For many professionals, contracting offers an attractive alternative to permanent employment. Higher earning potential, greater flexibility and the freedom to choose the projects you work on can make it an exciting career move.
But contracting also comes with additional responsibilities. Your income may be less predictable, you’ll need to understand how you’re being engaged and paid, and you may have to take greater responsibility for tax, pensions, insurance and planning for periods when you’re not working. Before making the switch, it’s important to understand both sides.
In this guide, we’ll explore the advantages and disadvantages of contracting in the UK, including pay, flexibility, IR35, umbrella companies, limited companies, pensions, benefits and financial planning.
Why do people become contractors?
One of the biggest attractions of contracting is control. Rather than following a traditional career path with one employer, contractors can move between organisations and projects, developing specialist experience while potentially commanding higher rates.
For some people, contracting is about earning more. For others, it’s about escaping the routine of permanent employment, working with different businesses or creating more flexibility around their personal lives.
Whatever your motivation, contracting is more than simply changing how you get paid. You need to think differently about your career. Contracts end. Clients change. Projects get cancelled. There may be periods when you’re not earning.
You’ll also need to understand the financial and administrative side of working independently. For the right person, however, those additional responsibilities can be outweighed by the freedom contracting provides.
What are the benefits of contracting?
The benefits of contracting include:
- Greater control over your career
- Higher earning potential
- More flexibility
- Build specialist skills faster
- Work with different businesses and industries
- Build a powerful professional network
- Less involvement in office politics
Greater control over your career
One of the biggest advantages of contracting is having more control over the work you accept.
As a contractor, you can potentially choose:
- Which projects you work on
- Which clients you work with
- The industries you specialise in
- The locations you’re prepared to work from
- Whether you prefer remote, hybrid or on-site assignments
- When you want to take time between contracts
You’re no longer necessarily waiting for an employer to decide what your next project, promotion or responsibility should be. Instead, you can actively shape your career around the experience you want to develop. That independence is one of the main reasons experienced professionals move into contracting.
Higher earning potential
Contractors can often command higher headline rates than employees performing comparable roles. There’s a reason for that. Businesses frequently hire contractors because they need specialist expertise, additional capacity or someone capable of delivering a particular project within a defined period.
At the same time, contractors may not receive the same package of benefits or long-term security as permanent employees. The rate therefore needs to reflect more than the equivalent permanent salary.
When deciding whether a contract rate is attractive, consider factors such as:
- Paid and unpaid time off
- Pension arrangements
- Insurance
- Accountancy or umbrella fees
- Travel and other costs
- Time between assignments
- Tax treatment
- IR35 status
- The possibility of the contract ending early
A £500-per-day contract, for example, shouldn’t automatically be compared with a permanent salary simply by multiplying £500 by the number of working days in a year. Your headline contract rate and actual disposable income are two very different figures.
More flexibility
Contracting can give you significantly greater flexibility over how you structure your working life. You might choose to work intensively for several months before taking an extended break. Alternatively, you may prioritise remote contracts, shorter assignments or projects that fit around other commitments.
Of course, the amount of flexibility available will depend on the individual contract and client’s requirements. But compared with a traditional permanent career, contractors can often exercise much greater control over which opportunities they accept. Sometimes the most valuable benefit of contracting isn’t earning more – it’s having greater control over your time.
Build specialist skills faster
Permanent employees often develop their skills according to the needs of their employer. Contractors can take a more deliberate approach. You can target assignments involving particular technologies, industries, methodologies or business challenges and gradually build a highly specialised CV.
For example, a technology contractor might deliberately move between projects involving cloud migrations, cybersecurity, data engineering or AI rather than remaining in a broader internal IT position. That specialist knowledge can increase your market value.
The more difficult your expertise is to find — and the more commercially valuable it is — the stronger your position can become when negotiating future contract rates.
Work with different businesses and industries
Contracting exposes you to different organisations, working environments and business problems.
Over several years, you might work with:
- Start-ups
- SMEs
- Large corporations
- Government departments across councils and local authorities
- Financial institutions
- Technology businesses
- Consultancies
- International organisations
That variety can make contracting particularly attractive if you become restless doing the same job for the same organisation for several years. It can also strengthen your CV. Instead of understanding how one organisation operates, you gain experience of multiple businesses, systems and ways of working.
