Who We Are, and Why We’re Different

PSS Tax is the R&D tax relief practice of Perfect Support Services Limited, registered in England and Wales. Our consultants combine sector technical knowledge with corporation tax expertise, assessing every project against the DSIT Guidelines before we agree to act — because a claim that cannot be defended is not worth filing.

PSS Tax is a UK R&D tax relief consultancy trading as Perfect Support Services Limited. Our technical consultants and qualified accountants assess eligibility before engagement, decline non-qualifying projects, and build audit-ready claims evidenced against HMRC’s DSIT Guidelines from offices in London, Manchester and Hampshire.

A PSS Tax R&D consultant in the Manchester office
A PSS Tax consultant being interviewed at the Manchester office
PSS Tax colleagues listening in a team meeting
A PSS Tax adviser at their desk in the Manchester office
Two PSS Tax colleagues comparing notes between calls

Our Pillars

The Foundation of
Everything We Do

Technical Excellence & Compliance

Specialists, not salespeople. Every claim is tested against CTA 2009 Part 13 and the DSIT Guidelines, with qualifying expenditure reconciled to statutory accounts and audit-defence documentation retained for the enquiry window.

Client-Centric Service

Every engagement begins with a technical conversation, not a sales call. You work with named consultants who explain each stage — eligibility, expenditure, narrative, submission — before it happens.

Partnership & Long-Term Growth

We work across multiple claim cycles, track advance-notification deadlines on your behalf, and set up record-keeping so future projects are evidenced as they happen rather than reconstructed afterwards.

Integrity & Transparency

If a project does not qualify, we say so and charge nothing. Fees are agreed in writing before work begins, and we do not inflate qualifying expenditure to increase a claim or our fee.

Innovation & Efficiency

We minimise the demand on your team: structured interviews rather than open-ended questionnaires, data pulled from existing payroll and project records, and a single approval point before submission.

People & Culture

Our consultants are employed, trained and retained in-house, so the person who interviews your technical team is the person who writes and defends your claim.