Accounting

Self Assessment Tax Returns · Wales

Self Assessment tax returns in Ciliau Aeron

If HMRC has asked you for a tax return, the quickest way to get it done from Ciliau Aeron is to hand it over. You upload what you have, we tell you what is missing, and the finished SA100 comes back for approval with the tax owed explained line by line. One fixed fee for Ciliau Aeron residents, agreed in writing, no hourly rate.

from £129 · fixed, one-off

Next deadlines

  • Online Self Assessment filing deadline and balancing payment due
  • Second payment on account due
  • Register for Self Assessment if you started self-employment or new untaxed income in the last tax year
  • Paper Self Assessment return deadline

Who this is for

Self Assessment Tax Returns for Ciliau Aeron

Anyone in Ciliau Aeron who has been told to file a return: the self-employed, landlords with one or several properties, company directors taking dividends, people earning over £100,000 or repaying Child Benefit through the High Income charge, and those with capital gains, foreign income or untaxed savings interest to report.

What is included

Everything inside the fixed fee

  • SA100 and every supplementary page you need (self-employment, UK property, dividends, capital gains, foreign income)
  • A reconciliation against your HMRC personal tax account so nothing is missed or double counted
  • Payments on account calculated and a one-page payment schedule sent to you
  • Claims for allowable expenses, pension relief, Gift Aid and the trading allowance checked before filing
  • Reminders at 60, 30 and 7 days before the 31 January deadline
  • HMRC correspondence about the return we filed handled at no extra charge

How it works

Self Assessment Tax Returns from Ciliau Aeron, 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 Ciliau Aeron

No hourly rate and no surprise invoice. Ciliau Aeron clients know the fee for self assessment tax returns before they send a single document, and it stays fixed.

Deadline-first: the dates that matter for self assessment tax returns are shown at the top of this page, diarised for every Ciliau Aeron client and chased before they arrive.

Online only, UK based. There is no office in Ciliau Aeron 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 self assessment tax returns, not a queue. Ciliau Aeron clients message the same person throughout and get an answer in working hours, usually within a few hours.

We explain self assessment tax returns in the words Ciliau Aeron business owners use, not in accountant's shorthand, and we show our working so you can check it.

You stay in control of self assessment tax returns: drafts go to Ciliau Aeron clients first, with the figures explained, and nothing leaves us until you say so.

Local facts

About Ciliau Aeron

Ciliau Aeron is in Wales, 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 self assessment tax returns
PlaceDistanceDirection
Foelallt0.4 miS
Newbridge, Ceredigion0.5 miNE
Tyglyn0.7 miN
Green Grove1 miSE
Llanayron2 miNW
Cilcennin2 miNE
Neuadd-Lwyd2 miW
Dihewyd2 miSW

Worth knowing

Rules that come up in this work

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.

The Self Assessment calendar

Self Assessment runs on a fixed annual cycle. Registration by 5 October following the tax year, online filing and payment by 31 January, and a second instalment on 31 July for those making payments on account. The penalties for lateness are automatic and escalate monthly, which is why we file early and chase approvals well before the window closes.

Making Tax Digital for Income Tax

The biggest change to Self Assessment in a generation is Making Tax Digital for Income Tax, now live for higher-earning sole traders and landlords and arriving for the rest in stages. Quarterly updates are due by 7 August, 7 November, 7 February and 7 May, built from digital records. The practical consequence is that spreadsheet-and-shoebox bookkeeping is ending for anyone above the threshold.

Late filing penalties

HMRC's penalties for a late Self Assessment return are automatic: £100 the day after 31 January, £10 a day from three months late up to £900, then the greater of £300 or 5% of the tax at six and twelve months. Interest and separate late-payment penalties apply to the tax itself. Companies House charges £150 to £1,500 for late accounts, doubling for a second consecutive year.

The 60-day property CGT return

The 60-day Capital Gains Tax return on residential property is the deadline landlords most often miss, because it falls outside the Self Assessment cycle and runs from completion, not exchange. Private residence relief for periods you lived in the property, plus the final nine months, reduces the gain. Penalties for a late return mirror Self Assessment, starting at £100.

Corporation Tax rates and marginal relief

Corporation Tax is not a flat rate. Profits to £50,000 pay 19%, profits above £250,000 pay 25%, and the band between is taxed at an effective marginal rate of 26.5% through the marginal relief mechanism. Associated companies share the thresholds, which catches directors who own more than one company and is the most common cause of underpaid tax in owner-managed groups.

Crypto records and reporting

Crypto tax splits into capital gains on disposals and income on rewards, with different rates and different reporting. The £3,000 annual exempt amount and the 18% and 24% rates apply to gains; staking, mining and airdrop income is taxed at marginal income tax rates. HMRC's nudge letters to holders have increased sharply, and a voluntary disclosure before one arrives is treated far more leniently.

Questions

Self Assessment Tax Returns questions from Ciliau Aeron

Will Making Tax Digital change my return?

From April 2026 sole traders and landlords with qualifying income over £50,000 send quarterly updates to HMRC through software, with the £30,000 threshold following in April 2027. The year-end return becomes a final declaration. We set this up through our bookkeeping service when it applies to you.

What happens after you file?

You receive HMRC's submission receipt, a PDF of the return, the tax computation and a payment schedule with HMRC's bank details and your payment reference. We diarise next year's deadlines for you and send reminders before each one.

Which expenses can I claim as a sole trader?

Costs that are wholly and exclusively for the business: materials, business travel other than ordinary commuting, a proportion of home running costs, software, insurance, professional fees and bank charges. If your expenses are under £1,000 the trading allowance may be better, and we check both.

How do payments on account work?

If your bill is over £1,000 and less than 80% of your tax is collected at source, HMRC asks for two advance payments towards next year, due 31 January and 31 July, each half of this year's bill. We calculate both and show you how to reduce them if your income is falling.

Do I pay before or after filing?

The fee is invoiced when you approve the draft, before we file. Nothing is submitted to HMRC until it is paid and you have confirmed every figure, and you receive HMRC's submission receipt within minutes of filing.

Can you deal with HMRC on my behalf?

Once you authorise us as your agent we can speak to HMRC about your return, see your account and respond to letters about the return we filed. The authorisation is free, done through your Government Gateway or a code HMRC posts to you, and takes a few days to activate.

How do I get started from Ciliau Aeron?

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 Ciliau Aeron clients are set up within a day.

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 Ciliau Aeron 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.

Get a fixed quote for Ciliau Aeron today

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