How Working Part-Time in Retirement Affects Your Finances

More and more people I work with aren't planning a hard stop — one day working, the next day fully retired. Instead, they're thinking about something in between: consulting a few days a week, taking on a part-time role in a field they enjoy, turning a hobby into a small income stream, or phasing out of their career gradually over a few years rather than all at once.

It's a genuinely appealing vision, and for many people it's the right one. But working part-time in retirement has financial implications that are worth understanding before you build your plan around it. Some of them work in your favor. A few can catch you off guard if you're not paying attention.

The upside: what part-time income actually does for your plan

Even a modest amount of earned income in the early years of retirement can have an outsized impact on your financial picture. Here's why.

Every dollar you earn from part-time work is a dollar you don't have to pull from your portfolio. In the early years of retirement — when sequence of returns risk is at its highest — reducing portfolio withdrawals during a market downturn can meaningfully protect your long-term financial security. I wrote about sequence of returns risk in a recent post, but the short version is this: being forced to sell investments at depressed prices in the early years of retirement can permanently impair a portfolio in ways that are hard to recover from. Part-time income acts as a buffer against that.

Beyond the portfolio protection angle, part-time work also gives your Social Security benefit more time to grow if you haven't claimed yet. Every year you delay claiming between 62and 70 increases your benefit — and if part-time income covers your living expenses in the meantime, you may be able to wait longer than you otherwise could.

There's also a non-financial dimension worth naming: many of my clients who work part-time in retirement report that it provides structure, social connection, and a sense of purpose that full retirement didn't. That's not a financial benefit, but it's a real one.

The Social Security earnings test: the rule most people don't know about

Here's where things get more complicated. If you claim Social Security before your full retirement age of 67 while still earning income, the Social Security earnings test applies —and it can significantly reduce your benefit in the short term.

In 2026, if you're under full retirement age for the entire year, you'll lose $1 in Social Security benefits for every $2 you earn above $22,320. In the year you reach full retirement age, a more generous threshold applies — you lose $1 for every $3 earned above$59,520, and only counting earnings before the month you hit full retirement age.

Once you reach full retirement age, the earnings test goes away entirely. You can earn as much as you want without any reduction to your Social Security benefit.

It's also worth noting that benefits withheld due to the earnings test aren't lost forever. Once you reach full retirement age, Social Security recalculates your benefit upward to account for the months it was withheld. So you do get some of it back — just later. But for cash flow planning purposes in the near term, the earnings testis real and worth knowing about.

The practical implication: if you're planning to work part-time and claim Social Security before 67, run the numbers carefully on what your actual monthly benefit will be after the earnings test applies. It may be meaningfully less than you're expecting.

Taxes: your income picture gets more complex

Part-time work adds earned income to your retirement income mix, and that has tax consequences worth planning for.

First, earned income is subject to self-employment tax or payroll taxes, depending on how you're working. If you're consulting or freelancing — which is common among semi-retired professionals — you'll owe self-employment tax on top of income tax. That's something to factor into your net income expectations.

Second, adding earned income to Social Security, IRA withdrawals, and investment income can push your total income above thresholds that trigger higher Medicare premiums through IRMAA, or increase the portion of your Social Security benefit subject to federal tax. Neither of those is a reason to avoid working — but they're reasons to look at your full income picture holistically rather than in pieces.

On the positive side, earned income in retirement also means you can continue contributing to a Roth IRA —as long as you have earned income, you're eligible to contribute regardless of age. For clients in a lower-income semi-retirement phase, that can be a useful way to continue building tax-free savings.

Medicare and employer coverage

If you're working part-time for an employer that offers health insurance, you'll need to think carefully about how that interacts with Medicare. In general, if you're 65 or older and the employer has fewer than 20 employees, Medicare is primary and the employer plan is secondary. If the employer has 20 or more employees, the employer plan is typically primary.

Getting this wrong can create gaps in coverage or result in Medicare penalties down the road — specifically, a late enrollment penalty for Part B that follows you permanently. If you're in this situation, it's worth a careful review before you make any coverage decisions.

How to build part-time income into your retirement plan

The most important thing I'd tell anyone counting on part-time income as part of their retirement plan is this: plan conservatively. Part-time income is valuable, but it's also less predictable than a salary. Consulting engagements end. Health changes. The freelance market shifts. A retirement plan that works beautifully with $30,000 a year in part-time income but falls apart without it is more fragile than it looks.

I encourage clients to think of part-time income as a welcome supplement rather than a load-bearing pillar of the plan. If it's there, great — it extends your runway, reduces portfolio pressure, and may allow you to delay Social Security. If it goes away, your plan should still hold.

That framing — building a plan that works without the part-time income, then treating that income as a bonus —tends to produce the most resilient retirement outcomes I've seen.

If you're thinking through a phased retirement or semi-retirement and want to understand how the pieces fit together, I'd be glad to work through it with you.

Disclosure

The content of this post is for educational purposes only and should not be construed as personalized financial, tax, or legal advice. This is not an offer to buy or sell securities. No investment process is free of risk and there is no guarantee that the investment process described herein will be profitable. Investors may lose all of their investments. Past performance is not indicative of current or future performance and is not a guarantee. Investment advice offered through IHT Wealth Management, a registered investment adviser.