401(k) planning strategy

A 401 k planning strategy starts with the payroll deferral. Money you send to a traditional 401(k) plan comes out of your pay before federal income tax, so each dollar deferred lowers this year’s taxable wages by a dollar. For 2026 the elective deferral limit is 24,000 dollars for workers under age 50. Once you turn 50 you may add a catch-up of 8,000 dollars, so a 52 year old can move 32,000 dollars off the top of taxable pay in one year. Those deferrals appear in box 12 of your Form W-2 with code D and are left out of the box 1 wages that flow to your return. The IRS summary of the Form W-2 shows how that split is reported, and it is the reason your pay stub and your taxable wage figure do not match.

Picture a single filer who earns 150,000 dollars and defers the full 24,000 dollars into the pre-tax side. Reported wages drop to 126,000 dollars. At a 24 percent marginal rate that deferral cuts about 5,760 dollars from the current federal bill, before any state effect. Lowering box 1 wages can also pull a household under a phase-out line for other tax breaks, so one deferral can do more than one job. These guides serve clients in Austin, Chicago, Los Angeles, Miami, and New York City, and the state result varies widely. A filer in a state with no personal income tax sees only the federal savings, while a California or New York City filer usually keeps more because the deferral also reduces high state tax.

The tax you skip today is not erased. It is postponed, and you pay ordinary income tax when you draw the money later and report it on Form 1040. That trade sits at the middle of the plan. One common mistake is chasing the whole deferral in December, hitting a cash crunch, then pulling money back out at a penalty in February. Set the deferral as a steady share of each paycheck instead of a year-end rush, and check it against real pay stubs. Our tax strategy consulting team sizes the deferral to your bracket, and our bookkeeping team ties it back to payroll during the year. As the limits and your income shift, we reset the number so next year’s deferral still fits your cash flow.

A full 401 k planning strategy also watches the total that can land in the account. Beyond your own deferral, employer money and any after-tax contributions count toward a separate annual additions cap, which for 2026 is 71,000 dollars before the age-50 catch-up. Most employees never approach that ceiling, but higher earners with a generous match sometimes do. If you switch jobs mid-year, both employers may let you defer, yet the elective deferral limit follows you as one person and not one per plan, so it is easy to over-defer by accident. When that happens you have to ask for the excess back before the April deadline or face tax on the same dollars twice. We track deferrals across every W-2 you receive so the total stays under the line. Getting the number right this year keeps next year’s growth working for you rather than triggering a correction.

Timing inside the year matters as much as the yearly total. Because the deferral comes out of each paycheck, a raise or a bonus in the second half of the year changes how much room is left to reach the limit before December. Someone who starts deferring only in September has to set a much higher percentage to hit the cap, and a few plans limit the percentage you can elect per check. If the goal is the full 24,000 dollars, spreading it from January forward is easier on cash flow than a fourth-quarter sprint. A bonus can often be deferred as well, which turns a lump of highly taxed pay into retirement savings. We map the deferral schedule against your expected pay so the target is met without a scramble, and we revise the plan the moment your pay changes. Small adjustments in the spring beat large corrections in December.

Many modern plans let you split each paycheck between a pre-tax bucket and a Roth bucket, and that choice is the heart of any 401 k planning strategy. Pre-tax deferrals lower your taxable wages now and are taxed as ordinary income when you withdraw. Roth deferrals give you no break today because they come out of after-tax pay, but qualified withdrawals in retirement, including all the growth, come out free of federal income tax. The dividing question is your tax rate now against your expected rate later. If you sit in a high bracket during your peak earning years and expect a lower rate in retirement, the pre-tax side usually wins. If you are early in your career or in an unusually low year, the Roth side often wins because you lock in today’s lower rate.

Run the numbers on a 35 year old in the 22 percent bracket who can afford 20,000 dollars a year. Put in the Roth side, that money grows for 30 years and the whole balance is spendable without a future tax bill. The same 20,000 dollars in the pre-tax side saves about 4,400 dollars in current federal tax each year, but every future dollar of withdrawal is taxable. There is no single right answer. Many clients split the difference and build both buckets so they can steer their taxable income in retirement, a move sometimes called tax diversification. When you eventually take distributions, the plan reports them on Form 1099-R, and the pre-tax and Roth portions carry different codes.

The Reed Corporation is a CPA and tax firm, not a registered investment adviser. We plan the tax side of the pre-tax and Roth split and coordinate with your own licensed financial advisor on how the balance is invested. That line matters because the deferral decision is a tax decision, while the fund selection is an investment decision that belongs with your advisor. We model the bracket math and the projected retirement income, then hand the investment mix to the professional who manages it. Our tax strategy consulting work centers on exactly this kind of rate comparison, and we build it around the numbers on your own return.

