The biggest retirement savings mistakes in 2026 involve missing contribution deadlines, choosing the wrong tax year, and overlooking required withdrawals. Review payroll elections, IRA eligibility, catch-up rules, and required minimum distributions before the relevant deadline. An election is an instruction that tells a retirement plan how much to withhold and whether a contribution is traditional or Roth. A timely review can prevent excess contributions, missed opportunities, and avoidable tax consequences.
Table of Contents
- Set workplace contributions before payroll closes
- Check which catch-up limit applies
- Label IRA contributions with the correct year
- Separate contribution limits from tax eligibility
- Put both RMD dates on the calendar
Set workplace contributions before payroll closes
Employees may defer up to $24,500 in 2026 to a 401(k), 403(b), governmental 457 plan, or Thrift Savings Plan, according to the IRS contribution-limit announcement. Because these contributions normally pass through payroll, waiting until year-end may leave too few pay periods to reach the intended amount.
Use the plan's payroll system to check: Divide the amount you still intend to contribute by the remaining pay periods. Submit any adjustment early enough for payroll to process it.
- Contributions already made during 2026
- The amount scheduled from each remaining paycheck
- Whether the projected total exceeds the annual limit
- Whether a recent salary or payroll change affected the election
Check which catch-up limit applies
Workers age 50 or older may contribute an additional $8,000 to most workplace plans in 2026. That creates a potential combined limit of $32,500. Workers turning 60, 61, 62, or 63 during 2026 may qualify for an $11,250 catch-up instead, producing a potential total of $35,750.
However, the higher catch-up is available only if the plan permits it, as detailed in IRS Notice 2025-67. Do not assume payroll will recognize the larger limit automatically. Confirm your age-based eligibility, ask whether the plan allows the special catch-up, and make the required election under the plan's procedures.
Label IRA contributions with the correct year
The 2026 contribution limit is $7,500 across all traditional and Roth IRAs combined. It rises to $8,600 for people age 50 or older, and taxable compensation remains a limiting condition. A custodian may accept a 2026 traditional IRA contribution through April 15, 2027.
When contributing between January 1 and April 15, explicitly identify the contribution as being for 2026, consistent with the IRS reporting instructions. Otherwise, the contribution could be recorded for a different year than intended. Before transferring money, total every contribution made to your traditional and Roth IRAs for the same tax year. The limit applies across those accounts, not separately to each one.
Separate contribution limits from tax eligibility
A traditional IRA contribution does not automatically produce a full deduction. For workers covered by a workplace plan, the 2026 deduction phases out between $81,000 and $91,000 for single or head-of-household filers. For covered joint filers, the range is $129,000 to $149,000. Roth IRA eligibility has a different income test.
In 2026, eligibility phases out at modified adjusted gross income of $153,000 to $168,000 for single or head-of-household filers and $242,000 to $252,000 for joint filers. A designated Roth account inside a workplace plan does not use the Roth IRA income limits. The employee must still make a valid Roth election under plan rules, and the plan must provide an opportunity to make or change that election at least once each plan year. Higher-income employees should also distinguish 2026 from 2027. The final federal Roth catch-up regulations generally apply to taxable years beginning after December 31, 2026, so a plan's 2026 catch-up treatment may differ from its later approach.
Put both RMD dates on the calendar
A required minimum distribution, or RMD, is a mandatory withdrawal from certain retirement accounts. Traditional IRA and most workplace-plan owners generally begin RMDs at age 73. The first RMD may be delayed until April 1 of the following year. But that year's regular RMD still remains due by December 31, potentially placing two taxable withdrawals in one calendar year.
Missing the full amount can trigger an excise tax equal to 25% of the shortfall. The rate falls to 10% if the error is corrected within two years, according to the IRS RMD guidance. Do not combine every account's obligation without checking the rules. IRA RMDs may be aggregated, but RMDs from 401(k) and 457(b) plans must be taken separately.