses, BADR on qualifying gains, etc.).
- Landlord support: mortgage interest restriction, repairs vs improvements, FHL rules, mileage, use of home.
- Capital gains calculations and reporting (incl. UK property CGT where applicable).
- Payment planning: estimates for 31 January balancing payment and Payments on Account (31 January & 31 July).
- MTD readiness: guidance on Making Tax Digital for ITSA and setting up compliant records early.
- Optional bookkeeping and cloud software setup (Xero/QuickBooks/FreeAgent) to make next year easier.
Who needs to file a Self Assessment?
You’ll typically need a return if you:
- Are self-employed or in a partnership.
- Are a company director with dividend income.
- Receive rental income (including Airbnb/FHL).
- Have investment, foreign, or crypto income/gains.
- Need to declare capital gains (e.g., property or shares).
- Earn over £100,000 or need to repay Child Benefit (HICBC).
Serving clients across Witney, Oxford, Abingdon, Bicester, Didcot, Carterton and West Oxfordshire.
Why Oxfordshire clients choose Modus
Deadlines at a glance
Missed deadlines can mean penalties and interest — we’ll keep you on track.
MTD for Income Tax — what to know now
Making Tax Digital for ITSA is scheduled to start from April 2026 for self-employed individuals and landlords with
income over £50,000, and from April 2027 for those over £30,000. Moving to digital records now(Xero/
QuickBooks/FreeAgent) will make the transition smoother — we’ll set you up and train you.
FAQs — Self Assessment (Oxfordshire)
Do you work with first-time filers?
Yes — we register you for Self Assessment, explain what’s required, and handle everything end-to-end.
I’m a landlord in Abingdon can you help with expenses and Section 24?
Absolutely. We’ll optimise allowable expenses, clarify mortgage interest rules, and plan your tax position.
Can you file late returns and deal with HMRC?
Yes we can submit overdue returns, help reduce penalties where possible, and liaise with HMRC on your behalf.
What records do you need?
Income/expense summaries (or bank-feeds via cloud software), P60/P45/P11D, dividend statements, rental statements, pension/Gift Aid details, and any capital disposals.
Next steps
Avoid last-minute stress and unexpected tax bills. Let Modus prepare and submit your Self Assessment early and put a plan in place for the year ahead.
📞 Call us today on 01993 220132 or click here to book your free 30 minute discovery call.
Our Google reviews
Sam Olliver
08:43 14 Jun 25
I had a great experience with Modus Accountants for my 2024/25 self-assessment. Lauren, Jenna and team were professional, responsive, and made the whole process smooth and stress-free. Everything was handled quickly, with clear guidance and easy access to documents via the client portal. Highly recommend!
Alex Gavrilovic
12:54 28 May 25
The team at Modus couldn’t be more helpful. Every year I get a reminder that my self assessment is due and a tick list informing me exactly what information I need to return.
Samantha Newport made it simple, hassle free and an enjoyable experience.
I also managed to complete it by May which is much better than rushing to hit the January deadline.
Samantha Newport made it simple, hassle free and an enjoyable experience.
I also managed to complete it by May which is much better than rushing to hit the January deadline.
Terri Brown
20:09 02 May 25
I cannot recommend Jenna and Brooke at Modus Accountancy Firm enough! Over the past five years, they have been incredible supporters of my business, Sanctum Hair. Their expertise, professionalism, and friendly approach have made all the difference. Thank you, Jenna and Brooke, for your outstanding support! 😀
Gopu Khatri
01:49 02 May 25
For the past two years, Jenna at Modus Accountants has expertly handled our property company accounts. As an HKG-based client unfamiliar with UK accounting practices, I've asked countless questions. Jenna and the team have consistently responded with patience and clarity, ensuring I understand every detail. Their expertise and responsiveness have been invaluable. I highly recommend Modus Accountants; they've truly helped me feel confident in my financial decisions.
rob
16:36 30 Apr 25
Modus have been our accountants for several years now and always done an amazing job and very helpful at the right times when running your own business. Recently they have helped us out by stepping in on a temporary basis while we look to re-hire on our accounts side. Thanks to Layla and Sam from all of us at WM Air Conditioning.