One point clears up a lot of confusion. The Roth 401(k) has no income limit, unlike a Roth IRA, so high earners who are shut out of a Roth IRA can still build Roth money through the plan at work. That makes the workplace Roth bucket a rare option for people in the top brackets who want tax-free growth. State tax adds another layer. A worker in Miami or Austin pays no state income tax on either the deferral or the later withdrawal, so a pre-tax break is worth only the federal rate there. A worker in New York City or Los Angeles gets a state break now on a pre-tax deferral, but a future move to a no-tax state could make Roth look smarter in hindsight. We factor a likely retirement location into the pre-tax and Roth call, because where you live when you withdraw changes the answer.

The common mistake is treating the choice as permanent. It is not. You can change the pre-tax and Roth split for future paychecks whenever your income changes, and a year with a bonus or a business loss is a natural time to revisit it. Another slip is pouring everything into Roth during peak earning years and paying tax at a top rate you will never see again in retirement. We review the split each year against your projected bracket and report the result on your individual tax return. As your income and the tax law change, the right mix will change with them, and we adjust before the next payroll cycle locks it in.

A 401 k planning strategy tracks two separate ceilings, and mixing them up is where people trip. The first is your own elective deferral limit, 24,000 dollars in 2026 plus the 8,000 dollar catch-up at age 50. The second is a larger annual additions cap, 71,000 dollars in 2026, that counts your deferral together with the employer match and any after-tax contributions. The employer match sits inside the bigger cap, not the smaller one, so a match never eats into how much you can personally defer. A typical match might be 100 percent of the first 3 percent of pay and 50 percent of the next 2 percent, which works out to 4 percent of pay when you contribute at least 5 percent. That match is a return on your salary that you only receive if you contribute enough to trigger it.

Take an employee earning 120,000 dollars whose plan matches up to 4 percent. Contributing at least 6,000 dollars unlocks the full 4,800 dollar match, money that would otherwise be left behind. If that same worker stops deferring in October after hitting a personal savings target, they may miss the match on November and December pay, since many plans fund the match per pay period rather than once a year. Spreading deferrals evenly across all 26 paychecks protects the full match. The match itself is not taxed to you when it goes in. It grows tax-deferred and is taxed later as ordinary income, the same as your pre-tax deferrals.

Vesting is the catch. Your own deferrals are always 100 percent yours, but employer money can vest on a schedule, sometimes over three to six years. If you leave before you are fully vested, you forfeit the unvested match. Before you change jobs, check your vesting percentage, because staying an extra few months can be worth thousands of dollars. Employers report your wages and the plan codes on the Form W-2, and the IRS small business and self-employed center explains the employer side of plan rules for owners who sponsor a plan.

Two more features change the match math. Some plans add a true-up at year end, a make-up payment for anyone who front-loaded deferrals and stopped early, so check whether your plan offers one before you spread contributions. Many plans also add a profit-sharing contribution on top of the match, which is employer money that counts toward the annual additions cap rather than your deferral limit. High earners face one more test. Plans run nondiscrimination checks each year, and if too much of the plan’s savings comes from highly compensated employees, some of their deferrals can be handed back as a corrective distribution. A safe harbor plan design sidesteps that test by promising a set employer contribution. If you receive a refund of deferrals in the spring, it usually points to a failed test rather than a mistake of your own. We read the plan document so the match and any testing risk are clear before the year starts, and so any profit-sharing layer is planned rather than a surprise.

The frequent mistake is over-deferring across two jobs in the same year. The elective limit is one figure per person, not one per plan, so someone who changes employers and keeps their old deferral percentage can pass 24,000 dollars without noticing. You then must request the excess back by April 15 or the same dollars get taxed twice. If you owe tax on a corrected distribution, you may also need to true up your payments through Form 1040-ES. We reconcile deferrals across every W-2 and catch an over-contribution before the deadline. Planning the match and the limits together each year keeps free employer money on the table and penalties off it.

A 401(k) loan and an early withdrawal are not the same event, and the tax gap between them is large. A plan loan lets you borrow up to the lesser of 50,000 dollars or half your vested balance, and it is not taxed when you take it because you pay it back with interest to your own account. An early withdrawal, by contrast, is a real distribution. If you are under age 59 and a half, it is taxed as ordinary income and usually carries an added 10 percent penalty on top. That combination can be brutal. Pull 40,000 dollars at age 45 in the 24 percent bracket and you could owe about 9,600 dollars in income tax plus a 4,000 dollar penalty, leaving you roughly 26,400 dollars from a 40,000 dollar draw before any state tax.

