Honeywell After-Tax 401(k) Contributions: Limits, Records, and Roth Questions

Three buckets, one paycheck

The word “after-tax” on the payroll screen is only half a sentence

Picture an engineer who hits the regular 401(k) deferral limit in October and still wants to keep saving from the last paychecks of the year. The payroll screen offers an after-tax election, and it is tempting to treat that single label as a complete plan. It isn’t. Honeywell’s current public retirement page says covered participants can contribute up to 30% of eligible pay in combinations of pretax, Roth 401(k), and after-tax contributions, subject to IRS and plan limits—so an after-tax election is really one of three buckets that can share the same paycheck, each with its own rules for what happens next.

That “what happens next” is the part the label leaves out. After-tax money becomes genuinely useful only when you know whether the plan lets you withdraw or convert it, how often that can happen, and how the earnings get separated from your after-tax basis. Honeywell’s public page establishes the contribution categories; it does not publicly establish that every participant can complete an in-plan Roth conversion or an in-service distribution. The IRS is clear that plan terms decide whether in-plan Roth rollovers are available at all—which means the Fidelity screens, the SPD, and the current plan notices, not the payroll percentage, hold the real answer.

Where the useful question starts

Give every source of money its own line before you move anything

The interesting question begins after the regular 401(k) limit, not before it, and it turns on a single habit: keeping the sources apart. Elective deferrals, employer contributions, catch-up contributions, and after-tax contributions each deserve their own line in your records. Once those buckets are visible as distinct balances rather than one undifferentiated total, you can actually test a conversion or rollover—asking how much of a given amount is your own after-tax basis and how much is taxable earnings.

If a conversion or distribution is available to you, do the modeling before you submit anything. Work out the taxable earnings, the destination accounts, the withholding, and the year in which income would be recognized, so that the transaction confirms what you expected instead of surprising you. A short stack of documents keeps the whole exercise honest:

• Current Honeywell 401(k) SPD
• Pretax, Roth, and after-tax source balances
• Year-to-date employee and employer contributions
• Fidelity conversion and distribution options
• Tax-basis and rollover confirmations

A contribution option isn’t a conversion option

Flexibility is only real if the basis trail survives it

It is worth being precise about the limits of the public page. It describes contribution categories, but it does not describe every operational conversion or withdrawal feature—and it does not publish every rule for every population. Certain U.S. employees in the publicly described Honeywell 401(k) Plan are the readers it speaks to; highly compensated employees, union groups, acquired populations, FM&T, Puerto Rico, non-U.S. employees, and other participating units may face different limits or features entirely. The ability to contribute after-tax dollars is not, by itself, a promise that you can convert them.

So the finish is a paper trail rather than a clever maneuver. Keep the confirmations that show what went in, what moved, what portion was taxable, and where each amount landed. Note the after-tax contributions as their own plan source, separate from Roth 401(k) deferrals even though both are made after income tax—they carry different tax and distribution mechanics. That record is what turns a promising contribution feature into a manageable long-term strategy instead of a recordkeeping headache.

This guide provides general education for Honeywell employees. It is not individualized financial, investment, tax, legal, benefits, or securities-law advice and is not a recommendation to buy, hold, sell, exercise, transfer, roll over, or donate an asset.