Mark Bryant
16:25 28 Apr 25
I am happy to recommend Modus Accountants who have provided us with diligent and professional accounting services for many years across a significant portfolio of businesses. They offer good value for money and are consistently responsive and friendly. A special mention to Nick who has been our main point of contact for many years and delivered for us time and again.
S A
11:42 28 Apr 25
I have had the pleasure of working with Nick and Margaret at Modus Accountants (Formerly Aries and then Modus Pease) for the past 18 years within my role as a bookkeeper for a small building company. Their professionalism, expertise, and unwavering support have been invaluable to me. No matter the query, they are always thorough, reliable, and incredibly approachable. Both Nick and Margaret understand the needs of a small businesses like ours, and I highly recommend them. Thank you, Modus for your outstanding unwavering service!
Cara Brandi
11:29 28 Apr 25
Working with Lauren and the whole team at Modus has been great! They do everything around my accounting and tax preparation so timely and efficiently. Lauren has been particularly good and making the tax preparation process as simple and straightforward as possible, and because my tax is prepared well in advance of being due I can implement any changes needed early in the new tax year for maximum benefit.
Thank you, Lauren and thank you Modus!
Thank you, Lauren and thank you Modus!
Steeve
10:39 28 Apr 25
I am writing to express my satisfaction and recommendation for the services provided by Modus Accountant Big thank you Lauren, Jenna, Mark and the rest of the team. It has been a couple of years since I switched my business accounting needs to their firm, and I must say that I am extremely pleased with their professionalism and expertise.
The team at Modus Accountant has consistently demonstrated a high level of proficiency in handling my financial matters. Not only are they knowledgeable and efficient, but they also exhibit a genuine kindness and dedication to their clients. I have found their services to be invaluable in helping me navigate the complexities of financial management.
The team at Modus Accountant has consistently demonstrated a high level of proficiency in handling my financial matters. Not only are they knowledgeable and efficient, but they also exhibit a genuine kindness and dedication to their clients. I have found their services to be invaluable in helping me navigate the complexities of financial management.
Steve O'Hara
12:32 25 Apr 25
We hold multiple accounts with Modus accountants, Business & Personnel, we find that their knowledge base and communications between all their departments is exceptional and always on point. Any financial issues that need resolving these are completed in a very professional manner and within expected time frames. I would absolutely recommend Modus accountants to any Personnel, Business or Corporation for all aspects of Accounting & Tax liabilities, we are very satisfied with their appointment.
Ken Cheng
15:26 21 Apr 25
Decided to switch accountant for my IT Limited company to a local company in Oxford area and found Aries Accountants, who are now Modus. They have now been my accountants for both business and self assessment services for over ten years and I have never encountered any issues during this time. All returns have been submitted to HMRC on time and with no issues. I wish to thank Nick and his team for all their help and support since I first stepped into the doors at Aries to now where they have now grown into Modus.
NT Labs
10:47 16 Apr 25
We have dealt with Modus Accountants for many years and they have supported us as our business has grown with excellent service and advice along the way. We would strongly recommend.
Paul Mattingley
20:18 07 Apr 25
Modus accountancy are the go to place,
We are a plumbing and heating ltd company and feal we are an excellent company supplying a competitive reliable service.
This why we are associated with modus as their services and advise is fantastic .
My bookworking skills are not the best but modus keeps me on the straight and narrow.
Services supplied from modus;
Payroll , vat returns , end of year accounts
Any email / phone call answered efficiently
Main people I deal with;
Nick , if nick doesn’t know the answer to a question nobody does , all ways my first port of call to any problems
Margaret, payroll always prompt even on my short notice 🤣 and always a chat
Brooke, deals with my Xero software discrepancy’s and rectifies any other issues I have
Modus team very efficient and feal I personally I am in a small family run business and can call at any time for advice
To sum up ;
Run your business to your best capacity
Modus will take care of the rest
Thanks to all at modus
Regards Paul
We are a plumbing and heating ltd company and feal we are an excellent company supplying a competitive reliable service.
