Subcontracting Agreement: Why the Contract Must Match the Reality of the Working Relationship
- William Slivinsky
- 4 days ago
- 7 min read
If your business uses self-employed contractors, subcontractors or flexible labour, a subcontracting agreement is important — but a subcontracting agreement is not enough on its own. I advise business owners on employment-status and worker-status arrangements because the real legal risk is not only what the document says, but how the working relationship operates in practice.
A subcontracting agreement should support your business model, not create a false sense of protection. This point is not just theory. In one of the cases in which I represented the claimant Mr. M. Nowotnik established limb (b) worker status, there was no written contract setting out the full relationship, but the Employment Tribunal still looked at the reality of how the work was carried out. That case shows why labels, pressure, informal arrangements, or missing paperwork do not decide the issue by themselves.
See full judgment: https://assets.publishing.service.gov.uk/media/699adfec9f2f510ba1d0ba23/Mr_M_Nowotnik_v_Cedar_Construction_Services_Limited_2601835.2024_Judgment.pdf
Reality is key.
There is also a wider liability issue. If a subcontractor causes injury, loss or damage while working for your business, the same facts that create employment-status risk may also become relevant to negligence, insurance and business liability. I explain that connected risk in more detail in my article on how worker status can affect business liability in negligence.
This article explains why a subcontracting agreement must be aligned with the way your business actually builds, controls and manages the subcontractor relationship.
What is a subcontracting agreement?
A subcontracting agreement is a contract between a business and another person or business that agrees to carry out part of the work.
For example, your business may use subcontractors for construction work, transport, delivery services, maintenance, cleaning, installation work, customer-facing services, consultancy, repair work, project-based labour or specialist technical work.
A properly drafted subcontracting agreement may cover the scope of work, payment terms, deadlines, standards, insurance, liability, confidentiality, termination, health and safety, and whether the subcontractor can use someone else to perform the work.
Subcontracting can be commercially useful. It gives businesses flexibility and access to specialist skills. But it can also create legal risk if the subcontracting agreement does not reflect the true working relationship.
The two key risks: employment status and liability
When a business uses subcontractors, two major issues often arise.
The first is employment status.
A person described as a subcontractor may still argue that they were actually a worker or employee.
The second is liability.
If the subcontractor causes injury, loss or damage while carrying out work for the business, the business may face questions about control, supervision, insurance and responsibility.
These two issues are not the same, but they often pull in the same direction. If the business controls the subcontractor closely, prevents genuine substitution, provides equipment, manages the customer relationship and treats the person like part of the workforce, that may create both employment-status risk and wider liability risk.
That is why a subcontracting agreement should never be treated as a paper shield. It must be part of a properly structured working relationship.
The problem with paper-only protection
A subcontracting agreement may say that the subcontractor is self-employed, CIS registered and controls their own work and taxes, can send a substitute, has their own insurance and accepts business risk.
Those clauses are useful only if they match reality.
A substitution clause may not help if the subcontractor was never allowed to send anyone else. A clause saying the subcontractor controls the work may not help if the business gives daily instructions. A clause saying the subcontractor is independent may not help if they wear the business uniform, use business equipment and work only for that business.
The key question is not only:
“What does the subcontracting agreement say?”
The better question is:
“Does the subcontracting agreement match the reality of the working relationship?”
Why reality matters more than the label
A business cannot safely rely on the word “subcontractor” if the practical arrangement says something different.
The legal risk increases where the business:
gives daily instructions;
controls how the work is done;
controls when and where the work is done;
prevents genuine substitution;
requires personal attendance;
provides the tools, vehicle or equipment;
manages the customer relationship;
sets the price;
requires branded clothing or vehicles;
prevents the subcontractor from working for others;
treats the subcontractor like a member of staff.
In those circumstances, the written subcontracting agreement may not reflect the reality of the relationship. That can create problems if there is an Employment Tribunal claim, a customer complaint, an accident, an insurance dispute or a negligence claim.
Control is often the central issue
Control is one of the most important practical issues in subcontractor relationships.
A business owner should ask:
who decides how the work is done;
who decides when and where the work is done;
who provides instructions;
who supervises the work;
whether the subcontractor can refuse work;
whether the subcontractor can negotiate price;
whether the subcontractor can work for others;
whether the subcontractor can send someone else;
whether the subcontractor carries real business risk.
The more control the business exercises, the greater the risk that the relationship does not look like genuine independent subcontracting.
