Every autumn, retirement savers start asking the same question: how much more will I be allowed to put away next year? For 2027, there is already a credible estimate on the table, even though the official answer has not arrived. Benefits consulting firm Milliman, in its 2027 IRS limits forecast published in mid-September 2026, projects that the employee deferral limit for 401(k), 403(b) and governmental 457 plans could climb to $25,500, up $1,000 from $24,500 in 2026.
That projection is not law, and it could still change. But the timing is useful: you still have about two and a half months to make smart moves in 2026, and you can begin planning for a bigger 2027 contribution now. This guide covers what is known, what is only forecast, and how to use the rest of the year well.
The 2026 limits you can use today
Start with what is settled. For 2026, the 401(k) employee contribution limit is $24,500. The catch-up contribution for workers age 50 and older is $8,000, and the IRA contribution limit for 2026 is $7,500. These are the numbers that apply to contributions you make between now and December 31 for 401(k) plans.
If you are not yet on track to reach your limit, there is time to adjust. Retirement plan deferrals generally have to come out of paychecks dated within the calendar year, so the last few pay periods matter.
What Milliman is projecting for 2027
Milliman’s forecast, which was based on August inflation data, projects the following for 2027:
- 401(k), 403(b) and 457 employee deferral limit: $25,500, up from $24,500.
- Catch-up contribution (age 50 and older): likely $8,500, up from $8,000.
- Higher catch-up (ages 60 to 63): projected to rise by $500 to $11,750.
Those figures come with a caveat. The forecast noted that if September inflation turned out lower than needed, the deferral limit could come in at $25,000 and the catch-up could stay at $8,000. The adjustments depend on a cost-of-living formula tied to consumer price data, which is why estimates move as new inflation reports come in.
When will the numbers be official?
The IRS typically announces the next year’s retirement plan limits in late October or early November, after the September inflation data are released. As of October 16, 2026, we have not verified an official IRS announcement of the 2027 limits, so treat every 2027 figure above as a projection. Check IRS.gov for the final notice, and look for your employer plan’s updated limit once it is published.
Why the limits rise, and why it matters to you
Many retirement limits are indexed to inflation, which means they tend to creep upward when prices rise. A higher cap does not oblige you to save more, but it creates room for those who can. For high savers, such as people trying to catch up late in their careers, an extra $1,000 of tax-advantaged space can add up over a decade of compounding.
For most Americans, however, the limit is not the binding constraint. The question is not whether you can contribute $25,500, but whether you are contributing enough to get your full employer match and to build toward a realistic retirement target. Think of the IRS limit as a ceiling, not a goal.
Year-end saving moves to consider before December 31
1. Capture your full employer match
If your employer matches contributions, confirm that you are deferring enough to receive the full match. Missing it is like leaving part of your compensation on the table. If your match is calculated per paycheck, front-loading contributions early in the year can sometimes cause you to miss match dollars later, so review your plan’s rules.
2. Raise your deferral rate for the last pay periods
If you have room under the 2026 limit, you can increase your percentage for the remaining paychecks. Log into your plan and check your year-to-date contributions. Make sure the change takes effect before your last December payroll cutoff, since processing can take a cycle or two.
3. Use catch-up contributions if you qualify
Workers who are 50 or older in 2026 can add the $8,000 catch-up on top of the standard limit. Be aware that rules around how catch-up contributions are treated for higher earners have been changing under recent federal legislation, including requirements that some catch-up amounts be made on a Roth basis. Ask your plan administrator how this applies to you.
4. Decide between pre-tax and Roth
Traditional contributions reduce taxable income now and are taxed when withdrawn. Roth contributions are made with after-tax dollars and can be withdrawn tax-free in retirement if rules are met. A mix can give you flexibility. If you expect to be in a higher bracket later, Roth may deserve more weight; if you need the deduction now, traditional may fit better.
5. Do not forget your IRA
You can generally make 2026 IRA contributions up to the tax filing deadline in 2027, which gives you time beyond December 31. The 2026 limit is $7,500. Eligibility for deductions or Roth contributions depends on income and whether you are covered by a workplace plan, so check the rules or ask a tax professional.
6. Rebalance and review your investments
Year-end is a natural time to check whether your portfolio has drifted from your target mix. Review your target-date or index funds, compare fees, and confirm your beneficiaries are current. These steps cost nothing and can prevent bigger problems later.
7. Protect your emergency fund first
Saving aggressively for retirement works best when you are not forced to raid the account for a surprise bill. Early withdrawals from retirement accounts can trigger taxes and penalties. If your cash cushion is thin, balance your priorities. Many households aim to keep several months of essential expenses in cash, though the right amount depends on your job stability and obligations.
What you can do / what to watch next
- Watch for the IRS announcement. It is expected in late October or early November. Once it is published, update your 2027 payroll deferral election to match your goals.
- Plan a January raise to your savings rate. If you receive a raise or bonus, consider directing a portion to your plan. Automatic escalation features, if offered, can do this for you.
- Check your plan’s calendar. Some employers allow changes only during certain windows, and open enrollment for benefits is happening now at many companies.
- Revisit your tax withholding. If your income changed this year, run a quick checkup so you are not surprised at filing time.
- Talk to a professional if your situation is complex. Self-employed workers, high earners and people with multiple plans face extra rules.
The bottom line
The 2027 numbers are a forecast, not a promise. If Milliman is right, savers will be able to defer up to $25,500 next year, with larger catch-up amounts for older workers. But the best move this fall does not depend on the final figure: capture your match, use the remaining 2026 paychecks wisely, keep an emergency cushion, and be ready to adjust in January when the official limits are published. Small, consistent steps now will do more for your retirement than waiting for the perfect number.
Sources: Milliman 2027 IRS limits forecast as reported by 401(k) Specialist (September 2026); 2026 limits as reported by 401(k) Specialist. Projections are not official IRS figures.
This article is for information only and is not financial advice.
