South West London · England
Accountants in Mortlake and Barnes Common
If you run a business or have a tax return to file in Mortlake and Barnes Common, this page lists what we do, what it costs and when it is due. The fees are fixed and identical to those for every other place in South West London. We serve Mortlake and Barnes Common remotely, which means no travel, no appointments and no premises to pay for, and we track the HMRC and Companies House deadlines so that you do not have to.
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 Mortlake and Barnes Common and what it costs
All 26 services below are available to Mortlake and Barnes Common clients at the published fee. Every fee is fixed and confirmed in writing before work starts.
Why IGI
Working with Mortlake and Barnes Common businesses
We built the service around what business owners in places like Mortlake and Barnes Common actually complain about: not knowing what the accountant will charge, finding out about a deadline after it has passed, and receiving a set of accounts with no explanation. Each is fixed by design: fixed fees, deadline tracking shown on every page, and a plain-English summary with every draft for Mortlake and Barnes Common clients.
A named person handles your self assessment tax returns from Mortlake and Barnes Common and knows the file, so you are not re-explaining your business to a different helpdesk each time.
We serve Mortlake and Barnes Common 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 self assessment tax returns.
Nothing for Mortlake and Barnes Common 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.
Local facts
About Mortlake and Barnes Common
Mortlake and Barnes Common sits in South West London, within Richmond upon Thames (Mortlake & Barnes Common ward), postcode district SW13. 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 |
|---|---|---|
| Barnes | 0.3 mi | N |
| Mortlake | 0.8 mi | W |
| Castelnau | 0.8 mi | NE |
| East Sheen | 0.9 mi | SW |
| West Putney | 1 mi | SE |
| Chiswick Homefields | 1 mi | N |
| South West London | 1 mi | SE |
| Chiswick Riverside | 1 mi | NW |
All places in South West London · South West London places beginning with M
Worth knowing
Rules that affect most businesses here
Making Tax Digital for Income Tax
MTD for Income Tax replaces one annual return with quarterly digital updates and a year-end declaration, submitted from software. The threshold is gross trading and property income, measured two years earlier, and started at £50,000 in April 2026 before falling to £30,000 in April 2027. Anyone affected needs digital record keeping in place before their start date, not after.
Late filing penalties
Lateness is expensive in a way that compounds. For individuals, £100 immediately, then daily penalties, then percentage-based ones at six and twelve months, with interest running on unpaid tax throughout. For companies, Companies House penalties scale with delay and double on repeat, and HMRC adds its own for a late CT600. Filing on time is the cheapest tax planning there is.
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.
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.
Director's loan accounts
The most common tax problem in owner-managed companies is an overdrawn director's loan account: drawings taken during the year that were never declared as dividends or salary. The company faces a 35.75% charge on the balance outstanding nine months after the year end, and the director may have a benefit in kind. We review the account before every year end to clear it properly.
Questions
Questions from Mortlake and Barnes Common
Why are the fees the same in Mortlake and Barnes Common as in London?
Because the cost of an accountant is mostly premises and that is a cost we do not have. The work is done online by UK-based staff, so a client in Mortlake and Barnes Common pays exactly the published fee, as does a client in central London or a Highland village. The fee is confirmed in writing before anything starts.
Which services are available in Mortlake and Barnes Common?
Every service on this page is available to businesses and individuals in Mortlake and Barnes Common, at the fee shown. Core compliance work, accounts, tax returns, bookkeeping, VAT, payroll and company formation, is listed with its own local page. Specialist services such as R&D, crypto tax and HMRC enquiry support are national services delivered the same way from anywhere in the UK.
I already have an accountant in Mortlake and Barnes Common. How hard is it to switch?
It takes about two weeks and costs nothing extra. You authorise us, we write to your current accountant for professional clearance and your records, and we transfer the agent authorisations. We pick up the next filing without a gap. You do not need to wait for a year end, and we tell you honestly if switching mid-job would be awkward.
Can you deal with HMRC and Companies House for me?
Yes. Once you authorise us as your agent, HMRC and Companies House correspond with us about the filings we make for your Mortlake and Barnes Common business, and we can see your accounts and respond on your behalf. Authorisation is free and takes a few days to activate. Routine correspondence about work we have filed is handled at no extra charge.
Is self assessment tax returns in Mortlake and Barnes Common really the same price as elsewhere?
Yes. The fee published on this page is what a client in Mortlake and Barnes Common 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.
Do you have an office in Mortlake and Barnes Common?
No. IGI Accounting is an online-only firm. We serve Mortlake and Barnes Common 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 self assessment tax returns is the same in Mortlake and Barnes Common as anywhere else in the country, and why there is nothing to visit and nothing to print.
Get a fixed quote for Mortlake and Barnes Common today
Tell us what you need. You get one fixed fee in writing, and nothing is filed until you approve it.