What to Do With an Old 401(k)

Four options, and the tax consequences that separate them.

Leaving a job leaves a decision behind. Shetland Financial is a fee-only CPA firm and registered investment advisor in Center Valley, PA, and this is one of the more common conversations we have. You work directly with Kevin Dodgson, CPA, CFA, CFP®.

There are four things you can do with a 401(k) from a former employer, and they are not equally good.

1. Leave it where it is. Often permitted if the balance is above a threshold the plan sets. Costs nothing to do, which is why it is what most people do. The drawbacks are that you keep whatever investment menu and fees that plan happens to have, and that balances scattered across three former employers are difficult to manage coherently. Occasionally the old plan is genuinely excellent and leaving it is right. Worth checking rather than assuming either way.

2. Roll it into your new employer plan. Consolidates things, keeps the money in a workplace plan, and preserves some features that matter if you are still working later in life. Depends entirely on whether the new plan is any good.

3. Roll it into an IRA. The usual choice. Opens up the whole investment universe rather than a menu of a dozen funds, generally reduces cost, and makes coordinated management possible. It also has consequences worth understanding before you act: it can complicate later backdoor Roth contributions, and creditor protection for IRAs is governed by state law rather than the federal protection that applies to workplace plans.

4. Cash it out. Almost always the expensive answer. The distribution is taxable as ordinary income, potentially pushing you into a higher bracket in a single year, and an additional early-withdrawal penalty generally applies if you are under the relevant age. The lost future growth is usually larger than the tax.

The mistakes that cost real money

Taking the check yourself. A direct rollover moves the money between institutions and nothing is withheld. An indirect rollover pays you, with mandatory withholding taken out, and you then have a limited window to deposit the full original amount, including the part that was withheld and that you do not currently have. People miss the window and turn a routine transfer into a taxable distribution. Always ask for a direct, trustee-to-trustee transfer.

Rolling pre-tax money into a Roth without planning it. This is a conversion, and the whole amount is taxable in the year you do it. Sometimes an excellent idea, particularly in a low-income year. Sometimes a large avoidable tax bill. The difference is whether anybody ran the numbers first.

Overlooking company stock. If your 401(k) holds appreciated stock in your former employer, there is a specific treatment for the unrealized appreciation that can be considerably more favorable than a standard rollover. It is easy to lose by rolling everything over reflexively, and it cannot be undone afterwards.

Leaving it in cash after the rollover. Money that arrives in a new IRA is not automatically invested. It sits in cash until somebody buys something. Balances sit uninvested for months this way, which is an expensive form of doing nothing.

Why the tax side matters here

Every option above is a tax decision as much as an investment decision. Whether a conversion makes sense depends on your bracket this year and your expected bracket later. Whether cashing out is defensible depends on your whole return. Because we prepare the return and manage the portfolio, that analysis happens once, with the actual numbers, rather than being split between an advisor who cannot see your tax position and an accountant who finds out in April.

If you are approaching retirement rather than changing jobs, our pre-retirees and retirees page covers the wider sequence of decisions, and our retirement planning page covers withdrawal strategy in detail.

What you get

A straight comparison of the four options. Run against your actual bracket rather than a general rule.

The avoidable errors avoided. Direct transfer, conversion timing, and company stock handled deliberately.

Invested when it lands. Not left sitting in cash while everyone assumes someone else has dealt with it.