Most UK businesses reach a point where the spreadsheet stops working. Timesheets go missing, payroll takes too long, and nobody trusts the numbers. So they buy a SaaS time tracking tool — and discover a different set of problems: rigid approval flows, weak payroll integration, no native HMRC RTI support, and per-user fees that climb every time someone new joins.
We build custom timesheet tracking software for UK businesses. You own the code, there are no monthly per-user subscriptions, and the system fits your actual workflows — including the messy approval chains and payroll rules that off-the-shelf tools cannot handle.
Why off-the-shelf timesheet software falls short
Tools like Clockify, Harvest, and Toggl look good in a demo. The trouble starts once your team tries to use them for real work.
Approval workflows are too rigid. Most SaaS tools offer one or two approval levels. If your business needs conditional routing — say, timesheets over 50 hours go to the department head and the finance director, or the approver changes depending on the project type — you are stuck building workarounds or abandoning the feature entirely.
Payroll integration is shallow. The typical SaaS timesheet tool can export a CSV. But getting time data into Sage, Xero, or QuickBooks in the right format, with the right field mappings, reliably and on time, usually means someone in payroll is still doing manual work. Data syncs run on a schedule rather than in real time, and custom field mapping is limited. When the vendor updates their API, integrations break.
HMRC RTI is an afterthought. UK businesses must submit Real Time Information to HMRC on or before each pay day. Penalties start at £100 per month for non-compliance. Most timesheet tools — Clockify, Harvest, Toggl, Jibble — have no native RTI integration at all. Your payroll team has to manually export, reformat, and re-enter data into payroll software that does handle RTI. That is slow, error-prone, and exactly the kind of admin a timesheet system should eliminate.
Per-user pricing gets expensive. A 50-person team on a mid-tier SaaS plan (£8 to £18 per user per month) will spend £14,000 to £32,000 over three years — and that is before you factor in the hidden costs: premium API access, GPS tracking add-ons, integration setup fees, and support tier upgrades when things go wrong.
UK compliance is bolted on, not built in. Working Time Directive monitoring, holiday accrual calculations, wage and hour enforcement, and GDPR-compliant data handling are either missing or require expensive plan upgrades. Some tools store data outside the UK, raising data residency questions.
Field teams get surveillance, not tools. SaaS products aimed at field workers often bundle screenshot capture, keystroke logging, or invasive productivity tracking. Employees resist it, and it raises genuine GDPR concerns. What field teams actually need is simple: clock in, GPS verification, offline mode, sync when back online.
The result is familiar. Half the team reverts to spreadsheets. Payroll still takes two days. The software you are paying for monthly goes underused.
What we build instead
We are a UK-based team that builds timesheet systems around how your business already operates — not how a SaaS vendor thinks it should operate.
Your approval logic, built properly. If your approval chain has conditional routing, multi-level sign-off, escalation rules when approvers do not respond, or different paths for different project types, we build that as the core workflow — not a workaround on top of a rigid system.
Direct payroll integration. We connect your timesheet system to Xero, QuickBooks, Sage Payroll, BrightPay, or whatever you use, with proper OAuth authentication, field mapping, and error handling. Time data flows into payroll runs automatically. For businesses that need it, we can automate HMRC RTI submissions so approved timesheets trigger the Full Payment Submission directly.
One-time cost, no per-user fees. You pay for development and own the result outright. Adding your 51st or 501st user costs you nothing extra. No subscription creep, no minimum seat requirements, no surprise price increases.
UK compliance from day one. Working Time Directive limits, statutory holiday accrual, overtime alerts, GDPR-compliant data handling with encrypted storage and immutable audit logs, and UK data residency. These are not bolt-ons — they are part of the foundation.
Sensible field tracking. If you have teams on site, we build a lightweight mobile app with GPS clock-in, geofencing, offline capability, and automatic sync. No screenshots, no keystroke logging — just the features your team needs and will actually use.
Modular architecture. Start with what you need now. Add expense tracking, invoicing, leave management, or advanced analytics later without rebuilding the core system.
