Features
19 modules. AI built in.
Six countries.
The same complete HR platform everywhere — with payroll built natively for each country's tax rules, not adapted from somewhere else.
Do more with less
Treat people as capital to invest in, not headcount to manage
When hiring is frozen and everyone's asked to absorb more, Mellow turns the data it already holds into the things a leader actually needs to see.
Workforce Strain radar
Fuses capacity, wellbeing and retention into one read — who is overloaded AND hard to replace, before they burn out or leave.
Pocket coach for managers
Specific, humane nudges from live signals: protect a stretched key person, check in, invest where pay is below market — with the how.
What needs you today
One prioritised command surface across 14 areas — approvals, strain, right-to-work, pensions, reviews, tribunal risk — so nothing is missed.
Market pay (ONS ASHE)
See how each person sits against the official market range for their role — spot quiet flight risks before they become resignations.
Restructure & redundancy
Run a fair, legal process end to end — consultation thresholds, fair selection, statutory pay, at-risk and notice letters, tribunal-risk built in.
Open REST API & webhooks
Connect Mellow to your stack — accounting, finance, BI and bespoke tools. Payroll exports straight to Xero/QuickBooks.
Global — every country
19 modules, the same everywhere
Every team, in every country, gets the whole platform. Only the payroll tax rules change by country.
Foundation HR — records, absence, compliance, onboarding.
Employee Records
Complete employee lifecycle management with documents, employment history, and compliance tracking.
- Full employment timeline
- Document storage & policy acknowledgements
- Right to work verification
- Org chart (interactive)
- Emergency contacts
Absence & Leave
Holiday management, sick leave, statutory leave — all calculated correctly under UK law.
- Holiday allowance & accrual
- Bradford Factor automation
- SMP, SPP, SSP calculations
- TOIL tracking
- Holiday pay for irregular hours
Compliance Hub
Automated ERA 2025 compliance monitoring. Know your obligations before they become breaches.
- ERA 2025 changes tracked and built in
- Right to work alerts
- Visa expiry tracking
- Contract compliance scoring
- GDPR data subject requests
Onboarding & Offboarding
Structured onboarding workflows that ensure every new starter is set up compliantly from day one.
- Configurable onboarding templates
- Day-one rights tracking (SSP & family leave)
- Equipment provisioning tasks
- IT access coordination
- Offboarding & final pay calculation
Full payroll engine included — six countries, no per-country fees.
Payroll Engine
Full UK payroll processing with PAYE, National Insurance, statutory pay and BACS — calculated to the penny, with a ready-to-file output (filing pack). Mellow prepares everything; the filing itself stays with you.
- PAYE & NI calculation to the penny
- Ready-to-file payroll output (filing pack)
- BACS payment file generation
- P60, P45, P11D production
- Director NI (annual method)
- Student loan & attachment of earnings
Pensions & Benefits
Auto-enrolment management with full TPR compliance and flexible benefits administration.
- Auto-enrolment eligibility assessment
- Pension contribution calculations
- Opt-out & re-enrolment management
- Salary sacrifice schemes
- Flexible benefits portal
Flexible Working
Manage flexible working requests under the ERA 2025 day-one right to request.
- Day-one flexible working requests
- Statutory 2-month decision timeline
- Trial arrangements tracking
- Business reason documentation
Time & Attendance
Time tracking with WTR compliance built in — 48-hour limit alerts, rest period monitoring.
- Clock in/out with GPS
- Timesheet approval workflows
- 48-hour WTR monitoring
- Zero-hours pattern tracking
- Guaranteed hours calculation
Contractors, performance, recruitment, workforce planning, plus computed predictive-compliance and tribunal-risk engines and their AI assistants.
Contractor & IR35
IR35 status determination with CEST-parity accuracy and HMRC audit-ready documentation.
- CEST-parity determination engine
- UK case law reasoning
- Inside/outside IR35 workflow
- HMRC audit trail
- Contractor payment management
Performance & Reviews
Structured performance management from probation through to senior reviews.
- Probation period management
- Performance improvement plans (PIPs)
- 360-degree feedback
- Calibration sessions
- Development planning
Recruitment (ATS)
Applicant tracking from job posting through to offer letter and onboarding handoff.
- Multi-channel job posting
- Application pipeline management
- Interview scheduling
- Right to work pre-checks
- Offer letter generation
Workforce Planning
Headcount modelling, scenario planning, and cost forecasting for growing teams.
- Headcount scenario modelling
- Cost forecasting
- Succession planning
- Skills gap analysis
- Org structure visualisation
Predictive Compliance
Computed compliance risk scoring — identify issues before they become breaches.
