8 Pension Rollover Mistakes That Cost Retirees $100,000 or More

The pension rollover decision is made once, under deadline pressure, with information that's hard to verify in real time. It determines whether a $600,000 lump sum stays $600,000 or arrives as $432,000 after avoidable taxes. The eight mistakes below span mechanical errors (wrong check type), planning failures (ignoring rate environment), and decision gaps (life-only annuity without modeling the survivor). Each has a dollar magnitude. Most are irreversible.

Mistake 1: Taking a check instead of doing a direct rollover (the 20% withholding trap)

Cost: 20% of the entire distribution, immediately — plus potential 10% penalty

Under IRC §3405(c), when a pension distributes an "eligible rollover distribution" by writing the check to you personally, the plan is legally required to withhold 20% of the entire amount for federal income tax.¹ This is not optional and it is not an estimate — it is mandatory.

Example: You elect a $620,000 lump sum. The plan mails you a check for $496,000, withholding $124,000. You have 60 days to deposit a full $620,000 into a rollover IRA to avoid any tax on the distribution. But you only have $496,000. If you can't produce the remaining $124,000 from savings to make the IRA whole, that $124,000 is treated as a taxable distribution — plus a 10% early withdrawal penalty if you're under 59½. At a 32% marginal rate, that's roughly $39,680 in federal income tax on the shortfall, plus $12,400 penalty — over $52,000 in unnecessary cost from choosing the wrong payment method.

→ Full guide: Pension Rollover to IRA: Execution Guide

Mistake 2: Rolling to an IRA at ages 55–59 and losing penalty-free access

Cost: 10% penalty on every pre-59½ withdrawal — $5,000–$40,000+ depending on withdrawal size

If you separate from service at the employer that holds your pension in or after the calendar year you turn 55, IRC §72(t)(2)(A)(v) allows you to take distributions from that employer's plan without the 10% early withdrawal penalty — even if you're under 59½.¹ For public safety employees (police, firefighters, EMS), the threshold is age 50.

This exception does not transfer to an IRA. Once you roll the lump sum into an IRA, the IRA is governed by its own rules. Withdrawals from an IRA before age 59½ are subject to the 10% early distribution penalty, regardless of why you rolled it there. The age-55 exception lives in the employer plan. You left it behind at the custodian transfer.

Who this hurts: A 57-year-old who retires early and plans to draw $35,000/year from the pension rollover for 2 years before turning 59½. If the money is in an IRA, that's $3,500/year in unnecessary penalty — $7,000 total — on distributions they had a legal right to take penalty-free from the plan directly.

Solution when you're 55–59: Consider a partial rollover strategy — keep the amount you expect to withdraw before 59½ in the plan (or take it as a direct plan distribution before rolling the rest), then roll the remainder to an IRA. This requires planning before the rollover paperwork is signed.

→ Full guide: Leaving a Job With a Pension: Your Three Options

Mistake 3: Choosing life-only annuity without modeling the survivor gap

Cost: $200,000–$500,000 in forgone survivor income over a 20-year widow/widower period

When you elect an annuity form of payment, the life-only option pays the maximum monthly amount — because it's priced to cover one life, and payments stop completely at death. The joint-and-survivor (J&S) options pay a reduced lifetime amount, but continue at 50%, 75%, or 100% of your benefit to your spouse after you die.

The "penalty" for choosing J&S 50% versus life-only is typically 6–10% of your monthly benefit. Example:

The "pension max" strategy — take life-only and buy term life insurance to replace the survivor income — can make mathematical sense when the retiree is young, healthy, and insurable. But it has failure modes that cost spouses hundreds of thousands: the retiree lets the policy lapse, becomes uninsurable before the policy renews, or misjudges how long coverage is needed. A permanent survivor income requires no ongoing premium, no insurability requirement, and can't be cancelled. Modeling both options against longevity scenarios and Social Security survivor benefits is not optional for a spouse-dependent retiree.

