How IR35 changes contractor status at a UK appointment-setting agency

What to take away

Off-payroll working rules and who decides status

The off-payroll working rules decide whether a contractor working through an intermediary, usually a personal service company, is taxed like an employee for the work they do. They apply to sales development and appointment-setting engagements where the agency controls how, when and where the work happens.

For medium and large clients, the end client makes the status decision. For small clients, the contractor's own company decides. That split is the first thing to establish before you sign anything.

HMRC is the body that enforces the rules. It looks at the working relationship, not the contract's label. A contract saying self-employed does not settle the question if the day-to-day reality is employment.

Control is the main test. If the agency sets the call scripts, the dialler hours, the CRM discipline and the daily targets, that points towards employed status. If the contractor runs their own diary and takes the commercial risk, it points the other way.

Substitution matters too. A genuine right to send a suitably qualified replacement, without needing permission, is strong evidence of self-employment. A clause that exists on paper but is never used carries little weight.

Financial risk is the third leg. Contractors who quote for a project, carry their own insurance and bear the cost of poor results look more self-employed than those paid a fixed rate for a fixed shift pattern.

The rules apply across the United Kingdom, including Scotland, Wales and Northern Ireland, though some Scottish engagements have their own history of HMRC scrutiny. The region does not change the test.

Before you engage anyone, work out who the end client is, whether they are small, and who pays the contractor's company. Those three facts decide who carries the risk.

The small-company exemption and what it means for agencies

The small-company exemption lets a contractor's own company decide status when the end client is small. If the client is not small, the client decides and issues a status-determination statement.

Small means meeting two of three tests in the client's previous financial year: turnover of no more than £15 million, a balance sheet total of no more than £7.5 million, and no more than 50 employees, after the thresholds rose on 6 April 2025. Companies House filings are the usual starting point for checking.

The exemption is not a loophole. It moves the decision, and the risk, to the contractor. If HMRC later disagrees, the contractor's company faces the tax bill.

Agencies that place sales contractors with small clients should say so in writing. Record the client's size, the date you checked and the source you used. That paper trail matters if HMRC asks questions later.

Watch for connected companies and grouped accounts. A client that looks small on its own may not be small once linked entities are counted. Accountants often catch this; founders often miss it.

If the client is part of a larger group, treat the group as the client for size purposes. That can turn a small-looking engagement into a medium or large one overnight.

The exemption also affects who you invoice and how. Some agencies invoice the contractor's company; others invoice the end client and pay the contractor. Each route has different payroll and VAT consequences.

For an agency building a sales team, the exemption question sits alongside the commercial one. A cost guide helps you compare the total cost of contractor and employed models before you commit.

Using HMRC's CEST tool and reading the result

HMRC CEST tool, the Check Employment Status for Tax service, gives an indicative view of status. It asks about control, substitution, financial risk and the working arrangement.

CEST is free and quick, but it is not a binding ruling. HMRC will stand by a CEST result only if the answers you gave were accurate and complete. Garbage in, garbage out.

The tool has known limits. It handles some questions poorly, particularly around mutuality of obligation and the right of substitution. Many advisers run CEST alongside a manual review, not instead of one.

Save the CEST output. Keep the reference number, the date and the answers. If HMRC later queries the engagement, that record is your first line of defence.

Use CEST before the contract is signed, not after. A result that arrives once the contractor has been working for six months is harder to act on.

If CEST says employed, do not simply ignore it. Either change the working practices so the answer is genuinely self-employed, or move the person onto payroll.

If CEST says self-employed, do not treat that as the end of the matter. The working reality can drift. Review the position when the role changes, the client changes or the contract renews.

Run CEST for each distinct role, not once for the whole agency. A business development contractor working fixed hours is a different case from a freelance closer paid per meeting booked.

Status-determination statements and client communication

Status-determination statements are written decisions from the end client about a contractor's status. Medium and large clients must issue one to the contractor and to any agency in the chain.

The statement must give the reasons for the decision. A one-line letter saying "outside IR35" is not enough. It should reference the tests and the facts relied on.

The client must take reasonable care when making the decision. A careless statement can leave the client liable for the tax that should have been deducted.

Agencies sit in the middle. You may receive the statement and pass it on, but you are not the decision maker unless the client asks you to act for them. Get that delegation in writing.

The contractor has a right to disagree. There is a formal process: the contractor responds with evidence, and the client has 45 days to reply. Agencies should know the clock and keep records.

If the client does not respond, the contractor can take the dispute further. That is a client problem, but it becomes your problem if it stalls the engagement or the invoice.

Keep statements with the contract, the CEST output and the timesheets. A single folder per contractor makes an HMRC enquiry far less painful.

Communication matters as much as paperwork. Tell contractors early what the decision is, why it was made and what happens next. Surprises at invoice stage damage relationships.

