IRA & 401(k) Guide — 2026 U.S. Retirement Account Rules and Tax Strategies

Hanmi CPA · Compliance Guide

IRA & 401(k) Retirement Accounts
2026 U.S. Tax Rules, Contribution Limits & Withdrawal Planning

A practical reference covering 2026 contribution limits, Roth vs. Traditional trade-offs, income phase-outs, RMD rules, rollover mechanics, and year-end planning strategies for U.S. taxpayers.

2026 Limits IRA Rules 401(k) RMDs SECURE 2.0

Section 01

Overview

Retirement accounts such as IRAs and 401(k)s are essential tools for long-term wealth building and tax planning. This guide explains how Traditional and Roth accounts work, 2026 contribution limits, withdrawal rules, and tax implications for U.S. taxpayers.

Readers will learn how to choose the right account type, optimize contributions under 2026 IRS rules — including changes from SECURE 2.0 now fully in effect — and avoid penalties from incorrect contributions, early withdrawals, or missed required minimum distributions.

Section 02

Why This Matters

Retirement accounts offer significant tax advantages, but they come with strict IRS rules that carry substantial penalties when violated. Incorrect contributions, early withdrawals, or failure to take required minimum distributions (RMDs) can each result in significant tax costs.

SECURE 2.0 — Key 2026 Changes in Effect: Several SECURE 2.0 provisions became effective in 2026: (1) the super catch-up contribution for ages 60–63 is available in all qualifying plans; (2) workers earning more than $150,000 in prior-year FICA wages must make catch-up contributions on a Roth basis only; (3) IRA catch-up contributions are now inflation-indexed for the first time, resulting in a $1,100 limit for 2026 (up from the long-standing flat $1,000).

⚠ RMD Penalty: Failure to take a required minimum distribution results in a penalty of 25% of the amount not withdrawn(reduced to 10% if corrected within two years). This is one of the most expensive retirement account errors — particularly for taxpayers who inherit IRAs and are unaware of their RMD obligations.

Section 03

2026 Contribution Limits

All limits below are per IRS Notice 2025-67. The $7,500 IRA limit and $24,500 401(k) deferral limit represent increases from 2025 ($7,000 and $23,500 respectively). The combined IRA limit applies across all Traditional and Roth IRAs owned — it is not a per-account limit.

IRA Contribution (under 50)

$7,500

Combined limit across all Traditional + Roth IRAs. Up from $7,000 in 2025. Cannot exceed earned income for the year.

IRA Catch-Up (age 50+)

+$1,100

Total: $8,600. Now inflation-indexed under SECURE 2.0 — increased from the prior flat $1,000 for the first time in 2026.

401(k) Employee Deferral

$24,500

Up from $23,500 in 2025. Applies to 401(k), 403(b), most 457(b), and TSP. Does not include employer contributions.

401(k) Age 50–59 & 64+ Catch-Up

+$8,000

Total: $32,500. Up from $7,500 in 2025. Applies to all eligible participants age 50+ except those in the 60–63 super catch-up window.

SECURE 2.0 Super Catch-Up (age 60–63)

+$11,250

Total: $35,750. Replaces the standard $8,000 catch-up for ages 60–63 only. Reverts to $8,000 at age 64. Plan must elect to adopt.

401(k) Total (Employee + Employer)

$72,000

IRC §415(c) annual additions limit. Includes employee deferrals, employer match, profit sharing. Up from $69,000 in 2025.

⚠ 2026 New Rule — Roth Catch-Up Requirement (SECURE 2.0 §603): Starting in 2026, employees who earned more than $150,000 in FICA wages from the same employer in 2025 must make all catch-up contributions (age 50+ and super catch-up) on a Roth basis only — after-tax dollars, no current deduction. This applies to 401(k), 403(b), and governmental 457(b) plans. Verify with your plan administrator whether your plan has implemented this requirement.

Section 04

Traditional vs. Roth IRA

The choice between Traditional and Roth IRA depends primarily on whether current-year tax reduction or future tax-free withdrawals provides greater benefit — a function of the taxpayer's current vs. expected future tax rate.

