What is the real value of a defined benefit scheme - how to plan

FIRSTTIMER

I currently accrue around £1000 a year in accrued pension per year in civil service pension. Its current accrued annual value is around £3500 per annum.

How do I calculate what this will give in say 20 years?
Based on accruing £1000 a year and an annual increase of cpi +1.6

Is it just a case of using a compound interest calculator online with a base of £3500 and annual increments of £1000 with interest of approx 3% yearly.

Such as this one?

https://www.thecalculatorsite.com/finance/calculators/compoundinterestcalculator.php

Dazed_and_confused

Have you tried this,

https://www.civilservicepensionscheme.org.uk/members/modeller/

hugheskevi

Based on accruing £1000 a year and an annual increase of cpi +1.6

Where does the reference to cpi + 1.6% come from? Both in-service and deferred member revaluation of accrued Civil Service nuvos and alpha pension is CPI, unless you transferred in service from another public service pension scheme.

Is it just a case of using a compound interest calculator online with a base of £3500 and annual increments of £1000 with interest of approx 3% yearly.

Where does 3% come from? Is that your expectation of future CPI?

It is usually easier just to work in constant price terms (ie ignore inflation increases), as although the pension is higher due to inflation, so is the general level of prices.