Core features
Every system we build is shaped by your requirements, but most timesheet projects include some combination of these:
Time entry and management
- Running timer, manual entry, or weekly timesheet grid — whichever suits your team
- Project, task, and client assignment with billable and non-billable tracking
- Daily, weekly, or period-based timesheet submission
Approval workflows
- Single or multi-level approval with conditional routing
- Rejection with comments, escalation timeouts, and automatic reminders
- Approval logic tied to your actual org chart and business rules
Payroll and accounting integration
- Direct API connections to Xero, QuickBooks, Sage, or your existing payroll system
- Automated RTI-ready payroll exports or direct HMRC submission
- Rate tables for billable hours, overtime multipliers, and variable pay structures
Mobile and field workforce
- Responsive web app or native mobile apps for iOS and Android
- GPS verification and geofencing for site-based clock-in
- Offline mode with automatic sync for areas with poor connectivity
Reporting and dashboards
- Hours by user, project, client, and date range
- Project profitability: billable vs non-billable, budget vs actual, margin analysis
- Team utilisation rates and resource allocation
- Labour cost dashboards with real-time budget burn tracking
- Custom payroll export formats (CSV, API, or direct integration)
Compliance and audit
- Working Time Directive monitoring with automatic overtime alerts
- Holiday entitlement and accrual calculations
- Immutable audit trails logging every entry, edit, and approval
- GDPR data handling: encryption, retention policies, subject access and erasure support
- UK data residency
Permissions and access
- Role-based access: employees see their own data, managers see their teams, admins see everything
- Configurable views by department, cost centre, or project
How the build works
Discovery and planning (2 to 3 weeks). We map your current processes — how time gets recorded today, who approves what, where data goes for payroll, and where the pain is. We document your approval chains, integration points, and compliance requirements, then write a detailed specification. This is also where we identify what belongs in the MVP and what can wait for Phase 2.
MVP development (8 to 12 weeks). A typical first release includes time entry and timesheet management, approval workflows, payroll export or accounting integration, a basic mobile app, and core reporting. You see working software throughout — not just at the end. We build iteratively, so you can test and give feedback as we go.
Integration testing (2 to 3 weeks). We run end-to-end testing with your actual payroll and accounting systems using real data formats. This is where most SaaS implementations fall over — integration issues only surface when you test against live systems, not demo environments.
User acceptance and rollout (2 to 4 weeks). Your team tests the system against real scenarios. We fix issues, refine workflows, and handle the cutover from your old system. We typically run old and new systems in parallel for a short period to catch any gaps.
Training and handover. We train each user group to their level: 30 to 60 minutes for employees on basic time entry and submission, a couple of hours for managers on approvals and team reporting, and more detailed sessions for payroll and admin staff on exports, configuration, and troubleshooting.
Phase 2 (ongoing). Once the core system is stable, common additions include advanced approval automation, project profitability analysis, expense tracking, client invoicing, RTI automation, leave and absence management, and custom reporting dashboards.
Most projects go live within 3 to 6 months total.
What it costs
A custom timesheet system costs more upfront than signing up for a SaaS product. A straightforward build — time entry, approvals, Xero integration, basic reporting, mobile app — typically starts around £30,000. More complex systems with field workforce features, RTI automation, advanced approval logic, and multiple integration points can reach £50,000 to £80,000.
Ongoing support and maintenance usually runs around £8,000 per year.
To put that in context: a 50-person team on Harvest (£9 per user per month) spends £16,200 over three years and £27,000 over five years. A team on Replicon’s Premium tier (£18 per user per month) spends £32,400 over three years and £54,000 over five years. And those figures do not include integration setup fees, premium support costs, or the admin time your payroll team spends working around integration gaps.
A custom build typically breaks even within two to three years. For teams of 100 or more, the economics shift decisively — because your costs stay flat while SaaS fees scale linearly with headcount.
Beyond cost, you keep full control. No vendor can increase your price, retire a feature you depend on, deprecate an API you have built around, or restrict your data export. The code and the data are yours.
