2026 Contribution Limits Maximizer (2026)

One screen for every IRS cap you juggle

Retirement savers maintain a mental spreadsheet: 401(k) deferrals, employer match, IRA contributions, HSA payroll deductions, catch-up eligibility at birthdays, and whether a spouse’s plan blocks IRA deductibility. The contribution limits maximizer centralizes 2026 IRS figures so you see total room, amounts already contributed year-to-date, and remaining capacity across buckets.

This is not an investment recommendation—it is compliance-oriented planning. Hitting the $24,500 401(k) deferral cap while also funding an HSA and IRA is a high-class problem, but only if you track dates: front-loading 401(k) in March can accidentally block match smoothing or exceed caps if bonuses spike.

2026 limits reference

• 401(k) elective deferral: $24,500
• 401(k) catch-up (50+): +$8,000
• 401(k) enhanced catch-up (60–63): +$11,250 where adopted
• IRA: $7,500 + $1,100 catch-up at 50+
• HSA: $4,400 self-only / $8,750 family + $1,000 catch-up at 55+
• Social Security wage base (payroll context): $184,500

Source: IRS cost-of-living adjustments (Rev. Proc. 2025-32 and related 2026 notices).

How to use the maximizer

Enter age and coverage

Age drives catch-up eligibility. Indicate whether you have a workplace plan, HDHP for HSA, and family vs self-only HSA tier.

Enter year-to-date contributions

Pull YTD deferrals from your 401(k) portal, IRA contributions from Form 5498 previews, and HSA from employer or HSA bank statements.

Read remaining room

The tool subtracts YTD from caps including applicable catch-ups. Negative remaining room flags a correction need before April deadlines.

401(k) coordination

Multiple jobs mean separate 401(k)s share one employee deferral limit across all plans. Job-hoppers who maxed plan A in Q1 must throttle plan B or face excess deferral notices. Employer match does not free extra employee deferral room—it is a different bucket subject to Section 415(c) annual additions limits.

Project growth and match capture in the dedicated 401(k) calculator. See paycheck impact of raising deferrals in the paycheck calculator.

IRA deductibility vs contribution limit

You may contribute up to $7,500 ($8,600 with catch-up) even when deduction phases out—you can choose nondeductible traditional or Roth if income allows Roth contributions. Deduction phaseouts for covered workers reference MAGI thresholds in IRS publications. This tool shows headroom; deductibility is a separate checkbox on the return.

HSA triple tax advantage

HSAs require qualifying HDHP coverage without disqualifying general-purpose FSA coverage (with limited exceptions). Contributions reduce taxable wages when via cafeteria plan, grow tax-free, and withdraw tax-free for medical expenses. After 65, non-medical withdrawals face ordinary income tax without penalty. Model medical spend in the HSA calculator.

Worked example

Age 52, $140,000 salary, YTD $18,000 401(k), $4,000 IRA, family HSA with $3,000 YTD:

• 401(k) remaining: $24,500 + $8,000 catch-up − $18,000 = $14,500
• IRA remaining: $7,500 + $1,100 − $4,000 = $4,600
• HSA remaining: $8,750 − $3,000 = $5,750 (no HSA catch-up until 55)

Raising 401(k) by $14,500 reduces federal taxable wages—pair with federal tax calculator for tax savings.

Self-employed and SEP/Solo 401(k)

Schedule C profit feeds employer contribution limits on Solo 401(k) and SEP-IRA—often higher than employee deferrals alone. Enter net SE income when the tool supports owner-only plans. Also calculate SE tax separately.

Year-end acceleration

Increase December deferrals to use remaining 401(k) room—watch per-paycheck plan limits. IRA and HSA contributions for a tax year can often be made until the filing deadline; mark the tax year correctly on contributions.

Common mistakes

• Assuming each 401(k) job has its own $24,500 cap
• Missing enhanced 60–63 catch-up when plan adopted it
• HSA contributions while covered by non-HDHP spouse plan
• Roth IRA contributions above income limits without backdoor strategy awareness
• Ignoring employer true-up formulas when front-loading deferrals early

Related tools

401(k) calculator, HSA calculator, federal income tax calculator, Roth conversion calculator, and retirement calculator for long-range spending projections.

Mega backdoor Roth and after-tax 401(k) sub-limits

After-tax non-Roth 401(k) contributions count toward the overall Section 415(c) annual additions limit—not the $24,500 elective deferral cap. Plans that allow in-plan Roth conversions enable mega backdoor Roth strategies when elective deferrals, match, and profit-sharing leave headroom. Enter after-tax amounts separately when the tool exposes them.

457(b) and 403(b) parity notes

Government and nonprofit 457(b) plans share the $24,500 elective deferral limit with 401(k) in aggregate for the same employer type rules—457(b) has a separate catch-up in the final three years before retirement in governmental plans. 403(b) adds 15-year rule catch-ups for long-tenured employees. This maximizer focuses on common 401(k)/IRA/HSA buckets; specialty plan rules may need manual adjustment.

