Self-Assessment Tax Return Outsourcing Support For Business Accountants
Make your busy tax season “our” busy tax season. We process thousands of tax returns for our clients annually using a range of software and our up-to-date knowledge of tax legislation. Give our service a try today!
Diminish the pressure of January and furnish your clients with consistent support
Tax season! Every accountant dreads it. It’s that time of the year when most accountants are on their toes, burning the midnight oil to create and file tax returns for their clients. Although an annual task, Self-Assessment tax return preparation is time-consuming and labour-intensive. That’s why tax return outsourcing makes sense. Our tax team, for instance, can help with all aspects of your clients’ tax returns, including handling multiple streams of income and business expenses, managing assets, highlighting missing information and filing and submitting your tax return. It’s always better to plan for Self-Assessment to avoid hefty late penalties. Outsourcing allows you to always be a step ahead.
Scope of our Self-Assessment tax return outsourcing service
- Property schedules
- Calculation of payment on account
- Completion of supplementary pages
- Review and filing online with HMRC
- Forecast of individual and partnership tax
- Self Assessment for individuals and partnerships
Contact us to find out how we help UK accountants with AP/AR.
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Client stories

As a general practitioner for over 30 years I have experienced all the highs and lows of staff shortages, poor quality working papers, missed deadlines and the day-to-day pressure of work. Since being with Affinity I have not missed a single deadline, I have found the quality of their work to be excellent, and l can relax more, safe in the knowledge that they are there for me, taking care of both my clients and my Practice. I cannot recommend Affinity highly enough.
McKenzie Philips Tax Accountants

As a general practitioner for over 30 years I have experienced all the highs and lows of staff shortages, poor quality working papers, missed deadlines and the day-to-day pressure of work. Since being with Affinity I have not missed a single deadline, I have found the quality of their work to be excellent, and l can relax more, safe in the knowledge that they are there for me, taking care of both my clients and my Practice. I cannot recommend Affinity highly enough.
McKenzie Philips Tax Accountants

As a general practitioner for over 30 years I have experienced all the highs and lows of staff shortages, poor quality working papers, missed deadlines and the day-to-day pressure of work. Since being with Affinity I have not missed a single deadline, I have found the quality of their work to be excellent, and l can relax more, safe in the knowledge that they are there for me, taking care of both my clients and my Practice. I cannot recommend Affinity highly enough.
McKenzie Philips Tax Accountants
Software capabilities






We are different from ordinary outsourced accounting firms. We know our job well.

Pay As You Go!

Opt for a free trial
We see outsourcing as a solution for business growth and that helps accountancy practices achieve their potential. That’s why we offer to run a free trial job, so you can see how much your practice can benefit from outsourcing. Once you are confident, we work with you to create a bespoke package to suit the needs of your business. How simple is that, right?

Get transparent, simple pricing
We don’t charge by the hour, nor would you have to pay a monthly fee when no work is available. Either all the work we produce for you is completed for a guaranteed fixed fee. This is calculated as a set % of the fee you charge your client, which means you always know how much profit you’ll make on the job! Or if you have sufficient work, we provide a full time employee.

Add value to your practice
Outsourcing equals value addition, and we want all accountancy practices – small, medium, and large – to tap into their full potential without hassle. That’s why our team of certified and experienced accountants ensure that their work is top quality and delivers 100% client satisfaction. That’s a guarantee from our team!

Outsource your work in a structured way
Affinity Outsourcing is owned and managed by qualified UK accountants in practice. All your work is managed by an appointed client manager and team in India. Our advanced systems enable you to track the progress of every job and someone is always available during UK hours. Of course, the UK team is available if you have any doubts.

