Holiday calculation - who is correct?

[bookreaderonkindle]

We have a new manager started who calculates holiday different to me. He says I have been doing it wrong.
We offer 5 weeks holiday (plus BH) pro rata for part timers.
For example for a staff member who works 27 hrs pw over 3 days

My calculation is 27 x 5weeks = 135 hours annual leave. Plus BH
His calculation is that three days is 60% of the working week (each day mon-Fri is 20% therefore 3 days = 60%). So 60% of 37.5 (FT hours) is 22.5 x 5 weeks =112.50 hours

Is he correct?

The manager says all our staff have been worked out incorrectly. So I'm glad that almost all of you think my way is correct.
As mentioned I have always followed the government guidance so I will draw his attention to that again.

I would do. You don’t want a claim for unlawful deduction of wages. Which is exactly what will happen if staff don’t get to either take or be paid for their full entitlement.

Of course he has told the owners of the company and they want to go with his figures (of course they do)!
I'm not sure how they will go about telling long serving staff that their entitlement has changed.

His calculations are based on 7.5 hour days x 5

You work 9 hour days x 3

He can just calculate it in % of days as your length of days are different

You are correct x

He's wrong because 27 is not 60% of 37.5.

@bookreaderonkindle This is the calculation I use to show an absolutely fair method. I hope the image is readable.

He's only correct if nobody said the worker could compress hours to do 9 hours a day for 3 days per week to complete 27 hours.

If the employee is contacted for 22.5 hours, then yes it's 60%. But if they're supposed to be working 27/37.5, it's obviously 72%.

and then you can explain that they are opening themselves up to an employment tribunal for failure to pay statutory minimum holidays and for detrimental treatment for part-time work. 🙂

In my company it would be:
number of hours per week contracted to work / full time hours = FTE equivalent (eg. 0.72 fte if working a 27hr week) and then use that to calculate the pro rata annual leave
So 0.72 x 187.5hrs = 135hrs

Same as other posters have said.

Plus potentially sex discrimination if she’s part time due to child care responsibilities … as it’s widely accepted at tribunal that women carry the bulk of childcare responsibilities and are more likely to work part time hours due to this ….

As soon as a part timer is working different day lengths to the full time equivalent you have to do the calculation in hours.

I'm in a similar position to the example as I do 3 days of 8 hours each. That's .65 of full time and not .6.

Thanks everyone. I was doubting myself. Not sure ifs a man thing 😬 of being absolutely certain that you are right.
But I now feel confident I can put across that I am right after all.