Year-by-Year Retirement Tax Planning: The Decade Before and After Retirement

Ages 50 to 55: Building the Foundation You Will Draw On Later

The decade before retirement is when most of the accumulation decisions are made - and when the errors that cost the most in retirement are set in motion. At 50, the enhanced catch-up contributions available under SECURE 2.0 become relevant: in 2026, employees aged 50 to 59 can contribute $32,500 to a 401(k) or 403(b) ($24,500 base plus $8,000 catch-up). At 60, the enhanced catch-up for ages 60 to 63 kicks in, allowing $35,750 ($24,500 plus $11,250). The key question at this stage is not just how much to save, but in what type of account. Contributions going into a traditional 401(k) at 52 will be subject to whatever the tax rate is when you withdraw them at 74. If current rates are lower than expected future rates - which many tax professionals believe, given federal fiscal trends - you pay less today on Roth contributions and never again on the balance. This is the age to begin modeling your expected income in retirement. Project your Social Security benefit using the Social Security Administration's online estimator (ssa.gov). Add any pension income. Estimate what your investment accounts will generate if RMDs are required. This modeling exercise often reveals that the apparently lower bracket in retirement is not as low as assumed - especially when RMDs, Social Security taxation, and IRMAA all arrive simultaneously at 73.

Ages 55 to 60: Evaluating the Early Retirement Window

The years approaching 60 are when early retirement becomes a real possibility for many professionals who have saved aggressively. If retirement at 58 or 60 is plausible, several tax planning moves become relevant that do not apply later. The Rule of 55 allows penalty-free withdrawals from a 401(k) or 403(b) at the employer where you terminate service at age 55 or later in that year. This does not apply to IRAs. If you retire at 57 from an employer where your 401(k) sits, you can withdraw from that specific plan penalty-free. IRAs accessed before 59.5 normally carry the 10% penalty (with limited exceptions). The Substantially Equal Periodic Payments (SEPP) rule under IRS Section 72(t) provides another bridge for early retirees. You can begin a series of substantially equal payments from an IRA based on life expectancy calculations, continuing for at least five years or until age 59.5 (whichever is longer), without the 10% penalty. SEPP requires careful calculation and consistency - modifying the payments before the period ends restarts the penalty clock retroactively. At 55, begin a detailed pre-retirement tax model. Project income from all sources at various retirement ages. Model the IRMAA impact at 65 based on income at 63 (the two-year lookback). Identify the years with the widest bracket space for Roth conversions. This model is the map for all subsequent decisions.

Ages 60 to 65: The Critical Conversion Window

For retirees who leave work in their early 60s, the period from 60 to 65 is often the best conversion window available. Income is low (the paycheck has stopped, Social Security has not started, RMDs have not begun). Medicare eligibility does not begin until 65, so IRMAA surcharges are not yet relevant. The bracket space is widest. A retiree at 62 with $30,000 in pension income, filing jointly, has a taxable income of roughly $0 after the $32,200 standard deduction (if pension equals standard deduction). Every dollar converted from traditional IRA to Roth up to $24,800 is taxed at 10%, and the next $76,000 is taxed at 12%. Converting $100,000 per year at these rates - before IRMAA becomes relevant - is among the best tax efficiency available to any retiree. The IRMAA clock starts when you turn 65 and applies Medicare surcharges based on income from two years earlier. The income at 63 determines IRMAA at 65. A large conversion in 2025 (at age 63) shows up in 2027 Medicare premiums. Planning large conversions in the years before 63 avoids the IRMAA trigger entirely at 65. After 65, the IRMAA cliffs require careful monitoring of MAGI. Social Security claiming timing is also a 60-65 decision. Claiming at 62 locks in a permanently reduced benefit (5/9 of 1% per month for each month before FRA up to 36 months, then 5/12 of 1% per month beyond that). Delaying to 70 increases the benefit by 8% per year past FRA. Delaying also means more years of low income available for Roth conversions before Social Security adds to the taxable stack.

