Next Year's Contribution Limits: How to Plan Ahead

Picture this: the IRS raises the 401(k) limit in November, your open enrollment window closes in December, and by the time you notice your payroll deduction is still set to last year's figure, three months of the new year have already passed. That gap, multiplied across 26 or 52 pay periods, is real retirement money you cannot claw back.

For savers who consistently max out their retirement accounts, the annual contribution limit announcement is one of the most consequential financial calendar events of the year. Yet because it arrives quietly, buried in an IRS revenue procedure rather than splashed across headlines, it is easy to miss. This guide walks through how the indexing system works, what the current limits look like so you have a concrete baseline, when to watch for the official announcement, and the practical steps involved in making sure a raised limit is actually captured in your paycheck.

Before looking forward, it helps to anchor to the current figures. For the plan year in effect today, the key limits are:

• 401(k), 403(b), and most 457(b) elective deferrals: $24,500 per year
• Standard catch-up contribution (age 50 and older): $8,000 additional, bringing the total to $32,500
• Enhanced catch-up contribution (ages 60 to 63 only): $11,250 additional instead of the standard $8,000, bringing the total to $35,750 for savers in that specific age band. This higher limit is a SECURE 2.0 provision that took effect in 2025.
• IRA and Roth IRA combined limit: $7,500 per year (this already includes the $1,000 catch-up for those 50 and older)

These numbers serve as your planning baseline. When next year's announcement arrives, you will be comparing against these figures to know exactly how much more headroom you have gained, if any.

One point worth understanding about 457(b) plans: governmental 457(b) accounts have their own elective deferral limit that mirrors the 401(k) figure, and they also offer a separate and additional catch-up provision in the three years before normal retirement age. If you hold both a 457(b) and a 403(b) or 401(k), those limits can stack, making the autumn announcement especially important for public sector workers and nonprofit employees.

The IRS does not simply decide each year whether limits will rise. The adjustment process is governed by statute and tied to inflation data. Specifically, the IRS uses the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W), published by the Bureau of Labor Statistics, measured over a specific trailing period. The resulting calculation is then rounded to the nearest $500 increment for most plan limits.

That rounding rule is important and often misunderstood. Because limits move in $500 steps, they do not increase every year even when inflation is positive. In a low-inflation environment, the underlying calculated figure might rise by $200 or $300, but because it has not crossed the next $500 threshold, the published limit stays flat. Conversely, in a higher-inflation period, limits can jump by $500 or even $1,000 in a single year. The IRA catch-up contribution, which sits at $1,000, is indexed differently and adjusts in $100 increments.

Think of it like a staircase rather than a ramp. Progress happens in visible steps, not a smooth slope, and sometimes the step is not taken at all in a given year. That unpredictability is exactly why watching for the official announcement matters rather than assuming a raise is coming.

The IRS formalises the new limits each year in a Revenue Procedure, typically released in late October or early November. For reference, the announcement for the current year's limits arrived in Revenue Procedure 2024-25 (for 2025 limits), following the standard autumn timeline. Savers who want to be among the first to know can monitor the IRS newsroom at irs.gov/newsroom or the IRS retirement plans page for the annual update.

One of the more significant structural changes introduced by SECURE 2.0 relates to how higher-earning savers can direct their catch-up contributions. Beginning in 2026, if your wages from the employer sponsoring your plan exceeded $145,000 in the prior calendar year (a figure that is itself subject to indexing), any catch-up contributions you make to a 401(k), 403(b), or governmental 457(b) must go into a Roth account rather than a traditional pre-tax account.

This matters in a few practical ways. First, Roth contributions do not reduce your taxable income in the year you make them, so savers accustomed to a pre-tax catch-up contribution reducing their current tax bill will notice a change. Second, your employer's plan must actually offer a Roth option for this to work. If your plan does not yet have a Roth feature, the IRS issued transitional guidance indicating that employees subject to this rule would simply not be able to make catch-up contributions until the plan adds the Roth option, which created urgency for plan sponsors to update their documents.

The wage threshold is based on the prior year's W-2 Box 1 wages from that specific employer, not your total household income or wages from other jobs. That specificity is easy to overlook. A useful companion read if you are weighing the broader pre-tax versus Roth question is our guide to choosing between a Roth and traditional 401(k), which covers the tax considerations in detail.

