Why the umbrella-to-PSC question comes up
Umbrella companies are the default structure for contractors in the early stages of a career, for those placed on inside-IR35 engagements, and for anyone who values administrative simplicity over tax efficiency. The umbrella employs you, operates PAYE and NIC on your assignment income, pays you a net salary, and handles all the filing. There is no company to run.
The full comparison of structures is covered in our guide to limited company vs umbrella for contractors. This page focuses on a narrower question: what changes in your situation that makes the switch worth doing, what the practical process looks like, and when staying put is the right answer.
The principle that governs the decision
The firm position here (which we hold consistently across all advice we give) is that the structure follows the work. A personal service company (PSC) is not inherently superior. For a contractor on a genuinely inside-IR35 engagement, umbrella is often the simpler and more economic route: the fee-payer deducts PAYE and NIC before paying the PSC anyway, so the income arrives in the company having already been taxed, and the PSC running costs (accounting, filing, admin) represent a net cost with no tax gain. What drives the switch is the nature of the contracts you hold or expect to hold.
Our consistent position is simple: the inside/outside IR35 mix drives the answer. Do not switch because "everyone says limited is better". Switch when your work mix creates a genuine financial case for it.
Trigger one: you have landed an outside-IR35 contract
The clearest signal is a contract where the end client has assessed the engagement as outside IR35 (or where you are working with a small client and have self-assessed as outside under Chapter 8 of ITEPA 2003). Outside IR35 means the fee-payer pays the PSC the full contract fee without deducting PAYE or NIC. The money arrives in the company gross, and you decide how to extract it.
That extraction flexibility is where the PSC advantage lives. A typical 2026/27 structure for a single-director company without other employees sets salary at the lower earnings limit of £6,708 per year. This is above the secondary threshold of £5,000, so a small employer NIC charge arises: 15% on the £1,708 difference, roughly £256 a year. That is the accepted price of a qualifying NI year for state pension purposes. Above the salary, remaining profits are extracted as dividends.
Dividends are taxed at the dividend ordinary rate of 10.75% (2026/27, from Finance Act 2026 s.4) within the basic-rate band, rather than at 20% or 40% income tax, and carry no employee or employer NIC. The £500 dividend allowance (2026/27) covers the first £500 of dividend income before any tax applies. The company pays corporation tax on its profits before distribution: 19% on profits up to £50,000 (2026/27), which is the range most contractors operate in. Together, the salary-plus-dividend structure produces materially more take-home than the same gross income processed through PAYE, once you account for the absence of employer NIC on dividends and the lower dividend rate.
None of this is available through an umbrella, where all assignment income passes through PAYE. The outside-IR35 contract is the point at which the tax arithmetic changes.
Trigger two: you are working for multiple clients
A contractor with two or three concurrent clients, where at least one engagement is outside IR35, has a practical as well as a tax reason to incorporate. An umbrella assigns you an employment for each engagement; you receive separate payslips and the administrative overhead multiplies. A PSC is a single legal entity that contracts with all clients simultaneously, invoices each one, and manages all the income through a single set of accounts.
Where one contract is outside IR35 and another is inside, the PSC handles both. Outside-IR35 income arrives gross in the company. Inside-IR35 income under Chapter 10 (applicable where the client is medium or large) arrives having had PAYE and NIC deducted by the fee-payer; the company receives the net amount and tracks it separately to avoid a second charge. The director extracts the outside-IR35 profits tax-efficiently through the salary-dividend structure, while the inside-IR35 net receipts are available for drawings without further personal tax (the tax has already been paid upstream).
The PSC structure therefore gives you a single vehicle for mixed-status work, which umbrella cannot replicate cleanly.
Trigger three: retained profits and pension goals
An umbrella cannot retain profits between assignments. Every payment is processed as salary in the period it is earned; there is no company balance sheet holding reserves. A PSC, by contrast, can leave profits inside the company after paying corporation tax, building up a retained reserve that sits ready for a quiet period, a lump-sum pension contribution, or eventual distribution on a planned timeline.
The pension point deserves emphasis. A PSC can make employer pension contributions directly from the company to a registered pension scheme. Those contributions are deductible against corporation tax, carry no employer or employee NIC, and are not taxed on the director when paid in. The annual allowance in 2026/27 is £60,000 across all contributions (employer plus personal). Critically, the employer contribution from a PSC is not limited by the director's salary level (only by the annual allowance and the wholly-and-exclusively test); this is the key difference from a personal contribution, which is capped at 100% of relevant UK earnings and where earnings means salary, not dividends.
A contractor earning £120,000 a year through a PSC could, in a high-profit year, make a pension contribution of up to £60,000 from the company (more, with carry-forward of unused allowances from the previous three years, up to £180,000 in a single year if the prior years were unused). That same contractor through umbrella is limited to what the umbrella workplace scheme allows under the auto-enrolment rules, which is a fraction of that sum.
