Why do the 5 years before retirement matter so much financially?

The 5 years before retirement are when most high-impact financial decisions — Roth conversions, Social Security timing, withdrawal sequencing, and portfolio restructuring — can still be shaped. After retirement, many of these decisions become much harder or impossible to reverse.

What is a retirement income plan and why do I need one?

A retirement income plan is a coordinated strategy that maps where your income will come from in retirement, how it will be taxed, and how long it needs to last. It covers Social Security timing, withdrawal sequencing, Roth conversion opportunities, and portfolio structure — all working together rather than as separate decisions.

What are the most common retirement planning mistakes?

The most common retirement planning mistakes include: waiting too long to do Roth IRA conversions, underestimating how Social Security and RMDs are taxed, staying in an accumulation portfolio too long and ignoring sequence-of-returns risk, and making account decisions without a coordinated withdrawal strategy.

What's the Biggest Mistake People Make in the 5 Years Before Retirement?

The 5 years before retirement are the most financially consequential of your life — and the most common mistake isn't a bad investment. It's not having a plan for what comes next.

Most people spend decades focused on accumulation. But the transition from saving to spending requires a completely different approach — and many people don't realize that until they're already in it.

👉 For a broader framework on how income and taxes work together in retirement, start with the Retirement Transition Field Guide.

Short Answer

The single biggest mistake is treating retirement like a finish line rather than a starting line — arriving without a clear income plan, a tax strategy, or a withdrawal sequence.

The result: people draw from the wrong accounts, pay more tax than they need to, and discover gaps in their income plan after it's too late to fix them easily.

The Real Mistake: No Retirement Income Plan

Building wealth doesn't automatically mean knowing how to use it.

The shift from accumulation to distribution is one of the most complex transitions in personal finance. It requires answering questions most people have never had to think about:

Which accounts do you draw from first?
How do you replace your paycheck with portfolio income?
How does Social Security fit into the picture?
What does your tax situation look like at 65, 70, 75?

Most people arrive at retirement without clear answers to any of these.

Other Common Mistakes in the 5 Years Before Retirement

Waiting too long to do Roth conversions
The window for low-cost Roth conversions often closes around age 63–65 when Social Security and RMDs begin stacking income. Many people miss this window entirely.

Underestimating taxes in retirement
Social Security can be up to 85% taxable. RMDs can push you into a higher bracket. IRMAA surcharges can increase Medicare premiums. These are not surprises — they're predictable, and they're avoidable with planning.

Staying in an accumulation portfolio too long
A portfolio built for growth over 30 years needs to be restructured for income over 25 years. Sequence-of-returns risk — taking losses early in retirement — can permanently damage a plan that looked solid on paper.

Making account decisions without a withdrawal strategy
Consolidating 401(k)s, rolling to an IRA, deciding when to claim Social Security — these aren't independent decisions. They interact. Without a coordinated plan, optimizing one can quietly undermine another.

Why the 5-Year Window Matters

After retirement, many of these decisions become much harder — or impossible — to reverse.

You can't undo years of missed Roth conversion opportunities. You can't recapture early Social Security benefits once they're claimed. You can't offset sequence-of-returns losses that happened in year one.

The 5 years before retirement are when most of these decisions can still be shaped. After that, you're working with what you have.

How This Fits Into Your Retirement Plan

Avoiding this mistake isn't about perfection. It's about having a clear answer to:

Where is my retirement income coming from?
What will I owe in taxes?
How long does this plan need to last?

That's the foundation of a retirement income plan — and it's the starting point for every client engagement at Sentient Financial.

How Sentient Financial Approaches This

Every engagement starts with a clear picture of the transition ahead — not just account balances, but income sources, tax exposure, and withdrawal sequencing.

That includes:

Identifying the highest-priority decisions in the next 1–5 years
Building a multi-year tax and income model
Coordinating Social Security, RMDs, and portfolio withdrawals
Stress-testing the plan against market and longevity risk

All advice is provided as a fee-only fiduciary, with no commissions or product incentives.

If you’re trying to understand how Social Security will be taxed in your situation, the real value comes from seeing how it fits into your overall income plan.

If you want to walk through that:

You can schedule a Retirement Fit Call
Or reach out directly if you’d prefer to start with a conversation

Disclosure: Sentient Financial, LLC is a California-registered investment adviser. This content is for informational purposes only and is not investment or tax advice..