What Is OASDI on My Paycheck in 2026? The 6.2% Social Security Line Explained

If you see OASDI on your paycheck and have no idea what it means, you are looking at one of the most common payroll labels in the US. It sounds bureaucratic, but the money itself is usually simple.

OASDI is usually the Social Security tax line. Employers often use “OASDI,” “Social Security,” or “FICA-SS” for the same deduction. It is separate from federal income tax withholding, and it follows a cleaner formula than most people expect.

For 2026, the number to know is 6.2%. That is the standard employee OASDI rate on wages, up to the annual Social Security wage base of $184,500. After that limit with one employer, the OASDI line usually stops for the rest of the year.

What OASDI means on your paycheck

OASDI stands for Old-Age, Survivors, and Disability Insurance. That is the formal name for the Social Security program funded through payroll taxes.

On a pay stub, the label can vary, but the meaning is usually the same. Payroll systems are messy about naming, not usually about the rule itself. If you see one of the labels below, you are almost always looking at the employee Social Security tax.

That employer match does not show up as extra cash in your paycheck, but it is still part of the total payroll tax attached to your wages.

How OASDI is calculated in 2026

The 2026 rule is straightforward: take wages subject to Social Security tax and multiply by 0.062. That is your normal OASDI withholding for the pay period.

There is one limit that matters a lot: the 2026 Social Security wage base is $184,500. Once your year-to-date wages with one employer hit that number, OASDI usually stops. Medicare does not stop there, which is why your paycheck gets bigger but not dramatically bigger.

Here is what the math looks like at common pay levels. Biweekly assumes 26 paychecks a year.

Your W-4 does not control this line. A lot of people assume every tax-looking deduction changes when they update a W-4, but OASDI is different. Federal withholding can swing a lot. OASDI is normally much more mechanical.

How to check the OASDI math on your pay stub

You only need two numbers from your pay stub to do a fast check: gross pay for the period and the OASDI amount.

Use this quick formula:

• Expected OASDI ≈ gross pay × 0.062

Example: if your gross pay is $2,769.23 biweekly, the expected OASDI is about $171.69. Small rounding differences are normal. A big miss is worth asking about.

Also look at the year-to-date section of your pay stub. If your YTD Social Security wages are already close to $184,500, your next paycheck may show a partial OASDI amount, then drop to $0 after that.

And if you are trying to understand your total take-home, not just one line item, run your full paycheck through state calculators too. The OASDI rule is nationwide, but income tax differences between California and Texas can easily matter more than the payroll label.

When OASDI stops — or looks wrong

The most normal reason OASDI disappears is that you hit the wage base. That is good news, not a payroll bug. High earners often notice a bigger paycheck late in the year for exactly this reason.

The most common reason OASDI looks too high is multiple employers. If you switched jobs or worked two jobs in the same year, each employer may withhold OASDI as if it is your only employer. That can create an overpayment, and you may have to sort it out when you file your tax return.

The most common reason OASDI looks too low is classification or payroll setup. Some visa categories, campus jobs, or employer mistakes can affect whether Social Security tax applies. For example, some F-1 students in a qualifying nonresident period can have different FICA treatment than a regular W-2 worker.

How to put this to work

1. Find the label. Look for OASDI, Social Security, or FICA-SS on your pay stub. Treat them as the same starting point unless payroll tells you otherwise.

2. Do the 30-second math check. Multiply gross pay by 0.062. If your number is far off, ask payroll what wage base they used for the calculation.

3. Watch the yearly limit. If your wages may exceed $184,500 in 2026, expect one of three things late in the year: normal OASDI, one partial OASDI paycheck, then $0 after the cap is reached.