Traditional IRA

Contributions may be tax-deductible depending on income and workplace plan coverage
Growth is tax-deferred — no tax until withdrawal
Withdrawals taxed as ordinary income at the rate in effect at withdrawal
Subject to RMDs beginning at age 73
No income limit to contribute ; income limits affect deductibility only
Non-deductible contributions must be tracked on Form 8606 to avoid double taxation
Best when current marginal rate exceeds expected retirement rate

Roth IRA

Contributions are after-tax — no current deduction
Growth and qualified withdrawals are tax-free
No RMDs during the original owner's lifetime
Contributions (not earnings) may be withdrawn at any time, tax and penalty-free
Income limits apply — phase-out begins at $153,000 (single) / $242,000 (MFJ)
Five-year holding rule applies to earnings before tax-free withdrawal
Best when current marginal rate is lower than expected retirement rate

Backdoor Roth IRA: Taxpayers whose income exceeds the Roth IRA phase-out may make a non-deductible Traditional IRA contribution and then convert it to a Roth IRA. This "backdoor" strategy is legal and widely used. However, the pro-rata rule applies — if the taxpayer has other pre-tax Traditional IRA balances, a portion of the conversion will be taxable. The pro-rata calculation is reported on Form 8606.

Section 05

Income Phase-Out Tables — 2026

Phase-out ranges determine whether a Roth IRA contribution is allowed and whether a Traditional IRA contribution is deductible. All figures are based on Modified Adjusted Gross Income (MAGI). Per IRS Notice 2025-67.

Roth IRA — Contribution Eligibility

Filing Status	Full Contribution (MAGI below)	Phase-Out Range	No Contribution (MAGI above)
Single / Head of Household	$153,000	$153,000 – $168,000	$168,000
Married Filing Jointly	$242,000	$242,000 – $252,000	$252,000
Married Filing Separately	$0	$0 – $10,000	$10,000

Traditional IRA — Deductibility (If Covered by Workplace Plan)

Filing Status / Coverage	Full Deduction (MAGI below)	Phase-Out Range	No Deduction (MAGI above)
Single — covered by workplace plan	$81,000	$81,000 – $91,000	$91,000
MFJ — contributing spouse covered	$129,000	$129,000 – $149,000	$149,000
MFJ — contributing spouse NOT covered; other spouse IS covered	$242,000	$242,000 – $252,000	$252,000
MFS — covered by workplace plan	$0	$0 – $10,000	$10,000
Neither spouse covered by workplace plan	Full deduction available at any income level — no phase-out applies

Non-Deductible IRA Contributions: Taxpayers above the Traditional IRA deduction phase-out may still contribute to a Traditional IRA — the contribution is simply non-deductible. Non-deductible contributions must be reported on Form 8606 each year. Failure to track non-deductible basis results in double taxation at withdrawal (the after-tax amount is taxed again as ordinary income).

Section 06

401(k) Plans

Employer-sponsored 401(k) plans offer higher contribution limits than IRAs and may include employer matching — one of the highest-return "investments" available to employees. Understanding plan options, matching formulas, and vesting schedules is essential for maximizing the benefit.

Traditional vs. Roth 401(k)

Traditional 401(k): Pre-tax contributions reduce current taxable income. Withdrawals in retirement taxed as ordinary income. Employer match is always pre-tax regardless of whether the employee uses Traditional or Roth deferrals.
Roth 401(k): After-tax contributions — no current deduction. Qualified withdrawals tax-free. No income limits (unlike Roth IRA). Roth 401(k) balances are subject to RMDs unless rolled into a Roth IRA before the RMD start date.
Vesting schedules determine when employer contributions become the employee's property. Common schedules: immediate vesting, cliff vesting (100% after 3 years), or graded vesting (20% per year over 6 years). Only vested balances can be taken upon separation from service.

Employer Match — Priority Rule

IRS requires taxpayers to contribute at least enough to receive the full employer match before directing funds to other savings vehicles. A 50% match on 6% of salary is a 50% immediate return — no investment can reliably beat it.
Employer match is excluded from the employee's $24,500 deferral limit but counts toward the $72,000 annual additions limit (IRC §415(c)).
The compensation cap for purposes of calculating employer match is $360,000 in 2026 — employer contributions based on salary above this amount are not permitted.

Catch-Up Contribution Tiers — 2026

Age Group	Employee Deferral	Catch-Up	Maximum Personal Total
Under 50	$24,500	—	$24,500
Age 50–59 and 64+	$24,500	+$8,000	$32,500
Age 60–63 (SECURE 2.0 super catch-up)	$24,500	+$11,250	$35,750

Section 07

Early Withdrawal Rules

Withdrawals from Traditional IRAs, 401(k)s, and other pre-tax retirement accounts before age 59½ are generally subject to both ordinary income tax and a 10% early withdrawal penalty under IRC §72(t). The penalty applies to the taxable portion of the distribution.

