What is the deemed payment calculation under IR35?
Answered 11 March 2026
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IR35 Deemed Payment Calculation
What the law says
The deemed employment payment calculation is set out in section 54(1) ITEPA 2003 (for small clients) and proceeds through the following steps:
| Step | Action |
|---|---|
| Step 1 | Find the total amount of all payments and benefits received by the intermediary in the year in respect of the relevant engagements, and reduce that amount by 5% (the flat-rate expenses allowance). |
| Step 2 | Add any payments and benefits received by the worker directly from the client (not via the intermediary) that are not already chargeable to income tax as employment income, but would be if the worker were employed by the client. |
| Step 3 | Deduct expenses met in the year by the intermediary that would have been deductible from taxable earnings if the worker had been employed by the client and had met the expenses personally (applying Chapters 1–5 of Part 5 ITEPA 2003). If the result at this or any later step is nil or negative, there is no deemed employment payment. |
| Step 4 | Deduct any capital allowances in respect of expenditure incurred by the intermediary that could have been deducted from employment income under s.262 CAA 2001 if the worker had been employed by the client. |
| Step 5 | Deduct any contributions made in the year for the benefit of the worker by the intermediary to a registered pension scheme that, if made by an employer, would not be chargeable to income tax as income of the employee. (Excess contributions later repaid are excluded.) |
| Step 6 | Deduct the amount of any employer's National Insurance contributions paid by the intermediary for the year in respect of the worker. |
| Step 7 | Deduct any payments and benefits received in the year by the worker from the intermediary that are chargeable to income tax as employment income and do not represent items already deducted at Step 3. |
| Step 8 | Assume the result of Step 7 represents an amount together with employer's NICs on it, and deduct what (on that assumption) would be the amount of those employer's NICs. The result is the deemed employment payment. |
Additional statutory rules:
- CIS deductions: Where the construction industry sub-contractor rules apply (s.61 Finance Act 2004), the intermediary is treated as receiving the gross amount (before any CIS deduction) for the purposes of Step 1.
- Mileage allowance relief: Step 3 deductible expenses include mileage allowance relief the worker would have been entitled to had they been employed by the client.
- Income basis: The income brought into account at Steps 1 and 2 is based on amounts received in the tax year — the definition of "received" is narrower than the normal employment income rules, so invoiced-but-unpaid amounts are excluded.
- Tax relief for the intermediary: A deduction is allowed for the amount of the deemed employment payment and any employer's NICs paid on it, in calculating the intermediary's trading profits (ITTOIA 2005 s.163/164; CTA 2009 s.139/140).
HMRC guidance / practice
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Nature of the deemed payment: When IR35 applies, the income of the intermediary is the starting point for calculating the worker's earnings. The intermediary is treated as making a deemed employment payment to the worker, which is chargeable to income tax as employment income and subject to Class 1 NICs, giving rise to an obligation to account for PAYE.
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VAT and the flat rate scheme: The amount included at Step 1 is the VAT-exclusive amount, whether or not the intermediary is within the VAT flat rate scheme. Irrecoverable VAT on allowable expenses is deductible as part of those expenses.
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CIS and ESC C32: Where CIS deductions exceed the corporation tax payable, ESC C32 allows a company to request a set-off of the CIS repayment against the tax and NICs due on the deemed payment, using 19 April as the effective date of payment for the set-off.
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Timing — calculated after year end: The deemed employment payment is calculated after the end of the tax year. Where there is an overlap with Part 7A (disguised remuneration) income, the intermediary must make the best estimate of the Part 7A income as reduced by IR35 during the year; any inaccuracy is corrected through the worker's personal tax return.
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Priority of legislation: IR35 is only considered after the agency legislation and managed service company legislation have been applied and found not to apply.
Citation sources
Part 3 Trading income Chapter 9 Trade profits: other specific trades Intermediaries treated as making employment payments Deduction for deemed employment payment 139 1 This section applies for the purpose of calculating the profits of a trade carried on by an intermediary which is treated as making a deemed employment payment in connection with the trade. 2 A deduction is allowed for— a the amount of the deemed employment payment, and b the amount of any employer's national insurance contributio
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Paragraph 8 Schedule 12 Finance Act 2000/Section 54(2) ITEPA 2003 Regulation 7(2) SI 2000 No. 727 Section 559 ICTA 1988 Section 559 ICTA 1988 concerns payments within the construction industry between contractors and sub-contractors. Where this section applies and the intermediary is treated as a sub-contractor within the construction industry, then payments may be made to it by the client under deduction of tax. In such cases, the deemed payment calculation is based upon the full amount of the
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Part 2 Employment income: charge to tax Chapter 8 Workers' services provided through intermediaries to small clients The deemed employment payment Calculation of deemed employment payment 54 1 The amount of the deemed employment payment for a tax year (“ the year ”) is the amount resulting from the following steps— Step 1 Find (applying section 55) the total amount of all payments and benefits received by the intermediary in the year in respect of the relevant engagements, and reduce that amount
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vehicle falling within subsection (5) if— a the worker had been employed by the client, and b the vehicle had not been a company vehicle (within the meaning of Chapter 2 of Part 4). 5 A vehicle falls within this subsection if— a it is provided by the intermediary for the worker, or b where the intermediary is a partnership and the worker is a member of the partnership, it is provided by the worker for the purposes of the business of the partnership. 6 Where, on the assumptions mentioned in parag