Start with the risks that change cashflow
- Lower investment returns, especially early in retirement.
- Higher spending or a large one-off cost.
- Retiring earlier than planned.
- State Pension or other income starting later than expected.
- Lower part-time, rental or business income.
- Downsizing proceeds arriving later or being smaller.
Change one thing at a time
If you change everything at once, it becomes hard to see what caused the result to move. Test one lever first: retire two years earlier, increase spending, remove a future income stream or use the conservative scenario.
Look for plans that are fragile
A fragile plan only works if investment returns are strong, spending stays low and every future income arrives exactly on time. A more resilient plan has room for some things to disappoint without immediately creating a shortfall.
Use RetirementInSight as a scenario notebook
Run a base version first, then save the assumptions outside the site and test alternatives. The calculator does not save your data, so keep your own notes on which changes made the biggest difference.
Common questions
Is a conservative scenario a worst case?
No. It is a weaker deterministic assumption, not the worst possible outcome. Real markets and personal circumstances can be better or worse.
Related reading
Sources and last reviewed
Page reviewed 2026-08-21. Source links below show when each reference was last checked.
- Check your State Pension forecast (GOV.UK, last checked 2026-08-20)
- Check your State Pension age (GOV.UK, last checked 2026-08-20)
- Inflation and the 2% target (Bank of England, last checked 2026-08-18)
- When you can take money from your pension pot (GOV.UK / MoneyHelper, last checked 2026-08-19)