Why the setup steps matter more than the day rate

Securing a contract outside IR35 changes your financial picture significantly, but only if the administration around it is right from the start. A contractor who takes outside IR35 income into a personal account, skips a contract review, or waits six months to sort out VAT and pensions will have done the harder work of winning the contract and lost most of the tax efficiency it was supposed to deliver. The steps below are sequential by necessity: some decisions cannot be undone retrospectively, and a few must happen before the first pound of income arrives.

The setup mechanics for the limited company itself sit in the dedicated guide to setting up a limited company for contracting. This checklist assumes the company is either already in place or being formed in parallel, and focuses on the financial and compliance decisions you need to make at contract-start.

Item 1: Company and bank account in place before the first invoice

Company income belongs to the company, not to you personally, from the moment it arises. Raising an invoice before the company exists means the income is yours personally, with PAYE and self-assessment consequences that are difficult and sometimes impossible to unwind. Allowing company income to land in a personal account creates an overdrawn director's loan account immediately, attracting a section 455 charge (currently 35.75% on loans made on or after 6 April 2026) if it is not cleared within nine months and one day of the company's accounting period end.

Practically, the company should be incorporated and the business bank account open before you issue any invoice. Many contractors register the company and open a challenger bank account in the same week. The business bank account carries the company's name on every transaction, keeps bookkeeping clean, and is the reference point for VAT returns, corporation tax computations, and any future HMRC enquiry.

The full list of incorporation steps, including what to do about the company's registered address, share structure, and accounting reference date, is in the set-up-limited-company-contractor guide. Tick this one off first. Everything else in this checklist assumes it is done.

Item 2: The VAT decision

Most contractor services are standard-rated at 20%. Registration becomes compulsory once VAT-taxable turnover exceeds £90,000 in any rolling 12 months, or where it is expected to exceed that within the next 30 days. Both the registration threshold and the deregistration threshold (£88,000) have been frozen since 1 April 2024.

A large proportion of contractors register voluntarily below the threshold, and the case for doing so is usually straightforward. Your end client is almost always a VAT-registered business that will recover the VAT you charge, so the 20% you add to invoices costs them nothing. In exchange, you can reclaim VAT on your business purchases (accountancy fees, equipment, software, professional subscriptions) and avoid having to monitor a rolling turnover trigger. Voluntary registration also removes a potential awkwardness when clients expect a VAT number on invoices.

The main counter-argument applies to contractors whose cost base is almost entirely labour (no goods spend of any scale), and who are considering whether the Flat Rate Scheme (FRS) adds simplicity. Under the FRS, a business pays a fixed percentage of VAT-inclusive turnover rather than tracking input VAT. However, the limited-cost-trader rate of 16.5% applies where goods spending is less than 2% of turnover or less than £1,000 per year, and for most labour-only contractors that test is failed every quarter. The 16.5% rate eliminates most of the FRS financial benefit, so model standard VAT accounting against the applicable FRS percentage before choosing the scheme.

The VAT decision should be made before the first invoice goes out. Registering retrospectively is allowed but creates an obligation to account for VAT on invoices already raised, which requires either re-invoicing clients or absorbing the VAT from your own receipts.

Item 3: Contract review before signing

The contract you sign before starting an engagement is one of two things that determine your IR35 position. The other is how the engagement actually operates in practice. A professional contract review before signing addresses the written terms; your day-to-day working practices address the second.

The written contract should reflect three things clearly. First, control: it should describe a relationship in which you determine how the work is done, not one in which the client directs your method, hours, and location as it would an employee. Second, substitution: a genuine right to send a qualified substitute at your own expense, which the client cannot unreasonably refuse, is one of the strongest outside-IR35 indicators, but only if it is real and unfettered. A substitution clause that the client would never accept in practice carries little weight. Third, mutuality of obligation: the contract should not imply ongoing obligations to offer and accept further work beyond the specific engagement.

The ir35-contract-review-checklist guide goes through the specific clauses to examine and the red-flag wording to remove. The IR35 status review service provides a professional assessment of both the contract and the working practices, which is the only combination that gives a defensible position.

HMRC's CEST tool (updated 30 April 2025) is a useful first screen and an audit-trail document. HMRC says it will stand behind a CEST result where the inputs are accurate, in line with the guidance, consistent with the working practices, and there is no avoidance. However, it does not bind a tribunal, its treatment of mutuality of obligation is narrower than the case law, and a result that does not match the actual working practices is worthless. Never treat a CEST "outside" result as a guarantee.

The working-practices principle is worth stating plainly as a standalone: courts and tribunals look at what actually happened in an engagement, not just what the contract says. A clean contract with employee-like working practices will not hold.

