10 Best Software for Staff Holiday Planner with Calendar Integration

What happens when the holiday planner says a person is off, but Outlook shows nothing, Google Calendar shows something else, and the manager is still approving leave from a spreadsheet? That gap is where most small teams lose time, miss cover issues, and end up making avoidable mistakes. The best software for staff holiday planner with calendar integration closes that gap by putting approvals, availability and calendar visibility in one workflow, but the way each tool does it matters a lot. Some platforms rely on subscription feeds, others push approved leave into real calendar events, and a few go further with policy controls, reporting and mobile approvals.

This comparison looks at ten tools through the day-to-day job of a small-business manager. The focus is on checking availability, approving requests, syncing calendars, reporting accurately and migrating without disrupting staff. It also takes account of the structured workforce planning approach described in this workforce planning model, because holiday planning is really a coordination problem, not just an admin task.

LeaveWizard is the most focused option for small businesses that have outgrown spreadsheets but do not want a heavy HR suite. It gives managers a live view of leave, overtime and staffing gaps, with automatic leave calculations, configurable rules and calendar sync that keeps approvals and availability aligned.

Table of Contents

• 1. LeaveWizard
  • Why it works well in practice
• 2. Timetastic
• 3. WhosOff
• 4. edays
• 5. Breathe HR
  • A practical fit for straightforward HR administration
• 6. CharlieHR
  • A practical choice for clean administration
• 7. Sage HR
• 8. Factorial
• 9. Calamari
• 10. Personio
  • Best for scaling beyond leave
• Top 10 Staff Holiday Planners with Calendar Integration
• Choose the Calendar Connection Your Team Will Actually Use

1. LeaveWizard

LeaveWizard fits the exact problem many growing teams face, too much leave data in too many places, and not enough confidence that the calendar everyone trusts is the same calendar the manager approved. It is built for small and medium-sized businesses, with self-service web and smartphone access, fast setup and a clear emphasis on leave, absences, overtime and shift patterns. The platform says it can be up and running in under an hour, which matters when you want to move off spreadsheets without stopping day-to-day work.

A strong point is how much operational detail it handles without turning into a full enterprise HR system. LeaveWizard supports accruals, carryovers and variable entitlements, and it gives managers a single live view of who is working, who is off and where cover may be thin. That makes it especially practical for teams that need more than a calendar feed, because the planner has to keep finance, operations and line managers looking at the same absence record.

Why it works well in practice

The product is also unusually clear about usability. It offers a 30-day free trial with no credit card required, and its site positions the tool as quick to adopt for businesses that do not have an IT team to manage rollout. That simplicity matters when you are migrating from spreadsheets, because the hard part is usually not the software, it is getting staff to trust the new process.

Practical rule: if your manager still checks leave in one place and approvals in another, you do not yet have a planner, you have a visibility problem.

LeaveWizard also has the sort of detail that helps day-to-day control, including configurable visibility levels, built-in calculators and reporting that supports better absence tracking. It is a better fit for teams wanting a lightweight employee-management hub than for organisations that need deep payroll or very broad HRIS functionality. For a focused look at how it connects into calendar workflows, see the Outlook calendar sync setup and its holiday planning app overview.

Pros

• Automates leave, overtime and balances, which cuts manual checking and reduces admin errors.
• Real-time visibility with calendar sync, notifications and mobile access helps managers approve from anywhere.
• Fast setup and a free trial make it low-risk for spreadsheet replacement.
• Flexible rules and calculators support more complex leave policies.
• Strong social proof, with 6,000+ customers worldwide and customer testimonials on the site.

Cons

• Not a full enterprise HRIS, so larger organisations may outgrow it.
• Pricing is not publicly listed, so you may need a sales conversation to confirm fit.

Website: LeaveWizard

2. Timetastic

Managers can get a useful view of upcoming leave quickly with Timetastic. The platform keeps the workflow focused on requests, approvals and allowances, while calendar subscriptions send approved absence to Outlook, Office 365, Google Calendar and iCal. That suits small teams replacing spreadsheets without taking on a wider HR system.

The useful choice is how much calendar detail each person receives. Individual, team and organisation-wide subscriptions let managers share the visibility people need, rather than exposing every absence to everyone. Office teams, agencies and small operational groups can therefore check availability in the calendar they already use, approve requests in Timetastic and keep allowance records in the same place.