- Proactive compliance risk scoring
- Legislative change monitoring
- Audit readiness assessment
- Recommended actions engine
Tribunal Risk
Employment tribunal risk assessment across your workforce and ER cases.
- Real-time tribunal risk scoring
- Case outcome prediction
- Settlement vs contest guidance
- Documentation completeness check
The AI People Coach, adjustments passport, informal conflict coaching, computed WorkloadSense and pay-equity insight, and wellbeing.
Employee Wellbeing
Pulse surveys, wellbeing scoring, and recognition tools that make people feel valued.
- Pulse survey automation
- eNPS tracking
- Wellbeing score dashboards
- Peer recognition & kudos
- "Keep Britain Working" metrics
Compensation
Benchmarking, pay review workflows, and total compensation visibility.
- Market benchmarking integration
- Pay review cycle management
- Total reward statements
- Bonus & commission management
Employee Relations
ER case management, tribunal-risk scoring, adjustments passport and informal conflict coaching — resolve tension before it becomes a formal case.
- Grievance & disciplinary cases
- Adjustments Passport — living record of agreed workplace adjustments, per-country legislation
- Informal conflict coaching at the top of the ER funnel (People Coach)
- ACAS compliance checklist & tribunal risk pack
- Fire-and-rehire pattern detection
- Whistleblowing channel
Pay Equity
Gender and ethnicity pay gap analysis with GPG reporting readiness built in.
- Gender pay gap reporting
- Ethnicity pay gap analysis
- Pay band structure analysis
- GPG narrative generation
WorkloadSense
Burnout prevention engine that identifies overloaded teams before they break.
- Workload pressure scoring
- Burnout risk predictions
- Team capacity visualisation
- Manager intervention triggers
Country by country
Payroll built for each country
Every country's tax authority, rates and filing rules are built into the engine and verified against official sources.
United Kingdom
Tax authority: HMRC
From £4 / employee / month
What's included
- PAYE & National Insurance
- RTI — direct to HMRC
- Auto-enrolment pension
- ERA 2025 compliance
Submission
The Employment Rights Act 2025 — the changes that affect you, mapped into the platform and monitored.
Ireland
Tax authority: Revenue
From €5 / employee / month
What's included
- Income tax & USC
- PRSI
- Real-time ROS reporting
- My Future Fund pension
Submission
PAYE Modernisation — PAYE, PRSI and USC computed, with your Revenue (ROS) submission figures prepared for every pay date.
United States
Tax authority: IRS
From $5 / employee / month
What's included
- Federal + 8 state taxes
- FICA & FUTA
- W-4 withholding
- 401(k)
Submission
Federal + state income tax and FICA computed accurately — your Form 941 and state withholding figures prepared on every pay run.
United Arab Emirates
Tax authority: MOHRE
From AED 19 / employee / month
What's included
- Zero personal income tax
- WPS salary file generation
- GPSSA pension
- End-of-service gratuity
Submission
Wage Protection System — salary files generated and ready for your bank.
India
Tax authority: Income Tax Department
From ₹420 / employee / month
What's included
- TDS — new regime
- EPF provident fund
- ESI
- Professional tax
Submission
TDS, EPF and ESI — calculated to the rupee and ready to file.
Australia
Tax authority: ATO
From A$8 / employee / month
What's included
- PAYG income tax
- Medicare Levy
- HECS-HELP
- Superannuation
- Single Touch Payroll
Submission
Single Touch Payroll — PAYG, Medicare Levy and Superannuation computed, with your STP figures prepared for the ATO on every pay run.
Intelligence
AI assistants that answer and act
Each assistant knows the employment law of the country you operate in — and doesn’t just answer. It drafts documents, starts workflows and produces audit-ready output, and explains the figures Mellow computes.
Mellow computes the numbers — from your data and the legislation, never guessed. The AI is how you ask it questions and how it explains itself; it never invents a figure.
Seven AI assistants that work alongside your team
Employee Experience Agent
Answers HR questions and takes action — entitlements, onboarding, and generating employee documents — for whichever of the six countries they work in.
“How much annual leave am I entitled to?”
Generate an employment contract for our new developer in California
Payroll Intelligence Agent
Explains payslip calculations and runs the numbers — UK PAYE, US state tax, Irish USC — and estimates the real cost of a hire.
“Why is my California state tax different this month?”
Estimate the total cost of hiring 3 engineers in Ireland
Employment Law Agent
Employment-law guidance across all six countries — and it can start the process and produce the paperwork.
“What's the notice period for an employee in India with 2 years' service?”
