Accounting

Contractor Accountants · West London

Contractor accountants in Harmondsworth

IT, engineering, finance and healthcare contractors in Harmondsworth use us because the service is built for how they work: a company with one or two directors, income from a few clients a year, and an IR35 question on every new engagement. Fixed monthly packages across West London, with an IR35 contract review at £99 whenever you need one.

from £75/mo · fixed, per month

Next deadlines

  • PAYE and National Insurance for last month paid to HMRC (electronic)
  • PAYE and National Insurance for last month paid to HMRC (electronic)
  • PAYE and National Insurance for last month paid to HMRC (electronic)
  • Online Self Assessment filing deadline and balancing payment due

Who this is for

Contractor Accountants for Harmondsworth

Contractors and interim professionals in Harmondsworth working through their own limited company: IT and software contractors, engineers, project managers, interim finance staff, consultants, medical and allied health locums who have incorporated, and permanent employees about to go contracting who need the company set up and the first engagement reviewed.

What is included

Everything inside the fixed fee

  • Statutory accounts and Corporation Tax return prepared and filed each year
  • Director payroll run monthly with RTI submissions and the salary set at the efficient level
  • Dividend vouchers and board minutes for every distribution, with the available reserves checked first
  • Quarterly VAT returns and bookkeeping in the Plus and Complete packages
  • Director's Self Assessment and an annual planning call in the Complete package
  • IR35 status reviews of your contracts and working practices, with a written opinion

How it works

Contractor Accountants from Harmondsworth, 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

What you get in Harmondsworth

No hourly rate and no surprise invoice. Harmondsworth clients know the fee for contractor accountants 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 Harmondsworth get reminders at 60, 30 and 7 days before each date that applies to contractor accountants.

We serve Harmondsworth 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 contractor accountants.

A named person handles your contractor accountants from Harmondsworth and knows the file, so you are not re-explaining your business to a different helpdesk each time.

We explain contractor accountants in the words Harmondsworth business owners use, not in accountant's shorthand, and we show our working so you can check it.

Nothing is filed for Harmondsworth 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 Harmondsworth

Harmondsworth is in West London, within Hillingdon, in the UB7 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 contractor accountants
PlaceDistanceDirection
Sipson0.8 miE
Longford, Hillingdon0.8 miSW
Heathrow Villages1 miSE
West Drayton1 miN
Thorney, Buckinghamshire1 miNW
Heathrow2 miSE
Yiewsley2 miN
Harlington, Hillingdon2 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

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.

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.

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.

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 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.

Crypto records and reporting

Crypto tax splits into capital gains on disposals and income on rewards, with different rates and different reporting. The £3,000 annual exempt amount and the 18% and 24% rates apply to gains; staking, mining and airdrop income is taxed at marginal income tax rates. HMRC's nudge letters to holders have increased sharply, and a voluntary disclosure before one arrives is treated far more leniently.

Questions

Contractor Accountants questions from Harmondsworth

I am about to leave permanent employment to contract. Where do I start?

With the company formation and the first contract review. Our £99 formation-plus-registrations package sets up the company with Corporation Tax and PAYE registered; the IR35 review of your first engagement decides how the income will be taxed. Join the Essential package from the month you start invoicing.

Do I need business insurance?

Most client contracts require professional indemnity and public liability cover, and employer's liability is a legal requirement if the company employs anyone other than the director. Insurance is not something we sell, but we tell you what your contracts require and the premiums are deductible for Corporation Tax.

Can the company pay into my pension?

Yes, and it is one of the most efficient ways to extract value. Employer pension contributions are deductible for Corporation Tax, free of National Insurance and not taxed on you, up to the £60,000 annual allowance (tapered for very high earners). We include pension planning in the Complete package's annual call.

What happens between contracts?

The company continues and so do the filings, but we can reduce the salary and pause dividends. If you expect a long gap we discuss whether to keep the company trading, make it dormant or close it. The monthly fee continues while the company is active because the compliance does, but we review it with you if circumstances change.

How should I pay myself from the company?

The usual approach is a salary around the National Insurance thresholds, which keeps your State Pension record intact and is deductible for Corporation Tax, with the rest as dividends taxed at the dividend rates after the £500 allowance. The exact split depends on your other income and the company's profit, and we set it at the start of each tax year.

What is IR35 and does it affect me?

IR35 asks whether, but for the company, you would be an employee of your client. If a contract is inside IR35 the income is taxed like employment. Since 2021 medium and large private-sector clients make the determination and deduct tax at source; for small clients the contractor decides. We review contracts and working practices and give a written opinion for £99.

Do you have an office in Harmondsworth?

No. IGI Accounting is an online-only firm. We serve Harmondsworth 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 contractor accountants is the same in Harmondsworth as anywhere else in the country, and why there is nothing to visit and nothing to print.

Is contractor accountants in Harmondsworth really the same price as elsewhere?

Yes. The fee published on this page is what a client in Harmondsworth 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.

Ready to fix your fee in Harmondsworth?

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