Our Mission
We believe professional service firms run on time. Our mission is to give every firm a clear, real‑time view of where time goes, how projects perform, and which work is truly profitable without adding that extra admin.
Helping professional service firms turn time into insight since 2020. Our mission is simple: make it effortless to capture time, understand profitability, and get invoices out accurately and on time.
Our mission is simple: make it effortless to capture time, understand profitability, and get invoices out accurately and on time.
We believe professional service firms run on time. Our mission is to give every firm a clear, real‑time view of where time goes, how projects perform, and which work is truly profitable without adding that extra admin.
We work with firms who sell expertise, not products.
That focus means we understand your workflows, terminology, and reporting needs – from RIBA stages to utilisation targets and write‑offs.

At Coretime, our deep expertise with Sage software and integrations enhances our offerings. With extensive knowledge of Sage 50, Sage 200, and Sage CRM, we seamlessly integrate Coretime’s time tracking, expense management, and project management software with a wide range of business systems, helping organisations streamline workflows, improve data accuracy, and manage consultant timesheets, WIP, and project profitability effectively.
Coretime is headquartered in 3 Sceptre House, Hornbeam Square North, Harrogate HG2 8PB supporting firms across the UK, Ireland, Europe and beyond.
We’re a group of product specialists, consultants and support professionals who’ve worked with professional service firms for years.
12 Aug 2024
Established in 1979, Coventry-based Alan Johnson Associates Chartered Architects have built a solid reputation in a…
12 Aug 2024
Caulmert is an engineering, environmental and planning consultancy with ambitious growth plans. They work across multiple…
12 Aug 2024
Callisto Consulting is a strategy and digital-delivery consultancy that provides technology assessments, programme management, and project…
10 Feb 2025
Bennett Freehill is a sustainability engineering consultancy delivering environmentally responsible building solutions across the UK. As…
19 Jun 2024
Wildfowl & Wetlands Trust Consulting (WWT Consulting) is the UK’s leading specialist wetland-related environmental consultancy. Based…
Coretime are a real business partner, I find them very helpful, and if I have any questions or queries the support team is there to help me instantly. In short, we’re delighted.
Amanda Godwin
GWP Engineering Consultants
The Coretime system is easy to use, accurate, and has helped to increase our efficiencies, we would absolutely recommend it to other companies in that we find it invaluable.
David Heron
R.G. Parkins & Partners
With staff based at different office locations and sometimes different parts of the world, having Coretime has brought us all together using one easily accessible web based system.
Donna Milne
Caulmert
Coretime is simply the easiest, yet the most economically advantageous programme that does so much more than just time management. The overall impact of Coretime has improved both productivity and efficiency.
Elizabeth Churchard
Deaton Lysaght
Coretime is one of the most important packages within the business and is based on an annual subscription with full cloud access. This is a truly fantastic system and very affordable for a company of our size, it’s a fraction of the cost of some systems such as Autodesk and Microsoft.
Jamie Seabrook
JNP Group
For us, the main benefit is that our system is now more user-friendly in terms of project managers being able to access information, such as seeing how a project is performing against budget. They can analyse how time is being spent and what proportion of it is earning fees – it’s easy to translate.
Matt Simpson
AJA Architects
It’s cut the time spent on routine administrative tasks and enabled us to be more efficient, which means we can focus more on the actual projects. We can have around 20 live projects on the go at any one time and if a client wants a breakdown of where the time is going, we need to respond almost instantly.
Monica
Wildfowl & Wetlands Trust
We have recently purchased Coretime through Onesys and were impressed with their responsiveness to our original enquiry and to our subsequent questions. The process for understanding what the software could do for us was efficient and straightforward, as was the administration involved in setting-up the account and finalising the agreement.
Nicola Plummer
Aircraft Leasing & Management
Since purchasing Coretime our time spent on administrative tasks, especially around invoicing has greatly reduced. We can also now respond to Client queries much more efficiently and with a more accurate, trusted response.
Overall the processes that we undertake using Coretime are much quicker and simpler and along with the benefits we’re now receiving in how we can report on our Project data using different parameters, we expect to see a return on investment within a year based on administration time saved.
Paul Bunyan
Callisto Consulting
A huge positive for us is the reduction of double entry of information, not having to manipulate information and enter it somewhere else has made such a drastic difference to how we run our business, we can’t imagine not having Coretime now!
Pete Stead – P+HS Architects
We will be able to easily track non-billable work such as fee proposals and revisions, track outstanding invoices versus paid, and understand budget versus actuals and profitability at both project level and RIBA stages.
Spark Architects