Working in Retirement: What You Actually Take Home

Part-time work in retirement is common — and financially complex. If you're already collecting Social Security before full retirement age, a dollar you earn above a threshold costs you 50 cents in withheld benefits. Add federal income tax and, if you're self-employed, self-employment tax, and a $40,000 consulting income can net considerably less than expected. This calculator shows the real picture, and the guide below explains what you can do about it.

Why So Many Retirees Work Part-Time

The EBRI 2024 Retirement Confidence Survey found that about 74% of workers expect to work for pay in retirement, and roughly 27% of current retirees actually do. The motivations are financial and psychological in roughly equal measure:

• Portfolio bridge. Working $20K–$30K per year lets a retiree delay Social Security, defer IRA withdrawals, and preserve the portfolio during its most vulnerable early years — reducing sequence-of-returns risk.
• Roth conversion opportunity. Earned income alone keeps taxable income lower than RMD-heavy later years; combining earned income with modest conversions uses the 12% bracket efficiently before RMDs stack up at 73.
• Identity and engagement. Purpose, structure, and social connection are non-financial returns that matter in a 20-30 year retirement.
• Healthcare bridge. Some employers offer coverage that can supplement or substitute for ACA marketplace coverage before Medicare at 65.

The Social Security Earnings Test: The Biggest Financial Variable

If you collect Social Security before your full retirement age (FRA) — which is 67 for everyone born 1960 or later — the earnings test reduces your benefit if your wages or self-employment income exceed annual limits.

2026 earnings test limits

• Under FRA all year: $24,480/year. SSA withholds $1 for every $2 you earn above this limit.¹
• In the year you reach FRA: $65,160/year. SSA withholds $1 for every $3 you earn above this limit — but only earnings before the month you reach FRA count.
• At FRA or older: No earnings test. Work as much as you want — your SS benefit is unaffected.

What counts as "earnings" for the test

Wages and net self-employment income count. Investment income (dividends, capital gains, RMDs, rental income, pension) does not count toward the earnings test. Only earned income triggers the withholding.

Withheld benefits come back — eventually

This is the most commonly misunderstood part of the earnings test. SSA doesn't take your benefits — it withholds them and adjusts your monthly payment upward at FRA to account for the months of withheld benefits. If SSA withholds 12 months of benefits while you work between 63 and 67, your monthly payment at FRA is recalculated as if you had first claimed at 63½ instead of 63. Over a long enough life, you recover most or all of the withheld amounts.

The practical implication: the earnings test is a deferral of benefits, not a permanent loss — though it takes years to break even on the withheld amounts, and you lose the time value of money in the interim. See the SS earnings test calculator for month-by-month withholding analysis.

Federal Income Tax on Part-Time Earnings

Wages and self-employment income are taxed as ordinary income in the year received. The key question is: what marginal bracket do the earnings fall in?

2026 federal income tax brackets (taxable income)

Source: IRS Rev. Proc. 2025-32. Taxable income = gross income minus deductions.

Standard deduction and the senior deduction

The 2026 standard deduction is $16,100 for single filers and $32,200 for married filing jointly.² If you're 65 or older, add an extra $2,050 (single) or $1,650 per qualifying spouse (MFJ).

OBBBA 2025 senior deduction: The One Big Beautiful Bill Act added a new $6,000 deduction per taxpayer age 65 or older, available to both itemizers and standard deduction claimants. It phases out at a 6% rate for income above $75,000 (single) or $150,000 (joint). At $175,000 single income, it fully phases out. This deduction meaningfully reduces the marginal tax on moderate part-time earnings for many retirees.²

The Social Security income tax interaction

Adding earned income to your tax return can push your combined income over the thresholds where Social Security becomes partially taxable (50% of SS taxable above $25,000 combined income for single filers; 85% above $34,000). If your SS wasn't previously taxable — or was only 50% taxable — additional earned income can trigger a higher percentage. This is sometimes called the "Social Security income torpedo." See the retirement income tax calculator for a full picture including your SS benefit.

Self-Employment Tax: The Cost of Working for Yourself

W-2 employees split FICA taxes with their employer — each pays 7.65% (6.2% SS + 1.45% Medicare). When you're self-employed, you pay both halves: the self-employment tax rate is 15.3%, applied to 92.35% of net SE income up to the 2026 SS wage base of $184,500.³ Above $184,500, only the 2.9% Medicare portion continues.

