Calculate your retirement funding level by age or spending, comparing savings to age benchmarks or a withdrawal-rate target based on current savings.

Retirement Funding Level Calculator

Pick how you want to check: against a benchmark for your age, or against a target based on your spending.
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Retirement Funding Level (Percent Funded) Formula

The following equations estimate how funded you are toward a retirement “target” using a simple rule of thumb (commonly 25× annual spending). This is not a true probability-of-success calculation (which typically requires Monte Carlo simulation or similar modeling).

\text{Percent Funded} = \left(\frac{S}{R}\right)\times 100
R = A \times 25
  • Where S is total savings ($)
  • A is annual retirement spending ($/year)
  • R is the rule-of-thumb required retirement funds (target nest egg) ($)

To estimate your percent funded, divide your total savings by your estimated required retirement funds, then multiply by 100. A common starting estimate for required funds is 25× annual spending (the “4% rule” guideline), though the right target can vary by risk tolerance, time horizon, taxes, and market conditions.

What is a Retirement “Probability of Success”?

Definition:

In retirement planning, “probability of success” usually means the estimated likelihood that a portfolio will last through retirement given assumptions about investment returns, inflation, withdrawals, taxes, and longevity—often estimated with Monte Carlo simulation. This page’s calculator instead provides a simple percent-funded estimate toward a rule-of-thumb target.

How to Calculate Percent Funded Toward a Retirement Target

Example Problem:

The following example outlines the steps and information needed to calculate a simple retirement funding percentage.

First, determine your total retirement savings. In this example, the savings are $500,000.

Next, determine the estimated required retirement funds (your target). Suppose your target is $1,000,000.

Finally, calculate your percent funded using the formula above:

Percent Funded = (S / R) × 100

Percent Funded = ($500,000 / $1,000,000) × 100

Percent Funded = 50%

FAQ

How accurate is this type of calculation?

This calculator provides a simple rule-of-thumb funding estimate (based on a target such as 25× annual spending). It does not model market variability, inflation, taxes, changing spending, or longevity. For a true “probability of success,” use a Monte Carlo-style retirement model.

What factors influence my retirement success?

Key factors include total savings, spending level, withdrawal rate, investment mix and performance, inflation, taxes, healthcare costs, lifestyle choices, and longevity. These are the inputs typically used in more advanced retirement probability models.

How can I improve my retirement outlook?

Strategies can include increasing savings, reducing expenses, adjusting your withdrawal rate, diversifying investments, building flexibility into spending, and delaying retirement. Regularly reviewing and updating your plan as circumstances change can also help.