Spousal IRA when one spouse has no earned income

A working spouse can fund an IRA for a non-working spouse up to the same $7,500 limit (plus catch-up) when filing jointly and meeting income rules. Count both spouses’ IRA room in household planning.

Calendar-year planning checklist

January: set deferral percentages after reviewing last year’s W-2 Box 12 codes. March: confirm HSA eligibility after open enrollment changes. June: check YTD deferrals against half of annual caps. October: evaluate Roth conversion room using the Roth conversion calculator. December: fund IRA/HSA for the tax year before April deadline while topping 401(k) via last paychecks if room remains.

Missing the 401(k) cap wastes tax deferral permanently for that calendar year—unlike IRA contributions, you cannot fund 2026 employee deferrals in April 2027.

Employer non-elective contributions do not consume your $24,500 elective room but still grow tax-deferred—include them when projecting retirement balances in the 401(k) calculator.

Domestic partner and working spouse coordination

When both spouses have workplace plans, each has separate $24,500 deferral limits and separate match formulas. IRA deductibility phases out faster when either spouse is covered by a plan. Enter household totals in the maximizer but remember each 401(k) tracks deferrals per person—never combine two people into one employee cap.

If one spouse has no workplace plan, spousal IRA contributions remain on the table up to $7,500 each plus catch-ups—a frequently missed bucket when only one W-2 shows retirement deferrals on the stub.

Pro-rata and reverse rollover pitfalls

Mixing pre-tax and after-tax IRA balances triggers pro-rata rules on conversions and withdrawals. Backdoor Roth strategies fail cleanly only when pre-tax IRA balances are zero or isolated. Track Form 8606 basis annually.

SEP-IRA employer contributions from self-employment profit share the same IRA cap coordination—employer SEP dollars do not count against the $24,500 401(k) deferral but do affect IRA deductibility and total retirement exposure.

Defined benefit plan contributions for owners with actuarial designs can exceed $24,500 dramatically but require actuary setup—outside the simple caps shown here yet relevant when a CPA proposes pension plans for high-income Schedule C filers.

Automate HSA and 401(k) changes through payroll where possible—manual IRA checks in April are easier to forget than per-paycheck deductions set in January.

Track Roth IRA MAGI limits separately from contribution limits—you may have room to contribute but not to contribute to Roth directly, triggering backdoor workflows.

Employer payroll systems sometimes stop deferrals early when you hit the cap—confirm your last paychecks still capture full match true-ups if your plan offers them.

Voluntary after-tax 401(k) contributions differ from Roth deferrals for mega backdoor purposes—label payroll codes carefully when reading your benefits portal.

Fixed-dollar IRA contributions on January 2 beat waiting until April when markets move—you still count them for the prior tax year if made before the deadline.

2026 limits quick reference

• 401(k) elective deferral: $24,500; catch-up 50+: +$8,000; ages 60–63 enhanced: +$11,250 where adopted
• IRA: $7,500; catch-up 50+: +$1,100
• HSA: $4,400 self-only / $8,750 family; catch-up 55+: +$1,000

Annual additions limit (415(c)) often $72,000 including employer contributions—separate from the employee deferral cap. Highly compensated employee testing may refund deferrals mid-year; watch plan notices.

Coordination with Roth vs traditional IRA choice

Contribution room and deductibility diverge. You may contribute to IRA within limits while 401(k) is maxed, but traditional IRA deductibility phases out when covered by a workplace plan. See the Roth vs traditional IRA calculator for character choice; this maximizer shows headroom only.

Solo 401(k) and SEP for self-employed

Schedule C profit drives employer contribution limits on SEP-IRA and Solo 401(k)—often larger than employee deferrals alone. Enter net SE income when the tool supports owner-only plans. Employee deferral still capped at $24,500 plus catch-ups; employer profit-sharing adds on top subject to 415(c).

Excess deferral corrections

Contributions above caps must be distributed by deadlines to avoid double taxation. The maximizer flags negative remaining room—contact plan admin immediately if YTD exceeds limits after a job change or front-loaded deferrals.

HSA last-month rule

Mid-year HDHP enrollment may allow a full-year HSA contribution if you stay eligible through December plus the following month. Coverage tier changes require IRS worksheets—do not assume pro-rata without checking.

Planning takeaway

December is the deadline that matters for 401(k) employee deferrals; IRA and HSA often allow funding until the filing deadline. Use remaining room numbers here before year-end payroll cutoff dates—not in April when 401(k) room is gone.

Job changers and duplicate deferrals

Two 401(k)s in one year share one $24,500 employee limit. Front-loading at employer A then joining employer B requires throttling deferrals at B to avoid excess deferral notices. The maximizer YTD fields exist for that coordination—update after every job change.

Sources and methodology

Limits from IRS 2026 inflation adjustments. Remaining room is deterministic subtraction—verify with plan administrator records before filing excess deferral corrections.