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Your retirement number: How much do you really need?

by | Dec 4, 2025

For many people, retirement planning feels overwhelming. The numbers seem large, the choices confusing, and the future uncertain. But one question unlocks the rest: What income do I need to live the life I want? This is what advisers sometimes call your “retirement number.” Rather than focusing solely on the value of your pension pot, this approach starts with lifestyle and works backwards—a more practical, client-friendly way to plan.
  1. Understanding Your Lifestyle Costs

The best retirement plans start with your actual spending. Consider essential costs—housing, utilities, food, travel—alongside discretionary expenses such as holidays, hobbies, family support, and health or care planning. A good rule of thumb is to break these into three categories: “must-haves,” “nice-to-haves,” and “aspirations.”

This helps shape an income target that feels realistic, not speculative. Many clients find that simply writing these figures down provides clarity and confidence.

 

  1. Mapping Your Income Sources

Most retirees have a mix of income sources. These can include:

  • Workplace pensions
  • Personal pensions
  • Defined benefit schemes
  • ISAs and investment portfolios
  • The State Pension
  • Savings or rental income

The challenge is understanding how reliable each source is, how long it may last, and how it interacts with the others. For example, investment assets may be used earlier while waiting for a defined benefit pension or the State Pension to begin. A structured plan helps sequence these decisions.

 

  1. Determining Sustainable Withdrawals

A common question is how much you can safely withdraw each year. While the idea of a 3–4% withdrawal rate is a helpful starting point, it is not a rule. Inflation, life expectancy, market returns and personal circumstances all play a role. The key is ensuring withdrawals are reviewed regularly and adjusted if circumstances or markets change.

 

  1. Stress-Testing Your Plan

A robust retirement strategy looks at different scenarios: lower returns, higher inflation, unexpected costs, or living longer than anticipated. By modelling several outcomes, advisers can help ensure the income strategy remains resilient.

 

Why This Matters

Knowing your retirement number turns a daunting question into a manageable plan. It provides peace of mind and transforms retirement planning from guesswork into structured decision-making.

At GSI, our planning approach helps clients connect their lifestyle goals with their financial strategy—ensuring that retirement is not only affordable, but enjoyable and sustainable.

 

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