Micromat · compliance, done correctly
We build the software and services that keep small UK companies on the right side of HMRC — Corporation Tax, payroll and HR — checked against HMRC's own rules before anything is ever sent.
Validated — ready to file
Passes every check HMRC runs on submission.
What we do
From the statutory filing that can't be wrong to the everyday admin that quietly keeps you compliant.
We turn your figures into a Company Tax Return (CT600) with fully tagged iXBRL accounts and computations, and file it straight to HMRC. Every return is validated first, so what we send is what they accept.
Run payroll for a small team with RTI submissions to HMRC, clear payslips, and the year-end pieces handled.
Contracts, staff records and the everyday HR admin that keeps a growing company on the right side of the rules.
Custom software, integrations and IT support — built around how your business actually works, not the other way around.
How a filing works
Your figures become a compliant CT600 with tagged iXBRL accounts and computations.
Checked against the schema, HMRC's business rules and the tax calculation — before anything leaves your hands.
Filed over HMRC's secure channel with a verified IRmark, so the integrity of the return can be proven.
HMRC's confirmation comes back and is kept on file as your record of exactly what was submitted.
Why Micromat
A wrong filing means penalties. So correctness comes before everything — speed, features, the lot.
Returns are checked against HMRC's own validation before submission — schema, business rules, IRmark and the tax calculation.
Where a number depends on judgement, we flag it rather than guess. Your filings are not the place to take chances.
Built for owner-managed companies and the accountants who file for them — no enterprise bloat, no jargon.
Who it's for
Directors who want their filings done right — without having to learn tax law to get there.
Practices filing on behalf of clients who want submissions that are validated before they go.
New companies that would rather have compliance handled properly from day one.
Get in touch
A short email is plenty to start. We'll tell you, in plain terms, what we can take off your plate.
support@micromat-technology.uk.eu.org