Accounting

Corporation Tax · Wales

Corporation tax returns in Merthyr Tydfil

A company trading in Merthyr Tydfil pays Corporation Tax nine months and one day after its year end and files the CT600 three months after that. We handle both from your accounts, whether we prepared them or another firm did: standalone CT600 at £199, with a capital allowances review at £299, overdue rescue at £279. Fixed, agreed in writing.

from £199 · fixed, per return

Next deadlines

  • Company tax return (CT600) due 12 months after your year end (a 31 December year end files by 31 December)
  • R&D claim deadline: 2 years after the end of the accounting period (and the pre-notification window of 6 months after the period for first-time claimants)
  • Companies House accounts due 9 months after your year end (a 31 December year end files by 30 September)
  • Corporation Tax payment, 9 months and 1 day after your year end (a 31 December year end pays by 1 October)

Who this is for

Corporation Tax for Merthyr Tydfil

Limited companies in Merthyr Tydfil of every size below the large-company regime: companies whose accounts are prepared by another firm or in-house and need the tax return filed, companies with capital expenditure to claim, companies that have made a loss and want it used well, groups of associated companies, and companies whose CT600 is already overdue.

What is included

Everything inside the fixed fee

  • Corporation Tax computation reconciling accounting profit to taxable profit, with every adjustment explained
  • Capital allowances claimed in full: annual investment allowance, full expensing, writing-down allowances and the special rate pool
  • Loss relief planned and claimed: carry back, carry forward and group relief where it applies
  • Marginal relief and associated-company rules applied correctly between the 19% and 25% rates
  • CT600 with supplementary pages, iXBRL-tagged accounts and computation, filed electronically with HMRC
  • Payment note with amount, due date and HMRC reference, and reminders before the payment and filing dates

How it works

Corporation Tax from Merthyr Tydfil, step by step

  1. Scope the job

    We find out what you need filed, when it is due and what state the records are in, and tell you which fixed-fee package applies.

  2. Agree the price

    The fee is confirmed in writing. There is no hourly billing and nothing added for questions during the work.

  3. Hand over the records

    Photographs, PDFs, software access or a spreadsheet, sent however suits you. We confirm what we have and what is missing within two working days.

  4. Approve, then we submit

    You review the draft with our explanation, sign off, and we file. Receipts, copies and the next deadlines come back to you immediately.

Why IGI

The IGI way of working, in Merthyr Tydfil

No hourly rate and no surprise invoice. Merthyr Tydfil clients know the fee for corporation tax before they send a single document, and it stays fixed.

Deadline-first: the dates that matter for corporation tax are shown at the top of this page, diarised for every Merthyr Tydfil client and chased before they arrive.

Online only, UK based. There is no office in Merthyr Tydfil to pay for, which is why the fee is the same here as anywhere in Wales; the work is done by people in the UK who answer the same day.

You get one contact for corporation tax, not a queue. Merthyr Tydfil clients message the same person throughout and get an answer in working hours, usually within a few hours.

Plain English, with the numbers. Every draft for Merthyr Tydfil comes with a short explanation of what the figures mean and what, if anything, you should do about them.

Approval before filing is a rule, not a courtesy. For corporation tax in Merthyr Tydfil, every submission to HMRC or Companies House follows your written go-ahead.

Local facts

About Merthyr Tydfil

Merthyr Tydfil is in Wales, in the CF47 postcode district, Wales. Businesses in Wales file with the same HMRC and Companies House as England, and for now the Welsh rates of income tax equal the English ones, though the Senedd can vary them. The practical differences are Land Transaction Tax on property and Welsh-specific business support schemes, and company names and documents may be in Welsh.

Nearby places we also serve for corporation tax
PlaceDistanceDirection
Glebeland0.1 miNW
Cae-draw0.2 miS
Newfoundland0.2 miNW
Ynys-fach0.2 miW
Ynysfach0.2 miW
Abermorlais0.3 miNW
Morgan Town0.3 miN
Thomas Town, Wales0.3 miE

Worth knowing

Rules that come up in this work

CIS deductions

The Construction Industry Scheme affects both sides of a construction payment. Contractors must verify subcontractors, deduct the right amount, issue statements and file monthly, with penalties from £100 for each late return. Subcontractors suffer deductions on turnover and recover the excess at the year end. Limited company subcontractors offset deductions against PAYE monthly instead.

