Wales · Wales
Accountants in Castellior
IGI Accounting serves businesses and individuals in Castellior entirely online, with every fee published and fixed before work starts. Whether you are a sole trader, a landlord, a limited company director or a contractor in Castellior, the service is the same as for clients anywhere in Wales: records by WhatsApp or email, drafts back for approval with the figures explained, and electronic filing with HMRC and Companies House once you have signed off.
Next deadlines
- VAT return and payment for the quarter that ended last month
- VAT return and payment for the quarter that ended last month
- VAT return and payment for the quarter that ended last month
- Confirmation statement due within 14 days of your review date, at least once every 12 months
Services
What we do for Castellior and what it costs
The eight core services below each have a page for Castellior; specialist and advisory services are delivered nationally and are listed further down. Every fee is fixed and confirmed in writing before work starts.
Why IGI
Working with Castellior businesses
An online firm suits Castellior because the things that matter in accounting, accuracy, deadlines, clear explanations and a known price, do not depend on geography. What does depend on geography is overhead, and by not carrying it we charge Castellior clients the published fee and nothing more, with every submission approved by you before it goes.
No appointments, no travel across Wales, no parking. Everything for self assessment tax returns in Castellior happens online, with a real person on the other end during UK working hours.
You get one contact for self assessment tax returns, not a queue. Castellior clients message the same person throughout and get an answer in working hours, usually within a few hours.
The price for self assessment tax returns is published on this page and is what a client in Castellior pays. We confirm it in writing first, and the invoice matches the quote.
Local facts
About Castellior
Castellior sits in Wales. Welsh taxpayers pay Welsh rates of income tax, set by the Senedd and currently matching the English bands, collected under a C-prefixed tax code. National Insurance, VAT and Corporation Tax are UK-wide. Property purchases in Wales pay Land Transaction Tax to the Welsh Revenue Authority rather than Stamp Duty, with its own bands and rates.
| Place | Distance | Direction |
|---|---|---|
| Llandegfan | 1 mi | E |
| Cadnant | 1 mi | SE |
| Menai Bridge | 1 mi | SE |
| Pen-y-garnedd | 1 mi | N |
| Porthaethwy | 2 mi | SE |
| Hen Bentref Llandegfan | 2 mi | E |
| Llansadwrn, Isle of Anglesey | 2 mi | NE |
| Bryn-minceg | 2 mi | E |
National services
Also available to Castellior clients
These services do not vary by location and are delivered the same way for Castellior as for the rest of the UK.
- Limited by Guarantee Formation from £49
- Dormant Company Formation from £29
- Non-Resident UK Company Formation from £149
- Registered Office Address from £69/yr
- Confirmation Statement Filing £33
- Company Name Change £49
- Director Appointments & Resignations £29
- PSC Register Changes £39
- SIC Code Change £39
- Registered Office Address Change £29
- VAT Registration £49
- PAYE Employer Registration £49
- UTR Registration £29
- CIS Registration £49
- Dormant Company Accounts £49
- Make a Company Dormant £44
- Company Strike-Off & Dissolution £59
- CIS Tax Returns from £30/mo
- R&D Tax Credits from £999
- Crypto Tax from £199
- Capital Gains Tax from £149
- Landlord & Property Tax from £149
- Contractor Accountants from £75/mo
- Startup Accountants from £59/mo
- E-commerce Accountants from £79/mo
- Freelancer Accountants from £45/mo
- Small Business Accountants from £65/mo
- Locum Accountants from £69/mo
- Management Accounts from £99/mo
- Tax Planning from £249
- Business Advisory from £149
- Cash-Flow Forecasting from £199
- HMRC Investigation Support from £299
- Making Tax Digital from £99
- Accounting Software Support from £99
Worth knowing
Rules that affect most businesses here
Confirmation statements and identity verification
Every company must file a confirmation statement at least once a year, within fourteen days of its review date, with a £50 Companies House fee. Since November 2025 directors and people with significant control must also verify their identity with Companies House, and the confirmation statement is where existing officers confirm they have done so during the transition year.
CIS deductions
Under the Construction Industry Scheme, contractors deduct 20% from a registered subcontractor's labour invoices, or 30% if unregistered, and pay it to HMRC. The subcontractor reclaims the deductions against their actual tax through Self Assessment, usually producing a refund because deductions are on turnover while tax is on profit. Contractors file a monthly return by the 19th.
The Self Assessment calendar
The tax year runs from 6 April to 5 April. Anyone new to Self Assessment must register by 5 October after the end of the tax year in which their untaxed income began. The online return and the balancing payment are due by 31 January, with a second payment on account on 31 July where they apply. Paper returns have an earlier deadline of 31 October and are rarely sensible.
Payments on account
A common surprise in Self Assessment is the January payment that is far larger than expected. That is the balancing payment for the year just ended plus the first payment on account for the year ahead, which HMRC sets at half of the bill just calculated. We put the figure in your hands months ahead and tell you how to adjust it legitimately when circumstances change.
Late filing penalties
Penalties are the clearest reason to work to deadlines. A Self Assessment return one day late costs £100 regardless of whether any tax is due; three months late adds £10 a day. Late company accounts start at £150 and reach £1,500, and double if the previous year was also late. None of this is negotiable afterwards except through a narrow reasonable-excuse appeal.
Questions
Questions from Castellior
How quickly do you respond?
In UK working hours, usually within a few hours and always the same working day. Each Castellior client has a named contact who knows the file. Outside working hours, WhatsApp and email messages are picked up first thing the next morning. In January and at other peak times we tell you your turnaround when you book rather than leaving you guessing.
Are your fees inclusive of everything?
Our fee covers the work described for the package. Companies House fees, such as £100 to incorporate or £50 for a confirmation statement, are charged separately and passed on at cost. Software subscriptions are in your own name. There is nothing else: no hourly extras, no charge for questions, and no additional year-end invoice for Castellior clients on monthly packages.
What if my Castellior business is a partnership or an LLP?
Both are covered. Partnerships need a partnership return and a Self Assessment for each partner; LLPs file accounts with Companies House under company-style rules as well. We quote a fixed fee for the set based on the number of partners or members, and the process is the same as for any other client in Castellior: records in, draft out, approve, filed.
Do you work with businesses in Wales that are not in Castellior itself?
Yes. Every place in Wales has its own page on this site and the same fees apply throughout. The nearest-places list on this page links to them. Wherever in Wales your business is based, the service is identical because none of it depends on where you are.
Which deadlines matter most for self assessment tax returns?
The next four dates that apply to self assessment tax returns are shown at the top of this page, calculated from today. For Castellior 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.
How do I get started from Castellior?
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 self assessment tax returns. Once you confirm, we tell you exactly which records to send and the work begins. Most Castellior clients are set up within a day.
One message from Castellior, one fixed price
Tell us what you need. You get one fixed fee in writing, and nothing is filed until you approve it.