Item 4: Insurances (state from the outset)

Most client and agency contracts require proof of at least two insurances before an engagement begins: professional indemnity (PI) and public liability (PL). Professional indemnity covers claims that your professional advice or service caused financial loss to a third party. Public liability covers claims arising from third-party injury or property damage. The required coverage levels vary by sector and client, so read the contract schedule before purchasing.

Beyond the contractually required cover, consider two additional policies. Employer's liability insurance becomes legally required if you engage any employees or sub-contractors, even on a short-term basis. Relevant life insurance (written through the company) and income protection are worth modelling as tax-efficient personal protection, since premiums can in some cases be treated as a company expense.

None of these are optional decisions to revisit after the first invoice. An agency can withdraw a placement if proof of insurance is not provided before the start date. Get quotes, confirm the coverage levels required by the contract, and have the documents ready before signing.

Item 5: Expense records from day one

Every business expense must be documented at the point it is incurred, not reconstructed from memory during an HMRC enquiry. The burden of proof rests with the company: a receipt and a brief contemporaneous note of the business purpose are required for every claim. HMRC can open an enquiry for the current and preceding years, so records from the first day of the first contract can be asked for years later.

The main allowable expenses for a PSC contractor outside IR35 include: accountancy and bookkeeping fees; business insurance premiums (PI, PL and any others used wholly for the business); equipment, hardware and software purchased wholly and exclusively for the business; employer pension contributions to a registered scheme; business travel to a temporary workplace; subsistence incurred on genuine overnight or distant business travel; a reasonable apportionment of home costs where a home office is used regularly and exclusively for business; and business-only apportionments of phone and internet costs.

Business travel is the area where errors most commonly arise. From 6 April 2026 the approved mileage allowance payment (AMAP) rate for cars and vans is 55p per mile for the first 10,000 business miles in the tax year, and 25p per mile above that. The 45p rate that applied until 5 April 2026 is now historical. Journeys between your home and a client site that has become a permanent workplace (broadly, where you have spent or expect to spend more than 40% of your working time there over more than 24 months) do not qualify as business travel. The 24-month rule is expectation-based: relief stops from the point at which it becomes clear the engagement will exceed the threshold, not from month 24 itself.

A bookkeeping habit started on day one is far less onerous than a reconstruction exercise at year end. Many contractors use accounting software with a receipt-capture app linked to the business bank account. Set this up as part of the initial company administration.

Item 6: Salary and dividend basics

A PSC director extracts profit from the company through some combination of salary, which is a deductible company expense subject to PAYE and National Insurance, and dividends, which are paid from post-corporation-tax profit and taxed on the director at dividend rates with no NIC charge. The split that is most efficient for your specific company depends on factors that vary between contractors.

The key variable is whether your company can claim the Employment Allowance (£10,500 for 2026/27). A single-director company with no other employees cannot claim the Employment Allowance. For those companies, the typical target salary range for 2026/27 is between the secondary threshold (£5,000, below which no employer NIC is due) and the lower earnings limit (£6,708, the point at which a qualifying NI year is preserved). Taking a salary at the LEL of £6,708 means the company pays a small amount of employer NIC (15% on the £1,708 between £5,000 and £6,708) in exchange for a state pension qualifying year. That trade-off is usually worthwhile but should be modelled for your circumstances.

Where the company employs a genuine additional member of staff (for example, a spouse doing real administrative work) and can therefore claim the Employment Allowance, taking salary up to £12,570 (the personal allowance and primary threshold for 2026/27) typically produces a better overall outcome, because the Employment Allowance offsets the employer NIC on the extra salary and the company gets corporation tax relief on the higher salary deduction. Even without the Employment Allowance, taking the full £12,570 can give a modest net benefit at current rates because the corporation tax saving on the extra salary can exceed the extra employer NIC cost; model it rather than assuming one answer.

Dividends drawn from the company use the £500 dividend allowance first (2026/27), then fall into the relevant band: 10.75% at the ordinary (basic-rate) level, 35.75% at the upper (higher-rate) level, and 39.35% at the additional rate. These rates apply from 6 April 2026 under Finance Act 2026 s.4, and represent an increase from the 8.75%/33.75% rates that applied in 2025/26 and earlier. Planning the split to use the basic-rate band efficiently and to avoid the £100,000 personal-allowance taper is the core of the annual tax-planning exercise.

The director-salary-dividend-split guide works through the full framework with 2026/27 figures, including the Employment Allowance fork and the interaction with the higher-rate threshold. Get the salary level agreed with your accountant before the first payroll run, not after.