Confirmation statements and identity verification

Companies House has tightened its requirements under the Economic Crime and Corporate Transparency Act: every company needs a registered email address and an appropriate registered office, every statement includes a lawful-purpose declaration, and every director and PSC must verify their identity. The confirmation statement, due annually with a £50 fee, is where most of this is confirmed.

Corporation Tax rates and marginal relief

Companies pay Corporation Tax at 19% on profits up to £50,000 and 25% on profits over £250,000. Between those figures marginal relief applies, producing an effective rate that rises gradually and a marginal rate of 26.5% on each pound in the band. The thresholds are divided by the number of associated companies, so a director with two companies has thresholds of £25,000 and £125,000 for each.

The VAT registration threshold

VAT registration is compulsory once taxable turnover in any rolling twelve-month period exceeds £90,000, or when you expect to exceed that in the next thirty days alone. The test is rolling, not by tax year, and includes zero-rated sales. Businesses regularly cross it without noticing, and late registration means accounting for VAT on sales where it was never charged to customers.

Director's loan accounts

The most common tax problem in owner-managed companies is an overdrawn director's loan account: drawings taken during the year that were never declared as dividends or salary. The company faces a 35.75% charge on the balance outstanding nine months after the year end, and the director may have a benefit in kind. We review the account before every year end to clear it properly.

Salary versus dividends

Paying yourself from a company involves two routes with different tax treatment. Salary through payroll is a company expense and builds a National Insurance record; dividends come from post-tax profit at lower personal rates. Undocumented drawings that are neither become director's loans, with a 35.75% section 455 charge if not repaid within nine months of the year end.

Payments on account

Payments on account catch out most people in their second year of self-employment. HMRC assumes next year's tax will match this year's and collects half in January and half in July, in advance, on top of the balancing payment. If profits are dropping you can apply to reduce them, but reducing them too far attracts interest. We calculate the right figure rather than guessing.

Questions

Corporation Tax questions from Merthyr Tydfil

Does R&D affect my Corporation Tax return?

Yes. Research and development relief is claimed on the CT600 and reduces the tax or generates a credit. Since the merged scheme, first-time claimants must notify HMRC within six months of the period end. Our R&D service prepares the technical report and the computation; the claim then goes on the return we file.

Can you deal with HMRC if they open an enquiry into the return?

Yes. As your authorised agent we receive and respond to HMRC correspondence. Routine queries about a return we filed are handled at no extra charge. A formal enquiry is handled through our HMRC investigation service at fixed fees per stage, so you know the cost before deciding how to proceed.

What are capital allowances and what can I claim?

Capital allowances are the tax equivalent of depreciation. The annual investment allowance gives 100% relief on up to £1 million of qualifying plant and machinery a year; full expensing gives 100% on new main-rate assets without limit; cars and integral features go into pools at 18% or 6%. The £299 package reviews every asset purchase in the year.

When is Corporation Tax paid and the return filed?

Tax is due nine months and one day after the end of the accounting period; the CT600 is due twelve months after it. Companies with profits over £1.5 million pay by instalments instead. Interest runs on late payment from the due date, and a late return attracts a £100 penalty rising to 10% of the tax at twelve months.

What are the Corporation Tax rates for 2026/27?

Profits up to £50,000 are taxed at the 19% small profits rate. Profits above £250,000 pay the 25% main rate. Between the two, marginal relief produces an effective rate rising from 19% towards 25%, with a marginal rate of 26.5% on each pound in the band. The thresholds are divided by the number of associated companies plus one.

Is the CT600 included when you prepare the accounts?

Yes. Our limited company accounts packages at £299 and £449 include the computation, the CT600 and filing with HMRC. The standalone fees on this page are for companies whose accounts are prepared elsewhere or where the return needs separate work such as a capital allowances review.

How do I get started from Merthyr Tydfil?

Message us on WhatsApp or email with a sentence about your business and what you need. We reply in working hours with any questions and a fixed fee for corporation tax. Once you confirm, we tell you exactly which records to send and the work begins. Most Merthyr Tydfil clients are set up within a day.

Which deadlines matter most for corporation tax?

The next four dates that apply to corporation tax are shown at the top of this page, calculated from today. For Merthyr Tydfil clients we diarise every one of them from the day you join and send reminders before each, so the work is done in good time rather than in the last week before a penalty.

Start the conversation from Merthyr Tydfil

Tell us what you need. You get one fixed fee in writing, and nothing is filed until you approve it.

WhatsApp for a fixed quote