Start a disciplinary process and generate the ACAS timeline
IR35 & Contractor Agent
Runs contractor-status assessments — UK IR35, US W-2 vs 1099, local classification — and produces the determination.
“Is this contractor inside or outside IR35?”
Run a contractor classification assessment and produce the determination
Pension & Benefits Agent
Guides retirement-scheme decisions — UK auto-enrolment, US 401(k), Australian super, India PF — and runs the assessments and letters.
“What's the current superannuation rate in Australia?”
Run auto-enrolment assessment and generate enrolment letters
Immigration & Right to Work Agent
Monitors work-visa expiry and right-to-work checks across countries — and builds the action plan when a deadline looms.
“This employee's work visa expires next month — what do we do?”
Generate a visa expiry action plan with renewal deadlines
People Coach
Coaches managers through conflict, team dynamics and leadership — grounded in established frameworks and your own workload, wellbeing and case data, not generic tips.
“Two of my team keep clashing in meetings — how do I handle it before it becomes a grievance?”
Give interest-based, framework-grounded coaching to resolve it informally — and flag when it must go to the formal process
Five computed engines that keep you compliant
Predictive Compliance Engine
Continuously monitors your workforce data to predict compliance risks before they become breaches.
Generates a 12-month compliance calendar with every deadline for your country
Tribunal Risk Calculator
Computes a risk score for every ER case and dismissal against the country’s dispute system — a computed score with a plain-English AI explanation, never a guessed number.
Computes a risk score for every ER case and produces a report with settlement range and procedural gaps — computed scoring, AI-written explanation
WorkloadSense Engine
Analyses workload patterns across your teams to detect burnout risk and trigger manager alerts.
Produces team workload reports and flags burnout risk before people break
Data Integrity Agent
Audits employee records, payroll inputs and contracts for inconsistencies before they reach the tax authority.
Runs data quality audits — flags missing NI numbers, expired documents, invalid records
Onboarding Orchestrator
Coordinates the entire new-starter journey across countries — without anyone having to chase.
Creates personalised onboarding plans — assigns tasks to HR, IT, manager, and the new starter
What your agents can do
Ask in plain English. The agent collects what it needs, shows you a preview, and produces the document or result — you approve before anything is issued.
Employment contracts
Employee Assistant
Offer letters
Employee Assistant
Onboarding plans
Employee Assistant
Adjustments passport wording
People Coach
Informal conflict coaching
People Coach
Disciplinary timelines (ACAS)
Employment Law Advisor
Grievance responses
Employment Law Advisor
Settlement agreements
Employment Law Advisor
Flexible-working responses
Employment Law Advisor
Hiring-cost estimates
Payroll Intelligence
Multi-country pay comparisons
Payroll Intelligence
Redundancy calculations
Payroll Intelligence
IR35 / SDS determinations
Contractor & Status Advisor
Contractor agreements
Contractor & Status Advisor
Auto-enrolment assessments & letters
Pensions & Benefits Assistant
Right-to-work records & evidence
Right to Work & Immigration Advisor
Compliance calendars
Predictive Compliance
Tribunal risk packs
Tribunal Risk Calculator
At-risk & redundancy letters
Employment Law Advisor
Performance review summaries
Mellow
Workforce plans
Mellow
Gender pay gap reports
Compliance Engine
PDF payslips, P45s & P60s
Payroll Intelligence
Accounting journals (Xero/QuickBooks)
Payroll Intelligence
Data-quality audits
Data Integrity
Common questions
- Does Mellow integrate with other tools?
- Yes. Mellow has a full public REST API and webhooks, so it connects to your stack — accounting, finance, BI and bespoke tools. Direct app integrations are on the roadmap; the API and webhooks are available today (see the Developers page).
- How does Mellow work?
- Mellow is one platform built around a single record of each employee. You run payroll (native in the UK, Ireland, USA, UAE, India and Australia), and manage absence, onboarding, compliance and benefits in the same place — while AI assistants draft documents, answer questions and explain the figures Mellow computes. The numbers come from your data and the legislation, never guessed. Update someone once and payroll, pensions, leave and reporting all stay in step.
- Which countries does Mellow support?
- Mellow provides native payroll and local compliance for six countries: the United Kingdom, Ireland, the USA, the UAE, India and Australia — each with its own tax rules built in, not a UK product stretched to fit.
- Does Mellow file payroll with HMRC?
- Mellow calculates UK PAYE, National Insurance and RTI to the penny and produces a ready-to-file Full Payment Submission and Employer Payment Summary. You file via the Government Gateway — the same filing-pack model Mellow uses across all six countries.