IR35 Take-Home Pay Calculator
Calculate your take-home pay inside and outside IR35. Compare net income through your limited company if outside IR35 versus as a deemed employee inside IR35.
Last updated: March 2026 — reflects 2025/26 NIC and income tax rates
IR35 Take-Home Pay Calculator 2025/26
Compare outside IR35 (Ltd company), inside IR35 (deemed employment) and umbrella company take-home pay
Understanding Your IR35 Results
2025/26 Tax Rates Used
| Parameter | Outside IR35 (Ltd) | Inside IR35 |
|---|---|---|
| Employer NICs | 15% on salary above £5,000 | 15% deducted from contract value above £5,000 |
| Employee NICs | 8% (£12,570–£50,270), 2% above | 8% (£12,570–£50,270), 2% above |
| Income Tax (basic) | 20% on £12,571–£50,270 | 20% on £12,571–£50,270 |
| Income Tax (higher) | 40% on £50,271–£125,140 | 40% on £50,271–£125,140 |
| Dividend Tax (basic) | 8.75% on dividends in basic band | N/A |
| Dividend Tax (higher) | 33.75% on dividends in higher band | N/A |
| Corporation Tax | 19% (profits ≤£50k) / 25% (profits >£250k) | N/A |
| 5% Expenses Allowance | N/A | Small client only (Chapter 8 IR35) |
IR35 Explained: Off-Payroll Working Rules 2026
What Is IR35 and Who Does It Affect?
IR35 is the shorthand name for the UK's off-payroll working tax legislation, originally introduced in April 2000. The rules are designed to prevent "disguised employment" — where a worker provides services as if they were an employee but routes their income through a personal service company (PSC) to obtain tax advantages. HMRC estimates that without IR35 enforcement, non-compliance costs the Exchequer over £1.7 billion per year.
IR35 affects contractors, consultants and freelancers who work through their own limited company. If HMRC determines that, absent the intermediary company, the worker would be an employee of the client, the engagement is "inside IR35" and the worker must pay broadly the same tax as an employee.
The rules changed significantly for medium and large private sector clients from 6 April 2021, shifting the responsibility for IR35 determination from the worker to the end client (Chapter 10 ITEPA 2003). Previously, only public sector engagements (from April 2017) followed this model. Small private sector clients remain subject to the original rules (Chapter 8 ITEPA 2003), where the PSC determines its own status.
The Three Key Employment Status Tests
Employment status for IR35 is not defined in statute but has been developed through case law. Courts and tribunals apply three primary tests:
1. Mutuality of Obligation (MOO)
Is the client obliged to offer work, and is the worker obliged to accept it? Employment requires both parties to be bound. A contractor with no obligation to accept individual assignments, or a client with no obligation to provide them, points strongly towards self-employment. MOO is the threshold test — without it, no employment relationship exists at all.
2. Control
Does the client control how, when, where and what work is done? Employee indicators include set hours, mandatory attendance, direction on methodology. Self-employment indicators include freedom to determine working methods, set your own schedule, and work from your own premises. The potential for control (even if not exercised) can still indicate employment.
3. Right of Substitution
Can the worker send a suitable substitute without the client's approval? A genuine, unlimited right of substitution is inconsistent with employment. The substitute need not have been used — the contractual right must exist and be real (not a sham clause). The client's right to approve the substitute based on skills is acceptable; the right to refuse for personal reasons undermines the clause.
Beyond the three primary tests, courts examine other factors: financial risk (does the contractor invest in their business?), integration (is the contractor part of the client's organisation?), exclusivity (can they work for multiple clients?), and provision of equipment. No single factor is determinative — status is assessed looking at the "overall picture".
Client-Side Determination and Status Determination Statements (SDS)
Under Chapter 10 ITEPA 2003, medium and large clients must issue a Status Determination Statement (SDS) to the contractor and the fee payer before the engagement begins, or when circumstances change. The SDS must state the determination and give reasons. If the client fails to issue an SDS, or issues one without taking reasonable care, the tax liability reverts to the client.