This why we are associated with modus as their services and advise is fantastic .
My bookworking skills are not the best but modus keeps me on the straight and narrow.
Services supplied from modus;
Payroll , vat returns , end of year accounts
Any email / phone call answered efficiently
Main people I deal with;
Nick , if nick doesn’t know the answer to a question nobody does , all ways my first port of call to any problems
Margaret, payroll always prompt even on my short notice 🤣 and always a chat
Brooke, deals with my Xero software discrepancy’s and rectifies any other issues I have
Modus team very efficient and feal I personally I am in a small family run business and can call at any time for advice
To sum up ;
Run your business to your best capacity
Modus will take care of the rest
Thanks to all at modus
Regards Paul
Tim Wann
12:49 02 Apr 25
Very professional, excellent advise and very easy to deal with. We highly recommend their services
Graeme Christianson
19:00 28 Mar 25
Since transitioning to Modus a couple of years ago, I have been very happy. The whole team is friendly, efficient, and capable. Sam in particular has helped us to improve the business's financial performance.
David O'Neill
19:00 10 Mar 25
Samantha at Modus Accountants has been super helpful and great to work with. She’s always quick to respond, knows her stuff, and goes the extra mile to make things easy. Her advice has been a huge help, and I’d definitely recommend her and the team to anyone who needs a reliable accountant!
Daniel Polak
16:20 01 Mar 25
I needed help with my self assessment tax return, so went to Modus. I could not have asked for more; the help and support was professional, quick and most importantly, very helpful. Modus managed to find helpful solutions for my tax needs which a Big Four accountant had failed to do in previous years. A big thank you to all the team and I would thoroughly recommend anyone looking for tax or business planning support.
Paul Clark
15:41 20 Jan 25
Modus Accountants offer a professional service with quick response time and great knowledge we would recommend for accountancy services and business support.
William Antwi
10:35 02 Jan 25
I am very happy with Modus services. I always have quick replies and helpful advices. They know how to suite their services for my company's personal needs. Thank you for everything.
Gergo S
22:33 22 Dec 24
Great Accountants, reasonably priced.Friendly and knowledgeable staff.
They have been looking after me and my business for 3 years, and will definitely stay with them.
They have been looking after me and my business for 3 years, and will definitely stay with them.
Trish Williamson
14:17 20 Sep 24
Nick and Margaret could not have been more helpful when my husband was unable to continue his business due to ill health. Their unfailing patience and ability to advise in words of one syllable was particularly valuable in helping me to navigate closing the company. They have also looked after our personal tax returns for many years. Again, the service they have provided has been second to none. They both come highly recommended.
Luke Goodman
16:11 27 Jun 24
New business owner here, modus have been a great addition to my businesses power team providing exceptional customer service and also helping me understand the most cost effective way to set up my accounts. Great staff who are down to earth/ easy to talk to and always happy to help
I look forward to continuing our journey together
I look forward to continuing our journey together
Jonathan Howat
16:54 01 Jan 24
Our company has been under the guidance of Rupert Pease, Margaret Heaton and Nick Clark for many years, where our business has relied on their professionalism, support and attention to detail, which has been amazing. I expect that ethos to continue with the new company Modus Pearse and from current performance those targets are being addressed - thank you
Jill
14:04 26 Sep 23
I've been working with Modus for a couple of years now and they've never failed to be absolutely fantastic, and provide a broad, helpful, and efficient service. Would recommend to anyone.
dan arnold
07:34 23 Sep 23
Both Adam and Jenna have helped me establish my business as a sole trader , assisted with growing the business into a limited company , and guided me through the struggles of understanding VAT and corporation tax,
The software supplied has been the major factor in giving me back time to allow me to grow the business and their help in setting everything up and understanding it has been vital.
