Pay Stub Abbreviations Explained: FIT, FICA, YTD & Net Pay

FIT or FWT means federal income-tax withholding; OASDI or SS means Social Security; MED or MEDI usually means Medicare; YTD means year to date. The same abbreviation can appear beside a current-period amount, a year-to-date total or an employer contribution. Read the column heading before treating a number as money taken out of this paycheck.

This walkthrough helps you read the statement from earnings to take-home pay. If you only need to identify one label, use the paystub code lookup, which includes alternative labels such as RES SIT and FICA HI. Employer-specific codes still need to be confirmed with payroll.

Read These Columns First

Do not add the current and YTD columns together. For example, $62 in current Social Security and $620 YTD usually describes one $62 withholding within a running $620 total, not a $682 deduction.

Earnings Abbreviations

For covered nonexempt employees, the federal overtime rule generally requires at least 1.5 times the regular rate after 40 hours in a workweek. A two-week pay period does not allow the hours of its two workweeks to be averaged for this purpose. State rules or agreements may provide additional entitlements. See the Department of Labor’s overtime guidance.

Tax Withholding Abbreviations

These labels describe tax withholding. Compare the employee current-period column when reconciling this payment.

Federal Taxes

The Social Security Administration publishes the 2026 wage base and Social Security/Medicare rates. The IRS explains Additional Medicare withholding and federal income-tax withholding methods. A federal tax bracket is not a percentage to apply to every dollar on a paycheck.

EIC/EITC is not a routine current payroll deduction. It is a tax credit claimed on a return when eligible. The old federal advance-payment program ended after 2010; an EIC label on an old statement needs that historical context. See IRS Publication 596 and the IRS’s notice in its 2010 Publication 3.

State and Local Taxes

Deduction Abbreviations

These are voluntary or employer-required deductions:

Health and Insurance

HSA, FSA and HRA are different arrangements, not interchangeable names for one deduction. The IRS explains their funding and tax rules in Publication 969.

Retirement

Other Deductions

Illustrative Pay Stub Example

This fictional weekly example shows how the columns reconcile. It assumes $1,000 of covered wages, no state/local withholding, no other benefits, and a $50 traditional 401(k) salary deferral. FIT of $80 is an illustrative amount already reported by payroll, not a calculated tax recommendation. The earlier nine checks are assumed identical solely to make the YTD arithmetic easy to follow.

EARNINGS          HOURS    RATE     CURRENT     YTD
REG               40.00    $25.00   $1,000.00   $10,000.00
GROSS PAY                           $1,000.00   $10,000.00

EMPLOYEE TAXES                CURRENT     YTD
FIT                           $80.00      $800.00
SS/OASDI                      $62.00      $620.00
MED                           $14.50      $145.00

EMPLOYEE DEDUCTIONS            CURRENT     YTD
401K (traditional)            $50.00      $500.00

NET PAY                       $793.50     $7,935.00

Current net pay is $1,000 − $80 − $62 − $14.50 − $50 = $793.50. The employer’s own Social Security and Medicare contributions, if displayed elsewhere, are not subtracted a second time.

The traditional 401(k) contribution reduces federal income-tax wages in this example to $950 but leaves Social Security and Medicare wages at $1,000. Taxable wage bases differ by deduction type; do not subtract every “pre-tax” benefit from every tax base. The IRS explains this distinction under elective deferrals in Publication 525.

How to Verify Your Pay Stub

Step 1: Check Gross Pay

Match each earnings line to your hours, rate and pay period. Review overtime by workweek and check any bonuses, tips or retroactive adjustments separately.

Step 2: Verify Federal Tax (FIT)

Compare your W-4 elections and pay frequency. The IRS Tax Withholding Estimator helps review annual withholding; a flat percentage of gross pay does not verify this line. Ask payroll to explain the wage base and method behind a disputed amount.

Step 3: Verify FICA

• SS: covered Social Security wages × 6.2%, subject to the 2026 wage base.
• MED: Medicare-covered wages × 1.45%, with additional withholding where applicable.
• Check whether FICA is a summary of SS and MED before adding it again.

Step 4: Check State Tax (SIT)

Identify the state or locality on the line, then consult its current withholding instructions or ask payroll. A marginal tax bracket alone is not a withholding calculation. Our calculator directory explains available estimates; many tools do not include state or local withholding and cannot verify that part of your statement.

Step 5: Confirm Deductions

Match amounts against benefit elections and check employee versus employer columns. Keep the original statement unchanged. When asking payroll about an unfamiliar line, include its code, current amount, YTD amount and pay date through your employer’s secure channel.

Frequently Asked Questions

What does OASDI mean on my pay stub?

OASDI stands for Old-Age, Survivors, and Disability Insurance, the Social Security program. For employees in 2026, the rate is 6.2% of covered Social Security wages up to $184,500. Covered wages need not equal the gross-pay line.

What is FIT on a pay stub?

FIT stands for Federal Income Tax. It's the amount withheld from your paycheck based on your W-4 form (filing status, dependents, and any additional withholding you requested). The amount varies per person.

Why do I see both SS and OASDI on my stub?

Both labels can refer to Social Security, but two appearances do not by themselves prove two deductions. One may be a summary, employer contribution or YTD display. Compare the section and column headings, then ask payroll if both amounts actually reduce current net pay.

What does YTD mean?

YTD stands for Year-to-Date. It shows the cumulative total of each category from January 1 through the current pay period. This helps you track annual earnings and tax withholdings.

What's the difference between pre-tax and post-tax deductions?

A pre-tax deduction reduces the wage base for one or more taxes, not necessarily every tax. Traditional 401(k) salary deferrals generally reduce federal income-tax wages but not Social Security or Medicare wages. Roth 401(k) contributions do not reduce current federal income-tax wages. Check the specific benefit rules instead of relying on the label alone.

Need an original statement first? Follow our paystub retrieval guide. To organize genuine figures for your own review, you can open an editable earnings draft. It does not retrieve employer records or replace an employer-issued statement.