Accounting

Accounting Software Support · Central London

Accounting software setup & support in Mansion House

Accounting software setup, migration, cleanup and training for businesses in Mansion House. A new file set up with the chart of accounts, bank feeds and VAT configured is £99; a migration with history is from £199; repairing a messy file is from £149. Fixed fees, published, the same in Mansion House as across England.

from £99 · fixed, one-off

Next deadlines

  • VAT return and payment for the quarter that ended last month
  • MTD quarterly update deadline (7 August, 7 November, 7 February, 7 May)
  • VAT return and payment for the quarter that ended last month
  • VAT return and payment for the quarter that ended last month

Who this is for

Accounting Software Support for Mansion House

Sole traders and small companies in Mansion House starting with cloud accounting for the first time, businesses moving between platforms or off spreadsheets for Making Tax Digital, owners whose software file has become unreliable after years of unreconciled entries, and teams who need to be taught to use the system they already have.

What is included

Everything inside the fixed fee

  • Platform recommendation based on your business, VAT position, MTD obligations and budget, not on commission
  • Chart of accounts tailored to your trade, with VAT codes, bank feeds and opening balances configured
  • Migration from another platform or spreadsheets with historical transactions, customers, suppliers and balances carried over
  • File cleanup: duplicates removed, bank reconciled, suspense cleared, VAT returns reconciled to what was filed
  • Automations configured: receipt capture, recurring invoices, payment reminders, bank rules
  • Recorded 90-minute training session for you or your team, with a written quick-reference afterwards

How it works

Accounting Software Support from Mansion House, step by step

  1. 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.

  2. 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.

  3. 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.

  4. 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

The IGI way of working, in Mansion House

No hourly rate and no surprise invoice. Mansion House clients know the fee for accounting software support before they send a single document, and it stays fixed.

We work to the HMRC and Companies House calendar, not an appointment diary. Clients in Mansion House get reminders at 60, 30 and 7 days before each date that applies to accounting software support.

Online only, UK based. There is no office in Mansion House 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 accounting software support: the person who prepared last year's work for your Mansion House business prepares this year's, and remembers what was agreed.

We explain accounting software support in the words Mansion House business owners use, not in accountant's shorthand, and we show our working so you can check it.

Nothing is filed for Mansion House until you have reviewed and approved it. You see the draft, you ask questions, you sign off, then we submit and send you the receipt.

Local facts

About Mansion House

Mansion House is in Central London, within City of London, in the EC4V 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.

Nearby places we also serve for accounting software support
PlaceDistanceDirection
Vintry0.1 miSE
Queenhithe0.1 miSW
Cordwainer0.1 miNE
Bread Street, City of London0.2 miNW
Cheapside, City of London0.2 miNE
Walbrook0.2 miE
St Paul's, City of London0.2 miNW
Cannon Street0.2 miE

Worth knowing

Rules that come up in this work

Switching accountants

Changing accountant is simpler than most people fear. You authorise the new firm, which writes to the old one for professional clearance and your records; the outgoing accountant must hand over your own documents and usually does within two weeks. The new firm registers as your agent with HMRC and picks up the next filing. There is no need to wait for a year end.

Closing a company

A solvent company that has finished its purpose can be dissolved by voluntary strike-off: form DS01 with a £13 Companies House fee, after three months without trading and with all debts paid, final accounts and tax return filed, and assets distributed. HMRC objects to any application where returns or tax are outstanding, so the sequence matters more than the form.

Record keeping

Good records are the difference between a quick enquiry and a long one. For the self-employed, five years after the filing deadline; for companies, six years from the year end; for VAT, six years. Photographs of receipts, PDF statements and software exports all count. The requirement is to keep records, not paper, and a well-organised cloud folder satisfies it.

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.

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.

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.

Dormant companies

Dormancy is a status that is easy to lose. The strict rule is no accounting transactions other than share capital and Companies House fees, which means no bank account activity at all in practice. Fees should be paid personally by the director. A company that traded and has stopped becomes dormant only after its final trading accounts and tax return are filed and HMRC is told.

Questions

Accounting Software Support questions from Mansion House

How long does setup or migration take?

A new setup is usually complete within three working days of receiving your details and last accounts. A migration takes one to two weeks depending on the volume of history and the state of the old data. A cleanup depends on how broken the file is, and we give you a timeline with the fixed quote.

Do I need Making Tax Digital-compatible software?

If you are VAT registered, yes, already. If you are a sole trader or landlord with qualifying income over £50,000, yes, since April 2026, with lower thresholds following. Every platform we set up is MTD-compatible and we authorise it with HMRC as part of the setup.

Which software do you recommend?

It depends on your business. Sole traders with simple needs suit the low-cost MTD-compatible platforms; VAT-registered businesses with stock, multiple currencies or e-commerce integrations need one of the major cloud platforms. We recommend on fit and price and we do not take commission, so the advice is not steered by referral income.

What does the £99 setup include?

Creating the file with your business details and financial year, a chart of accounts tailored to your trade, VAT scheme and codes configured, bank and card feeds connected, opening balances entered from your last accounts, invoice template branded, and the software authorised with HMRC for MTD where relevant. You come away ready to use it.

Can you move my history from my old software?

Yes. Migration from £199 brings across customers, suppliers, outstanding invoices and bills, the chart of accounts and historical transactions, typically for the current and previous financial years, with balances reconciled to the old system before it is closed. More history or very large files are quoted before we start.

What is a file cleanup and when do I need one?

When the bank has not reconciled for months, the suspense account has a large balance, there are duplicate transactions or customers, VAT returns in the software do not match what was filed, or the balance sheet contains figures nobody can explain. From £149 we reconcile, correct and document the file so it can be relied on.

Which deadlines matter most for accounting software support?

The next four dates that apply to accounting software support are shown at the top of this page, calculated from today. For Mansion House 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.

How do I get started from Mansion House?

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 accounting software support. Once you confirm, we tell you exactly which records to send and the work begins. Most Mansion House clients are set up within a day.

One message from Mansion House, one fixed price

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