Self Assessment Tax Returns · South East London
Self Assessment tax returns in Cathedrals
If HMRC has asked you for a tax return, the quickest way to get it done from Cathedrals 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 Cathedrals 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 Cathedrals
Anyone in Cathedrals 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 Cathedrals, step by step
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.
Agree the price
The fee is confirmed in writing. There is no hourly billing and nothing added for questions during the work.
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.
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
Why Cathedrals businesses file with IGI
The price for self assessment tax returns is published on this page and is what a client in Cathedrals pays. We confirm it in writing first, and the invoice matches the quote.
Nothing for Cathedrals is left to the last week. Each deadline relevant to self assessment tax returns is tracked from the day you join, with the next four shown on every page we send you.
No appointments, no travel across South East London, no parking. Everything for self assessment tax returns in Cathedrals happens online, with a real person on the other end during UK working hours.
A named person handles your self assessment tax returns from Cathedrals and knows the file, so you are not re-explaining your business to a different helpdesk each time.
Plain English, with the numbers. Every draft for Cathedrals 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 self assessment tax returns in Cathedrals, every submission to HMRC or Companies House follows your written go-ahead.
Local facts
About Cathedrals
Cathedrals is in South East London, within Southwark, in the SE1 postcode district, England. For businesses in England the tax rules are those set by the UK Parliament: the 20/40/45% income tax bands, Class 4 National Insurance for the self-employed at 6% and 2%, Corporation Tax at 19% to 25%, and Stamp Duty Land Tax on property. Business rates are set locally by the council.
| Place | Distance | Direction |
|---|---|---|
| Southwark | 0.3 mi | N |
| Borough, Southwark | 0.3 mi | E |
| Bankside, Southwark | 0.4 mi | N |
| Borough Market | 0.5 mi | NE |
| Elephant and Castle | 0.5 mi | S |
| Chaucer | 0.5 mi | SE |
| Waterloo, Lambeth | 0.6 mi | W |
| Queenhithe | 0.6 mi | N |
Worth knowing
Rules that come up in this work
Closing a company
Voluntary strike-off is available only to solvent companies. One that owes money it cannot pay needs a creditors' voluntary liquidation through a licensed insolvency practitioner, and directors who dissolve an insolvent company face personal consequences. For a solvent company the process takes three to four months from filing the DS01, with notice to creditors and shareholders within seven days.
Switching accountants
You can switch accountant at any point in the year. The new firm requests clearance and your records from the old one, which cannot withhold your own documents though it may hold its own working papers until its fees are settled. Agent authorisations with HMRC and Companies House are transferred, and the next deadline is picked up without a gap.
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.
Crypto records and reporting
HMRC treats cryptoassets as property. Swapping one token for another, spending crypto or gifting it are all disposals for Capital Gains Tax, and staking and lending rewards are income. Gains are computed under pooling rules with same-day and 30-day matching. From 2026 HMRC receives data from exchanges worldwide under the Cryptoasset Reporting Framework, so unreported activity is increasingly visible.
Allowable expenses
An expense is allowable against trading profit if it is incurred wholly and exclusively for the business. Materials, business travel other than ordinary commuting, a proportion of home running costs, software, insurance, professional fees, bank charges and protective clothing qualify. Client entertainment, ordinary clothing, fines and the private share of mixed-use costs do not.
Record keeping
HMRC requires records of all income and expenses, bank statements, invoices and receipts to be kept for at least five years after the 31 January filing deadline of the tax year they relate to, and companies must keep records for six years from the end of the accounting period. Digital copies are acceptable. Under Making Tax Digital the records must be kept in compatible software.
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.
Questions
Self Assessment Tax Returns questions from Cathedrals
What if my return is late?
We file late returns at the £179 rescue fee, which includes drafting a reasonable-excuse appeal where the facts support one. The £100 automatic penalty is HMRC's, not ours, and we tell you honestly whether an appeal has a realistic chance before you pay for it.
I have never filed before. Do I need a UTR first?
Yes. If you have not registered we handle the registration as part of the job and HMRC posts your Unique Taxpayer Reference within about ten working days. Start early if your first deadline is close, because HMRC will not accept a return without it.
How quickly can you file once I send my records?
Most straightforward returns are drafted within five working days of receiving complete records and filed the day you approve. In January we prioritise by deadline risk and tell you your slot when you book, so late bookers are not left guessing.
What does the £129 return cover?
A full SA100 with the supplementary pages for one income source, prepared, checked and filed online. Rental income, capital gains or several income sources move you to the £169 or £199 package, and we tell you which applies before we start, never on the invoice.
I am employed and have a small side income. Do I need a return?
If the side income is under £1,000 a year the trading allowance covers it and no return is needed. Above that you must register and file. If the side income is the only reason for the return, the £129 package applies and we make sure your PAYE figures from the P60 are reconciled correctly.
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.
How do I get started from Cathedrals?
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 Cathedrals 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 Cathedrals 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.
Fixed fees, filed on time, for Cathedrals
Tell us what you need. You get one fixed fee in writing, and nothing is filed until you approve it.