Best Software for Staff Holiday Planner with Calendar Integration

You're trying to approve a holiday request while checking a rota, Outlook, a shared Google Calendar and a spreadsheet that may already be out of date. Then someone asks how much allowance remains, whether a bank holiday applies to their location, and who can cover the shift. Manual tracking turns a routine approval into a small investigation.

The best software for staff holiday planner with calendar integration depends on more than whether a product displays annual leave. The important differences are business size, approval complexity, calendar-sync method, mobile access, pricing model and the amount of HR functionality you need. This comparison looks at lightweight leave planners and broader HR platforms through the working manager's day, from replacing spreadsheets to checking calendar accuracy, protecting staffing coverage and keeping records usable for payroll and compliance.

UK employers also need to treat leave tracking as an operational control. Almost all workers are entitled to 5.6 weeks of paid leave each year, equal to 28 days for a five-day worker, although the entitlement is capped at 28 days even when someone works more than five days a week. The GOV.UK holiday entitlement guidance explains why a planner must handle different working patterns, accruals and approved absences rather than just colour-code a calendar.

Table of Contents

• 1. LeaveWizard
  • Why managers choose it
• 2. Timetastic
  • Where it works best
• 3. WhosOff
  • A sensible choice for visible team planning
• 4. e-days
  • Built for policy variation
• 5. Breathe HR
  • The SME trade-off
• 6. CharlieHR
  • Good for small-team HR coordination
• 7. Sage HR
  • Useful for a Sage-centred stack
• 8. Factorial HR
  • A balanced HRIS for SMEs
• 9. Personio
  • When broader HR matters
• 10. BambooHR
  • Strong platform, heavier operating model
• Top 10 Staff Holiday Planners, Calendar Integration Comparison
• Choose the Planner That Fits Your Working Day
  • Compare the operating fit
  • Move from a spreadsheet safely

1. LeaveWizard

A manager approving leave needs more than a row of coloured cells. LeaveWizard suits small and mid-sized businesses replacing spreadsheets without taking on a full HRIS. It provides a live view of attendance and availability, while employees submit requests through web and smartphone apps. Managers can review cover and approve absence without asking staff to update separate calendars.

The platform handles leave calculations, accruals and carryovers, and records overtime and short bookings in 15-minute increments. That level of detail helps teams with varied schedules or policies that do not fit a standard full-day booking. Built-in calculators and reports also support forecasting and payroll preparation.

Why managers choose it

LeaveWizard pairs a straightforward interface with rules for shifts, overtime and different leave policies. Managers receive real-time calendar views, email and in-app notifications, configurable visibility and approval workflows. Employee self-service reduces balance queries and removes the risk of multiple people editing a master spreadsheet.

Its Google Calendar integration helps distributed teams see approved leave alongside existing schedules. Calendar visibility makes daily cover checks quicker, but the leave system remains the authoritative record for entitlement, approval and absence history.

Practical rule: Use the calendar to show the operational impact of approved leave. Keep entitlement, approvals and absence history in the leave system.

Setup is intended for non-technical users and can be completed in under an hour with no IT required, according to the supplied product information. The service has adoption across 6,000+ customers worldwide, and the vendor offers a 30-day free trial with no credit card required. The main trade-off is that subscription pricing is not published, so managers must contact the vendor after testing the product. Larger organisations with advanced HRIS requirements may need a broader platform. See LeaveWizard for product details.

2. Timetastic

Timetastic is a practical choice for an SME that wants to leave spreadsheets behind quickly and keep the process focused on annual leave. Its strength is not an enormous HR feature set. It's the speed at which a manager can see team availability, handle a request and get approved absence into the calendars people already use.

The platform can push approved absences to Outlook 365, Outlook.com and Google Calendar, while iCal and Webcal feeds support team or company-wide visibility. That gives managers a useful distinction between personal calendar updates and shared subscription feeds. It also supports allowance rules, carry-over, clash and lock dates, with insights available on its Pro offering.

Where it works best

Timetastic suits teams that don't need recruitment, performance management or payroll in the same application. Slack and Microsoft Teams notifications, along with daily and weekly email digests, help keep approvers aware of upcoming absences without forcing them to open the planner constantly.

• Fast rollout: The interface needs little training, which helps when employees have different levels of technical confidence.
• Calendar convenience: Personal calendar synchronisation keeps managers from checking a separate tool for every approved booking.
• Straightforward billing: Month-to-month billing and a 30-day free trial make initial testing easier.

The limitation is depth. Timetastic is a leave tool rather than a full HRIS, and department or team subscriptions through iCal are read-only. Refresh timing can also depend on the employee's calendar client, so test the feed with the actual Outlook or Google setup used by your team. A detailed Timetastic review can help buyers compare that simplicity with the more policy-heavy options in this list. See the product at Timetastic.