Build a powerful professional network
Every new assignment introduces you to new people. You’ll meet hiring managers, recruiters, project managers, fellow contractors, suppliers and professionals across different organisations. Over time, that network can become extremely valuable.
A contractor who consistently delivers good work may find future opportunities coming through previous clients, colleagues and recruiters rather than relying entirely on job boards. Your reputation becomes part of your business. That’s why successful contracting isn’t only about technical ability. Being reliable, professional and easy to work with can have a direct impact on your future pipeline.
Less involvement in office politics
Contractors are usually brought into organisations to achieve something specific. That can mean less involvement in some of the internal politics that come with permanent employment.
You’re generally there to deliver a project, provide specialist expertise or solve a particular problem. You still need to build good relationships and work effectively with the client’s team, but you may have less involvement in areas such as internal promotion structures or long-term departmental politics. For contractors who prefer to focus on delivery, this can be a significant advantage.
What are the challenges of contracting?
Contracting has plenty of benefits, but it isn’t suitable for everyone. Before leaving permanent employment, it’s equally important to understand the disadvantages.
These include:
- Your income can be less predictable
- You’ll need to understand IR35
- You may need to run a limited company
- Umbrella employment can be simpler but you’ll need to understand the numbers
- You won’t always receive the same benefits as permanent employees
- You’ll need to think about your pension
- Contracting can sometimes feel isolating
- You’re responsible for your career development
Your income can be less predictable
The biggest difference between permanent employment and contracting is financial certainty. A permanent employee generally knows when their next salary payment is arriving. A contractor has to think further ahead.
Your contract might:
- Come to its scheduled end
- Not be renewed
- Be terminated early
- Be affected by budget changes
- Be delayed before starting
You could also spend several weeks or months searching for your next assignment. This is why experienced contractors often maintain a financial buffer rather than assuming they’ll work continuously throughout the year.
If you’re considering contracting, ask yourself: Could I comfortably cover my expenses if I didn’t have a contract for three months? If the answer is no, building savings before making the move may be sensible.
You’ll need to understand IR35
If you’re contracting through your own limited company, one of the most important areas to understand is IR35, also known as the off-payroll working rules. Broadly, IR35 considers whether you would effectively be regarded as an employee for tax purposes if your intermediary wasn’t sitting between you and the client.
Contracts are commonly described as:
- Inside IR35 – where the engagement is treated as employment for tax purposes under the relevant off-payroll rules.
- Outside IR35 – where the engagement is considered genuinely self-employed for tax purposes.
IR35 can have a significant impact on how you’re paid and the amount you ultimately take home. It’s therefore important to understand the IR35 position of an assignment before comparing its rate with other opportunities.
You may need to run a limited company
For appropriate outside-IR35 engagements, some contractors provide their services through their own Personal Service Company (PSC). Operating a limited company comes with responsibilities.
Depending on your circumstances, these can include:
- Maintaining company records
- Raising invoices
- Keeping financial records
- Managing business expenses
- Filing accounts
- Meeting tax obligations
- Managing company banking
- Maintaining appropriate insurance
Many contractors employ an accountant to help manage these responsibilities, but you still need to understand the basics of how your company operates. You’re effectively running a small business. For some contractors, that’s part of the attraction. For others, it’s unnecessary administration they’d rather avoid.
Umbrella employment can be simpler but you’ll need to understand the numbers
Another common way of working is through an umbrella company. Under this arrangement, the umbrella company normally employs you and pays your salary through PAYE.
Income Tax and employee National Insurance are deducted through payroll, making the administrative side of contracting considerably simpler. However, it’s important to understand the difference between the assignment rate paid to the umbrella company and your gross taxable salary.
The assignment rate may need to cover employment costs and the umbrella company’s margin before your gross salary is calculated. So if you’re comparing an umbrella contract with a permanent salary or an outside-IR35 contract, don’t compare headline rates alone. Ask for a clear illustration showing how the assignment rate translates into expected take-home pay.