A manager should test the calendar connection before switching the whole team. iCal feeds may not refresh immediately in every external calendar, and update timing can affect decisions about overlapping leave. Timetastic is strongest when the calendar provides visibility and the leave platform remains the approval record.

Its scope is deliberately focused. Teams looking for payroll, employee documents or wider HR workflows may need a broader system, while smaller businesses may value the shorter setup and lower learning curve.

Pros

• Very low learning curve for teams moving away from spreadsheets.
• Calendar subscriptions for Outlook and other systems support day-to-day availability checks.
• Clean UX keeps requests and approvals easy to follow.
• Simple approvals and allowance tracking fit small-business processes.

Cons

• Not a full HR suite, so wider people administration may require another tool.
• iCal refresh may not be instant in every external calendar.
• Calendar feeds need testing, particularly where managers rely on current availability before approving leave.

Website: Timetastic

3. WhosOff

WhosOff fits SMEs that need clear absence visibility without adopting a wider HR platform. Its live iCal feeds can be configured for an individual, a team or the whole company. That gives managers control over who sees availability, which is useful when office, field and leadership staff follow different planning routines.

Calendar setup is supported by guidance for Outlook, Google, Microsoft 365 and Apple Calendar. A manager can therefore support a mixed software environment without writing separate instructions for every employee. SSO, webhooks and Zapier connections also help WhosOff fit a small operations stack, although each integration adds a setup decision to check before rollout.

For day-to-day work, the main benefit is straightforward availability checking. Approved leave can appear in the calendars people already use, while the platform remains the place to submit and manage requests. Managers should confirm how feeds update in their chosen calendar before relying on them for overlapping leave decisions.

WhosOff is a focused absence tool rather than a complete HR system. Businesses that need employee records, payroll or broader people processes may need another platform alongside it. Pricing varies by plan and user count, so compare the current structure with the size and approval needs of your team.

Pros

• Granular feed options for individuals, teams and the whole company.
• Support documentation covers several common calendar systems.
• Useful integrations through SSO, webhooks and Zapier.
• Focused absence planning keeps the core workflow easy to follow.

Cons

• Primarily absence-focused, not a full HR suite.
• Calendar feeds need testing before managers rely on them for live availability.
• Pricing varies, so plan comparison is necessary.

Website: WhosOff

4. edays

edays suits organisations that have outgrown basic leave requests and need tighter policy control, absence reporting and Outlook connectivity. Personal calendars can use iCal links, while Microsoft 365 Graph API integration supports more automated Outlook updates. Managers should confirm how those updates behave in their own environment, but the setup can shorten the gap between approving leave and seeing it in shared calendars. Guidance on what direct Outlook calendar integration involves is available in LeaveWizard's Outlook calendar sync guidance.

The platform is aimed at mid-market and enterprise organisations. It provides more control over entitlement rules, absence reasons and reporting than a lightweight holiday planner, which helps when managers must check availability against policies rather than just approve dates. HR teams can also examine absence trends instead of relying on separate spreadsheets.

That depth adds administration. Smaller businesses with straightforward leave rules may find the configuration and buying process heavier than they need, particularly because pricing is quote-based and billed annually. A manager should define approval stages, entitlement rules and reporting requirements before contacting sales, then test whether the calendar connection fits the team's daily workflow.

Pros

• Enterprise-grade Outlook integration options beyond basic iCal.
• Strong UK focus and compliance-oriented messaging.
• Advanced policy and entitlement handling for more complex absence rules.
• Useful reporting and absence insights for larger teams.

Cons

• Quote-based pricing, which makes direct comparison harder.
• Annual billing may suit established organisations better than smaller businesses.
• Greater setup depth can be unnecessary for simple leave policies.

Website: edays

5. Breathe HR

Breathe HR suits small UK businesses that want holiday administration alongside employee records and documents. It connects with Outlook, Google and Apple Calendar, so approved leave can reach the calendars staff already use rather than staying inside an HR system.

For a manager checking cover, department-level rules and approval workflows provide useful control. They help flag clashes before leave is approved, while keeping the request history in one place. The account-tier pricing model may also be easier to budget for than a purely per-user structure when headcount changes.

Breathe's UK-hosted data centre can matter to businesses that prefer a domestic HR provider. Its holiday planning remains the main strength, rather than advanced workforce analysis or complex integrations.