→ Full guides: Joint-and-Survivor Election Guide · J&S Calculator

Mistake 4: Rolling TSP to an IRA — permanently losing the G Fund and Rule of 55

Cost: $50,000–$150,000+ in forgone guaranteed returns; 10% penalty risk on pre-59½ withdrawals

The TSP G Fund is a government securities fund that has earned a positive nominal return in every single month since TSP's 1987 inception, with zero credit or duration risk. In May 2026, the annualized G Fund rate is approximately 4.5%.⁴ This asset does not exist outside the TSP. No IRA, no private money-market fund, no brokerage "government" fund replicates it — not because of skill, but because the G Fund holds special non-marketable U.S. Treasury securities available only to TSP.

A federal employee who rolls $400,000 out of TSP at age 58 and moves it to a brokerage IRA to access "more investment options" gives up the G Fund permanently. If that $400,000 would have earned 4.5% in the G Fund for 7 years (to age 65) versus an IRA money-market fund at 3.5%, the cost is roughly $32,000 in lost income — on that portion alone. For larger balances, the delta is larger.

The second loss: TSP's Rule of 55. Federal employees who separate from service at age 55 or later can take penalty-free withdrawals directly from TSP before age 59½. This exception does not survive a rollover to an IRA — identical to mistake 2 above.

→ Full guide: TSP Rollover to IRA: What Federal Employees Need to Know

Mistake 5: Taking the lump sum at the wrong point in the interest rate cycle

Cost: $100,000–$400,000+ in lump-sum value, depending on rate environment and pension size

Pension lump sums are calculated using IRS §417(e) minimum present value segment rates — a set of three interest rates that discount your future monthly annuity payments back to a single present value.³ Higher segment rates mean a smaller lump sum. This is math, not policy: the same future cash flows are worth less when discounted at a higher rate.

To illustrate the real-dollar magnitude, a pension paying $4,200/month for life generates these lump-sum offers at different rate environments:

The same $4,200/month pension that could have been rolled over as a $1,050,000 lump sum in 2021 is worth roughly $470,000 less at current rates. If you're facing a lump-sum window deadline, checking where current segment rates stand relative to historical levels — and modeling what a 1-percentage-point rate decline would add to your offer — is not optional. It can swing the decision by hundreds of thousands of dollars.

→ Full guide: How Interest Rates Affect Pension Lump Sums

Mistake 6: Choosing cash distribution instead of direct rollover IRA (paying the tax voluntarily)

Cost: $150,000–$300,000 in avoidable income tax in a single year

Some pension holders "take the money" — elect a cash distribution instead of rolling to an IRA, planning to invest it themselves. The tax consequence is immediate and severe: the entire lump sum is taxable ordinary income in the year distributed, stacked on top of any other income you have that year.

Example: A retiree with $40,000 of other income takes a $700,000 pension lump sum as cash. Their 2026 federal taxable income is $740,000. At 2026 rates, that's approximately:

• $23,200 in the 12% bracket
• $47,150 in the 22% bracket
• $100,525 in the 24% bracket
• Remaining ~$540,000 in the 32–37% brackets

Total estimated federal tax on the $700,000 pension distribution: approximately $222,000–$245,000. A direct rollover to an IRA instead produces $0 in immediate tax. The IRA balance earns and compounds tax-deferred until withdrawals, giving the retiree control over when and how much they pay in tax — ideally in lower-income years via Roth conversions or bracket-targeted distributions.

The only rational reason to take a cash distribution from a pension is if you have a specific, near-term need for the cash that can't be met from other assets and that the age-55 rule (Mistake 2) doesn't cover. For most retirees, it's an expensive mistake rooted in unfamiliarity with the rollover process.