You won’t always receive the same benefits as permanent employees
Permanent employment can come with a valuable benefits package. Depending on the employer, this might include:
- Paid annual leave
- Sick pay
- Employer pension contributions
- Private healthcare
- Life insurance
- Bonuses
- Enhanced parental benefits
- Training budgets
- Other workplace benefits
Independent contractors don’t necessarily receive the same package. If you’re operating through your own limited company, you’ll need to consider how you’ll fund benefits and periods when you’re not working.
Umbrella employees have employment rights and statutory entitlements through their umbrella employer, but it’s still important to understand exactly how holiday pay, pension contributions and other deductions operate.
When comparing permanent employment with contracting, always compare the whole financial package, not simply salary versus day rate.
You’ll need to think about your pension
Pensions can easily become an afterthought when someone first moves into contracting. That can be a costly mistake. Permanent employees often benefit from workplace pension contributions without giving them much thought.
Once you become a contractor, you may need to take a more active role in planning for retirement. Exactly how your pension works will depend on whether you’re operating through your own company, an umbrella company or another PAYE arrangement. Whatever your setup, pension planning should form part of your wider financial strategy rather than being something you intend to “sort out later”.
Contracting can sometimes feel isolating
Not everyone enjoys moving between organisations. Permanent employees often develop long-term friendships and a strong sense of belonging within their team. Contractors can have a different experience.
You may join a project, work intensively with a team for six months and then move to another organisation. For some people, that’s refreshing and for others, it can feel isolating. This is another reason building a professional network outside individual assignments can be valuable.
You’re responsible for your career development
As a permanent employee, your employer may provide:
- Training programmes
- Professional qualifications
- Development plans
- Mentoring
- Promotion opportunities
As a contractor, much of that responsibility moves to you. You need to monitor which skills are becoming more valuable and decide where to invest your time and money. That could mean completing certifications, learning new technology, attending industry events or deliberately targeting contracts that expand your expertise. The most successful contractors don’t simply react to the market. They continually develop skills that keep them relevant to it.
What’s the difference between contracting and permanent employment?
Neither option is automatically better and the right option depends on what matters most to you. A simplified comparison looks like this:
Contracting – Potentially higher earning potential
Permanent employment – Predictable salary
Contracting – Greater project variety
Permanent employment – Greater long-term stability
Contracting – More control over assignments
Permanent employment – Structured career progression
Contracting – Potential flexibility between contracts
Permanent employment – Paid annual leave
Contracting – Opportunity to specialise
Permanent employment – Employer benefits
Contracting – Greater responsibility for finances
Permanent employment – Less administration
Contracting – Potential gaps between contracts
Permanent employment – Continuous employment
Contracting – More responsibility for career development
Permanent employment – Employer-supported development
Who is contracting best suited to?
Contracting may appeal to you if you:
- Enjoy changing projects and environments.
- Have specialist skills businesses are willing to pay for.
- Are comfortable with periods of uncertainty.
- Want greater control over your career.
- Are organised with money.
- Can manage your own professional development.
- Are comfortable negotiating rates.
- Have or are willing to build a financial safety net.
- Don’t mind taking responsibility for administrative tasks.
On the other hand, permanent employment may be more attractive if predictable income, long-term security, employee benefits and structured career progression are your priorities.
How much should you save before becoming a contractor?
There’s no single figure that’s right for everyone. However, having a financial buffer before leaving permanent employment can make the transition considerably less stressful. Think about your essential monthly expenditure, including:
- Mortgage or rent
- Household bills
- Food
- Transport
- Debt repayments
- Insurance
- Family expenses
- Existing financial commitments
Then consider how long you could comfortably manage without contract income. Remember that gaps between contracts aren’t necessarily a sign that your contracting career is going badly. They’re part of the financial reality contractors should plan for.
Don’t compare contract rates with salaries at face value
One of the biggest mistakes first-time contractors make is comparing a day rate directly with their current salary. Suppose you’re offered a contract at £500 per day.
It can be tempting to calculate: £500 × 5 days × 52 weeks = £130,000 – and assume you’re effectively earning £130,000 a year.
But that ignores weekends, holidays, bank holidays, sickness, gaps between assignments and the costs associated with your particular engagement model. It also ignores tax and potentially other costs.
A more useful question is: How many billable days am I realistically likely to work, and what will I actually retain after the relevant costs and taxes? That’s the number you should compare with your permanent employment package.
