Startup Accountants · South West London
Startup accountants in Castelnau
If you are starting a company in Castelnau, the accounting decisions you make in the first three months, share structure, VAT registration timing, how founders are paid, whether to seek SEIS assurance, shape the next three years. We get them right for startups across South West London, online, for a monthly fee agreed before you join.
from £59/mo · fixed, per month
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
Who this is for
Startup Accountants for Castelnau
New and early-stage companies in Castelnau: founders incorporating for the first time, technology and product startups preparing to raise seed investment, service businesses moving from side project to full time, two or three co-founders who need the equity and payroll structured properly, and companies in their first two years who set up alone and want it done properly now.
What is included
Everything inside the fixed fee
- Company formation and HMRC registrations in the Launch package, or a review of what has already been set up
- Cloud bookkeeping configured for a growing business, with bank feeds and expense capture from day one
- Annual accounts and Corporation Tax return, with first-period and long-period rules handled
- VAT registration timing advised and quarterly returns run in the Grow and Scale packages
- Payroll for founders and first hires, with auto-enrolment, in the Scale package
- SEIS and EIS advance assurance applications prepared for founders raising investment
How it works
Startup Accountants from Castelnau, step by step
Tell us your situation
A short message or call about what you do and what needs filing. We ask the questions that determine the right package and nothing more.
Fixed fee in writing
You receive one price for the work, confirmed by email before anything starts. It does not change if the job takes longer than we expected.
Send records, review the draft
Records come by WhatsApp or email. We prepare the draft, explain the figures in plain English and answer your questions.
We file, you get the receipts
Once you approve and the fee is settled, we submit electronically and forward the HMRC or Companies House acknowledgement the same day.
Why IGI
What you get in Castelnau
The price for startup accountants is published on this page and is what a client in Castelnau pays. We confirm it in writing first, and the invoice matches the quote.
Deadline-first: the dates that matter for startup accountants are shown at the top of this page, diarised for every Castelnau client and chased before they arrive.
Online only, UK based. There is no office in Castelnau to pay for, which is why the fee is the same here as anywhere in England; the work is done by people in the UK who answer the same day.
Continuity matters in startup accountants: the person who prepared last year's work for your Castelnau business prepares this year's, and remembers what was agreed.
Plain English, with the numbers. Every draft for Castelnau comes with a short explanation of what the figures mean and what, if anything, you should do about them.
You stay in control of startup accountants: drafts go to Castelnau clients first, with the figures explained, and nothing leaves us until you say so.
Local facts
About Castelnau
Castelnau is in South West London, within Richmond upon Thames, in the SW13 postcode district, England. Income tax in England follows the UK rates: 20% basic to £50,270, 40% higher to £125,140 and 45% additional, with the personal allowance of £12,570 tapered away above £100,000. National Insurance, VAT and Corporation Tax are UK-wide, and Stamp Duty Land Tax applies to property purchases.
| Place | Distance | Direction |
|---|---|---|
| Barnes | 0.6 mi | SW |
| Riverside, Hammersmith and Fulham | 0.7 mi | E |
| Mortlake and Barnes Common | 0.8 mi | SW |
| Chiswick Homefields | 0.8 mi | NW |
| Fulham Reach | 1.0 mi | NE |
| Ravenscourt Park | 1 mi | N |
| Palace Riverside | 1 mi | E |
| Munster | 1 mi | E |
Worth knowing
Rules that come up in this work
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.
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.
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
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.
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.
Director's loan accounts
A director's loan account records money moving between a director and the company that is not salary or dividend. If the director owes the company money nine months and one day after the year end, the company pays section 455 tax at 35.75% of the balance, refundable only when the loan is repaid. Loans over £10,000 are also a benefit in kind unless interest is charged at HMRC's official rate.
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.
Questions
Startup Accountants questions from Castelnau
Do I need a separate business bank account?
Legally the company must have its own account because it is a separate person from you; using a personal account mixes funds and creates director's loan problems. Digital business banks open accounts quickly for new companies, and we connect the feed to your software as part of setup.
What do investors expect to see in the accounts?
Clean, current bookkeeping; a cap table that matches Companies House; founder payments properly documented; VAT and PAYE up to date; and management accounts showing runway. Due diligence on a seed round routinely finds undocumented director's loans and unfiled confirmation statements, both of which cost time at exactly the wrong moment.
When are a new company's first filings due?
The first confirmation statement is due within 14 days of the first anniversary of incorporation. The first accounts are due 21 months after incorporation. Corporation Tax is due nine months and one day after the first accounting period ends, and the first period is often longer than a year, which creates two CT600s. We handle the split.
Can I claim startup costs incurred before incorporation?
Yes. Pre-trading expenses incurred up to seven years before the company started trading, which would have been deductible if incurred while trading, are treated as incurred on the first day of trading. Keep the receipts. Equipment you bring in can be transferred to the company at market value.
What is SEIS/EIS advance assurance and do I need it?
Investors in qualifying early-stage companies get income tax relief of 50% (SEIS) or 30% (EIS) and capital gains exemptions, which makes raising much easier. Advance assurance is HMRC's confirmation in principle that your company qualifies, and most angel investors insist on it. Our £299 service prepares and submits the application.
What are the SEIS limits?
A company can raise up to £250,000 under SEIS within the first three years of trading, with gross assets under £350,000 and fewer than 25 employees. EIS allows up to £5 million a year and £12 million in total, for companies under seven years old with fewer than 250 employees. Trading activities must qualify; some are excluded.
Do you have an office in Castelnau?
No. IGI Accounting is an online-only firm. We serve Castelnau and every other UK postcode remotely, with records sent by WhatsApp or email and everything filed electronically. The absence of local premises is why the fee for startup accountants is the same in Castelnau as anywhere else in the country, and why there is nothing to visit and nothing to print.
Is startup accountants in Castelnau really the same price as elsewhere?
Yes. The fee published on this page is what a client in Castelnau pays and what a client in any other part of England pays. It is confirmed in writing before work starts and the invoice matches the quote. Where a higher package applies because your situation is more complex, we say so at the quote stage, never afterwards.
Let us take the deadlines off your plate in Castelnau
Tell us what you need. You get one fixed fee in writing, and nothing is filed until you approve it.