3. WhosOff

WhosOff takes a straightforward leave-planner approach and adds the calendar connections that growing UK teams expect. It provides clear approvals, balance tracking and company-wide visibility without trying to become an all-purpose HR platform. That makes it suitable for a manager who wants dependable leave administration, but doesn't need documents, performance reviews and payroll workflows in the same system.

Calendar access is built around subscriptions. Employees and managers can subscribe to leave calendars from Outlook and Google through iCal feeds, including company and department views. The arrangement is useful for planning meetings and cover, but it has an important operational limitation: iCal subscriptions are read-only, and the refresh schedule is controlled by the calendar client rather than necessarily appearing instantly.

A sensible choice for visible team planning

WhosOff supports configurable policies and approval routing, mobile apps, Slack and Teams connections, webhooks and single sign-on options including Google Workspace, Azure, Okta and Auth0. Those options give IT and HR more control than a basic shared calendar, particularly where access management matters.

Its pricing calculator and free trial make initial comparison easier, and published UK phone support hours may appeal to teams that prefer a clearly available support channel. The trade-off is that broader HR functions are basic or optional, so a business looking for integrated payroll, performance or employee-document management may eventually need another platform.

A read-only calendar feed is useful for visibility, but it shouldn't be mistaken for a two-way workflow. Approvals and entitlement changes still need to happen in the leave system.

Check the current product and support arrangements at WhosOff before choosing it for a team where instant calendar updates are essential.

4. e-days

e-days is better suited to mid-market, multinational and multi-location organisations than to a very small team looking for a digital wallchart. It supports several ways to put approved absences into calendars, including iCal, Exchange and Microsoft Graph, so an organisation can choose an approach that fits its IT controls and security preferences.

That flexibility is valuable when different departments use different calendar environments. A personal calendar feed may be enough for an individual employee, while a group calendar or direct Microsoft connection may be more appropriate for operations teams that need broader visibility.

Built for policy variation

e-days offers global policy templates and localisation for languages and holidays, alongside strong reporting and an integration marketplace. That matters when employees work across UK nations or international locations. UK bank holidays aren't identical across the country, and the GOV.UK bank holiday listings show differences between England and Wales, Scotland and Northern Ireland. A location-aware platform is safer than applying one universal holiday list.

The drawback is implementation effort. Pricing is quote-based, and the setup is typically heavier than with a single-purpose SME planner. Feature depth can also be unnecessary if the only problem is replacing a shared spreadsheet.

For a growing organisation, however, that additional structure can prevent a later migration when policies, locations and reporting requirements become more complicated. Review e-days if calendar architecture and multi-location control matter as much as ease of initial adoption.

5. Breathe HR

Breathe HR is a UK-focused HR platform for SMEs that want holiday planning alongside a wider employee-management system. Its planner supports calendar synchronisation with Outlook, Google and iCal, so managers can keep daily availability visible while employee records and absence information sit in the same environment.

That broader context helps when the person approving leave also needs access to employee details, HR records or related administration. Breathe HR isn't just a calendar replacement, but it still keeps the holiday workflow approachable for smaller organisations that don't have a dedicated HR systems team.

The SME trade-off

Breathe HR's banded pricing is designed for smaller headcounts, and UK data hosting, support and guidance may reduce friction for UK buyers. The platform can therefore work well when the business wants to consolidate leave, employee information and everyday HR administration without moving straight to an enterprise suite.

Its limits appear when requirements become highly specialised. Advanced enterprise functionality is limited, and some integrations may require API or marketplace configuration. That means buyers should test the complete route from an approved request to the employee's calendar, rather than assuming every connection is equally direct.

For a company that needs a modest HR platform with a usable holiday planner, Breathe HR is a reasonable middle ground. For a team that only needs absence tracking and wants the least possible administration, a focused tool such as Timetastic may be easier to maintain. Explore Breathe HR with the rest of the HR requirements included in your decision.

6. CharlieHR

CharlieHR is a UK-native HR platform aimed at small teams and growing SMEs. Its Time Off module handles UK bank holidays, custom leave types, requests and calendar visibility, while iCal sharing lets employees and managers see absences in the calendars they already use.

The product makes sense when holiday planning is one part of a broader HR routine. Extras such as reviews, engagement and document management can keep a small people function from assembling several disconnected tools. Band-based pricing, rather than strictly per-user pricing, can also suit a growing team whose headcount changes within a pricing band.

Good for small-team HR coordination

CharlieHR's UK alignment and support are useful for businesses that want familiar local terminology and leave settings. Managers can configure the basics without adopting the complexity of a larger enterprise HR suite. That keeps the daily workflow clear: an employee submits time off, the appropriate manager reviews it, and the resulting absence becomes visible to the team.