With an eye on long-term wealth building, the pension difference alone can justify incorporation even before counting the salary-dividend efficiency. Our guide on employer pension contributions from a PSC covers the mechanics in full.
When staying umbrella is right
The switch is not always the answer. Consider staying umbrella in these situations.
Your work is entirely inside IR35. If every engagement you hold has been assessed as inside IR35 (and you have no realistic prospect of an outside determination), a PSC gives you nothing on the tax side. The fee-payer deducts PAYE and NIC before the PSC sees the money. You still pay accounting fees, file corporation tax returns, and run PAYE from inside the company. The net effect is cost with no benefit.
You are between contracts or contracting is a short-term plan. Incorporating a company and then closing it within one or two years is administrative overhead for a modest gain. The company still needs annual accounts, a corporation tax return, and a final Companies House closure filing (either a strike-off or, for larger reserves, a Members' Voluntary Liquidation). If you anticipate returning to employment or stopping contracting within 12 months, umbrella is cleaner to wind down.
You value simplicity above all. An umbrella payslip is one document. A PSC director manages PAYE, corporation tax, VAT (if registered), Companies House filings, self-assessment, and the ongoing IR35 position for each engagement. A good contractor accountant handles most of this, but you still need to engage with it. That ongoing engagement is not for everyone.
You are on a short engagement with a non-negotiable inside-IR35 determination. For a three-month contract where the client has issued a blanket inside-IR35 SDS (even if questionable), the practical cost of incorporating, running the PSC, and then either keeping it dormant or closing it outweighs any benefit. Use umbrella for the contract, challenge the SDS through the 45-day disagreement process if you believe it is wrong, and incorporate when you win the next outside-IR35 role.
What changes financially when you switch
The table below compares the two structures on a typical 2026/27 outside-IR35 day rate of £500 (roughly £120,000 annualised).
| Item | Umbrella (all income through PAYE) | PSC outside IR35 (salary £6,708 + dividends) |
|---|---|---|
| Gross assignment rate | £120,000 | £120,000 into the company |
| Employer NIC (15% above £5,000) | Deducted from assignment rate: approx. £17,250 | On salary only: approx. £256 (on £6,708) |
| Apprenticeship Levy + umbrella margin | Deducted from assignment rate: typically £1,000 to £2,500 | Not applicable |
| Corporation tax (19% on profits up to £50,000) | Not applicable | Approx. £22,750 on £100,000 net profit (25% less marginal relief; 19% applies only up to £50,000) |
| Income tax on salary | 20%/40% on gross minus NIC and allowances | Minimal (salary below personal allowance area) |
| Dividend tax (2026/27) | Not applicable | 10.75% on basic-rate dividends; 35.75% above £50,270 |
| Employee NIC (8% PT to UEL) | On full gross employment income | On salary only (minimal) |
The actual net gain varies significantly with earnings level, the director's other income, whether the company can claim the Employment Allowance (it cannot if the sole director is the only employee), and pension contributions taken. Model your specific position with a contractor accountant rather than relying on illustrative comparisons.
The practical steps
Moving from umbrella to PSC is a defined process. These are the steps in order.
Step 1: confirm the IR35 status of the new contract
Before you incorporate, confirm that the contract you are switching for is genuinely outside IR35. If the client is medium or large, they issue a Status Determination Statement under ITEPA 2003 Chapter 10. Verify the SDS, check that the working practices match the contract (working practices govern, not the wording alone), and consider a professional contract review. Incorporating for a contract that turns out to be inside IR35 means the PSC running costs come with no tax benefit. Our guide to protecting outside-IR35 status covers what to check before you start.
Step 2: incorporate the company
File an application at Companies House online, typically with a same-day or next-day turnaround. You will need a company name, a registered office address, details of the director and any shareholders, and a memorandum and articles of association (the standard model articles are adequate for most single-director PSCs). The incorporation fee is modest. Many contractor accountants handle this as part of onboarding. The slug for the full setup walkthrough is our wave-2 guide to setting up a limited company for contracting, which covers Companies House mechanics, share structure and registered office choices in detail.
Step 3: register for PAYE as an employer
Even if you pay yourself a modest salary at or below the LEL, you need an employer PAYE scheme registered with HMRC before you process any payroll. Register online via HMRC's employer registration service; allow up to a week for the PAYE reference to be issued. You will need this before running your first payroll.
Step 4: open a business bank account
The company needs its own bank account; mixing personal and company funds creates accounting complications and is not compliant with Companies House expectations for a separate legal entity. Several challenger banks offer contractor-friendly business accounts with fast onboarding; some traditional banks take two to three weeks. Start this process in parallel with the PAYE registration, not after.
