CIS Tax Returns · Central London
CIS tax returns in Marylebone High Street
The Construction Industry Scheme takes 20% off a subcontractor's invoices before they are paid, and in Marylebone High Street that money is often more than the tax actually owed. We prepare the return, reclaim the difference and chase HMRC for the refund. Contractors get the monthly CIS300 filed by the 19th with statements issued. Fixed fees, agreed in writing.
from £30/mo · fixed, per month
Next deadlines
- VAT return and payment for the quarter that ended last month
- CIS monthly return and deduction statements to subcontractors
- PAYE and National Insurance for last month paid to HMRC (electronic)
- VAT return and payment for the quarter that ended last month
Who this is for
CIS Tax Returns for Marylebone High Street
Construction businesses in Marylebone High Street on either side of the scheme: sole trader and limited company subcontractors with 20% or 30% deductions to reclaim, contractors who pay subcontractors and must file monthly, businesses that do both, and established subcontractors with turnover high enough to apply for gross payment status and stop deductions altogether.
What is included
Everything inside the fixed fee
- Subcontractor verification with HMRC and the correct deduction rate (20%, 30% or gross) applied each time
- Monthly CIS300 return filed by the 19th with deduction statements issued to every subcontractor
- Subcontractor annual Self Assessment with CIS deductions reclaimed and the refund chased with HMRC
- Gross payment status application prepared with the turnover, compliance and business tests evidenced
- Domestic reverse charge VAT checked on every CIS invoice in both directions
- CIS deductions offset against PAYE for limited company subcontractors through the EPS each month
How it works
CIS Tax Returns from Marylebone High Street, 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 Marylebone High Street businesses file with IGI
One fixed fee for cis tax returns in Marylebone High Street, agreed in writing before any work starts and never changed part-way through the job, however long it takes us.
We work to the HMRC and Companies House calendar, not an appointment diary. Clients in Marylebone High Street get reminders at 60, 30 and 7 days before each date that applies to cis tax returns.
We serve Marylebone High Street remotely by design: records by WhatsApp or email, drafts back for approval, filing electronic. The saving on premises is passed to you in the fee for cis tax returns.
Continuity matters in cis tax returns: the person who prepared last year's work for your Marylebone High Street business prepares this year's, and remembers what was agreed.
We explain cis tax returns in the words Marylebone High Street business owners use, not in accountant's shorthand, and we show our working so you can check it.
You stay in control of cis tax returns: drafts go to Marylebone High Street clients first, with the figures explained, and nothing leaves us until you say so.
Local facts
About Marylebone High Street
Marylebone High Street is in Central London, within Westminster, in the W1G 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 |
|---|---|---|
| Marylebone, Westminster | 0.1 mi | W |
| Baker Street, Westminster | 0.4 mi | NW |
| West End of London | 0.4 mi | SW |
| Bryanston and Dorset Square | 0.5 mi | W |
| Oxford Circus | 0.5 mi | SE |
| Fitzrovia | 0.6 mi | NE |
| Marble Arch | 0.6 mi | SW |
| Mayfair | 0.6 mi | S |
Worth knowing
Rules that come up in this work
Workplace pensions and auto-enrolment
Workplace pension compliance is part of payroll, not separate from it. Each pay period the payroll assesses who is eligible, calculates employer and employee contributions on qualifying earnings between the lower and upper thresholds, and sends the contribution file to the scheme. The minimum total is 8%, and many employers choose to contribute more as a recruitment advantage.
Employer National Insurance
Employers pay National Insurance at 15% on each employee's earnings above the £5,000 secondary threshold, following the April 2025 changes. The Employment Allowance offsets up to £10,500 of this for eligible employers, which for a small team often removes the liability entirely, but companies where the director is the only employee do not qualify.
The trading and property allowances
Not every small income needs a tax return. The trading allowance exempts the first £1,000 of self-employment or casual income and the property allowance does the same for rental income, each measured on gross receipts. They cannot be combined with rent-a-room relief on the same income, and claiming the allowance means giving up the expense deduction for that source.
Dormant companies
Companies formed to protect a name or hold a future business are dormant but not exempt: Companies House still expects dormant accounts within nine months of the year end and a confirmation statement annually with its £50 fee, and HMRC must be told the company is dormant or it will demand Corporation Tax returns. The filings are short, but the penalties for missing them are the same as for a trading company.
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
Most crypto holders have taxable events they do not recognise, because every swap is a disposal even when no pounds change hands. The computation requires the complete transaction history from every exchange and wallet, pooled by asset with HMRC's matching rules applied. Exchange-generated tax reports are frequently wrong because they cannot see transfers between a user's own wallets.
Allowable expenses
The expenses sole traders most often miss are home working costs, claimed by actual proportion or HMRC's flat rate, the business share of phone and internet, mileage at 45p for the first 10,000 business miles, and training that maintains existing skills. The ones most often claimed wrongly are commuting, entertaining customers and clothes that could be worn outside work.
Questions
CIS Tax Returns questions from Marylebone High Street
I have not filed for several years. Can you catch me up?
Yes. Late Self Assessment returns can be filed for the last four tax years to reclaim CIS deductions, and HMRC will offset refunds against any penalties. We quote a fixed fee for the set based on the number of years and reconcile each year's statements. The sooner this is done the more years remain claimable.
Can my CIS deductions be set against my VAT or other taxes?
For sole traders, no; CIS deductions are credited against your income tax and Class 4 National Insurance through Self Assessment, with the excess refunded. For companies, deductions are offset against PAYE and CIS owed, and the remaining balance is repaid by HMRC after the year end or, on request, set against Corporation Tax.
What rate do I deduct from a subcontractor?
You must verify each new subcontractor with HMRC before the first payment. HMRC tells you 20% if they are registered, 30% if not, or 0% if they hold gross payment status. Deductions apply to the labour element only, never to materials, VAT or plant hire. We verify every new subcontractor and record the result.
When are contractor returns due?
The CIS300 monthly return covers the tax month to the 5th and must reach HMRC by the 19th. Deduction statements must go to subcontractors by the same date. A nil return is still required if you paid no subcontractors. Late returns cost £100 immediately, rising to £200 after two months and then percentage-based penalties.
How much CIS refund can I expect?
It depends on your profit and expenses. Deductions are 20% of the labour element of your invoices; tax is only due on profit after expenses and the £12,570 personal allowance, with Class 4 National Insurance on top. Many subcontractors earning under £35,000 get back several thousand pounds. We give you the figure before filing.
What does the £149 subcontractor return include?
Your full Self Assessment with the self-employment pages, every CIS deduction statement reconciled to your income, allowable expenses claimed, the refund calculated and the return filed. We then track the repayment with HMRC, which usually arrives within two to six weeks of filing in the quieter months.
How do I get started from Marylebone High Street?
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 cis tax returns. Once you confirm, we tell you exactly which records to send and the work begins. Most Marylebone High Street clients are set up within a day.
Which deadlines matter most for cis tax returns?
The next four dates that apply to cis tax returns are shown at the top of this page, calculated from today. For Marylebone High Street 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 Marylebone High Street
Tell us what you need. You get one fixed fee in writing, and nothing is filed until you approve it.