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Turning Your 401(k) and IRA Into Retirement Income: Withdrawal Rates, RMDs, and Social Security Timing (2026)

From saving to spending

For decades, the job was to save. Now the job is to turn a pile of money into a reliable paycheck that lasts as long as you do, while paying as little tax as practical. The key questions:

1. How much can you safely withdraw?
2. Which accounts should you draw from, and when?
3. When should you claim Social Security?
4. What are the rules (RMDs) and traps (IRMAA, benefit taxation)?

How much can you withdraw? The 4% rule and its limits

The classic 4% rule: withdraw 4% of your savings in the first year, then raise that dollar amount with inflation each year. Historically, in US markets, that lasted at least 30 years in most periods.

That income comes on top of Social Security and any pension. It's a starting point, not a guarantee. Retiring early (a 35–40-year horizon) argues for a lower rate; being willing to trim spending after bad years allows a higher one. Our guide to how much you need to retire explains the 25x math behind it.

When to claim Social Security

For anyone born in 1960 or later, full retirement age (FRA) is 67.

Delaying past 67 adds 8% a year until 70. Because Social Security is inflation-adjusted and lasts for life, many planners see delaying as the cheapest way to buy longevity insurance, especially for the higher earner in a married couple, since the survivor keeps the larger check.

Claiming earlier can still make sense if your health is poor, you need the income, or you're the lower-earning spouse. Check your personal estimates at ssa.gov.

The "gap years" strategy

Many people retire in their early-to-mid 60s but wait to claim Social Security. Those gap years are often the lowest-tax years of their adult life: no paycheck, no Social Security, no RMDs yet. Common moves:

1. Live on savings (taxable account and/or 401(k)/IRA withdrawals).
2. Do partial Roth conversions, moving pre-tax money to Roth up to the top of a low bracket (such as 12% or 22%) each year.
3. Claim Social Security at 70 for the largest check.

This shrinks future RMDs, reduces the share of Social Security that's taxed, and leaves tax-free Roth money for later or for heirs. If you're under 65 and buying ACA health coverage, weigh conversions against the subsidy income limits.

Required minimum distributions (RMDs)

You can't keep money in pre-tax accounts forever. RMDs start at:

Each year's RMD is your December 31 balance divided by a life-expectancy factor from the IRS Uniform Lifetime Table:

Example: a $600,000 IRA at 75 requires about $24,400 that year.

Key rules:

• Roth IRAs have no RMDs for the original owner, and since 2024 neither do Roth 401(k)s.
• Your first RMD can wait until April 1 of the following year, but then you take two in one year.
• Missing an RMD triggers a 25% excise tax (10% if fixed within two years).
• From age 70½, you can give IRA money directly to charity as a qualified charitable distribution (QCD); it counts toward your RMD and isn't taxed.
• If you're still working and don't own 5%+ of the company, you can usually delay RMDs from that employer's 401(k) until you retire.

Which account to tap first?

A traditional rule of thumb:

1. Taxable brokerage (only the gains are taxed, often at low capital-gains rates).
2. Pre-tax 401(k)/IRA (fully taxed as ordinary income).
3. Roth (tax-free; let it grow longest).

In practice, many retirees blend: they withdraw enough pre-tax money each year to fill the lower brackets, use taxable savings for the rest, and keep Roth money as a reserve for big expenses or high-tax years. This smooths taxes over your whole retirement instead of facing huge RMDs later.

Tax traps to plan around

• Taxation of Social Security. Depending on your "combined income," up to 85% of benefits can be taxable. Big IRA withdrawals push more of it into the taxable range.
• Medicare IRMAA. Higher income (based on your tax return from two years earlier) raises Medicare Part B and D premiums. A large one-time withdrawal or Roth conversion at 63 or later can raise premiums two years later.
• State taxes. Some states don't tax retirement income; others do. Factor this in if you're considering moving.

How to invest during retirement

Your money may need to last 25 to 30 years, so it still needs growth. Common setups:

• A balanced mix, around 40% to 60% stocks, via a target-date "retirement income" fund or a few index funds.
• A bucket approach: 1–2 years of spending in cash or Treasury bills, several years in bonds or a bond ladder, and the rest in stocks to refill the buckets over time.

See how to invest a rollover IRA for simple low-cost portfolios.

The bottom line

Turning savings into income takes as much planning as saving did. Start with a sustainable withdrawal rate around 4%, use the gap years before Social Security for Roth conversions, consider delaying Social Security for a bigger lifelong check, and plan around RMDs at 73 or 75. Run the numbers in your early 60s, and revisit them every year.

This article is educational and not personalized financial or tax advice. Rules and thresholds change; confirm current figures with the IRS and SSA.

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