When you build an SDR or appointment-setting team, the hiring route and the status route should be decided together. The team roles split in a typical agency shows which roles are usually employed and which are often contracted.

How day rates for self-employed sales contractors are reviewed

Day rates for self-employed sales contractors are reviewed when status changes, when the market moves or when the scope of the role shifts. Status change is the big one: if the engagement moves onto payroll, the rate conversation changes completely.

A contractor inside IR35 receives pay through PAYE. The gross day rate stays the same on paper, but the net figure falls once income tax and National Insurance are deducted. Contractors often ask for a rate rise to compensate.

Employer National Insurance and the apprenticeship levy may also apply. That cost usually lands with the fee payer, which may be the agency. Build it into the margin before you agree the rate.

Market rates vary by region. Greater London and the South East tend to sit above the national average, while the North West, West Midlands, Yorkshire and the Humber and the South West often sit lower. Scotland and the East of England vary by sector.

Role type drives the rate as much as location. A lead-generation caller paid per appointment is priced differently from a senior closer carrying a quota and a pipeline.

Commission structures complicate the comparison. A low day rate with a strong commission might beat a high day rate with none, but only if the pipeline is real. Ask for the conversion data behind the promise.

Review rates at least annually, and whenever the client's status decision changes. Put the review date in the contract so neither side has to raise it.

Agencies comparing models should look at total cost, not headline rate. The costs and pricing article sets out why two quotes for the same role can differ sharply.

Payroll, VAT and contract terms when status changes

When status changes, payroll obligations move. If the contractor is deemed employed for tax, the fee payer must operate PAYE, deduct income tax and National Insurance and report through real time information.

Commission-based sales staff add complexity. Payroll systems must handle variable pay, and the timing of commission payments affects the deductions in each period. The payroll guidance on GOV.UK sets out the reporting duties that apply to variable pay.

VAT treatment can also shift. Sales and marketing services are generally standard-rated at 20 per cent, though some related supplies fall into different categories. The VAT rate tables confirm the current treatment before you invoice.

If the contractor's company was charging VAT and the engagement moves inside IR35, the invoicing route may change. Some agencies continue to pay the company, which then operates PAYE; others pay the individual directly.

Contract terms need to match reality. Remove or rewrite clauses that promise control the agency does not actually exercise, and make sure substitution and notice terms reflect what happens in practice.

Notice periods, confidentiality, data protection and intellectual property should all be reviewed at the same time. A status change is a good moment to tidy the whole agreement.

Agency founders should also check their own obligations as employers. The recruiting and hiring rules on GOV.UK cover right to work checks, contracts and onboarding for anyone you move onto payroll.

Data handling does not change with status. UK GDPR and the Data Protection Act 2018 still apply to prospect data, and PECR still governs cold calls and emails. The Information Commissioner's Office enforces both.

For regulated sales, the Financial Conduct Authority may set additional rules on how products are promoted. That sits on top of tax status, not instead of it.

Advertising claims made by contractors on your behalf still fall under the Advertising Standards Authority's remit. Train contractors on what they can and cannot say.

Professional bodies such as the Chartered Institute of Marketing and the Institute of Sales Professionals publish guidance that can help shape role descriptions. The Office for National Statistics publishes pay data that is useful when benchmarking rates.

A worked example: moving an SDR onto payroll

Suppose an agency in Manchester places a business development contractor with a medium-sized software client. The client issues a status-determination statement saying the role is inside IR35.

Pre-engagement checklist

Common questions

Who decides IR35 status for an appointment-setting contractor?

For medium and large end clients, the client decides and issues a status-determination statement. For small clients, the contractor's own company decides under the small-company exemption.

Is HMRC CEST tool enough to prove status?

No. CEST gives an indicative result and HMRC will stand by it only if the answers were accurate. Keep the output with contracts, timesheets and working-practice evidence.

What happens to the day rate when a contractor moves inside IR35?

The gross rate may stay the same, but net pay falls after income tax and National Insurance. Employer National Insurance and levy may also apply, so the fee payer often revisits the rate.

Do the off-payroll working rules apply across the whole UK?

Yes. The rules apply in England, Scotland, Wales and Northern Ireland. The region does not change the test, though local market rates for sales contractors do vary.

Can an agency be liable if the client gets status wrong?

The client must take reasonable care when deciding. If the client fails to issue a valid statement or gets it wrong carelessly, liability can fall on the client, but agencies in the chain should keep records to protect their position.

Does VAT change when a contractor moves onto payroll?

It can. Sales and marketing services are generally standard-rated, but the invoicing route changes when the contractor is paid through PAYE. Check the current rates and your own registration position before you invoice.

For agency setup, contracts and ongoing obligations, the GOV.UK business hub is the starting point for most founders.