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Kitces Ratcheting

Start with a conservative withdrawal, then permanently increase your spending whenever your portfolio reaches a new inflation-adjusted high — spending only goes up, never down.

How It Works​

The Ratcheting method is built on a simple psychological insight: retirees can tolerate flat spending, and they love spending increases, but they deeply dislike spending cuts. So this method eliminates cuts entirely.

You begin retirement with a conservative withdrawal rate (typically around 4% of the initial portfolio). Each year, you adjust your withdrawal for inflation to maintain purchasing power. Then you check whether the portfolio has grown beyond its previous inflation-adjusted high by a meaningful margin (the ratchet threshold). If it has, you permanently increase your real spending to reflect the new, higher portfolio level. If it hasn't, you simply keep spending at the current level.

The key word is "permanently." Once spending ratchets up, it never ratchets back down. This means the method is inherently conservative — it needs a significant cushion before triggering a raise, because that raise is irreversible. The tradeoff is that you may underspend in the early years of retirement while waiting for the portfolio to grow enough to trigger the first ratchet. But when good markets arrive, you get to lock in a higher standard of living for the rest of retirement.

The Formula​

Year 1:

withdrawal = initialPortfolio × initialRate
highWaterMark = initialPortfolio

Year 2+:

baseWithdrawal = currentWithdrawal × (1 + inflationRate)

adjustedHighWaterMark = highWaterMark × cumulativeInflation

if currentPortfolio > adjustedHighWaterMark × (1 + ratchetThreshold):
    withdrawal = currentPortfolio × initialRate
    highWaterMark = currentPortfolio / cumulativeInflation
else:
    withdrawal = baseWithdrawal

Key parameters:

  • Initial rate: 4%
  • Ratchet threshold: 10-20% above the inflation-adjusted high-water mark (commonly 10%)

Pros & Cons​

Advantages:

  • Spending only goes up or stays flat — never decreases in real terms
  • Captures portfolio growth and locks it in permanently
  • Strong psychological comfort — no anxiety about future spending cuts
  • Simple decision rule: did the portfolio hit a new high?

Limitations:

  • May underspend significantly in early retirement years
  • Requires substantial portfolio growth to trigger each ratchet
  • Conservative start means potentially leaving money on the table
  • If a ratchet triggers near a market peak, the higher spending is locked in even as the portfolio falls

Example​

Starting portfolio: $1,000,000 | Initial rate: 4% | Ratchet threshold: 10%

YearPortfolioInflation-Adj HighThresholdRatchet?Withdrawal
1$1,000,000$1,000,000$1,100,000No$40,000
2$1,020,000$1,025,000$1,127,500No$41,000
3$980,000$1,050,625$1,155,688No$42,025
5$1,250,000$1,103,813$1,214,194Yes$50,000
6$1,180,000$1,250,000$1,375,000No$51,250

In Years 2 and 3, the portfolio hasn't exceeded the inflation-adjusted high by 10%, so spending just keeps pace with inflation. By Year 5, the portfolio has grown past the threshold, triggering a ratchet — spending jumps from about $43,000 to $50,000. In Year 6, even though the portfolio drops to $1,180,000, spending stays at $51,250 (inflation-adjusted) because ratchets are permanent.

When to Use This Method​

The Ratcheting method works best for retirees who:

  • Strongly prefer income stability and cannot tolerate spending cuts
  • Are willing to start with a conservative lifestyle in exchange for future raises
  • Have a portfolio large enough to afford the conservative initial rate
  • Want a set-it-and-forget-it rule with minimal ongoing decisions
  • View retirement spending as a one-way escalator, not a roller coaster
Try It Yourself

Compare Ratcheting against other strategies using your own numbers in the Scenario Builder.

References​