Asked for a pay rise, his long should it take?

[Longdistance]

Sounds like a strange question, but, my job description has changed and I’m doing someone else’s job who hasn’t been replaced as muggings here is doing her job.
I have a meeting coming up this week to discuss my job description, my change of hours and I’m hoping, my request for a raise.
I put my request in to change my hours in May last year and didn’t get my answer straight away, in fact they took 6 months to grant it 🙄
I consider myself a really good employee, rarely taking time off sick, I do my job very well, I keep my head down and of course I am doing someone else’s job on top of what I am originally paid to do.
I’ve listed all the extra stuff I am doing, my manager hasn’t acknowledged this list, so far, I have had no reply and this was sent two weeks ago upon their request.
How long should I wait for them to say yay or nay?
They already took 6 months on deciding my hours, I’m not waiting that long. The person who’s job I’m doing left last year and she was furloughed for the entire Covid time and I had been doing her work since.

There is no "should".

If you have a meeting this week then presumably you plan to bring it up then, presumably you're not planning to chase yet? Or are you needing an answer before the meeting, which is then a perfect chance to follow up - "Hi, just checking you'll get back to me before Tuesday so we have a chance to discuss properly on Wednesday."

And then in the meeting, ask for a timeline; and if you don't get one, set one. "Oh ok, I get that you can't predict that but I'll follow up with you in 2 weeks if I haven't heard so you can update me."

But there's nothing to stop them ignoring you/prevaricating forever if they choose, there are no rules around it...

Thanks for the reply. I did resend the message saying has this been looked at? My manager said that as I was doing someone else’s job that is something he could help me with.
The list of extra duties was upon his request. List them over a week and send him a copy, so I’m a bit disgruntled that when I sent the list he has not acknowledged my email. Just a ‘thanks for this’ would’ve been nice.

How long should you wait before you…do what? What will you do if they either say no or don’t get back to you within a certain timeframe? Resign? Start looking elsewhere?

It’s really up to you how long you wait, but I would recommend deciding on a timescale and deciding on your next action.

If you're already doing the increased role and they haven't already agreed to a pay increase, then it's quite possible they will drag their feet. Unless they're a model employer, there isn't much impetus for them to act as the status quo benefits them.

I think if you really want the pay increase and are happy to force their hand, then I'd explain you were willing to take on the extra responsibilities on the basis that it would lead to a pay increase. As that hasn't materialised, then as of X date you cannot take on the extra work without compensation. Every organisation will act at a different pace, I think you need to personally decide how much longer you're happy to work with no increase.

I had my meeting today and was assured there was going to be a pay rise and my senior manager and hr agreed I should be paid for taking on this other persons role as well as doing my original job.
I’m just waiting on the figure and as I took on the responsibility of this role I will be remunerated for it. Otherwise I will be finding another job.
I outlined that it would be very difficult to go to my original hours as the work wouldn’t get done in time and then they’ll have a problem on their hands as they’d have to find someone else to do the other job I’m not contracted to do.
They got rid of the last person partially to do with sickness and she was ‘retiring’.