As deadlines approach and last-minute returns start piling up, your team can quickly become stretched thin trying to juggle it all. That’s where QX steps in.
Our bespoke, market-leading solutions help you build an extended team of UK-ready tax experts, often within just a week. From simple to complex returns, we handle it all using the latest tax software and automation tools.
Join 350+ accounting firms that trust QX for tailored Self Assessment tax return outsourcing and make tax season stress-free and efficient.
Capacity gaps are costing firms more than just revenue. Accountants are turning down work, leading to missed deadlines and lower service quality.
Capacity issues stall growth. Staff turnover drains productivity, hurts service quality, and keeps you stuck in a hiring cycle. How long can your firm keep up?
We simplify each step, ensuring seamless integration from initial scope to final delivery. Our Self Assessment tax return outsourcing process is designed to enhance your efficiency and reduce your workload.
Our year-end accounts outsourcing services are designed for:
UK accounting and bookkeeping firms looking to boost capacity and cut turnaround times.
SMEs that need accurate accounts preparation without building a large in-house team.
CFOs and finance managers who want reliable compliance support and peace of mind.

Imagine Timely, Accurate, Secure, and Effortless Tax Preparation. Embrace Tech-Driven Efficiency and Streamlined Excellence!
Skilled accountants with extensive knowledge of UK tax laws, perfect for managing both seasonal surges and long-term needs.
Vast pool of trained and highly experienced tax preparers with excellent technical and communication skills.
Helping accounting firms conquer tax season and boost profits through streamlined, efficient tax processing.
Error-free tax returns with a four-eyed review system, integrating process excellence and governance.
100% secure tax preparation support with GDPR compliance, ISO 27001, and CyberEssentials Plus certification.
Proven expertise in all the latest tax preparation software, including Iris, Xero, TaxCalc, Digita, CCH, and more.
Significant savings on operational costs, freeing up resources for investment in growth and strategic initiatives.
Trusted by leading accountancy firms in the UK for precise, efficient, and reliable tax return support.
Backed by two decades of experience and a 96% CSAT score, we’re the go-to choice for 350+ accounting firms for bespoke Self Assessment tax return outsourcing.





Discover what our clients have to say about our tax prep outsourcing service
Experience unparalleled efficiency, accuracy, and security tailored to elevate your firm’s tax operations








Your software, our expertise – the QX team of expert tax preparers is trained to use the tools you trust, ensuring a seamless and efficient process.






Have questions? Find answers to all your doubts about outsourcing and how QX’s strategic expertise can help transform your practice.
Outsourcing tax preparation takes the stress off your plate by handling time-consuming compliance, data entry, and filing tasks. It helps you stay accurate, meet deadlines effortlessly, and focus more on running and growing your business.
There are two ways QXAS manages tax preparation for your firm:
Outsourcing tax preparation to QXAS can boost your tax season profitability by saving time, reducing costs, and bringing in an influx of clients. It lets you tap into expert skills and stay focused on your core work. Plus, it leads to more accurate tax filings and compliance, resulting in happy clients.
QXAS is a market leader in the outsourcing space, helping accounting firms scale during the tax season through tailored support. Our team comprises highly experienced and trained tax professionals specialising in UK tax legislation. We are a 100% GDPR and ISO compliant company, providing customised solutions to suit your requirements.
At QXAS, we provide customised pricing and engagement models tailored to clients’ requirements. The cost of outsourcing tax for your firm depends on the complexity and volume of your tax returns. To request a custom quote, fill in the form at the bottom of this page or call us directly at +44 208 146 0808.
By outsourcing your tax preparation to QX, you can save up to 50% compared to in-house costs, without compromising on accuracy, quality, or turnaround time.
Yes, we offer volume-based discounts and specialised Early Bird pricing for outsourced tax preparation services. The pricing depends on the complexity of your tax returns.
Yes, we offer a NO-OBLIGATION TRIAL on our tax return outsourcing services for up to 10 hours or 2 returns. You can assess our services risk-free before you decide to outsource with us.
Tax outsourcing services ensure your business stays compliant by keeping up with the latest UK tax laws, deadlines, and HMRC requirements. Expert teams review every detail to minimise errors and help you avoid costly penalties.
QXAS is a 100% GDPR-compliant outsourcing provider. We are also ISO 27701, ISO 27001 and Cyber Essentials Plus certified with stringent security standards. With us, your clients’ data will be safe and protected at all times.
More UK businesses are turning to tax outsourcing to cut costs, access expert knowledge, and stay compliant with ever-changing HMRC regulations. It offers flexibility during busy seasons and frees up time to focus on core business growth.
When you outsource tax services to QXAS, you get access to the QX Insight dashboard, wherein you can follow the progress of your tasks regularly. Besides, we also provide unlimited chat and email support and regular governance calls to help resolve any issues.
Looking for more than year-end accounts? QXAS also offers:
Explore outsourcing solutions, request a free trial or discuss your practice’s needs with our expert consultants.