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Case Study

Simplex Accounting cuts payroll and supplier payment processing time by 50% with Modulr

Founded nearly four years ago by Lucy Johnson, Simplex Accounting is a forward-thinking accountancy practice focused on technology, automation, and enhancing client experience.  

Based in the UK, the team of three serves a range of small to medium-sized businesses, with particular focus on construction and creative sectors. Their services span from tax returns and VAT to full advisory support. 

Lucy’s hands-on role involves everything from sales conversations to operational improvements, with a strong emphasis on leveraging the right tools and tech to improve workflows for clients and internally. 

50%

Reduction in processing time

The challenge: Clunky, error-prone payment processes  

Before adopting Modulr, Simplex clients were managing payroll and supplier payments manually through traditional banks. “It was clunky,” Lucy recalls. “Clients were processing their own payments, which led to delays and mistakes.” Supplier payment issues were especially chaotic, with mismatches in accounting records, incorrect amounts, and general confusion. 

“One client was doing everything manually, from payroll to supplier payments, and it led to frequent errors, delayed payments, and a ton of back and forth. It just wasn’t smooth,” Lucy explains.  

For clients in the construction industry, the complexity of handling supplier credits and returned materials made things even messier. 

Simplex needed a way to reduce friction, minimise errors, and ultimately deliver a smoother, more professional service to their clients. 

Why Modulr?  

Lucy discovered Modulr via industry conversations and social media discussions around workflow automation. Modulr's integration with BrightPay and Xero caught her attention immediately. “We needed something that worked with our software and streamlined the whole process,” she says. 

The appeal? End-to-end workflow support, automation, and a solution that offered reliability and visibility for clients.  

Modulr stood out for its strong integration capabilities and ease of use. Being able to offer a full solution—from payroll to supplier payments—gave Simplex a real edge in enhancing their client offering. 

“Modulr allowed us to turn a payroll service into a full, managed payment process."
Lucy Johnson, Founder

Seamless and scalable adoption 

Transitioning to Modulr was smooth, particularly thanks to its compatibility with Simplex’s existing tech stack.  

Clients retain control of payment approvals, but benefit from a system that reduces their workload significantly. “We give clients an end-to-end system. They get the reassurance of oversight while we handle the heavy lifting,” Lucy explains. The mobile app adds another layer of convenience, giving business owners control from anywhere. 

Lucy also praised Modulr's flexibility. “I can customise the service depending on what each client needs—payroll, supplier payments, or both. That makes it easier to offer a solution that really fits.” 

Simplex logo white

Everything talks to each other now. Even down to reconciliations in Xero—it's all automated. The reduction in errors and client comms alone makes it a no-brainer. 

Lucy Johnson, Founder

The results?

50% reduction in processing time and greater client trust. By automating payroll and supplier payments through Modulr, Simplex has cut processing time by at least 50%. "That includes everything from chasing payments to fixing errors and reconciling transactions," says Lucy. "The time savings apply to both us and the client." 

For the clients, faster payments and reduced admin mean fewer headaches. "They don’t have to worry about whether suppliers have been paid or whether payroll went out on time—it just works." 

Beyond time savings, Modulr has helped enhance client trust. "It looks reliable, it is reliable, and it reflects well on us," Lucy shares. "We can offer a full, end-to-end process with reduced errors and greater peace of mind." 

"Errors in payroll or supplier payments can really damage trust. Modulr helps us protect that relationship by giving clients confidence in the process." 

Supporting growth and client success  

As Simplex continues to grow, Modulr scales with them. Its flexibility allows Lucy to tailor the service to different client needs—focusing on payroll for some, supplier payments for others. "It’s customisable and reliable, which makes it a perfect fit as we expand." 

Lucy also highlighted Modulr's role in helping her clients grow. "We’re not just helping them tick boxes—we’re showing them how to use tech in a way that actually helps their business run smoother." 

Whether it’s automating repetitive tasks or reducing manual errors, Modulr supports both Simplex and its clients in working smarter, not harder. 

“If there’s a better way to do things, we’ll always push for it—and Modulr is the better way.” 

If your firm is grappling with clunky, time-consuming payment processes, Modulr can help. Discover how we can save you and your clients hours each month—get in touch today. 

Read how Modulr directly impacts your small business clients like Send It Direct, who now automate 400+ payments a month. 

 

Products used
Accounts
Pay Ins
Pay Outs
Integrations

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