The limitation is the same reason some teams like it. CharlieHR is lighter than enterprise HR software, and advanced workflows may require workarounds or additional integrations. Before committing, map unusual policies, multiple approval stages and payroll handoffs to the actual product workflow.

Manager's test: Submit a request as an employee, approve it as a line manager and then verify what appears in the relevant personal and team calendars. A polished demo won't reveal every handoff problem.

CharlieHR is a good shortlist candidate for startups and SMEs that want UK-focused HR plus time off, rather than a standalone planner. See CharlieHR for the current product scope.

7. Sage HR

Sage HR is a recognisable UK option for businesses that want modular HR and may already use Sage products. Its modules cover core HR, leave management, timesheets and shift scheduling, with additional options for performance and expenses. Leave requests can be submitted from a mobile app, and calendar synchronisation works through iCal, Google and Outlook.

The modular approach changes the buying question. Instead of asking whether Sage HR has every possible HR function, assess which modules the business will use and whether they connect cleanly to the existing payroll and scheduling processes.

Useful for a Sage-centred stack

Sage HR can work well alongside Sage 50 or Sage Payroll when the organisation wants a familiar UK-facing ecosystem. Time-off policies, approvals and mobile requests cover the core manager's day, while optional timesheets or shift scheduling can support more operational teams.

The trade-off is cost and complexity as the system expands. Pricing varies by selected modules, so the initial leave-management price won't necessarily represent the total cost of the stack. Feature depth is also mid-market and may not cover every advanced requirement of a larger organisation.

A careful trial should include a real approval route, a calendar feed and an export or payroll handoff. If those steps are smooth, Sage HR may be more valuable than a standalone planner because it creates a path to broader HR administration. Review Sage HR when existing Sage infrastructure is part of the decision.

8. Factorial HR

Factorial HR offers a modern HRIS with a UK presence, strong time-off management and a central company calendar. Approved leave and public holidays can be viewed together with company events, which helps managers distinguish a genuine staffing gap from a date that is already affected by a planned business activity.

Its native Outlook Calendar integration is designed to reflect approved leave and holidays directly in users' calendars. That's more convenient than asking employees to subscribe manually, but there's a detail worth testing before migration: the Outlook integration isn't retroactive, so new events appear going forward rather than automatically rebuilding all historical calendar entries.

A balanced HRIS for SMEs

Factorial supports custom time-off policies, approvals and reporting, giving HR teams more structure than a basic leave calendar. Its transparent GBP pricing for UK customers can also make initial budgeting simpler than a quote-only platform.

The product sits between a lightweight planner and a larger enterprise HR suite. It offers enough HR breadth for a growing SME without requiring the full implementation effort of a multinational system, although some advanced HR functions are still maturing compared with larger suites.

Use the trial to check employee records, policy rules, approval routing and the Outlook event behaviour together. A calendar connection that looks good in isolation may still create duplicate events or confusion if employees already maintain separate personal feeds. See Factorial HR for its current UK offering.

9. Personio

Personio is aimed at SMEs and upper-SMEs that need leave management as part of a wider European HR platform. It supports direct Microsoft and Google calendar integrations, with per-employee mapping for approved time off, and it also provides iCal subscription links for Google, Apple and Outlook calendars.

That gives IT teams several ways to approach calendar visibility. Direct push can suit organisations that want approved leave to appear automatically for mapped users, while iCal links may be easier for teams that prefer a subscription model or need a lower-touch connection.

When broader HR matters

Personio's modular apps extend beyond core HR into recruiting, performance and compensation. For an organisation building a more complete people operation, that breadth may justify the additional configuration involved in setting up a larger platform. Compliance orientation and European adoption also make it relevant to UK businesses managing structured HR processes across locations.

The cost is less predictable than a small standalone planner. Pricing is customized, scales with headcount and can increase as add-on apps are introduced. Configuration also takes more thought than a simple request-and-approval tool, particularly where departments use different calendars or approval structures.

Personio suits buyers who are deliberately choosing a broader HR foundation, not just looking for the quickest spreadsheet replacement. Test the mapping, approval and calendar behaviour with representative employee records before rollout. Visit Personio for the platform details.

10. BambooHR

BambooHR is a mature HR suite with a substantial Time Off function and a Who's Out calendar. It gives managers policy controls, approvals and reporting, while iCal feeds let staff and managers subscribe to absence calendars in Google Calendar or Outlook.

For a UK subsidiary of a wider organisation, familiarity and documentation can reduce the uncertainty of adopting an unfamiliar platform. The integration ecosystem and automation options, including connections through tools such as Zapier, also provide routes to deeper workflows when a simple calendar feed isn't enough.

