Accounts & Tax Services

Accounts & Tax

The compliance work that should never wake you up at 3am.

Statutory accounts. Corporation tax. Self-assessment. VAT. Capital gains. We handle every line of UK personal and company tax compliance, accurately, on time, with no surprise extras at the bottom of the bill.

Filed on timeEvery year, every client
Fixed feesAgreed up front
Cloud-basedXero, QB, FreeAgent
Senior reviewOn every return

One team, every UK tax

Most accountants are good at one or two things and outsource the rest. We’re a chartered-led team that does the lot in-house: company year-ends, corporation tax, self-assessment, partnership tax, CGT, VAT, IHT planning, and HMRC investigations.

That means consistent advice, joined-up planning, and a single point of contact who actually knows your business, not a ticket bouncing around three different teams.

In your fixed fee

What’s covered

  • Statutory year-end accounts (FRS 102 / FRS 105)
  • Corporation tax (CT600) returns
  • Self-assessment (SA100) for individuals
  • Partnership tax (SA800)
  • Capital Gains Tax computations
  • VAT registration, returns and de-registration
  • Construction Industry Scheme (CIS) returns
  • Inheritance Tax planning
  • Tax-efficient remuneration planning
  • HMRC investigations and disclosures
Why Mercian

Why clients stay

A genuinely modern approach

Cloud accounting, MTD-ready workflows and secure document portals — no shoeboxes of receipts, no surprise emails in March.

Fixed fees, no clock-watching

A clear monthly price agreed up front. Call us as often as you need without worrying about a meter running.

Senior advice, not call-centre answers

Every client has a named accountant who knows your business — not a ticket queue.

FAQ

Common questions

How much will it cost?
A fixed monthly fee agreed up front, based on your structure and complexity. From 45 pounds/mo for a sole trader through to bespoke for groups. Free quote on the call.
How quickly can you file my return?
Most self-assessments turned around within 2 weeks of receiving full records. Limited company accounts within 4-6 weeks of year-end if your bookkeeping is up to date.
I’m behind on filing. Can you help?
Yes — late filings, voluntary disclosures, and HMRC catch-ups are part of what we do every week. The earlier you call, the lower the penalties.
What software do you work with?
Xero (we can pick up from Sage or spreadsheets if you are switching). We will recommend the right one for your business if you are starting fresh.
Do you do tax planning, or just compliance?
Both. Tax planning is included in the fixed fee, we would rather flag a saving in October than ask you to call your bank in January.

Ready to talk to a real accountant?

Book a free 30-minute call. We’ll tell you straight whether we can help, what it would cost, and what to do next. No sales pitch, no obligation.