Self Assessment tax return accountant

Outsourcing annual self-assessment tax returns is a great way to maximise the resource in your own accountancy practice.

We all know that some tax returns are relatively straightforward while those for high-net-worth individuals typically require a more strategic approach.

By letting our Self Assessment tax return accountant team handle the routine returns, making the calculations and completing the paperwork, you’ll free up your own team to give strategic advice to those high value clients.

You might also choose to outsource self-assessment tax returns during those challenging peaks towards the end and beginning of each year, reducing the stress of the January crush and providing your clients with a seamless service.

We’ll work with whichever systems you currently have in place, from Xero to FreeAgent and every stop between, so that you and your clients can continue to enjoy easy recording and real-time information.

With Diamond Outsourcing on board it has freed up my time. I no longer work evenings or weekends, I have more time with the family, I have left my 9 to 5 job. I concentrate on the areas of accountancy I love whilst they do the rest. We have an aligned vision to grow my practice and through help and mentoring we are growing together day by day!

— Janielle, Kent

Four easy steps

Our process is straightforward and transparent

step one


Our UK management team will work with you to set up goals and processes – who is responsible for what and how it will work in practice.

step two


We'll brief the overseas audit team and get you connected. You'll manage them directly but can call on us whenever you need to.

step three


The audit processing team will work through the tasks you set them, from reviewing accounts to running audit tests.

step four

Results review

They'll present outputs on the agreed schedule and we'll check in with you to confirm you're happy with the results.

How do you prefer to work?

Talk to us about your processes and challenges so that we can design an outsourcing service for you. Discover our...