A practical fit for straightforward HR administration

The trade-off is depth. Breathe is built for SMB use, so teams needing detailed analytics, extensive automation or enterprise-level integration may outgrow it. Managers comparing simpler tools can also review this holiday planning app view to judge whether a lower-complexity workflow better matches their approval and calendar needs.

Pros

• UK-centric with fixed-tier pricing, supporting clearer cost planning.
• Easy to deploy for teams replacing spreadsheets.
• Holiday calendar sync with major calendar apps.
• Department-level rules help control overlapping leave.

Cons

• Feature depth is SMB-oriented, not enterprise-focused.
• Pricing tiers can change, so confirm current rates.

Website: Breathe HR

6. CharlieHR

CharlieHR suits growing SMEs that need holiday planning alongside core HR, without taking on a large implementation project. Its Time Off module gives managers shared calendar views, approval controls and sync with Google Calendar, Outlook and iCal. Staff can submit requests in one system, while managers have a clearer record of who is away and when.

The workflow is strongest for day-to-day checking. A manager can review availability before approving leave, then let calendar updates reach the tools the team already uses. Slack integration adds notifications and workflows for teams that spend much of the working day there, reducing the need to monitor several inboxes.

CharlieHR also provides transparent UK-facing pricing and VAT handling, which helps when comparing costs. Migration should be relatively manageable for a small business moving away from email or spreadsheets, although teams should still plan how existing leave records and balances will be transferred.

A practical choice for clean administration

The trade-off is feature depth. CharlieHR covers approvals, calendar visibility and employee records well, but its broader HR functions and analytics are lighter than those in larger suites. That may be appropriate for a manager who needs accurate leave reporting rather than complex workforce analysis.

Pros

• Purpose-built for UK SMEs with clear pricing.
• Clean UX for core HR and time off.
• Calendar sync with major personal and business calendars.
• Slack connectivity keeps distributed teams informed.

Cons

• Broader HR features are lighter than enterprise systems.
• Advanced analytics are limited.

Website: CharlieHR

7. Sage HR

Need a leave planner that can grow into wider HR administration? Sage HR takes a modular route. Its calendar sync can send either the full Sage HR calendar or only personal time off to Google and Outlook. That choice helps managers control what colleagues see, particularly where departments have different calendar requirements.

For a small business, the practical workflow is straightforward. Staff request leave in Sage HR, managers check availability and approve it, then the selected calendar receives the relevant update. That reduces manual copying between a leave record and shared calendars, while giving managers a clearer basis for reporting.

You can begin with the Leave module and add performance, expenses or recruitment later. This avoids paying for functions you do not yet need, although the eventual cost depends on the modules and configuration selected. Confirm the complete package before comparing it with a leave-only platform.

Pros

• Straightforward calendar connections with granular sync choices.
• Modular approach lets you start with Leave only.
• Mobile apps and policy workflows support everyday use.
• Widely used in the UK, which may reduce familiarity barriers.

Cons

• Pricing varies by module, so confirm the final cost.
• Total spend depends on configuration.
• Broader functionality may add complexity for teams needing only holiday tracking.

Website: Sage HR

8. Factorial

Factorial suits growing teams that already work in Microsoft 365 or Google Workspace. Approved time off can appear in Outlook Calendar, Google Calendar and iCal, giving managers a clearer route from request to the shared calendar staff use.

For a small-business manager, the useful test is whether this reduces checking across separate systems. Factorial provides a central view of absences and events, while its UK localisation and mobile apps support approvals across sites and while travelling. Managers should still confirm how updates behave in their chosen calendar before migrating, particularly if staff rely on different platforms.

The wider platform covers people operations beyond holiday planning, with modular add-ons available as the business grows. That can support consistent records and reporting, but it also makes selection and budgeting more involved than with a leave-only tool. Check which modules are included, how calendar connections are configured, and whether the full package fits the team's workflow.

Pros

• Strong Microsoft 365 and Google ecosystem fit.
• Centralised calendar view makes approved absences easier to check.
• UK-facing pricing and localisation information is available.
• Mobile apps help managers approve requests away from their desk.
• Modular add-ons can support expansion beyond leave tracking.

Cons

• Some features are add-ons, so compare the complete package.
• Broader functionality may add complexity for teams needing only holiday records.
• The cost may be less competitive as headcount grows.
• Migration requires calendar and reporting checks before staff move over.

