See how dynamic withdrawal rules protect your portfolio — and when they trigger
The Guyton-Klinger strategy adjusts your withdrawals based on how your portfolio is performing. Unlike a fixed 4% rule, it uses guardrails — automatic rules that cut or increase spending to keep the portfolio on track. Upper guardrail triggered = cut spending 10%. Lower guardrail triggered = increase spending 10%.
⚠ Upper guardrail
Current withdrawal rate rises 20% above initial rate → cut withdrawals by 10%. No inflation adjustment this year.
✓ On track
Current withdrawal rate is within 20% of the initial rate. Positive return year → inflation adjustment applied normally. Negative return year → withdrawal stays flat, no inflation adjustment.
↑ Lower guardrail
Current withdrawal rate falls 20% below initial rate → increase withdrawals by 10%. No inflation adjustment this year.
Portfolio inputs
$
%
%
%
How returns are generated: Each time you run the simulation, a completely new set of annual returns is randomly generated using a normal distribution — mean equal to your average return input, standard deviation of 15%. No two runs will be identical. This is intentional: it reflects the reality that no one knows what sequence of returns they will actually experience in retirement. Run it multiple times to see the range of possible outcomes.
Portfolio balance & withdrawals over time
Portfolio balanceAnnual withdrawal
Year-by-year detail
Year
Return
Beginning balance
Withdrawal (Jan 1)
Ending balance
Withdrawal rate
Next year's withdrawal
Reason
This tool is for educational and illustrative purposes only and does not constitute financial advice. Each simulation run generates a unique, randomly distributed set of annual returns (mean = your average return input, standard deviation = 15%). Results will differ every time you run it — this is intentional, as it reflects real-world uncertainty. Guardrail rules follow the original Guyton-Klinger framework: upper guardrail at 120% of initial rate (cut 10%), lower guardrail at 80% of initial rate (increase 10%), and no inflation adjustment in negative return years. Actual results will vary. Consult a qualified financial advisor before making retirement decisions.