IRA RMD Calculator for Pension Rollover Balances (2026)

Rolled your pension lump sum to a traditional IRA? The IRS requires you to start withdrawing a minimum amount each year — whether you need the money or not. This calculator shows when your RMDs start, how much you must take each year, and whether your RMDs will trigger Medicare IRMAA surcharges — using 2026 SECURE 2.0 rules.

How RMDs work for a pension rollover IRA

When you roll a pension lump sum directly into a traditional (pre-tax) IRA, the account is subject to Required Minimum Distributions under IRC §401(a)(9). The IRS requires you to take a minimum withdrawal each year starting at your RMD age — you cannot leave the money growing indefinitely. Key mechanics:

• The RMD amount = prior December 31 balance ÷ your Uniform Lifetime Table divisor. The divisor decreases each year as your life expectancy shortens, forcing larger percentage withdrawals over time.
• You must take the RMD even if you don't need the income. Missed RMDs trigger a 25% excise tax on the amount not taken (reduced to 10% if corrected within 2 years per SECURE 2.0 §302).
• RMDs from a traditional IRA are 100% taxable as ordinary income. Unlike a pension annuity with after-tax contributions (see the Simplified Method calculator), most pension rollover IRAs are entirely pre-tax and taxed in full when withdrawn.
• Roth IRAs are exempt. Roth IRAs have no lifetime RMD requirement. Roth 401(k)/403(b)/457(b) plans are also exempt starting in 2024 per SECURE 2.0 §325.

RMD start ages under SECURE 2.0 (2026 rules)

For someone born in 1960 who retires at 62 with a $900,000 pension rollover, the IRA has 13 years to grow before RMDs begin at age 75 — a significant compounding window, but also a larger balance generating larger RMDs later.

The IRMAA risk: why RMDs matter beyond income taxes

Medicare Part B and Part D premiums include income-based surcharges called IRMAA (Income-Related Monthly Adjustment Amount). The 2026 IRMAA thresholds are based on your 2024 Modified Adjusted Gross Income:

Note: IRMAA uses a 2-year lookback. Your 2026 premiums are based on 2024 income. The 2026 IRMAA thresholds above use the CMS-published 2026 figures (applied to 2024 MAGI). ²

A $900,000 pension rollover IRA generating a $34,000 RMD at age 73, added to $40,000 in pension annuity income and $28,000 in Social Security, produces $102,000 of gross income — below the single-filer IRMAA threshold. But at age 80 when the IRA has grown and RMDs reach $50,000+, the same retiree easily crosses into IRMAA territory, adding $888–$2,220/year in Medicare surcharges indefinitely.

The Roth conversion window: reducing future RMDs

The years between pension rollover and RMD start age are the most tax-efficient window to convert traditional IRA dollars to Roth. Converted amounts leave the traditional IRA (reducing future RMDs) and grow tax-free in the Roth (no RMDs ever). The math works best when:

• Your current marginal rate is lower than your projected RMD-era rate
• You're between ages 60 and your RMD start age (0–13 year window, depending on birth year)
• You can pay conversion taxes from non-IRA funds (don't use the IRA itself to pay the tax bill)

See the full Roth IRA conversion guide for pension rollovers for bracket math and worked examples.

Strategies to manage RMDs from a pension rollover IRA

• Roth conversions during the pre-RMD window. Convert $50,000–$100,000/year in the years before RMDs start, staying within your target bracket (typically filling up to the 22% or 24% bracket). See the Roth conversion guide.
• QLAC (Qualified Longevity Annuity Contract). You can shelter up to $210,000 of an IRA from RMDs until as late as age 85 using a QLAC — an annuity purchased inside the IRA. The $210,000 is excluded from the RMD calculation entirely until the QLAC begins paying income. Limit per IRS Notice 2025-67.¹
• QCD (Qualified Charitable Distribution). Starting at age 70½, you can direct up to $111,000/year (2026 limit) directly from your IRA to charity. QCDs satisfy your RMD, reduce your MAGI, and reduce IRMAA exposure — but only if you're charitably inclined. See the RMD planning guide.
• Aggregating RMDs. If you have multiple traditional IRAs, you must calculate RMDs separately for each but can satisfy the aggregate total from any single IRA — useful for consolidation and simplification.

When to involve a financial advisor

RMD planning intersects with Roth conversions, IRMAA brackets, Social Security provisional income taxation, and estate planning — all simultaneously. A fee-only advisor is warranted when:

• Your IRA balance exceeds $500,000 and you haven't modeled Roth conversion scenarios
• Your projected RMDs will push income above the IRMAA threshold ($106K single / $212K MFJ for 2026 purposes)
• You have multiple accounts (IRA, Roth IRA, pension annuity, Social Security) that need sequenced withdrawal planning
• You're within 5–10 years of your RMD start age and haven't built a conversion plan

See our guide on how to evaluate a pension rollover specialist.