Retirement Planner — Sliders, Live Graph & Inflation

Adjust savings, age, returns, inflation, and retirement spending. Private by design—everything runs locally in your browser.

Inputs

Results

Projected pot at retirement (nominal):
Projected pot at retirement (today’s money):
Suggested sustainable withdrawal (rule of thumb): (annual, ~4% of pot)
Plan verdict:
Results are estimates, not financial advice. Consider taxes, fees, and changing market conditions.

How the Planner Works (Overview)

We compound monthly. Before retirement, the pot grows with investment returns and your contributions. At retirement, we switch to your in-retirement return and subtract your planned monthly spending. We show both nominal balances and an estimate in today’s money (inflation-adjusted).

  • Pre-retirement growth (monthly): FV = P₀(1+r)ⁿ + PMT·((1+r)ⁿ−1)/r
  • Inflation adjustment: divide by (1+i)ʸ to estimate “today’s money”.
  • Depletion check: if balance goes below £0 during retirement, we show the year of depletion.

Understanding Retirement Planning

Retirement planning prepares your finances for life after full-time work. Save consistently, invest wisely, and spend sustainably during retirement.

Key Factors That Influence Your Retirement

  • Starting age: the earlier you begin, the more compounding helps.
  • Retirement age: later retirement = more contributions, fewer drawdown years.
  • Current savings & contributions: your base and ongoing fuel.
  • Investment returns & inflation: crucial assumptions that shape outcomes.
  • Spending needs: housing, healthcare, and lifestyle drive drawdown.

Rules of Thumb vs. Personal Plans

The “4% rule” is a rough guide for ~30 years; real-world sustainability varies with markets, fees, taxes, and longevity.

Disclaimer: Educational only—not financial advice. Consider professional guidance.

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