The 4% Rule Explained: Does It Still Work in 2025?
The 4% rule is one of the most widely cited guidelines in retirement planning. It suggests that if you withdraw 4% of your portfolio in the first year of retirement and adjust for inflation each subsequent year, your savings will likely last 30 years.
The Origin: The Trinity Study
The rule emerged from the 1994 “Trinity Study” by three professors at Trinity University. They analyzed historical stock and bond returns from 1925 to 1995 and found that a 4% initial withdrawal rate had a very high success rate over 30-year retirement periods. Their research was updated in 2011 with similar conclusions.
How It Works in Practice
Example: $1,000,000 portfolio at retirement
- Year 1 withdrawal: $40,000 (4%)
- Year 2 (3% inflation): $41,200
- Year 3: $42,436
- ...and so on, adjusted for inflation each year
Criticisms and Limitations
Sequence of returns risk: If markets crash early in your retirement, withdrawing during a downturn can permanently impair your portfolio — even if average returns eventually recover.
Low interest rate environment:The original study was based on higher bond yields. Today's environment may warrant a more conservative 3–3.5% initial withdrawal rate, according to some researchers.
Longer retirements: A 30-year horizon assumes retiring at 65 and living to 95. Many people retire earlier or live longer, requiring their money to last 35–40 years.
Does It Still Work in 2025?
Most financial researchers still consider the 4% rule a reasonable starting point — with caveats. The key factors that affect its viability for you include:
- Your asset allocation (60/40 stocks/bonds is the classic assumption)
- Flexibility to reduce withdrawals in down markets
- Other income sources (Social Security, pension, part-time work)
- Your retirement horizon (how many years your savings must last)
Alternatives to the 4% Rule
Dynamic withdrawal strategies:Adjust withdrawals based on portfolio performance — take less when markets are down, more when they're up.
Bucket strategy: Divide your portfolio into short-term (cash), medium-term (bonds), and long-term (stocks) buckets to weather volatility.
Annuitization: Use a portion of savings to purchase an annuity that provides guaranteed income, allowing you to take more risk with the remainder.
See How the 4% Rule Applies to You
Our Retirement Income Calculator uses the 4% rule to project your monthly income based on your savings.
Disclaimer: This article is for educational purposes only and does not constitute financial advice. Past performance does not guarantee future results.