→ Full guide: Pension Lump Sum Tax Strategies

Mistake 7: Ignoring IRMAA — Medicare premium surcharges triggered by large rollover activity

Cost: $1,045–$5,112/person/year in Medicare Part B surcharges, potentially permanent

Medicare's Income-Related Monthly Adjustment Amount (IRMAA) adds surcharges to Part B premiums based on your modified adjusted gross income (MAGI) from two years prior. For 2026, the first IRMAA tier kicks in at $109,000 MAGI for single filers ($218,000 MFJ), adding $87.10/month per person above the $202.90 base premium — $1,045/year per person.²

Pension rollover decisions create two IRMAA traps:

1. The lump-sum year: A $600,000 cash distribution or Roth conversion stacked on top of other income in a single year creates IRMAA surcharges two years later. A $600,000 distribution triggering Tier 5 IRMAA ($628.90/month vs. $202.90 base) costs an extra $5,112/year per person — but only for one year, since MAGI normalizes.
2. The RMD ramp: More damaging is the long-term IRMAA floor created by a large traditional IRA. A $700,000 rollover IRA growing to $1.0M by age 73 (at 4.5% over 10 years) generates approximately $40,000/year in required minimum distributions — permanently elevating MAGI and potentially locking you into Tier 1 or Tier 2 IRMAA for the rest of your life.

The solution is a Roth conversion strategy during the window between retirement and age 73 (when RMDs begin). A retiree who converts $80,000–$100,000/year of the traditional pension rollover to a Roth IRA in the 10 years before RMDs can materially reduce the eventual RMD burden — paying 22–24% tax now to avoid 22–32% tax plus IRMAA later. The math depends on rate of return, life expectancy, and state taxes, but the Roth conversion window is real and finite.

→ Full guide: Pension Income and Medicare IRMAA Guide

Mistake 8: Not doing a Roth conversion before Social Security, Medicare, and RMDs close the window

Cost: $50,000–$200,000 in higher lifetime taxes from avoidable RMDs

The gap between pension rollover (often age 58–65) and the mandatory distribution window (RMDs at 73/75, Social Security at 70) is the highest-value Roth conversion window most retirees have in their lives. During this gap:

• Earned income is typically zero or low (retirement)
• Social Security income isn't yet flowing
• RMDs haven't started — the IRA can be converted on your terms, not IRS's schedule
• Under the OBBBA (enacted July 2025), the § 199A QBI deduction and TCJA-era provisions are permanent, but standard deductions and bracket structures remain — 2026 brackets are known quantities

Example: A 62-year-old retires with a $750,000 pension rollover into a traditional IRA. RMDs begin at 73 (SECURE 2.0 § 107 for those born 1951-1959).⁵ If the IRA grows at 5% for 11 years, the RMD balance at 73 is approximately $1,280,000. At a 4% RMD factor, that's $51,200 in year-one RMDs — stacked on top of Social Security income, creating an IRMAA exposure and compressed tax bracket space.

If instead this retiree converts $80,000/year for 10 years (ages 62–71) in the 22–24% tax bracket, the residual traditional IRA at 73 is dramatically smaller. The Roth assets grow tax-free, have no RMDs, and can fund late-retirement care needs or pass tax-free to heirs. The tax "cost" of conversion is paid at a rate the retiree controls — not the IRS's mandatory schedule.

→ Full guides: Pension Lump Sum Tax Strategies · Pension Income and Medicare IRMAA Guide · Pension + Social Security Coordination

The full specialist guide library

Each mistake above is covered in greater depth in one of our specialist guides. If you're in the process of making a pension decision, these cover the territory:

