Hello OP, you asked a few questions about how much to put into your pension via salary sacrifice. All depends really on how old you are (how long you have to pay in and let it grow), how much you have in your pension pot already, how much you ideally want in there, how much you can afford, how much your employer contributes etc.
We are a x1 high earner family, and SAHM. So there’s more pressure to put into the pension to save for both of us. After moving house and having babies we got the pension statement one day and realised there was so little in the pot. Under 20k. Given my partner had been paying in for years, we realised his contribution (I think about 5%, and his employers, only 3%) was never going to be enough to retire.
His earnings have gone up a lot since and we have dramatically increased our pension contributions (via salary sacrifice) to avoid the 60% tax trap. We also want to retire early (I will be going back to work asap).
Given that 100k in a pension pot will give you about 4k return a year, we’ll be aiming for at least 500k in there. The general rule is take the age that you start paying into your pension, halve it, and that’s the total percentage contributions you should be paying in (employer and employee combined). But again, depends on what you can afford, when you want to retire, if you are rely on inheritance etc. we can’t so need to work on this now. Also, you can currently withdraw 25% at 57 tax free so huge tax incentive. We will pay off the mortgage and given a deposit to children. You will pay tax though when you get an income from it.
Also, be careful to fly too close to the 100k limit. If you only put in a couple of percent, and hover at the end of 90k, then get a pay rise or bonus you will go over 100k, have to do a tax return and lose free childcare etc
If you do end up doing a tax return, I recommend doing that straight after the tax year ending in April- (once you have a P11D this could be July) this will give you enough time to save the money if you owe any back (due the following Jan)