We believe contractors should be supported and rewarded throughout their careers.
Businesses across the UK rely on skilled contractors every day – bringing specialist expertise, experience and fresh thinking into their teams, often exactly when they need it most.
We have enormous respect for the professionals who choose to work this way and believe they deserve an umbrella company that recognises the contribution they make.
That's why we've been supporting contractors across the UK since 2003. More than two decades and 130,000 contractors later, our principles remain the same: to make umbrella employment straightforward, transparent and supportive, so you can concentrate on doing what you do best.
When operating through your own limited company isn't an option, choosing the right umbrella company matters. As a Key Portfolio employee, you benefit from the protections and rights that come with employment, together with the support of an experienced team that understands the contractor market.
We're FCSA Accredited and SafeRec Certified, providing additional independent reassurance over the standards behind our service and the way your pay is processed.
But for us, being a good umbrella company is about more than processing payroll. It's about valuing you as an employee, being there when you need us and making sure you always have someone to turn to when you have a question about your pay or employment.
After all, we've been looking after contractors since 2003 – and we're very proud that more than 130,000 of them have trusted us to do just that.
We are a specialist recruitment process outsourcing company, providing payroll and accounting services to contractors and recruitment agencies.


Source Pay is a leading payroll provider, offering umbrella, PAYE and CIS solutions. We act as an intermediary between a contractor (worker) and the end client or recruitment agency. We employ the contractor and handle all administrative, tax, and payroll responsibilities on their behalf.

Since 1992, Giant have provided specialist, end to end workforce management software and support services for workers and organisations of all sizes. Globally.
At Giant Umbrella, we have designed everything to be simple, paperless and hassle-free. We ensure that workers receive the right level of support when on assignment, we take care of all PAYE tax deductions, as well as provide a mobile 1st portal for easy access at any time.
Here’s why workers and agencies choose Giant Umbrella;
At Giant however, we do much more. Our software includes everything from applicant tracking software and vendor management to invoicing, international payroll & payments. When it comes to contractors getting paid, we are proud to offer a number of compliant solutions including PEO and CIS for any contractor in the Construction Industry Scheme.

MMC is a SafeRec Accredited commercial contractor offering contracting services to the temporary labour market.
Pay Guardians operate a simple and efficient umbrella and PEO service for agencies and workers. Our processes are fully documented and comply wholly with employment and tax legislation leaving you free from the burden of ensuring yours and your temporary workers affairs are fully managed. Our team of qualified accountants and payroll specialists with years of experience will ensure piece of mind and provide the highest quality of personal service throughout.

Your trusted partner, experts in Legislation, Contracts, Insurances and Payroll. Honesty and transparency are at the heart of our operations and with over 25 years experience in contractor engagement, we get it. We offer a tailored and consultative approach to our workers, agencies and end clients and we'll be your first point of contact for any advice or guidance you need.

We are a Payroll Company with a difference. We care and are here to help make sure your pay is correct. We have the knowledge and experience to get it right and ensure everything is being dealt with correctly.

Putting Contractors First, Every Step of the Way
With over 20 years of experience supporting contractors and freelancers, SmartWork combines the reassurance of full compliance with the personal service you’d expect from a team that genuinely cares about your success.
Compliance You Can Trust
We’ve held FCSA accreditation for 10 years and have been an APSCo Trusted Partner for over 20 years – certifications that are rigorously audited annually to protect contractors and give recruitment agencies complete confidence.
Our ISO 27001 certification protects your data security, while our SafeRec certification helps recruitment partners minimise compliance risk across the supply chain.
A Service Loved by Contractors
Our commitment to supporting contractors is reflected in our outstanding Google and Trustpilot reviews. When you work with SmartWork, you’re not just a number; you get a dedicated account manager and a team that’s there to help every step of the way.
What We Offer:
For Contractors:
Get paid faster – Same-day payments at no extra cost
Stay in control – Secure online portal for payslips, timesheets, and documents
No hidden costs – Transparent pricing with no setup or exit fees
Fully protected – Comprehensive insurance including Public & Employers’ Liability, Professional Indemnity, and Medical Malpractice
Proper employment – Full contract of employment with all statutory benefits
Life perks – Referral reward, private pension support, and access to contractor- specialist mortgages Quick to start – Set up in as little as 15 minutes, online or by phone
For Recruitment Partners:
Real-time payroll verification – SafeRec certification for live compliance checking
Dedicated agency support managers – Your direct line to our team
Advance payment facilities – Available for preferred partners
Trusted track record – Featured on over 100 Preferred Supplier Lists
Seamless contractor experience – Making your candidates’ journey smooth and compliant
Click on one of the links to the left to contact us; we’d love to hear from you.