Website: Factorial

9. Calamari

Calamari suits distributed teams that need absence to be visible during everyday scheduling. It syncs with Google Calendar, Microsoft 365 and Outlook, and supports iCal feeds. Approved leave can appear as Out-Of-Office events, so colleagues checking availability are less likely to book over someone's time off.

That visibility affects practical work. A manager can review the calendar before approving a request, while colleagues see the absence in the tool they already use. Calamari also supports request and approval flows through Teams and Slack, which reduces the need to move between systems. Its visibility controls let organisations decide who can view particular absence records.

For a small-business manager, the main question is whether the OOO behaviour matches the team's calendar setup. Test how updates, cancellations and changes appear in each connected platform before migrating staff. This matters especially when some employees use Google Calendar and others rely on Outlook.

Pricing scales with active users, and add-ons can increase the total cost. That may be reasonable for a distributed team that values calendar visibility, but a smaller business wanting only basic holiday records should compare the full package carefully. The earlier Google Calendar comparison provides another reference point.

Pros

• Approved leave appears as true OOO events in Outlook and Google.
• Flexible integrations suit distributed teams.
• Teams and Slack workflows fit existing approval habits.
• Visibility controls limit unnecessary exposure.

Cons

• Pricing scales with active users, so costs can rise.
• Add-ons can increase the price.
• Calendar behaviour should be tested before migration.

Website: Calamari

10. Personio

Personio suits organisations that want holiday planning inside a wider HR system as they grow across the UK and Europe. It connects time off with Google Calendar and offers integrations with Teams, Slack and SSO. Recruiting calendar support through Cronofy also keeps hiring activity closer to the rest of the HR record.

That centralisation can reduce duplicate updates. A manager can review absence alongside employee and recruitment information, approve requests in one system and produce more consistent reports. The trade-off is scope: a small business that mainly needs a clear holiday calendar may find Personio more system than it requires.

Best for scaling beyond leave

Personio is a sensible shortlist option when leave management is one part of a broader HR plan. Its calendar connectors reduce manual copying, but quote-based pricing makes comparison harder. The platform is generally positioned for organisations with 50+ headcount, so smaller teams should assess expected growth, implementation work and migration effort before committing.

For a leave-first setup, compare the wider HR approach with LeaveWizard's Google Calendar integration. The practical choice depends on whether managers need recruitment and wider employee records in the same platform, or a focused planner that staff can adopt quickly.

Pros

• Suitable as a single HR system of record for scaling organisations.
• Native calendar connectors reduce manual admin.
• Broad integrations cover Teams, Slack and SSO.
• Recruiting calendar support adds value for growing teams.

Cons

• Quote-based pricing makes costs harder to compare.
• Often aimed at 50+ headcount, so it may be too much for very small SMEs.
• Broader implementation requirements can make migration more involved than a leave-only tool.

Website: Personio

Top 10 Staff Holiday Planners with Calendar Integration

Choose the Calendar Connection Your Team Will Actually Use

The right choice starts with your real workflow, not the vendor demo. Define your headcount, leave policies, approval roles, calendar ecosystem and reporting needs first, then decide whether you need a subscription feed, a direct connector or a true out-of-office event. That distinction matters because a feed can be good enough for visibility, while a direct connector may be needed if the manager wants approved leave written straight into Outlook or Google Calendar.

For UK businesses, calendar planning also has to respect holiday rules and regional differences. Bank holidays can be included as part of statutory annual leave, and there is no statutory right to paid leave on bank or public holidays, so contract terms matter more than assumptions. The UK also has different bank-holiday calendars by nation, which means region-aware planning is essential if your team works across England, Scotland and Northern Ireland.

Before you migrate, run a short test with real leave rules, not a toy example. Check mobile approvals, permissions, calendar updates and reports, then make sure the tool behaves properly when people book half days, sick leave or overlapping requests. If the system only works in the easiest scenario, it will create problems later.

Migration should be tidy, not rushed. Clean employee records and entitlement balances, map policy names before import, preserve existing balances, communicate the cutover date and run a parallel check for the first cycle. You should also confirm how historical absence data will be retained, because reporting is only useful if old records stay accessible when finance or HR needs them.

A sensible buyer's checklist is simple. Ask about calendar sync, approvals, mobile self-service, reporting, compliance, pricing, support, security controls, add-on costs and scalability. Then choose the platform your managers will open every morning, because if the calendar isn't trusted, the holiday planner won't be either.