Use the latest accounting technologies
In this day and age, it always helps to be a tech-savvy accountancy practice. If you don’t have that competitive edge yet, fret not. Let us share our knowledge and expertise of the latest accounting software, such as Xero, QuickBooks, and Dext, and empower your accountancy practice to deliver competent services to your clients.
Frequently Asked Questions (FAQs)
No, it isn't. But managing high volumes of self-assessments can get overwhelming for anyone! Plus, no accountant wants to spend the last and first months of the year chasing clients for paperwork, sorting out tax returns, and filing them when they can better utilise the time to grow their practice or even take a break! If your practice staff is struggling with the Self-Assessment workload, take our help!
Tax savings can only be achieved through healthy and timely tax planning - well done in advance. With Self-Assessment tax return outsourcing, you can leverage experience and expertise, minimise your clients' tax liability, and file their returns on time. You can count on Affinity Outsourcing - for all tax season requirements!
Is your accountancy practice ready to outsource?
Explore how Affinity Outsourcing can help you by requesting a call back from our team.
Explore how Affinity Outsourcing can help you by requesting a call back from our team.
The Affinity Outsourcing Blog
Q4 Tax Planning MTD 2025 : Helping Accountants Prepare for MTD Q4 for accountants is never “quiet.” Between client queries, year-end planning, and juggling HMRCdeadlines, it’s already a plate-spinning act. And now, with Making Tax Digital (MTD) in full swing, the adminload is only getting heavier.But with the right systems (and support) in place, Q4 doesn’t have to feel like a marathon of spreadsheets,late-night reconciliations, and frantic client reminders. MTD in 2025: Why Q4 Matters for Accountants MTD isn’t new, but this year it’s stepped up:• VAT: Almost everyone VAT-registered is already under MTD.• Income Tax Self-Assessment (ITSA): From April 2026, self-employed clients and landlords earning over£50k will need to report digitally.• Corporation Tax: Not mandatory yet, but pilot schemes are underway.That makes Q4 the perfect time for accountants to get ahead, not just for compliance, but to ease theadmin burden in January and beyond. Where the Admin Stress Creeps In Ask any accountant what slows them down, and the list will look like this:• Chasing clients for receipts, invoices, or missing records.• Reconciling multiple spreadsheets or outdated systems.• Double-checking figures before submission because data isn’t centralised.• Training clients who still resist the “digital shift.”Sound familiar? That’s why Q4 is your golden window to tidy processes, shift clients onto digital tools, andlighten the workload before the year-end crunch. 5 Practical Steps for Accountants This Q4 1. Audit Your Client Base Who’s already MTD-ready, and who still needs a nudge? Create a quick client matrix:Compliant , In progress , Not started .This makes it easier to prioritise your time. 2. Standardise Your Software Stack The more platforms you’re juggling (Xero here, spreadsheets there, bespoke systems somewhere else), themore admin it creates. Q4 is a great time to guide clients towards a standard set of MTD-ready tools, whichsaves you headaches later. 3. Get Ahead of Deadlines Yes, ITSA doesn’t go live until 2026. But use this quarter to:• Educate clients about what’s coming.• Encourage trial runs of quarterly reporting.• Set up workflows now so it’s smooth when the rules finally hit. 4. Lean on Outsourced Support If you’re drowning in admin, don’t wait until January to get help. Outsourced bookkeeping, payroll, or data-entry support can free up your team to focus on advisory work and higher-value tasks. 5. Turn Compliance into Client Value Instead of positioning MTD as “yet another HMRC box to tick,” show clients how digital records give themreal-time insights. That way, you’re not just their tax person, you’re their business partner. Our Takeaway for Accountants Q4 doesn’t have to mean late nights and constant chasing. By getting ahead on MTD prep now and cuttingdown the manual admin that clogs up your time, you can start 2026 on the front foot.That’s where we come in: our services are designed to take the admin stress off your plate so you canfocus on what you do best, advising clients and growing your practice.So, while other firms are scrambling in January, you’ll be able to breathe easy knowing you’ve already putthe groundwork in place. Pro tip for accountants:Block out time in October for client MTD check-ins. It’ll save you ten times thestress when January hits.