Item 7: Pension contribution, started early

The employer pension contribution from the PSC is the single most tax-efficient extraction route available to a contractor director. It is deductible against corporation tax on a paid basis, attracts no employer NIC and no employee NIC, and is not taxed as income when it enters the pension. At the small profits rate of 19%, a £10,000 employer contribution saves £1,900 in corporation tax that would otherwise be paid before the remaining profit could be extracted as a taxed dividend. At the 25% main rate the saving is £2,500.

The annual allowance for 2026/27 is £60,000, covering all contributions (employer and personal combined). Unused annual allowance from the previous three tax years can be carried forward and used after the current year's allowance is exhausted, which allows a large one-off employer contribution in a high-profit year. However, carry-forward only works where you were a member of a registered pension scheme in the year you are carrying forward from. Starting a pension early, even with a modest employer contribution in year one, preserves those carry-forward years. Delaying by a year means that year drops off the three-year window permanently.

The employer contribution route is particularly important for a low-salary/high-dividend structure. A personal pension contribution is limited to 100% of your relevant UK earnings, and for a director taking salary of £6,708 that is a ceiling of £6,708 on personal contributions (before any carry-forward). The employer contribution from the company is not restricted by your salary level in the same way: it is tested only against the annual allowance and the wholly-and-exclusively requirement. This is why most PSC contractors use employer contributions, not personal ones, as their primary pension-funding mechanism.

The contractor pension employer contributions guide and the carry-forward guide cover the mechanics in full, including the tapered annual allowance that applies where adjusted income exceeds £260,000 (2026/27) and the money purchase annual allowance (£10,000) that is triggered by flexible drawdown. Set up a pension before the end of your first financial year; ideally in the first month.

Bringing it together: a sequenced checklist

The decisions above are not equally urgent, but they have an order. Some must happen before the first invoice; others need to be resolved in the first few weeks to avoid costly corrections later.

Before the first invoice

  • Company incorporated and business bank account open (link to set-up-limited-company-contractor for the full incorporation steps).
  • VAT registration decision made; application submitted if registering voluntarily or if compulsory registration applies.
  • Contract reviewed by a specialist for IR35 before signing. Written terms and working practices assessed together.
  • Professional indemnity and public liability insurance in place and certificates ready to provide to the agency or client.

In the first two weeks

  • Bookkeeping software set up with the business bank account connected and receipt-capture active. First expenses logged immediately.
  • Salary level agreed with your accountant, payroll registered with HMRC, and the first payroll run scheduled. Do not draw personal funds from the company account until this is in place.
  • Pension scheme opened or an existing scheme designated for employer contributions. First employer contribution planned for the first accounting period.

Ongoing from day one

  • Every business expense recorded with a receipt and a note of the business purpose at the time it is incurred.
  • Business mileage logged per journey (date, start, destination, purpose, miles): 55p per mile for the first 10,000 business miles in 2026/27, 25p thereafter.
  • Working-practices file maintained: brief notes on how the engagement actually operates (who sets the hours, whether substitution is practically available, how work is directed), separate from the signed contract.
  • IR35 position reviewed if the working practices or the contract change materially during the engagement.

What happens if the setup is wrong

The consequences of getting these steps wrong are not hypothetical. Income that lands in a personal account creates a loan account that attracts an immediate corporation tax charge if not cleared. A contract that is not reviewed before signing cannot be corrected retrospectively if HMRC challenges the status; tribunals look at the working practices from the start of the engagement. Expenses claimed without receipts are disallowed on enquiry and can trigger penalties as well as the tax. A salary drawn without proper payroll registration attracts interest and potential penalties. A pension not started loses carry-forward years that cannot be recovered.

None of these are catastrophic individually for a single engagement, but they accumulate. Three years of contracting with a correctly structured salary, employer pension contributions taken from the first year, and expenses claimed with contemporaneous receipts produces a materially different financial outcome than the same income managed reactively. The pattern of getting the setup right from the start compounds positively: clean books, a defensible IR35 position backed by a proper contract and working-practices file, a pension that has been receiving employer contributions since the first year, and a salary and dividend split that has been optimised rather than guessed. That is a meaningfully different financial position after three years of contracting.

Getting specialist support

The checklist above sets out what needs to happen. A specialist contractor accountant makes sure the detail is right: the payroll cadence, the salary level given your specific Employment Allowance position, the VAT registration timing, and the pension contribution size in the context of your annual allowance and carry-forward. The services page covers what is included and what to expect from working with a contractor-specialist firm. For a professional review of your contract and working practices before you sign, the IR35 status review service is the starting point.