Exceptions to the 10% Penalty

Death or disability — applies to all account types.
Substantially Equal Periodic Payments (SEPP / 72(t) distributions) — a series of substantially equal payments over the taxpayer's life expectancy. Once started, the schedule must be maintained for the longer of 5 years or until age 59½. Modification triggers retroactive penalties.
First-time home purchase (IRA only) — up to $10,000 lifetime, penalty-free but still taxable.
Qualified education expenses (IRA only) — penalty waived; income tax still applies.
Birth or adoption expenses — up to $5,000 per child, penalty-free but taxable.
Separation from service at age 55 or older (401(k) only) — if the employee separates from the employer maintaining the plan in or after the year the employee reaches 55, the 10% penalty does not apply to distributions from that specific plan.
Qualified disaster distributions — subject to specific IRS declarations.

⚠ Roth IRA Ordering Rules: Roth IRA withdrawals follow a specific ordering: (1) contributions — always tax and penalty-free; (2) conversion amounts — tax-free after 5 years per conversion; (3) earnings — taxable and subject to 10% penalty if under 59½ and the account has not been open 5 years. Many investors mistakenly believe all Roth withdrawals are always tax-free, but earnings withdrawn before the 5-year rule is satisfied and before age 59½ are taxable.

Section 08

Required Minimum Distributions (RMDs)

IRS requires taxpayers to begin withdrawing minimum amounts from most pre-tax retirement accounts starting at age 73 (under the SECURE 2.0 change effective 2023). The RMD amount is calculated each year based on the account balance and IRS life expectancy tables.

Which Accounts Are Subject to RMDs

Subject to RMDs: Traditional IRA, SEP-IRA, SIMPLE IRA, Traditional 401(k), Traditional 403(b), governmental 457(b), and Roth 401(k) (unless rolled into a Roth IRA).
Not subject to RMDs (original owner): Roth IRA — the original owner has no RMD obligation during their lifetime. This makes the Roth IRA uniquely powerful for estate planning.
Still working exception: Employees who are still working and are not a 5% or more owner of the employer may delay 401(k) RMDs beyond age 73 until actual retirement. This exception applies to the current employer's plan only — not to IRAs or prior employer plans.

RMD Calculation

The annual RMD equals the account balance on December 31 of the prior year divided by the applicable life expectancy factor from the IRS Uniform Lifetime Table (Publication 590-B).
The first RMD may be delayed until April 1 of the year following the year the taxpayer turns 73 — but delaying results in two RMDs in the same year(one by April 1 and one by December 31), which can push the taxpayer into a higher tax bracket.
RMDs cannot be rolled over to another retirement account — they must be taken as a distribution. The taxable RMD amount is included in gross income as ordinary income.

Inherited IRAs — 10-Year Rule

Non-spouse beneficiaries who inherit an IRA after 2019 are generally subject to the 10-year rule: the entire account must be distributed by the end of the 10th year following the year of death.
If the original owner had already begun RMDs, the beneficiary must also take annual RMDs in years 1–9 and distribute the remainder by year 10.
Eligible designated beneficiaries (surviving spouse, minor children, disabled individuals, and beneficiaries not more than 10 years younger than the decedent) may still use the life expectancy "stretch" method.

Section 09

Rollovers & Transfers

Direct rollover (trustee-to-trustee transfer): Funds move directly from one custodian to another without passing through the taxpayer's hands. No withholding; no tax consequence. The preferred method for all account moves.
Indirect rollover (60-day rollover): The taxpayer receives the distribution and must re-deposit it into a qualifying account within 60 days. The distributing plan withholds 20% for income tax on 401(k) distributions — the taxpayer must deposit the full pre-withholding amount (including the 20% from personal funds) to avoid a taxable distribution. The withheld 20% is recovered on the tax return.
One-rollover-per-12-month rule: IRA-to-IRA indirect rollovers are limited to one per 12 months across all IRAs combined (not per IRA). Violating this rule results in the second rollover being treated as a taxable distribution plus the 10% penalty if under 59½. Direct trustee-to-trustee transfers are not subject to this limit.
Roth conversion: Moving pre-tax Traditional IRA or 401(k) funds to a Roth account is a taxable event — the converted amount is included in gross income in the year of conversion at ordinary income rates. No 10% early withdrawal penalty applies to conversions, but strategic timing (lower-income years) reduces the tax cost.

Roth Conversion Strategy: The optimal time to convert Traditional IRA or 401(k) funds to Roth is during a year when taxable income is temporarily lower than normal — for example, between retirement and Social Security or RMD commencement. Converting in stages over several years can fill the 12% or 22% bracket without triggering the 32% rate, building a Roth balance that grows and distributes tax-free for life.

