HR Software for UK Charities and Nonprofits

Charities and nonprofits face the same employment law obligations as commercial businesses — ERA 2025, PAYE, pension auto-enrolment, right to work — but with a set of additional characteristics: volunteers alongside paid staff, grant-funded roles with end dates, a workforce that is often motivated by mission rather than salary, and a board that typically wants assurance that administrative costs — including HR software — are proportionate.

For charities, the volunteer management distinction matters. Volunteers do not have employment rights — they are not workers and cannot bring unfair dismissal or unlawful deductions claims. But if a volunteer relationship looks too much like employment — regular hours, required attendance, financial benefit beyond expense reimbursement — it may be reclassified. Clear documentation of the volunteer agreement and the nature of the arrangement protects the organisation.

Mellow is priced on a per-employee basis — volunteers are not included in the count. For charities with small paid teams and large volunteer cohorts, this pricing model is cost-effective. The payroll engine handles the PAYE for paid staff, including those on fixed-term grant-funded contracts. When a grant-funded role ends, the system tracks the end date and prompts the appropriate HR process — which may be redundancy if the work genuinely ends, or redeployment if there are other openings.