Knowing the new limit is only half the equation. The other half is actually getting the updated amount into your paycheck. Employer retirement plans almost universally require you to elect a specific contribution amount or percentage through your HR or benefits portal. Your plan will not automatically increase your deferral because the IRS raised the limit.

Here is where the timing becomes critical. Most employers hold open enrollment in November or December, which conveniently overlaps with when the IRS releases next year's limits. Some plans allow contribution elections to be changed at any time throughout the year, while others restrict changes to specific windows. Knowing which category your plan falls into is a practical first step.

A few things worth understanding about the mechanics:

• Dollar amount versus percentage: If your election is set as a fixed dollar amount, it will not grow with a limit increase unless you manually change it. If it is set as a percentage of pay, a raise in your salary will increase the dollar amount contributed automatically, but that percentage could leave money on the table if the limit rises and your salary does not rise proportionally.
• Front-loading risk: Some savers contribute the maximum as quickly as possible early in the year, which can inadvertently cause them to miss weeks or months of employer matching if the plan uses a per-paycheck match formula rather than a true-up at year-end. This is worth verifying with your HR department. Our post on front-loading your 401(k) and employer match explores this dynamic in detail.
• Multiple plan types: If you contribute to both a 401(k) and an IRA, each has its own limit and its own update process. The IRA does not flow through payroll, so it requires a separate action, typically logging into your IRA provider and adjusting automatic contributions or making a manual contribution before the tax year deadline.

Consider a hypothetical saver, call her Maria, who has been contributing $24,500 to her 401(k) for the past year. When the IRS announces a $500 increase, her new annual limit would be $25,000. If Maria contributes bi-weekly across 26 pay periods and updates her election promptly in January, she captures the full $500. If she forgets until March, she has already missed roughly four pay periods and needs to increase her remaining contributions more steeply to catch up, which may not be possible if her per-pay-period limit is constrained. This is a purely illustrative example to show why timing the payroll update matters.

The IRA limit of $7,500 (including the catch-up for those 50 and older) follows the same indexing framework as the 401(k) limit, but the IRA has more flexibility in timing. IRA contributions for a given tax year can be made any time from January 1 of that year through the tax filing deadline of the following April, without extensions. That means if the new limit is announced in October and you want to maximise your IRA contribution for the upcoming year, you have from January through mid-April of the year after to make it happen.

For higher earners, the Roth IRA income phase-out ranges are also adjusted annually and are worth monitoring alongside the contribution limits. These phase-out ranges determine whether you can contribute directly to a Roth IRA or whether you need to consider an indirect route. If you are in that higher-income category, understanding the backdoor Roth strategy may be relevant as you plan for the year ahead.

One often-overlooked point: if you are self-employed or run a small business, the limits that apply to SEP-IRAs and Solo 401(k) plans are governed by a separate overall annual additions limit (Section 415), which is also indexed to inflation and typically much higher than the employee elective deferral limit. The autumn IRS announcement covers these figures as well, making it equally important for self-employed savers to review the full release, not just the 401(k) headline number.

Because the IRS announcement and most employer open enrollment windows overlap in the October through December period, a proactive approach involves treating the IRS release as a trigger event rather than a nice-to-know detail. Some practical considerations for building this into your annual routine:

• Setting a calendar reminder for late October as a prompt to check irs.gov/newsroom for the revenue procedure. The announcement is typically accompanied by a summary table of all relevant plan limits.
• Reviewing your current payroll election at the same time you check benefits during open enrollment, even if you are not making other benefits changes.
• Contacting your HR or plan administrator if you are unsure whether your plan allows mid-year contribution changes, so you know your options if you miss the open enrollment window.
• Checking whether your plan has a year-end true-up feature for employer matching, which affects whether front-loading versus spreading contributions is more advantageous for your situation.
• Revisiting IRA automatic contributions at the start of each calendar year so they reflect the current limit.

The broader point is that contribution limit planning fits naturally into the same autumn financial review that covers open enrollment benefit elections, tax projections, and year-end investment decisions. Grouping these tasks together reduces the chance that any one of them slips through.

This article is intended for general educational purposes only and does not constitute personalised financial, tax, or investment advice. Contribution limit rules and tax regulations are subject to change. Every individual's financial situation is different, and decisions about retirement contributions, account types, and tax strategies should be made in consultation with a qualified financial adviser or tax professional who can evaluate your specific circumstances.