Contractors who disagree with a determination can raise a formal disagreement with the client within 45 days of receiving the SDS. The client must respond within 45 days with either a new determination or a maintained original with written reasons. Blanket inside-IR35 determinations — where a client applies the same status to all contractors without individual assessment — do not meet the "reasonable care" standard and can be challenged.
The Small Business Exemption
Private sector clients that qualify as "small" under the Companies Act 2006 criteria are exempt from the Chapter 10 off-payroll rules. A company is small if it satisfies at least two of: annual turnover not more than £10.2 million; balance sheet total not more than £5.1 million; no more than 50 employees. For engagements with small clients, the worker's PSC makes its own IR35 determination under the original Chapter 8 rules — and bears the tax risk if that determination is wrong.
Note: from April 2023, unincorporated businesses also have a size threshold based on turnover (£10.2m). Additionally, agencies may be the "fee payer" in a chain — if the agency cannot confirm the client's size, the off-payroll rules apply.
CEST Tool — Benefits and Limitations
HMRC's Check Employment Status for Tax (CEST) tool is available free at tax.service.gov.uk. HMRC will stand behind a CEST result provided: the information entered is accurate and reflects the actual working arrangements; and the tool reaches a determination (it returns "unable to determine" in roughly 20% of cases).
Key criticisms of CEST: it does not explicitly ask about mutuality of obligation; it has been challenged as biased towards inside determinations; and tribunal judges have reached different conclusions than CEST on the same facts. Professional status reviews from specialist tax counsel typically cost £200–£500 for a written opinion and carry greater evidential weight. Organisations such as IPSE (Association of Independent Professionals and the Self-Employed) publish guidance and status review services.
IR35 Status Indicators — Inside vs Outside
| Factor | Points Outside IR35 | Points Inside IR35 |
|---|---|---|
| Substitution | Genuine, unrestricted right to substitute | Personal service required; no substitution right |
| Control | Controls how/where work is done; own methodology | Client dictates hours, location, methods |
| Mutuality | No ongoing obligation to offer/accept work | Guaranteed work; obligation to accept tasks |
| Financial risk | Provides own equipment; can profit or lose | Paid per day/hour; no financial risk |
| Integration | Clearly distinct from employees; project-based | Attends all-hands meetings; staff directory |
| Exclusivity | Works for multiple clients simultaneously | Cannot work for competitors; exclusivity clause |
| Business identity | Owns website, has other clients, trades publicly | Single-client PSC with no independent trading |
Penalties for Non-Compliance
If HMRC opens an IR35 enquiry and determines non-compliance, the consequences are severe. The PSC owes PAYE income tax and NICs on all inside-IR35 income for the relevant years. Interest accrues on unpaid tax from the original due date. Penalties depend on the behaviour:
- Careless inaccuracy: 0–30% of tax unpaid (reduced for disclosure)
- Deliberate inaccuracy: 20–70% (unprompted) or 30–70% (prompted)
- Deliberate and concealed: 30–100% (unprompted) or 50–100% (prompted)
HMRC enquiries can go back six years for careless behaviour and 20 years for deliberate behaviour. The liability falls primarily on the PSC, but HMRC can pursue individuals personally in cases of deliberate non-compliance. Under Chapter 10, if the fee payer fails to deduct correctly, the liability transfers up the chain.
Worked Example: £100,000 Contract Value
Outside IR35 (Ltd Co)
| Contract value | £100,000 |
| Less: Expenses | −£3,000 |
| Less: Salary (£12,570) | −£12,570 |
| Less: Employer NICs on salary | −£1,135 |
| Less: Pension (employer) | −£5,000 |
| Less: Corp. Tax (19% on £78,295) | −£14,876 |
| Dividends available | £63,419 |
| Less: Tax on salary | −£0 |
| Less: Dividend tax (~8.75%) | −£3,303 |
| Net Take-Home | ≈£72,611 |
| Effective rate | ≈27.4% |
Inside IR35
| Contract value | £100,000 |
| Less: Employer NICs (15%) | −£14,250 |
| Less: 5% expenses allowance | −£5,000 |
| Deemed employment income | £80,750 |
| Less: Income Tax (20%/40%) | −£21,964 |
| Less: Employee NICs (8%/2%) | −£5,316 |
| Net Take-Home | ≈£53,470 |
| Effective rate | ≈46.5% |
Appeals Process and Reasonable Excuse
If HMRC issues a determination that you believe is wrong, you can appeal to the First-tier Tribunal (Tax Chamber) within 30 days. The burden of proof rests on the taxpayer to show that the engagement was one of self-employment. Recent tribunal wins include Kaye Adams (2023 Court of Appeal), Gary Lineker (2023 First-tier Tribunal), and various IT contractor cases. Success rates at tribunal for taxpayers increased after HMRC's CEST tool was found deficient in its analysis of mutuality of obligation in the 2021 IR35 Review.