Step 5: register for VAT if appropriate
VAT registration is compulsory once taxable turnover exceeds £90,000 in a rolling 12 months. Many contractors register voluntarily from the start, because the end clients are typically VAT-registered and can recover the VAT you charge, and voluntary registration lets you reclaim input VAT on business expenses. Registration currently takes four to six weeks but you can invoice and operate before confirmation arrives. Note that for a labour-only contractor, the Flat Rate Scheme is rarely beneficial: most fall into the 16.5% limited-cost-trader rate, which wipes out the FRS advantage. Standard VAT accounting is usually the right default.
Step 6: notify the umbrella and receive your final pay
Give the umbrella the notice required under your contract, typically one to four weeks. Request written confirmation of any accrued holiday pay: a compliant umbrella must pay this and cannot retain it. Receive your final payslip and keep it for self-assessment purposes. The umbrella employment ends on your last assignment day; the PSC begins trading from the start of the new contract.
Step 7: engage a specialist contractor accountant
Running a PSC without a specialist accountant is possible but carries real risk: the IR35 position must be managed per-engagement, the salary-dividend split optimised each year, VAT returns filed quarterly, and corporation tax planned against the accounting period. A contractor accountant who works exclusively with PSC directors will handle the compliance, flag IR35 risks, and advise on pension contributions and other planning levers. Our guide to how to choose a contractor accountant covers what to look for in a specialist firm.
The umbrella JSL change from April 2026: context for the decision
From 6 April 2026, Finance Act 2026 s.24 introduced a new joint and several liability (JSL) regime for umbrella PAYE (new ITEPA 2003 Chapter 11, ss.61Y to 61Z2). Where a worker is placed through an umbrella, the recruitment agency (or the end client where there is no agency) is now jointly and severally liable with the umbrella for any PAYE and NIC the umbrella fails to remit. The umbrella remains the legal employer; the reform extends HMRC's enforcement reach to the agency and end client as a deterrent against the non-compliant end of the umbrella market.
This change does not make umbrella structurally riskier for workers on compliant arrangements. What it means in practice is that agencies are imposing tighter preferred-supplier lists, so the market is moving towards accredited umbrellas (FCSA or Professional Passport members) and away from the non-compliant fringes. If you are deciding between umbrella and PSC purely on the basis of the April 2026 change, it does not change the underlying analysis: the structure still follows the IR35 status of the work.
IR35 risk does not disappear inside a PSC
One misconception worth addressing directly: incorporating does not put you outside IR35. The IR35 rules (Chapter 8 and Chapter 10 of ITEPA 2003) apply to personal service companies. For each engagement, the IR35 position must be assessed (by the client, for medium and large clients under Chapter 10; by the PSC itself, for small-client engagements under Chapter 8). If an engagement is inside IR35, the fee-payer deducts PAYE and NIC before paying the PSC, exactly as it would if you were on umbrella. The PSC wrapper does not convert an inside determination into an outside one.
The tax advantage of a PSC is real and significant for outside-IR35 work. It requires ongoing attention to working practices, contract terms and status documentation to protect. Our guide on protecting outside-IR35 status sets out what that looks like in practice.
A worked example: the trigger point in practice
Consider a contractor who has been on umbrella for two years on an inside-IR35 engagement at a large bank. The engagement ends and they secure a new contract with a medium-sized technology firm that assesses the role as outside IR35 under Chapter 10 (and issues a valid SDS). The contractor is now a candidate for incorporation.
The technology firm pays £600 a day. Over a six-month engagement that is roughly £69,000 in contract income. Through umbrella, after employer NIC of approximately £9,825 (15% on roughly £65,500 above the £5,000 secondary threshold, adjusted for the period), Apprenticeship Levy and umbrella margin, the contractor might receive a net salary of around £46,000 to £48,000 before income tax and employee NIC. Through a PSC, the £69,000 arrives gross in the company. After a modest salary of £6,708 (employer NIC cost approximately £256) and corporation tax at 19% on the remaining profit, the extractable sum via dividends is substantially larger, with dividend tax at 10.75% on the basic-rate portion rather than 20% or 40% income tax on employment income.
The actual saving depends on the full income picture, but for a contractor in the basic-rate band the PSC advantage on a single six-month outside-IR35 contract at £600/day is typically in the range of £8,000 to £14,000 after all taxes and accounting fees. That is the order of magnitude that makes the administrative overhead of a PSC worthwhile. For a contractor below £300/day on an outside-IR35 engagement, the numbers are tighter and worth modelling carefully before committing.
Getting the decision right
The move from umbrella to limited company is straightforward mechanically but needs to be timed correctly. The right moment is when you have a confirmed outside-IR35 contract (or a realistic expectation of one), when the day rate makes the PSC economics work after fees, or when pension contributions or retained-profit goals are a meaningful part of your financial plan.
If you are weighing up the switch and want to model the numbers for your specific situation, our contractor accounting service includes an incorporation review and IR35 position assessment as part of onboarding. We work exclusively with UK contractors and PSC directors.