Your LGPS pension is a Defined Benefit pension - that means, you will be entitled to a certain amount each month for life. The exact amount is determined by how much you contributed. This is similar to what used to be known as a ‘final salary’ pension.
Everyone is allowed to take up to 25% of the value of their pension as a tax free lump sum. So, the whole of that lump sum is tax free.
For people who have a ‘defined contribution’ pension, it’s quite simple to work out - they know how much they have in their pot, and they can take a quarter of it.
For you, there will be a calculation (which your pension provider will do, you don’t have to do the maths!) to work out how much your pension is ‘worth’. That’s just a theoretical number, you’ll never see all that money in one go. But they do it for various reasons, including working out how much you can take as a tax free lump sum. You don’t have to take 25%, but if you do you won’t pay any tax on that.
Once you know those numbers, you can think about how you want to finance your retirement. Some people want a lump sum now to pay off their mortgage or something.
Other people prefer the security of knowing they will have a higher income for life. It’s totally up to you and your circumstances.
You should speak to Penions Wise and your provider - they should be helpful.