Section 10

Step-by-Step Guidance

Determine Account Eligibility

Calculate your 2026 MAGI to determine Roth IRA eligibility: full contribution below $153,000 (single) / $242,000 (MFJ); phase-out above those levels.
Determine whether Traditional IRA contributions are deductible based on MAGI and workplace plan coverage — use the phase-out tables above.
Confirm your employer's 401(k) availability, matching formula, vesting schedule, and whether the plan has adopted SECURE 2.0 provisions including the super catch-up.

Choose the Right Account Type

Use Traditional accounts to reduce current taxable income if your marginal rate today is higher than your expected rate in retirement.
Use Roth accounts for long-term tax-free growth if you expect to be in the same or higher bracket in retirement, or if you want to minimize future RMDs.
Consider a mix of both — tax diversification gives you flexibility to draw from whichever source is most efficient in any given year of retirement.

Maximize Contributions in Priority Order

First: Contribute enough to your 401(k) to receive the full employer match — this is a guaranteed 50%–100% return on those dollars.
Second: Max out your IRA ($7,500, or $8,600 if 50+) — preferably Roth if eligible.
Third: Return to the 401(k) to maximize the $24,500 employee deferral limit (or $32,500 / $35,750 with catch-up contributions).
If age 60–63, confirm whether your plan has adopted the SECURE 2.0 super catch-up to access the $11,250 enhanced limit.

Allocate Investments Appropriately

Use diversified low-cost index funds or target-date funds as the core. Target-date funds automatically shift to more conservative allocations as retirement approaches.
Apply asset location — hold tax-inefficient investments (bonds, REITs, high-dividend stocks) in tax-deferred accounts; hold tax-efficient growth assets in Roth accounts.
Rebalance annually to maintain the target allocation; use new contributions to rebalance rather than selling, to minimize taxable events.

Plan Withdrawals and RMDs Strategically

Avoid early withdrawals unless an exception applies — the combined tax and 10% penalty can cost 32%–47% of the distribution at higher income levels.
Begin RMD planning before age 73. Model the future RMD amounts; if projected RMDs would push income into a higher bracket, consider Roth conversions in the years before RMDs commence.
Take the first RMD by December 31 of the year you turn 73 (not April 1 of the following year) to avoid doubling up in year two.

Manage Rollovers Carefully

Always use direct (trustee-to-trustee) rollovers when changing employers or consolidating accounts. Avoid taking possession of the funds to prevent mandatory 20% withholding and the 60-day clock risk.
Track the one-IRA-rollover-per-12-month rule across all IRA accounts. Use direct transfers, which are unlimited, instead.
Roll Roth 401(k) balances into a Roth IRA before RMDs begin — this eliminates the Roth 401(k)'s RMD obligation and preserves tax-free growth.

Conduct Annual Retirement Planning Review

Reassess contribution levels each year — income changes, life events, and new limits may affect optimal contribution amounts and account choices.
Review investment performance and rebalance to target allocation.
Evaluate Roth conversion opportunities based on the year's actual taxable income.
Confirm beneficiary designations are current — beneficiary designations on retirement accounts override the will and must be reviewed after major life events.

Section 11

Practical Examples

Case 01 Roth IRA Contribution — Eligibility and After-Tax Value

A single taxpayer earns $110,000 in 2026. MAGI is below the $153,000 Roth phase-out threshold, so a full $7,500 contribution is permitted. The taxpayer is in the 22% marginal bracket.

Roth vs. Traditional IRA — Comparison at Contribution

Roth IRA contribution (after-tax)	$7,500 — no deduction
Traditional IRA contribution (deductible — covered by 401(k), MAGI $110,000 > $91,000 phase-out)	$0 deductible (above phase-out); contribution is non-deductible
Roth advantage: 30 years at 7% growth, tax-free withdrawal	~$57,100 tax-free vs. ~$40,000 after tax (Traditional, 22% rate)
Roth is better here because	No Traditional deduction available; future growth is tax-free

❌ Incorrect

Assuming Roth IRA contributions are tax-deductible. They are not. The benefit is tax-free growth and withdrawal — not a current deduction.

✓ Correct

Contribute the full $7,500 to Roth IRA. Because the Traditional deduction is phased out at this income level with 401(k) coverage, Roth is clearly superior — all future growth is tax-free.

Case 02 401(k) Employer Match — The Priority Rule

An employee earns $80,000 and their employer offers a 100% match on the first 4% of salary. The employee is currently contributing 2% to the 401(k) and directing the rest to a taxable brokerage account.