• Ages 50-55: Start Roth 401(k) contributions, model expected retirement income, maximize catch-up contributions
• Ages 55-60: Review the Rule of 55 if early retirement is possible, begin 10-year pre-retirement tax model, start small Roth conversions if income drops
• Ages 60-65: Execute largest Roth conversions (widest bracket space, pre-IRMAA), decide Social Security claiming timing with breakeven analysis
• Age 63: Plan carefully - income at 63 determines IRMAA at 65. Large conversions here may trigger surcharges starting at Medicare enrollment
• Age 65: Enroll in Medicare during the 7-month Initial Enrollment Window (3 months before 65th birthday month through 3 months after). Failure to enroll on time causes permanent premium penalties.
• Ages 65-70: Balance Roth conversions against IRMAA cliffs, use QCDs beginning at 70.5, maintain conversion pressure on traditional account balance

Ages 65 to 73: Medicare Management and the Final Conversion Push

Once Medicare begins at 65, the IRMAA threshold becomes the primary constraint on how much you can convert each year. In 2026, IRMAA surcharges begin when MAGI exceeds $109,000 for single filers or $218,000 for married filers (based on 2024 income). Each IRMAA tier adds to Medicare Part B and Part D premiums - ranging from $81.20 per month per person at the first tier to $487.00 per month per person at the highest. The practical implication is that most Medicare enrollees doing Roth conversions target staying below the first IRMAA threshold. For a married couple, that means keeping MAGI under $218,000 per year. With a $30,000 pension and $40,000 in Social Security (85% taxable = $34,000), the baseline taxable income is $64,000. That leaves $154,000 of MAGI room before the first IRMAA trigger for conversions. Qualified Charitable Distributions become available at 70.5 and provide an additional tool: up to $105,000 per person per year in direct IRA-to-charity transfers that satisfy RMDs without appearing in income. For a retiree with charitable goals, QCDs reduce the traditional IRA balance while simultaneously keeping MAGI low enough to preserve conversion room. The final conversion push - the years from 70 to 73 before RMDs start - should convert as much as possible without triggering IRMAA cliffs or the next tax bracket. By 73, the goal is a traditional IRA balance small enough that RMDs are manageable and do not cause cascading Social Security and Medicare cost increases.

Ages 73 and Beyond: RMD Management and Withdrawal Order

At 73, Required Minimum Distributions begin. The IRS Uniform Lifetime Table sets the distribution percentage based on age. At 73, the factor is 26.5, requiring roughly 3.77% of the prior December 31 balance. By 80, the factor is 20.2 (approximately 5%). Each year the RMD percentage increases while the account balance - if growing - may also increase. At this stage, the optimal strategy shifts from building to sequencing. The general withdrawal order that minimizes lifetime taxes is: taxable accounts first (up to the point where additional income might trigger higher rates), then traditional IRA or 401(k) (often forced by RMDs), then Roth IRA last (where assets compound the longest tax-free). However, this general rule bends based on specific circumstances. If traditional account balances are large and Roth is already substantial, letting the Roth grow while drawing from taxable first may make sense. If taxable accounts are exhausted, the sequence shifts to managing traditional withdrawals to avoid Social Security taxation and IRMAA cliffs. At 73 and beyond, estate planning becomes the active focus. Assets with large unrealized gains in taxable accounts should generally be held for the step-up in basis at death rather than sold and taxed. Roth IRA assets should be last to be spent - they pass to heirs income-tax-free and can grow tax-free inside the inherited account for up to 10 years (the SECURE Act 10-year rule for non-spouse beneficiaries). Life insurance death benefits pass income-tax-free regardless of timing. Tax planning in retirement is never one decision. It is a series of annual adjustments based on account balances, income sources, tax law changes, and family circumstances. The investors who approach it as a 20-year active process - not a one-time allocation choice - consistently come out ahead.