The NHS and many financial services firms adopted blanket inside-IR35 policies from April 2021, leading to widespread contractor departures and subsequent partial reversals. If your client has applied a blanket policy, documenting the individual circumstances of your engagement — and obtaining a professional status review — significantly strengthens any appeal position.
Umbrella Company Considerations
Many contractors working inside IR35 choose to operate through a compliant umbrella company rather than administering their own PAYE. The umbrella employs you, handles PAYE, and pays you a net salary. Your take-home is marginally lower than a direct inside-IR35 calculation by the umbrella's weekly margin (typically £15–£35/week = £780–£1,820/year). Benefits include: statutory employment rights (SSP, maternity/paternity, holiday pay entitlement), simpler administration, and reduced IR35 risk (the umbrella bears compliance responsibility). Always verify the umbrella is on HMRC's list of compliant umbrella companies — mini umbrella schemes and disguised remuneration arrangements remain a major HMRC focus.
Tax Planning Strategies for IR35 Contractors
1. Optimal Salary/Dividend Split (Outside IR35)
Set your salary at exactly the Primary Threshold (£12,570 for 2025/26) — above the personal allowance, so no income tax; below the point where employee NICs apply in full. The company pays employer NICs of 15% on salary above the secondary threshold (£5,000) — on £12,570 that's approximately £1,135/year. All remaining company profit distributed as dividends, which enjoy the £500 dividend allowance tax-free and are taxed at 8.75% (basic) or 33.75% (higher) — far below equivalent income tax + NICs rates.
2. Employer Pension Contributions
Employer pension contributions paid via your limited company are deductible from corporation tax, do not attract employer NICs, and do not count as income for income tax or NICs purposes. Contributing £10,000–£40,000 annually to a SIPP or workplace pension can save both corporation tax (19–25%) and future higher-rate income tax, delivering a combined tax efficiency of over 40–50p per £1 contributed versus taking dividends.
3. Mix Inside and Outside IR35 Contracts
Where possible, maintain a portfolio of both inside and outside IR35 engagements. Your outside-IR35 income through your Ltd company is taxed optimally. Inside-IR35 income can go through an umbrella — keeping your Ltd company's records clean and simplifying your accountant's work. This hybrid approach also demonstrates to HMRC that you have a genuine business rather than a single-client PSC.
4. Retain Funds in the Company
Outside IR35, company profits not immediately needed as personal income can be retained in the company and invested. Retained profits are only taxed at 19–25% corporation tax initially. Funds can be invested in ISA-qualifying products or drawn in future tax years when you may be a basic-rate taxpayer (e.g. during gaps between contracts). This time-shifting of income is perfectly legal and can save significant higher-rate tax.
Sources & Methodology
This calculator uses 2025/26 HMRC income tax bands, NIC thresholds, corporation tax rates and dividend tax rates. Employer NIC figures reflect the October 2024 Autumn Budget changes effective April 2025 (rate 15%, secondary threshold £5,000).
Official References
- HMRC — IR35: find out if it applies
- HMRC — Understanding off-payroll working (IR35)
- HMRC CEST Tool — Check Employment Status for Tax
- ITEPA 2003, Chapter 8 — Intermediaries Legislation
- ITEPA 2003, Chapter 10 — Off-Payroll Working Rules
Disclaimer: This calculator provides estimates for guidance only. Actual tax liability depends on individual circumstances including employment status determination, other income sources, allowances and reliefs claimed. Tax law is complex and subject to change. Always consult a qualified accountant or tax adviser for professional advice on your IR35 position.