Cost of Not Capturing Full Match

Employer match available (100% of 4% × $80,000)	$3,200/year
Employee currently contributing (2% × $80,000)	$1,600/year
Employer match actually received	$1,600/year
Match left on table annually	$1,600/year
10-year cost (at 7% growth, not capturing full match)	~$22,000 in foregone employer contributions + growth

❌ Incorrect

Contributing less than the match threshold to direct funds elsewhere. No investment, savings account, or other tax-advantaged vehicle offers a 100% immediate return.

✓ Correct

Increase 401(k) deferral to at least 4% to capture the full match. Then direct any additional savings to IRA or increase 401(k) further toward the $24,500 limit.

Case 03 Early Withdrawal — Tax and Penalty Cost

A taxpayer age 45 withdraws $20,000 from a Traditional IRA to cover home renovation costs. The taxpayer is in the 24% marginal bracket. No exception applies — home renovation is not a qualifying hardship for the penalty exception.

Cost of Early Withdrawal

Gross withdrawal	$20,000
Federal income tax (24%)	$4,800
10% early withdrawal penalty	$2,000
State income tax (varies — assume 5%)	$1,000
Net amount received	~$12,200 (39% effective cost)

Additionally, the $20,000 is no longer compounding tax-deferred — at 7% for 20 years, the foregone growth is approximately $77,000

❌ Incorrect

Treating the IRA as an emergency fund. Early withdrawal is one of the most expensive ways to access capital — nearly 40 cents on every dollar is lost to taxes and penalties.

✓ Correct

Explore alternatives first: personal loan, home equity line, or liquidating taxable brokerage assets. If retirement funds must be accessed, use the SEPP / 72(t) option or verify whether a qualifying exception applies.

Section 12

Common Mistakes

1 Not contributing enough to receive the full employer 401(k) match. This is forfeiting free money — the match is a guaranteed 50%–100% return that compounds tax-deferred for decades. It should be the first priority in any retirement savings plan.
2 Confusing Roth and Traditional tax treatment. Roth contributions are after-tax — there is no current deduction. The benefit is future tax-free growth. Traditional contributions may be deductible now, but all withdrawals are taxed as ordinary income later. Mixing up these treatments leads to incorrect expectations and incorrect tax returns.
3 Making ineligible Roth IRA contributions due to income limits. Contributions above the income phase-out are excess contributions subject to a 6% excise tax per year until corrected. Taxpayers above the limit must use the backdoor Roth strategy rather than contributing directly.
4 Not tracking non-deductible Traditional IRA contributions on Form 8606. Failure to file Form 8606 results in the non-deductible basis being lost. At withdrawal, the full amount is taxed as ordinary income — effectively taxing the same money twice.
5 Taking early withdrawals without understanding the true cost. The combined income tax, 10% penalty, and lost tax-deferred compounding means an early withdrawal can cost 40–50 cents on every dollar. Alternatives should always be explored first.
6 Missing RMD deadlines. The penalty is 25% of the amount not withdrawn — one of the largest percentage penalties in the tax code. Inherited IRA beneficiaries are particularly at risk because they may be unaware of their obligation under the 10-year rule.
7 Executing an indirect rollover when a direct rollover is available. The 60-day rollover requires replacing the 20% withheld from personal funds. Missing the 60-day deadline or failing to replace the withheld amount creates a taxable distribution. There is no reason to use an indirect rollover when a direct transfer is an option.
8 Not updating beneficiary designations after major life events. Retirement account beneficiary designations override the will. An outdated designation — naming an ex-spouse or deceased parent — can redirect the entire account balance contrary to the account holder's intent, with no legal remedy.

Section 13

Hanmi CPA Insight

Practitioner's Note

Retirement accounts are among the most powerful tax-advantaged tools available to U.S. taxpayers — but their value is entirely a function of how consistently and strategically they are used. The contribution decision made each year, the account type chosen, and the rollover executed correctly or incorrectly compound into dramatically different retirement outcomes over a 30-year horizon.

The 2026 rule changes from SECURE 2.0 — particularly the inflation-indexed IRA catch-up, the super catch-up for ages 60–63, and the Roth catch-up mandate for high earners — create meaningful planning opportunities and compliance requirements simultaneously. Workers in their early 60s who have not been maximizing contributions now have access to $35,750 per year in 401(k) savings — a substantial catch-up window that deserves attention before it closes at age 64.

The single most common and costly error remains the missed employer match. No tax strategy, investment selection, or fee optimization produces a guaranteed 50–100% return. After that, the Traditional vs. Roth decision, executed with a realistic view of current and future tax rates, and a disciplined Roth conversion strategy in the pre-RMD window, will determine the after-tax wealth available in retirement more than almost any other factor.