The good news: you deduct 50% of SE tax from gross income as an adjustment (before AGI), which partially offsets the hit. At $40,000 of self-employment income:

• SE tax on 92.35% = $40,000 × 0.9235 × 15.3% = $5,655
• SE tax deduction (50%) = $2,828 — reduces your taxable income dollar-for-dollar
• Net tax cost after deduction: ~$5,655 − ($2,828 × your marginal rate)

For many retirees in the 22% marginal bracket, the effective SE tax cost after the deduction is approximately 12-13% on top of federal income tax — substantial but not as bad as the headline 15.3% suggests.

IRMAA: How Part-Time Earnings Affect Medicare Premiums

Medicare Part B and Part D premiums are based on your Modified Adjusted Gross Income (MAGI) from two years prior. Significant part-time earnings today can increase your Medicare premium two years from now. The 2026 IRMAA Tier 1 threshold — where surcharges first kick in — is $109,000 for single filers and $218,000 for married filing jointly.⁴

If your total MAGI (other income + earnings + Social Security income inclusion) approaches these thresholds, coordinate with an advisor before the year closes. Strategies include QCDs, Roth conversions timed below the cliff, and income deferral. Use the IRMAA calculator to model your specific tier exposure.

The 401(k) Opportunity While Working

Part-time work creates an often-overlooked opportunity: you can contribute to a retirement plan again. If your employer offers a 401(k) or 403(b), you're eligible based on earned income. If you're self-employed, you can open a Solo 401(k) and contribute both as employee and employer.

2026 contribution limits

• Under age 50: $24,500 employee contribution
• Age 50-59 or age 64+: $32,500 (includes $8,000 catch-up)
• Ages 60-63 (SECURE 2.0 super catch-up): $35,750 — the highest contribution window available to any age group⁵

Contributing to a traditional 401(k) or Solo 401(k) reduces your AGI and can: (1) lower the portion of Social Security that's taxable, (2) keep you under an IRMAA threshold, and (3) create space for Roth conversions up to the next bracket boundary. Contributing to a Roth 401(k) instead builds tax-free assets with no RMD obligations.

Roth Conversion Interaction

Part-time income occupies bracket space that might otherwise be available for low-cost Roth conversions. If you're in the 12% bracket and earning $20,000 from consulting, you have $20,000 less room to convert traditional IRA dollars at 12% before crossing into 22%.

The strategy: model your bracket fill with and without part-time income to see how it compresses your conversion window. In some cases, delaying Social Security and front-loading conversions before taking on part-time work produces better lifetime outcomes. See the Roth conversion guide and Roth conversion calculator for scenario modeling.

State Income Tax on Retirement Wages

Many states exempt pension income, Social Security, or retirement account distributions but still tax earned wages normally. A few states with no income tax at all (FL, TX, NV, WY, WA, SD, AK, TN, NH on earned income) are exceptions. Before taking part-time work in a neighboring state or relocating, check whether your state and the work state both impose withholding on wages. See the state income taxes in retirement guide.

Practical Strategies for Working Retirees

Stay below the SS earnings limit (if collecting before FRA)

The $24,480 threshold is your ceiling if you're under 67 and collecting SS. Earning $5,000 over it costs you $2,500 in withheld benefits — a 50% marginal rate on that portion before income taxes even apply. If you can control your hours (consulting, freelancing), staying under $2,040/month in earnings eliminates the earnings test entirely.

Use the January–FRA month strategy

If you reach FRA in (say) October, only earnings from January through September count toward the year-of-FRA $65,160 limit. Earnings in October and after are completely unrestricted. Front-load earnings in the pre-FRA months if your FRA is mid-year.

Choose W-2 work over consulting if income is modest

At the same gross income, W-2 employment saves you approximately 7.65% vs. self-employment — because the employer pays the other half of FICA. At $30,000 in earnings, that's about $2,300 in additional tax if you're self-employed rather than an employee.

Maximize retirement plan contributions to reduce AGI

Traditional 401(k) contributions at your employer reduce W-2 income reported and shrink AGI — potentially keeping you below SS taxation thresholds or IRMAA cliffs. For self-employed workers, a Solo 401(k) employer contribution (up to 25% of net SE income) is deductible as a Schedule C business expense.

Coordinate with your Social Security claiming decision

If you're not yet collecting SS and planning to work for several more years, delaying SS to 70 means no earnings test and an 8%/year delayed retirement credit. A retiree who works $40K/year consulting from 65 to 68, delays SS to 70, and then retires from consulting often has a better lifetime outcome than one who claimed early and had benefits withheld. Use the SS claiming calculator to model breakeven ages under your scenario.