Highly recommend this team as they have a very personal approach in finding what you need to best suit your plans.
The software supplied has been the major factor in giving me back time to allow me to grow the business and their help in setting everything up and understanding it has been vital.
Highly recommend this team as they have a very personal approach in finding what you need to best suit your plans.
Ben Croft
11:28 08 Sep 23
Excellent Accountancy service from the Modus Team.
I love to understand the in's and out's of my business, and the team have gone above and beyond with their support (and patience!). Their pricing structure is clear and their service is top notch. Highly recommend if you need quality accountancy for your business.
Shout out to Sam & Christian! - Thank you.
I love to understand the in's and out's of my business, and the team have gone above and beyond with their support (and patience!). Their pricing structure is clear and their service is top notch. Highly recommend if you need quality accountancy for your business.
Shout out to Sam & Christian! - Thank you.
Steph Judd
12:26 06 Sep 23
Adam is a great asset to Modus Accountants. Business Accounts can be at times confusing. Adam is patient, helpful and very quick at responding. Thank you for all your help.
Raymond Ng
18:10 25 Aug 23
Modus Accountants are all very professional, very responsive and attention to details. With no doubt it has gained my loyalty to use Modus to handle my day to day accounting needs.
Nath Lewis
15:18 25 Aug 23
modus was recommended by my accountant, I have always found their customer service excellent. They are extremely professional and nothing is too much trouble. I highly recommend them
Derek Thirkell
12:00 24 Aug 23
Great team of people to deal with. Brooke and Samantha look after our end of year accounts and are very supportive when we contact them for advice. Brooke is so helpful running our payroll each month and somehow manages to make sense of our Vat returns on a quarterly basis. The business has flourished since we swapped over to Modus 2-3 years ago thanks to the help of the team as a whole. Thanks for your help and support guys.
Graham Hobbs
11:44 24 Aug 23
I have joined Modus as a new customer this year, and have been very impressed with their efficient service. Quick responses and matters resolved in an uncomplicated manner.
Justen Hyde
10:52 24 Aug 23
Excellent accountants and a pleasure to work with. Always quick to respond to queries, and unfailingly pleasant, polite and helpful. Very keen to have a good understanding of our business so that they can work with us more efficiently. In addition to the day-to-day accounts, as our business has grown advice from Modus has really helped us to build strong internal administrative and accounting structures.
Samantha Farr
10:30 24 Aug 23
We have been working with Brooke for a number of years and she has always provided an outstanding service! She is very efficient, professional and fantastic with her time keeping. Could not recommend higher!
Satijana
23:02 13 Aug 23
Sam and Mark have been excellent. They have helped many of my property investor clients with their professional service and I will continue to recommend them.
bamd ltd
10:04 09 Aug 23
Sam and Jenna are fantastic. Sound advice coupled with timely reporting and efficient service. Recommend highly.
Tom Badrick
09:45 09 Aug 23
The team at modus are very professional I would highly recommend there services.
Jamie Rickard
10:35 08 Aug 23
Sam has been our accountant for the past 3 years now, his advice and guidance is always second to none, all of our filing is completed in a timely manor and always correct. Could not recommend Sam or Modus more! Thanks again.
Robert Arnold
10:12 22 May 23
Modus have been super helpful to me, with no question too big or small, highly recommend.
Heather Mungall
13:07 18 Jan 23
Sam was very efficient, knowledgeable and professional from start to finish. Everything was explained clearly and all responses were very prompt. A1+ Thank you Sam
Mike Sinclair
16:31 06 Jan 23
I had the pleasure of dealing with Sam Newport. I can't fault the service provided. Clear communication alongside a quick concise turnaround with my tax returns for the year made it an all round satisfactory experience. With the addition of some unexpected savings, highly recommended.
Thomas Herbert
09:32 26 Oct 22
I have had nothing but a first-class experience since joining Modus Accountants. As well as being extremely knowledgeable of the financial practices, they have supported and coached my overall business growth!
