How to calculate pro rata salary
Pro rata pay is the full-time salary multiplied by your share of full-time hours or days. Take a £30,000 full-time role at 37.5 hours a week. If you work 22.5 hours, your fraction is 22.5 ÷ 37.5 = 0.6, so your pro rata salary is £18,000. You can work it out three ways, by hours per week, by days per week, or by the weeks you work across a year, and they all come to the same thing.
Pro rata holiday entitlement
Part-time workers are entitled to the same 5.6 weeks of statutory paid holiday as full-time staff, pro-rated to the days they work. The rule is days worked per week × 5.6, capped at 28 days. So three days a week gives at least 16.8 days a year, and four days gives 22.4. Your contract may offer more, and whether bank holidays count toward this varies by employer, so treat the figure as the statutory floor.
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Simon is the founder of Orbit Money, a tool that helps people track subscriptions and recurring spend. He builds Orbit's free money calculators and writes about personal finance for UK and Australian readers.
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