Top 7 Signs You Need to Outsource Your VAT Return Workload Handling VAT returns can feel like walking a tightrope. One small misstep, and you could face penalties, fines, or unexpected audits. If you’re feeling the pressure, it might be time to consider outsourcing your VAT workload. But how do you know when it’s the right move? Here are the top seven signs that outsourcing your VAT returns could save you time, stress, and potentially money. 1. You’re Constantly Playing Catch-Up If you’re scrambling every quarter to collect invoices, check VAT rates, and reconcile accounts, it’s a sign your VAT workload is unmanageable. Outsourcing VAT returns ensures deadlines are met on time and accurately, saving you from last-minute stress and potential fines. 2.Mistakes Are Becoming Frequent Even minor errors on VAT returns can lead to penalties or audits. If you’re regularly correcting mistakes, it’s a clear signal that outsourcing could be beneficial. Professional VAT teams know how to avoid common errors, keeping your business compliant and your peace of mind intact. 3.You’re Spending Too Much Time on Admin Manual VAT tasks like compiling invoices, reconciling accounts, and checking tax rates can take hours every week. If these tasks are eating into your business growth time, outsourcing VAT returns can free up your schedule for strategic activities. 4.Your Business Is Growing As your business expands, VAT complexity grows. More sales, multiple suppliers, and cross-border transactions make manual VAT management difficult. Outsourcing VAT work scales with your business, ensuring accurate returns regardless of volume or complexity. 5.Staff Are Stretched Thin A busy finance team juggling multiple responsibilities can struggle to manage VAT returns accurately. Outsourcing distributes the workload, reduces stress, and allows your team to focus on higher-value tasks like financial planning or business analysis. 6.You’re Uncertain About VAT Rules VAT legislation is constantly changing. If you’re spending hours trying to stay updated, mistakes are likely. Outsourcing VAT returns to experts ensures your business remains compliant while taking advantage of any tax efficiencies. 7.You Want Predictable Costs Outsourcing VAT services comes with transparent fees, making budgeting easier and reducing the risk of unexpected charges from errors or late filings. Predictable costs help you plan your business finances with confidence. Bottom Line: VAT returns don’t have to be stressful. If you recognise any of these signs, outsourcing your VAT workload could save you time, reduce errors, and ensure compliance, allowing you to focus on growing your business. Ready to streamline your VAT returns? Contact us today to see how outsourcing VAT can simplify your finances.
Seamless Accounting Made Easy: Top Reasons To Outsource This Summer Affinity Outsourcing As summer rolls in and inboxes across the country start filling with “out of office” replies, many business leaders are thinking about switching off, at least for a little while. But while holidays are essential for recharging, your business operations, especially your finances, can’t take a break. Outsourced accounting comes ensures your finance function stays on track, even when you (or your team) are on the beach. Here’s why summer is the perfect time to explore it. 1. Cover for Key Staff on Leave During the summer months, internal finance teams often run lean. Whether it’s your bookkeeper, finance manager, or payroll lead, when key people are away, gaps appear. Outsourcing fills those gaps with expert support. You gain access to a fully resourced finance function that keeps operations smooth, from invoicing to payroll and reporting. No delays. No stress. Just continuity. 2. Stay on Top of Reporting While You Switch Off Even when you’re away, numbers still need to be tracked. Deadlines don’t move just because you’re poolside. Outsourced accounting teams work in the background, ensuring monthly closes, reconciliations, and cash flow reports are delivered on time, so you can check in if you want to, but not because you have to. 3. Use the Quiet Season to Prepare for Growth For many businesses, summer is a natural slow period. That makes it an ideal time to review your finance function and set up more scalable systems. An outsourced accounting partner can: Assess inefficiencies Automate manual processes Prepare your reporting for better decision-making Set you up for a strong Q4 It’s strategic groundwork, laid when you’re not firefighting. 4. Peace of Mind While You Recharge You don’t take a holiday just to keep checking your bank balance or chasing invoices. Outsourcing gives you confidence that professionals are handling the detail, so you can truly step away knowing your business isn’t missing a beat. It’s the kind of mental clarity every business leader deserves. 5. Come Back Refreshed…and Ahead When you return from holiday, imagine coming back to clean books, up-to-date reports, and an inbox not full of urgent finance questions. Outsourced accounting keeps your engine running and positions you to pick up with momentum when you’re back. Ready to Make This the Summer You Streamline? Outsourced accounting frees up your time, reducing risk, and creating a finance function that works whether you’re in the office or on the Amalfi Coast. If you’re ready to experience seamless accounting this summer (and beyond), get in touch and let us take the operational weight off your shoulders.