• Pension Lump Sum vs Annuity: The Complete Analysis — break-even table, longevity framing, implied yield calculation
• Pension Rollover to IRA Execution Guide — step-by-step direct rollover, 20% trap, NUA election
• Large-Employer Pension Buyout Windows — time-limited buyout programs, segment rate mechanics, PBGC floor
• Joint-and-Survivor Election Guide — actuarial cost drivers, pension-max risks, ERISA spousal consent
• FERS Retirement Planning Guide — FERS Supplement, survivor election cost, TSP decision
• TSP Rollover to IRA Guide — G Fund analysis, Rule of 55, Roth TSP mechanics
• CSRS Retirement Guide — tiered annuity formula, VCP Roth conversion opportunity
• Pension + Social Security Coordination — delay-to-70 bridge, provisional income taxation
• Pension Lump Sum Tax Strategies — 2026 bracket math, 10-year averaging (Form 4972)
• How Interest Rates Affect Pension Lump Sums — §417(e) mechanics, rate-timing framework
• Pension Income and Medicare IRMAA Guide — 2026 bracket table, Roth conversion window
• Leaving a Job With a Pension — deferred vested benefit, age-55 rule, PBGC coverage
• State Income Tax on Pension Income — full-exemption states, partial-exemption thresholds, relocation math
• Military Survivor Benefit Plan (SBP) Guide — SBP vs life insurance, paid-up provision, SBP-DIC offset elimination
• Union and Multi-Employer Pension Guide — PBGC multiemployer limits, zone funding status, ARPA SFA rescue
• Cash Balance Plan Rollover Guide — CBP mechanics, annuity conversion factor, §415(b) limit
• 457(b) Rollover to IRA Guide — governmental vs non-governmental, tainted-money trap
• Pension QDRO Guide — divorce pension division, alternate payee rollover options
• DROP Plan Retirement Guide — interest crediting, three exit options, Roth conversion opportunity

Quick-reference: mistake checklist before signing any rollover paperwork

1. Will the distribution be paid by direct rollover (check to custodian FBO you) or to you personally? If you're getting a personal check: stop and request direct rollover.
2. Are you ages 55–59? Will you need any of this money before 59½? If yes: partial rollover strategy — keep that amount in the plan.
3. Is this a TSP rollover? Have you modeled what the G Fund allocation is worth in the rollover vs. staying? Have you confirmed whether you qualify for TSP Rule of 55?
4. Is the annuity form of payment life-only? Have you compared J&S 50%/75%/100% against your spouse's other survivor income?
5. Have you checked the current IRS §417(e) segment rate environment? Are rates elevated vs. historical averages? Is there any flexibility on timing?
6. What is your MAGI going to be in the year of distribution? Will a large lump sum distribution trigger IRMAA two years from now?
7. Do you have a Roth conversion plan for the 10–13 year window between rollover and RMD onset?

1. IRS: Rollovers of Retirement Plan and IRA Distributions — IRC §3405(c) mandatory 20% withholding on eligible rollover distributions paid to the participant directly; IRC §72(t)(2)(A)(v) age-55-at-separation exception to 10% early distribution penalty; 60-day rollover rule under IRC §402(c)(3).
2. Medicare.gov: Part B Costs — 2026 standard Part B premium $202.90/month; IRMAA surcharge tiers beginning at $109,000 MAGI (single) / $218,000 (MFJ); Tier 1 adjusted premium $290.00/month ($87.10 surcharge per person).
3. IRS: Minimum Present Value Segment Rates (§417(e)) — monthly segment rates used by defined-benefit plans to calculate lump-sum present values. IRS Notice 2026-26 published April 2026 rates: 4.75% / 5.25% / 5.84%.
4. TSP: G Fund Share Price History and Current Rate — G Fund annualized return; the G Fund invests in special non-marketable U.S. Treasury securities available only to the Thrift Savings Plan and is guaranteed to never lose principal.
5. IRS: Required Minimum Distributions (RMDs) — SECURE 2.0 Act §107: RMD age is 73 for individuals born 1951–1959 and 75 for individuals born 1960 or later. Roth 401(k)/TSP RMDs eliminated starting 2024 under §325.

Values verified as of May 2026. IRMAA thresholds, IRS §417(e) segment rates, and PBGC guarantee limits are updated annually. The TSP G Fund rate changes monthly. Medicare premium information reflects 2026 rates; confirm at medicare.gov for the most current year. PensionRolloverAdvisorMatch is a referral service, not a licensed advisory firm. We may receive compensation from professionals in our network. Content is for informational purposes only and does not constitute financial, tax, or investment advice.