Intuitive, 100% online accounting software designed specifically for small businesses that need straightforward, accessible financial management.
Accounts Integration
Coretime integrates directly with leading accounting software, providing a secure two-way interface so financial data only needs to be entered once. Information flows automatically between Coretime and your accounts system, reducing manual input, improving accuracy, and saving time.
Coretime supports integrations with Sage, QuickBooks, Microsoft Business Central and Xero, allowing firms to connect timesheets, expenses, and invoicing with their existing accounting processes. This ensures consistent financial data, streamlined billing, and real-time visibility across both systems.
Supported Accounts Systems Integrations
Coretime can be easily integrated with multiple accounting applications to eliminate double-entry of data common in many businesses. Please find below details of the accounting systems we have existing integrations for. If your accounts system is not listed, don’t worry, please get in touch as we would love to work with you on creating an interface.
Xero Accounts
QuickBooks
Cloud-based accounting delivering real-time cash flow insights, clear reporting, and automated workflows—ideal for small and growing businesses.
Microsoft Business Central
Microsoft’s comprehensive, cloud-based ERP solution designed for small to medium-sized businesses to manage finance, sales, service, and operations in one place.
Sage Accounting
100% cloud-based solution delivering anytime, anywhere access with reduced hardware costs and maximum flexibility
Sage 50 Accounts
Purpose-built for businesses with up to 20 users. Automates routine accounting tasks and minimises manual data entry, freeing your team to focus on strategic work.
Sage 200
The natural progression for businesses outgrowing Sage 50 or seeking powerful functionality with enterprise-grade features.
Compatible with Sage 200 Standard and Professional.
Integration Benefits*
* Integration features vary by accounting platform. Coretime securely syncs with Sage, QuickBooks, Microsoft and Xero, with functions like invoicing, payment updates, and code mapping depending on each platform.
Synchronised Customer & Supplier Data
Create contacts in either system and automatically sync them eliminating duplicate records and ensuring addresses and details are always current across platforms.
Streamlined Invoicing
Generate sales invoices in Coretime and push them directly to your accounting system eliminating re-keying, saving time, and preventing transcription errors.
Unified Chart of Accounts
Your accounting structure imports directly into Coretime, ensuring transactions are posted and categorised correctly every time.
Discover How Coretime Can Integrate with Your Accounting System
Contact our team here or email us on sales@coretime.com to discuss your specific accounting platform, integration requirements, and the features available for your business.
Why not checkout our resources
View all our resources29 Nov 2025
Time Tracking Matters for Accountants, R&D Teams, and AEC Firms
Tracking employee hours accurately is essential for payroll, compliance, and productivity but outdated systems and spreadsheets often create errors and wasted time.
You’re in good company
Join the growing number of businesses transforming their operations with Coretime, starting from just £20/€25 per user per month. Our customers are strengthening client relationships, gaining real-time project visibility, and driving measurable growth.
Explore their success stories below and see how Coretime can deliver powerful results for your organisation at a price that makes sense.
Aircraft Leasing & Management
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
AJA Architects
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
Callisto Consulting
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
R.G. Parkins & Partners
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
GWP Engineering Consultants
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
Caulmert
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
JNP Group
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
Deaton Lysaght
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
Pete Stead – P+HS Architects
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
Spark 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
Wildfowl & Wetlands Trust
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