The real challenge in retirement isn’t saving — it’s spending

For decades, retirement planning has been centered around a single question: How much money do I need to save?

According to new research from Vanguard, that may be the wrong question for pre-retirees. The more important one, the firm argues, is how much income those savings can generate once retirement begins.

Vanguard makes the point that many investors spend decades concentrating on wealth accumulation only to face a new challenge once they retire: figuring out how to turn those assets into a reliable source of income that can last them throughout retirement. Without a clear income strategy, some retirees risk spending too much and depleting their savings too quickly, while others spend too little, fearing they will run out of money.

Read more: Why retirees underspend, and what advisors can do about it

As Americans continue to build retirement wealth through 401(k)s and IRAs, Vanguard says the focus should shift from growing account balances to creating a sustainable income stream that can support spending over the long term.   

That challenge sits at the center of their new research, which focuses on how investors can turn retirement savings into reliable income. The firm says that many retirees struggle with the transition from saving to spending, even after years of consistent investing, because they don’t have a clear plan for withdrawing their money.  

“The last day of work is a milestone, but retirement is a long journey shaped by decisions that evolve over time,” stressed Garrett Harbron, Vanguard head of advised wealth management strategies.

Vanguard outlines a framework designed to help investors manage retirement income by balancing spending needs with long-term maintainability and market uncertainty.

The research highlights withdrawal strategy as a central issue in retirement planning, arguing that the way money is taken from accounts can matter just as much as how it has been saved. Instead of relying on a fixed “magic number,” Vanguard encourages retirees to think in terms of sustainable withdrawal rates that can adapt to ever-changing market conditions.

The firm’s framework also stresses the importance of separating essential and non-essential expenses. By pairing guaranteed income sources, such as Social Security, with portfolio withdrawals designed to cover flexible spending, retirees can reduce the risk of both overspending and excessive caution.

Read more: Retirement without guaranteed income streams may mean near-total asset wipeout

This structure can help smooth one of the most difficult transitions in personal finance: shifting from building retirement assets to spending them in a controlled, predictable way. The firm notes that the timing and consistency of play a key role in how savings last, particularly as retirees face longer lifespans and more uncertainty in the market.

Rather than just focusing on a single “number” to reach before retirement, Vanguard suggests investors may be better served by regularly reassessing how their assets translate into ongoing income under changing economic conditions.

With retirement savings now largely concentrated in 401(k)s and IRAs, the responsibility for making those assets last has shifted more directly onto individual investors and their withdrawal decisions.