The plan withholds 20 percent of most distributions up front and reports the payout on Form 1099-R. That 20 percent is only a deposit against the final bill, not the whole tax, so a large withdrawal can still leave a balance due in April. If you expect that, you may need to raise your other payments or send estimates, and Publication 505 on tax withholding and estimated tax walks through the math. A few exceptions can waive the 10 percent penalty, such as total disability or a series of substantially equal payments, and the distribution rules are laid out in Publication 590-B.

A loan looks cheaper, and often is, but it hides a risk. If you leave the job while a loan is outstanding, many plans treat the unpaid balance as a deemed distribution. The remaining loan then becomes taxable and, if you are under 59 and a half, penalized, exactly the outcome you were trying to avoid. You usually have until your tax filing deadline to roll the offset amount into an IRA and dodge the tax, but only if you have the cash to replace it. That timing trap catches people who borrow, then change jobs a year later without a plan to repay.

There is a middle path between a loan and a full cash-out. A hardship withdrawal lets you take money for an immediate and heavy financial need, such as certain medical bills or a home purchase, but it is still taxed and usually penalized if you are under 59 and a half. Newer rules also allow a small penalty-free emergency withdrawal of up to 1,000 dollars once a year, which you can repay to restore the account. Neither is free money. A 15,000 dollar hardship draw at a 22 percent rate still costs about 3,300 dollars in tax plus a 1,500 dollar penalty. Before you file for a hardship, look at whether a plan loan or a short delay solves the same problem for less. We run the after-tax cost of each path so the cheapest one is clear. Reaching for the account should be the last move rather than the first.

The common mistake is treating the 401(k) as an emergency fund. Every dollar you remove early loses both its future growth and a slice to tax and penalty, and you cannot put it back beyond the normal annual limits. Before you touch the account, we look at whether a plan loan or an outside source costs less after tax, and we report any distribution correctly on your individual tax return. If you are weighing a withdrawal against a tax bill or a debt, request a consultation before you file the paperwork, because the order of those moves changes the cost. Planning the exit before you need the money keeps a short-term gap from becoming a lasting setback.

A 401 k planning strategy that ignores the exit gives back much of the gain, because the moment you separate from an employer you have four ways to handle the balance and they carry different tax results. You can leave the money in the old plan, roll it into your new employer’s plan, roll it into an IRA, or cash it out. The first three are generally tax-free if done as a direct rollover, where the money moves trustee to trustee and never touches your hands. Cashing out is the expensive path, taxed as ordinary income and, before age 59 and a half, hit with the 10 percent penalty. The contribution and rollover rules for the receiving IRA are set out in Publication 590-A.

The direct rollover matters because of a withholding trap. If you take the money as a check made out to you, an indirect rollover, the plan must withhold 20 percent, and you then have 60 days to deposit the full original amount into an IRA, including the 20 percent the plan already sent to the IRS. Miss the 60 days and the whole sum becomes a taxable distribution. Roll 200,000 dollars the wrong way and 40,000 dollars is withheld, so you must find 40,000 dollars of other cash to complete a full rollover or that piece is taxed and possibly penalized. Ask for a direct trustee-to-trustee transfer and the withholding problem disappears. Distributions and rollovers are reported to you on Form 1099-R, and the distribution rules sit in Publication 590-B.

An in-plan Roth conversion is a different lever. If your plan allows it, you can move pre-tax money into the Roth side of the same plan, but you pay ordinary income tax on every dollar converted in the year you do it. The appeal is future tax-free growth. The risk is a large current bill, so timing is everything. Converting 50,000 dollars in a high-income year at a 32 percent rate costs about 16,000 dollars in federal tax, while doing the same conversion in a gap year between jobs at a 12 percent rate might cost 6,000 dollars. Spreading conversions across several low-income years often beats one large conversion, and paying the tax from outside cash rather than from the converted balance keeps more money growing.

Two rules trip people during a rollover. First, if you hold company stock inside the 401(k), a special treatment called net unrealized appreciation can tax the growth at lower capital gain rates instead of ordinary rates, but only if you move the shares correctly, so pause before you roll employer stock into an IRA. Second, once the money is in a traditional IRA, future withdrawals follow the IRA rules, and required minimum distributions eventually force taxable withdrawals in your seventies. Roth money in a Roth IRA has no lifetime required distribution, which is one more reason some savers convert. A retiree who rolls 500,000 dollars into an IRA should plan the withdrawal order across accounts to keep later tax low. We build that drawdown map with your advisor so the rollover you make today fits the income plan for later years.

The common mistake is the accidental cash-out. Someone leaves a job, takes the check to move it alone, misses the 60-day window, and turns a routine rollover into a taxed and penalized event. Another is converting to Roth in a peak year and handing the government tax at a top rate. We map the rollover route and the conversion timing against your bracket for the year, and our tax strategy consulting team coordinates the paperwork with your financial advisor so nothing slips past a deadline. Plan the move before you request the check, and the transition adds to the account rather than shrinking it.