Control is not always avoidable. Your business may need to control quality, safety and customer standards. But if your business controls the work closely, the subcontracting agreement should be drafted around that reality, and the legal risk should be managed properly.
Personal service and substitution
Another key issue is whether the subcontractor must perform the work personally.
A genuine right of substitution can support independent contractor status. But substitution must be real. It may be weak if the subcontractor is expected to attend personally, if the business would reject any substitute in practice, or if the clause exists only on paper.
This is one of the common problems with standard subcontracting agreement templates. They may include a substitution clause, but the business may have no real intention of allowing substitution in practice.
If the clause does not reflect reality, it may not provide the protection the business expects.
Integration into the business
A subcontractor may look less independent if they wear the business uniform, use business equipment, appear on staff rotas, report to managers, use company vehicles, represent the business to customers or follow internal procedures in the same way as employees.
Some integration may be commercially necessary, especially in customer-facing work. But the business should understand the risk.
If the subcontractor looks like part of the business, acts like part of the business and is managed like part of the business, the written label may not be enough.
Liability risk
Employment-status risk is not the only issue. Liability also matters.
If a subcontractor causes injury, property damage or customer loss while carrying out work, the business may face difficult questions.
For example:
Was the subcontractor genuinely independent?
Did the business control the work?
Did the business create or increase the risk?
Did the business provide instructions or equipment?
Was the subcontractor properly trained or competent?
Was the work properly supervised?
Did the business have appropriate insurance?
Did the working relationship match the insurance assumptions?
This is why employment-status risk and liability risk should be considered together. The legal tests may differ, but the factual picture often overlaps.
A subcontracting agreement should therefore deal not only with employment-status wording, but also with liability, insurance, indemnity, standards, responsibility and practical risk management.
What a subcontracting agreement should cover
A properly drafted subcontracting agreement should usually address:
the parties;
the scope of work;
payment terms;
standards and deadlines;
tax responsibility;
insurance requirements;
liability and indemnity;
health and safety;
confidentiality;
data protection, where relevant;
equipment and materials;
ability to work for others;
genuine substitution, where appropriate;
termination;
dispute resolution;
governing law.
However, these clauses should not be drafted in isolation. They should be based on how the relationship will actually work.
A subcontracting agreement should not pretend that the subcontractor is fully independent if your business will control the work in practice.
Insurance and indemnity
Insurance is often overlooked.
A subcontracting agreement may say that the subcontractor must have insurance, but your business should check whether the insurance exists and whether it is adequate.
Depending on the work, this may include public liability insurance, professional indemnity insurance, employer’s liability insurance, motor insurance or specialist industry cover.
Indemnity clauses can also help, but they are not a complete solution. An indemnity may be difficult to enforce if the subcontractor has no funds or no insurance.
Insurance and indemnity should support proper risk management. They should not replace it.
Practical example
A business uses a subcontractor for delivery work. The subcontracting agreement says the subcontractor is self-employed and controls how the work is done.
In practice, the business gives daily instructions, controls delivery routes, sets delivery times, requires branded clothing, deals with customers, sets the price and does not allow the subcontractor to send anyone else.
If a dispute arises, the business may struggle to rely only on the written subcontracting agreement. The working reality may suggest that the subcontractor was integrated into the business and subject to significant control.
If the subcontractor later brings an Employment Tribunal claim, the business may face a worker-status dispute. If the subcontractor causes injury or damage while working, the same facts may also raise questions about responsibility, supervision, insurance and liability.
This is why the document and the reality must work together.
Practical steps for business owners
Before using subcontractors, your business should:
decide whether the relationship is genuinely independent;
make sure the subcontracting agreement reflects the reality;
review how much control the business will exercise;
check whether substitution is genuine;
check insurance before work starts;
keep records of agreements, instructions and insurance;
review the arrangement regularly;
take advice before a dispute or accident occurs.
Relationships often change over time. A subcontractor who starts as independent may gradually become integrated into the business. That is why regular review matters.
Conclusion
A subcontracting agreement is important, but it is not enough by itself.
The subcontracting agreement must be aligned with the reality of the working relationship. If the business controls the subcontractor like a member of staff, prevents genuine substitution, integrates the person into the business and manages the customer relationship, the written label may not protect the business.
The two key risks are employment-status disputes and liability. One can pull the other because both may depend on the same factual picture: control, integration, personal service, independence, insurance and responsibility.
Good drafting matters. But drafting must be supported by reality. The safest approach is to build the subcontractor relationship properly from the beginning, so the contract, insurance, working practices and day-to-day management all point in the same direction.
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