Strong platform, heavier operating model

BambooHR's broader HRIS capability is both its main advantage and its main limitation. It can support more than holiday planning, but it also requires more setup and administration than a lightweight leave tool. Pricing and modules can add up as the organisation expands its requirements.

The Who's Out calendar is useful for a manager checking coverage, but subscription feeds still need testing in the team's actual calendar clients. Make sure employees understand which system controls the leave record and which calendar is only displaying it.

A business that needs recruiting, employee records and wider HR workflows may find BambooHR's scope appropriate. A small team that only needs leave approvals, balances and calendar visibility could be paying for capacity it won't use. Compare the platform with cloud-based holiday management systems before deciding, then review BambooHR directly.

Top 10 Staff Holiday Planners, Calendar Integration Comparison

Choose the Planner That Fits Your Working Day

The best choice isn't the platform with the longest feature list. It's the one that lets an employee request leave, lets the right manager approve it, updates the correct calendar, preserves an accurate balance and gives operations a dependable view of coverage. Those steps should work for routine holidays and less tidy cases, including part-time, irregular-hours and part-year staff.

Start with calendar synchronisation, but inspect how it works. A direct Outlook or Google connection may behave differently from an iCal subscription, and read-only feeds may refresh according to the calendar client. Ask whether approved leave appears automatically, whether changes and cancellations update cleanly, whether old events are handled, and whether payroll or HR systems can receive the data without another manual entry.

Approval controls deserve equal attention. The GOV.UK guidance on booking time off states that the general notice period is at least twice the length of the leave requested, plus one day. A useful system can flag notice issues before approval, route requests to the right manager and preserve the decision history.

Compare the operating fit

Use the following questions during trials:

• Leave-rule flexibility: Can the platform handle accruals, carryovers, custom leave types, different working patterns and location-specific bank holidays?
• Employee self-service: Can staff check balances, submit requests and use mobile access without returning to email or spreadsheets?
• Coverage visibility: Can a line manager see team, department and location calendars without exposing information that should remain private?
• Reporting and evidence: Can HR and finance export accurate leave records, balances and approval history for payroll, audits and planning?
• Support and implementation: Can your team configure the system without specialist IT help, and is support available when a policy behaves unexpectedly?

Pricing needs its own comparison. Per-user pricing can be straightforward for stable teams, while banded pricing may suit organisations growing within a headcount range. Modular pricing lets buyers start with leave and add HR functions later, but the total can rise as more modules become necessary. Quote-based pricing may reflect complex requirements, although it makes side-by-side budgeting harder until vendors provide a detailed proposal.

Move from a spreadsheet safely

Don't import a messy spreadsheet and hope the new platform fixes it. Use a controlled migration:

1. Audit the existing leave data: Identify duplicate employees, missing approvals, incorrect balances and historic entries that shouldn't be carried forward.
2. Define the policies: Record entitlement rules, carryovers, approval routes, bank holidays, working patterns and treatment of different leave types.
3. Clean employee records: Standardise names, email addresses, managers, departments, locations and working schedules before creating accounts.
4. Configure approval routes: Match the system to how managers make decisions, including delegated approvers and escalation points.
5. Test calendar feeds: Use ordinary leave, overlapping leave, changed dates and cancelled requests. Check both Outlook and Google where both are in use.
6. Communicate the change: Explain where employees request leave, where they check balances and which calendar is only a display.
7. Monitor the first leave cycle: Compare approved bookings, balances, calendar events and payroll outputs before retiring the spreadsheet completely.

UK employers should also plan for stronger record keeping. A new legal duty is scheduled to apply from 6 April 2026, requiring employers to keep adequate records of workers' annual leave and pay entitlements, as outlined in Littler's analysis of the UK record-keeping duty. That makes auditability more important than a visually attractive calendar.

For irregular or part-year workers, GOV.UK explains that entitlement can be calculated as 12.07% of hours worked in a pay period. The GOV.UK calculation guidance shows why a system must convert variable hours into an auditable balance rather than rely on spreadsheet estimates.

Finally, adoption affects the quality of the records. 60% of UK employees using overcomplicated IT systems would consider leaving their job, and 35% waste at least one hour per week on software-related issues, according to Workplace360 reporting. That supports a simple principle: fewer clicks, clear mobile access and dependable calendar updates are operational features, not cosmetic extras.

LeaveWizard is a strong option for small and mid-sized teams that need fast implementation, detailed leave control, live visibility and more flexibility than a basic calendar. A broader HR suite such as Breathe HR, Sage HR, Factorial HR, Personio or BambooHR is more appropriate when recruitment, performance, employee records or payroll integrations justify the additional configuration. The right decision comes from testing the complete working day, not selecting the platform with the most impressive feature page.