Corporate Tax Preparation Outsourcing

For busy accountants handling high volumes of clients, processing routine corporation tax returns for limited company clients can be a drain on time. Why not let us handle those for you?

Corporate tax outsourcing as an ongoing part of your business model can free up the time of your core staff to focus on the highest value clients most in need of strategic advice.

Or you might just want help at the busiest times of year as corporate financial years wind to an end.

Either way, our cost-effective solution is the easy way to increase your capacity.

Our team, based overseas but managed from our headquarters in Sittingbourne in Kent, is experienced in processing corporation tax and business tax registrations and preparing limited company, partnership and LLP tax returns.

Working with the information you provide, and using your own accounting software and systems, they’ll provide a seamless, efficient service that reduces the burden and, crucially, will make you look good.

With the extra capacity our business has continued to grow. We spend less time moving figures around and more time ensuring our customers really understand the accounts to make a difference in their business. We’ve been working with Diamond outsourcing for 2 years now and I have continued to recommend them to my peers.

— Sole practitioner, Oxfordshire 

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.