National insurance contribution

Tab718

So I’m confused after Martins call to arms to check the state pension pot.  

I retired at 55 in Jan 2015. When I checked last night it said I had 40 yrs full contributions but the last 6 yrs ( since I retired ) I haven’t paid enough in. 

It said at 2015 my pension would be £155 pw. Then it says my projected pension is £171 pw. Maximum being £185 pw.
 Each of those six year it says it would cost £800 to top up. 

1.  Does that mean it wants me to pay 6 yrs worth of £800, or do I buy just one.
2. Which pension projection am I going to get, the £155 or the £171.
3. Is it worth Me buying any at all, I’m 63 in Feb. 

Really confused now ( which isn’t hard to do to be fair )

molerat

Your pension forecast will give several amounts

A top line figure of what you can achieve going forward

A figure of amount accrued as at April 2022 (or maybe still at April 2021 but the amount will be at 2022 values)

A maximum you can achieve.

The important one is the up to April 2022, that is what you currently have and what you can top up from.  Each £800ish spent on buying a year will  increase your pension by £5.29 per week.

What are those numbers including the pence ?