@UpsideTango
To answer your questions...
The annual cap on adding to a pension is £60,000 and you can use any unused from the last three years up to your annual salary.
It is known as the 'annual allowance' and is the most you can pay into a pension before you have to pay tax on the contributions. It is £60,000 per year and you can use the previous years unused allowance as 'carry forward. BUT only once you have used up this year's allowance.
And the second important part is you can only contribute up to the maximum of your annual salary
But what if you earn say £20k pa.
You can only contribute a maximum of £20,000, so therfore can't use any carry forward
If last three years allowance is unused does that mean you can put in £60k (and get the tax relief) or only £20k?
Nope on £20k
Also, the cap, does it include everything you have added (via salary) AND what your employer has added - or is it just your own contributions?
The annual allowance covers all pension contributions
@Badbadbunny says
"But be very careful with income if only £20k. You'd get basic rate tax relief if it's a private pension where HMRC pay in the deemed Basic rate tax relief, but otherwise, if you're going to have to claim relief via your tax return, it will be limited to how much income tax you've paid. So on a wage of £20k, you only pay income tax on £7.5k, so you've no tax relief to claim on any pension payments over £7.5k."
This is not correct for personal pensions - you get tax relief on all your contributions. Most personal pensions get 'relief at source' which means the tax is automatically credited to the pension at the basic rate. So if you wanted to pay £20,000 into a personal pension, you'd actually contribute £16,000 and the scheme would automatically credit £4,000