Industry applications
Professional services (consulting, accountancy, law). Precise billable hour tracking tied directly to client invoicing. Rate tables by client, matter, or phase. Margin reporting showing which projects are profitable and which are leaking hours to non-billable work. Utilisation dashboards so partners can see where capacity sits.
Construction and field services. Mobile clock-in with GPS verification at job sites. Offline mode for remote locations. Subcontractor hours tracked alongside permanent staff. Job costing that ties labour hours to specific projects and cost centres. Integration with construction project management tools.
IT services and software development. Sprint-based time tracking integrated with Jira or GitHub. Billable vs internal project splits. Developer utilisation reporting. Client-facing time reports for transparent billing on time-and-materials contracts.
Creative agencies. Task-level time recording against client projects. Budget tracking with burn-down reports so project managers spot overruns early. Resource allocation by skill type (designer vs copywriter vs director). Billable hour conversion directly into invoicing.
Healthcare. Shift scheduling within Working Time Directive and CQC compliance limits. On-call and break tracking. Absence management with automatic cover booking. Payroll integration for complex shift differentials and variable pay.
Manufacturing and logistics. Shop-floor time tracking tied to production batches and output. Shift pattern management. Overtime flagging before it becomes a problem. Labour cost correlation with production efficiency metrics.
Education. Timetable-integrated time tracking for variable-hour contracts. Absence and cover management. Payroll calculations for complex contract types. Ofsted-friendly record keeping.
Hospitality and retail. Multi-location rota management. Break compliance tracking. Labour cost as a percentage of revenue in real time. Seasonal workforce management with flexible scheduling. Split-shift support and tip allocation.
The specifics change with every client. The approach stays the same: we build around how your business actually works, not how a software vendor assumes it works.
Common Questions About Custom Timesheet Tracking Software
How does custom development cost compare to SaaS timesheet tools?
For a 50-person team, typical SaaS tools cost £14,000 to £32,000 over three years (at £5 to £18 per user per month). A custom build usually starts at £30,000 to £50,000, with annual support around £8,000. You typically break even within two to three years, and the gap widens in your favour as headcount grows — because your costs stay flat while SaaS fees scale with every new user.
What's the typical development timeline?
An MVP with time entry, approval workflows, payroll export, and a basic mobile app usually takes 8 to 12 weeks. Adding field workforce features (GPS, geofencing, offline sync), RTI automation, or advanced approval routing extends that to 16 to 24 weeks. Most projects go live within 3 to 6 months.
Can you integrate with our payroll and accounting software?
Yes. We build direct integrations with Xero, QuickBooks, Sage Payroll, and BrightPay, among others. We handle OAuth authentication, field mapping, and error handling so time data flows into your payroll runs without manual re-entry. For businesses that need it, we can also automate HMRC RTI submissions.
What about GDPR and UK data compliance?
Time tracking data is personal data under UK GDPR. We build in encrypted storage, immutable audit logs, configurable data retention (typically six years for tax and employment records), and support for data subject access and erasure requests. We also ensure UK data residency where required.
Do you build mobile apps for field teams?
Yes. We can build a lightweight mobile app with clock in/out, GPS verification, offline mode for areas with poor connectivity, and automatic sync when back online. Unlike some SaaS tools that bundle surveillance features like screenshot capture, we build only what your team actually needs — which helps with both GDPR compliance and employee buy-in.
What happens after launch?
We provide staff training tailored to each role — typically 30 to 60 minutes for employees, a couple of hours for managers and approvers, and more in-depth sessions for payroll and admin staff. We also offer ongoing support packages for bug fixes, updates, and new features as your business changes.
When does a SaaS tool make more sense than a custom build?
If you have a small team (under 50 people), standard approval flows, no complex payroll or compliance requirements, and you are happy working within the tool's existing workflows, a SaaS product like Clockify or Toggl will probably serve you well. Custom makes sense when your approval chains, billing rules, integrations, or compliance needs go beyond what off-the-shelf tools support — or when per-user pricing becomes painful at scale.