What Are Total Pretax Contributions and How Do They Work?

Total pretax contributions are the dollars your employer removes from your gross pay before calculating federal and state income tax withholding, then routes into qualifying accounts such as a 401(k), 403(b), 457(b), health savings account, or flexible spending account. Because those amounts come out first, they lower the wages your employer reports in Box 1 of your W-2, which is the figure the IRS taxes. For 2026, employees can defer up to $24,500 into a workplace retirement plan, with higher limits available at older ages, and can add pretax deductions for health insurance premiums, HSAs, and FSAs on top of that.

What Counts Toward the Total

The line labeled “total pretax contributions” on a paystub or year-end summary is usually a rollup of two categories: retirement deferrals and certain health-related benefits paid through a Section 125 cafeteria plan.1Internal Revenue Service. FAQs for Government Entities Regarding Cafeteria Plans

On the retirement side, these workplace plans accept pretax salary deferrals:

  • 401(k) plans, the most common private-sector option.
  • 403(b) plans, for employees of tax-exempt organizations and public schools.2Office of the Law Revision Counsel. 26 USC 403 – Taxation of Employee Annuities
  • 457(b) plans, for state and local government employees.
  • SIMPLE IRAs, used by smaller employers, with a lower deferral limit.

On the health side, common pretax deductions include employer-sponsored medical, dental, and vision premiums; contributions to a Health Savings Account if you have a qualifying high-deductible plan; and contributions to a Flexible Spending Account for eligible medical expenses.

Employer matching contributions do not count against your personal deferral limit, and they aren’t part of your taxable income until you withdraw them in retirement.3Internal Revenue Service. Retirement Plan FAQs Regarding Contributions They also aren’t part of your “pretax contributions” figure in the sense that reduces your Box 1 wages, because they were never in your paycheck to begin with.

Because different employers label the line differently, check whether the figure on your paystub covers only retirement deferrals or includes health-related deductions as well. That determines what you compare against annual IRS limits.

What They Reduce, and What They Don’t

Your employer starts with gross pay, subtracts pretax contributions, then applies federal and state income tax withholding to what’s left. The reduced figure lands in Box 1 of your W-2, so you owe less income tax for the year.4Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026)

Pretax retirement contributions do not, however, reduce your Social Security and Medicare taxes. Your employer withholds Social Security tax at 6.2 percent and Medicare tax at 1.45 percent on the full wage amount, including the portion you defer into a retirement plan.3Internal Revenue Service. Retirement Plan FAQs Regarding Contributions That’s why the “Medicare wages” figure in Box 5 of your W-2 is usually higher than the “Wages” figure in Box 1: the difference is roughly your pretax retirement contributions.

Lowering Box 1 wages also lowers your Adjusted Gross Income for the year, which can help you qualify for other tax benefits that phase out at higher income levels.

2026 Contribution Limits

The IRS sets annual caps on how much you can defer pretax. For 2026:5Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500

  • 401(k), 403(b), and 457(b) standard deferral: $24,500.
  • Age 50+ catch-up: an additional $8,000, for a total of $32,500.
  • Ages 60 through 63 enhanced catch-up: an additional $11,250 instead of $8,000, for a total of $35,750. Once you turn 64, you return to the standard $8,000 catch-up.6Internal Revenue Service. COLA Increases for Dollar Limitations on Benefits and Contributions
  • SIMPLE IRA: $17,000, with a $4,000 catch-up at age 50 and a $5,250 catch-up at ages 60 through 63.

Pretax and Roth deferrals share the same combined cap. If you split contributions between the two, your total across both cannot exceed the annual limit.

Health-related pretax accounts have their own limits. In 2026, you can contribute up to $4,400 to an HSA for self-only coverage or $8,750 for family coverage,7Internal Revenue Service. Expanded Availability of Health Savings Accounts Under the One, Big, Beautiful Bill Act and up to $3,400 to a health FSA, with up to $680 carrying over to the next year if your plan allows it.8Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026

A separate ceiling caps everything going into a single defined-contribution plan in one year, including your deferrals plus employer match and any other employer contributions. For 2026, that combined ceiling is $72,000.9Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs, Notice 2025-67

Where to Find the Figure on Your W-2 and Paystub

Pretax retirement deferrals appear in Box 12 of your W-2 with a letter code identifying the plan:4Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026)

  • Code D for 401(k) deferrals.
  • Code E for 403(b) deferrals.
  • Code G for 457(b) deferrals.
  • Code S for SIMPLE IRA salary reductions.
  • Code W for HSA contributions, including your own salary reductions and your employer’s contributions.

Those amounts are already excluded from Box 1 wages, so Box 12 is where you verify how much went into each account for the year. Your regular paystubs will show the same deductions under a heading such as “retirement” or “deductions,” typically with both current-period and year-to-date totals. Compare the year-to-date figure on your final paystub against Box 12 to make sure they match. Fixing a discrepancy before you file is far easier than amending later.

The Taxes Come Later

The tax break on pretax contributions is a deferral, not a permanent exclusion. Every dollar you withdraw from a pretax retirement account in retirement is taxed as ordinary income in the year you take it out.10Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions

Withdrawing before age 59½ generally adds a 10 percent early-withdrawal penalty on top of the income tax. Several exceptions can waive that penalty, including leaving your job in or after the year you turn 55 (age 50 for qualified public safety employees), total disability, distributions to a beneficiary after death, and a series of substantially equal periodic payments. Even when the penalty is waived, the withdrawal is still taxed as ordinary income.

You also can’t defer indefinitely. Starting at age 73, you must begin taking Required Minimum Distributions from traditional 401(k)s, 403(b)s, and Traditional IRAs each year. If you miss the full RMD by the deadline, the IRS charges an excise tax of 25 percent on the shortfall, reduced to 10 percent if you correct it within two years.11Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs

If Your Total Goes Over the Limit

Excess deferrals can happen if you switch jobs midyear and contribute to two different 401(k) plans without coordinating the totals. If the excess is returned to you by April 15 of the following year, it’s simply added to your taxable income for the year you earned it.

Miss that deadline and the same dollars get taxed twice: once in the year you contributed them, and again when you eventually withdraw them.12Internal Revenue Service. 401(k) Plan Fix-It Guide – Elective Deferrals Weren’t Limited to the Amounts Under IRC Section 402(g) Late corrective distributions can also trigger the 10 percent early-withdrawal penalty and mandatory 20 percent withholding. If your year-to-date total on your December paystub is approaching the annual limit and you started a new job during the year, this is worth checking before the calendar closes.