MAOX Scheers
14:27 05 Sep 22
I work with Modus for a couple of years and very happy about their service. They are always very responsive and helpful. All accounts are prepared and submitted on time, even in advance. They give responses and answer my questions quick and clear. My contact person is Samantha Newport and I love working with her.
John-William O'Dwyer
09:23 24 Aug 22
Great help in the transition from Kavangh's to Modus, and helping me work with new accountant etc. Good advice MTD too! Thank you. It has been greatly appreciated.
Mystic Games
11:44 23 Aug 22
Switching to Modus has absolutely changed my business, they are so much more than accountants, they offer so many other services and the quality of work and support is above and beyond. I wish I signed up so much sooner than I did, it would have saved me so much money and headaches!
George Roussos
14:57 06 Jul 22
Modus has been looking after our company accounts and fillings for the past couple of years and we are delighted with the quality of the support received. Highly recommended.
Billie Tweedy
14:29 06 Jul 22
Quick, simple and easy. James answers any queries quickly and clearly. Happy to recommend Modus.
Ian Morris
06:10 29 Jun 22
Having taken the step back in 2017 to set up my own business it has been one that I have been very lucky with.
Modus came into the picture within the last 12 months due to taking over from the previous accountants I was using as they had decided it was time for them to retire.
I was a little nervous at first however from the first conversation with Samantha and the team at Modus I was given a huge boost and relief as their professionalism and methods of business is phenomenal.
The advice and guidance already given to me by Modus has been amazing and one I truly appreciate and will continue to learn from so in my opinion I owe Modus a massive thank you for the work they do.
I would highly recommend Modus to any company as both the work and professional service they deliver is first class.
Ian Morris
Managing Director
UK Shade Solutions Ltd
Modus came into the picture within the last 12 months due to taking over from the previous accountants I was using as they had decided it was time for them to retire.
I was a little nervous at first however from the first conversation with Samantha and the team at Modus I was given a huge boost and relief as their professionalism and methods of business is phenomenal.
The advice and guidance already given to me by Modus has been amazing and one I truly appreciate and will continue to learn from so in my opinion I owe Modus a massive thank you for the work they do.
I would highly recommend Modus to any company as both the work and professional service they deliver is first class.
Ian Morris
Managing Director
UK Shade Solutions Ltd
Steven Bartholomew
10:34 27 Jun 22
Great friendly team, very professional always on hand to answer any queries we may have and happy to run any additional reports we require.
Betty Au
16:21 16 May 22
James Hackney is a very detailed minded, efficient, responsive and responsible accountant. He took care of tax return and company filing of my company very well. He explained all my enquiries patiently. Modus is a modern and professional company which provides helpful and valuable advice.
Peter Denton
15:50 13 May 22
I am delighted with the support received from Modus Accountants Ltd. My company has just completed its first end of year accounts, which were managed by Sam Newport and her colleagues. I was very pleased with how they brought everything together with little input from me, allowing me to focus on the day to day needs of my business.
Samantha Mason
10:18 28 Mar 22
Cannot thank Modus enough for all their help and encouragement with my boutique business- My Pilates Flow ! I entered their annual 'Modus Ignite Entrepreneur Competition' in 2021. As a finalist they gave me a complimentary coaching/mentoring session which was incredible! I came away from the meeting buzzing with a whole list of leads to follow up on- ranging from refined branding, how to expand the business and a deep dive into target audience and marketing. I'm working my way through the list and continuing to get great results! This young, forward thinking Company know what they are talking about and I feel privileged to have been given their time. Highly recommend!
Louise Trillwood
11:11 08 Mar 22
The team are just so helpful, really quick to respond and pay close attention to detail. They're able to guide you through even the most granular of queries. It was a breath of fresh air to have our annual tax explained in such simple terms. Couldn't recommend them more highly for personal tax work.
Business advice column
For updates on self-assessment support and news effecting your business.
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