OASDI stands for Old-Age, Survivors, and Disability Insurance. It is a Social Security program that provides retirement, disability, and survivor benefits to eligible people and families. Workers help fund the program through OASDI tax, which employers usually take from their paychecks.
In 2027, employees generally pay 6.2% of their Social Security-taxable wages, up to the annual limit of $192,300. Employers pay another 6.2% separately.
This guide explains what OASDI is, why it appears on your paycheck, how much you pay, and how the tax works.
Key Takeaways
- OASDI stands for Old-Age, Survivors, and Disability Insurance. It provides benefits to eligible retired workers, disabled workers, and surviving family members.
- OASDI tax is the Social Security part of FICA payroll taxes. It is separate from Medicare tax and income tax.
- The 2027 OASDI tax rate is 6.2% for employees and 6.2% for employers, making a combined rate of 12.4%.
- The 2027 Social Security wage base is $192,300. The maximum employee OASDI contribution is $11,922.60.
- Self-employed workers generally pay the combined 12.4% Social Security tax rate under separate self-employment tax rules.
- Most covered workers must pay OASDI tax, but some employment types qualify for exemptions or special rules.
What Does OASDI Stand For?
OASDI means Old-Age, Survivors, and Disability Insurance. It is the official name of the Social Security insurance program. The program gives monthly benefits to eligible people who retire, become disabled, or lose a family member who qualified for coverage.
The program has three main parts. Old-age insurance supports eligible retired workers. Survivors insurance helps certain family members when a covered worker dies. Disability insurance provides income support to workers who meet the program’s disability and work requirements.
Employees and employers pay into this program through Social Security payroll taxes. These payments help fund current benefits and support the insurance system.
OASDI is not a personal savings account. The tax you pay does not go into an account that holds only your money. Your future benefits depend on factors such as your work record, covered earnings, age, and eligibility.
What Is OASDI Tax on Your Paycheck?
OASDI tax is a payroll deduction that helps pay for Social Security benefits. When you receive your wages, your employer usually takes the employee’s share from your pay. Your employer then pays its own share as well.
You may see different names for this deduction on your pay stub. Common labels include OASDI, Social Security tax, FICA-SS, and Fed OASDI/EE. They usually refer to the Social Security part of your payroll taxes.
What Is Fed OASDI/EE?
Fed OASDI/EE is a label used by some payroll systems for the employee’s Social Security tax deduction. The letters EE mean employee. This amount is withheld from wages that are subject to Social Security tax.
For example, an employee earns $2,000 in Social Security-taxable wages during one pay period. At the standard 6.2% rate, the employer deducts $124 for OASDI.
The deduction reduces the worker’s take-home pay. However, the employer also pays a separate $124 contribution. That employer payment does not come out of the employee’s wages.
To understand the full amount you receive after taxes and other deductions, read our guide on gross pay vs. net pay.
How Does OASDI Tax Work?
The OASDI tax is shared between most employees and their employers. The employer calculates the tax on covered wages and takes the employee’s portion from each paycheck. The employer also owes a matching amount based on those wages.
The tax does not apply to unlimited earnings. Each year has a Social Security wage base, which sets the maximum amount of wages subject to OASDI tax. Once an employee reaches that limit with the same employer, additional covered wages from that employer are generally no longer subject to OASDI tax for the rest of the year.
The limit starts again with the new tax year. This means an employee who reaches the wage limit in one year will normally begin paying OASDI tax again in January.
The tax is based on Social Security-taxable wages, which are not always the same as total gross earnings. Some payroll benefits and payments can have different tax treatment. Employers must identify the correct taxable amount before calculating the deduction.
Self-employed workers follow a different payment process. Instead of having an employer withhold the tax, they generally report and pay it through their tax filing process.
What Are the OASDI Tax Rates and Limits for 2027?
The 2027 OASDI tax rate is 6.2% for employees and 6.2% for employers. The combined rate is 12.4%. Self-employed workers generally pay the combined Social Security rate under the rules that apply to their net earnings.
The 2027 OASDI wage base limit is $192,300. This means only the first $192,300 of covered annual earnings is subject to the Social Security portion of payroll tax. These figures are confirmed in the official 2027 contribution and benefit limits.
OASDI Tax Rates for 2027
| OASDI Tax Detail | 2027 Amount |
| Employee Social Security tax rate | 6.2% |
| Employer Social Security tax rate | 6.2% |
| Combined Social Security tax rate | 12.4% |
| Self-employed Social Security tax rate | 12.4% |
| Maximum taxable annual earnings | $192,300 |
| Maximum employee OASDI contribution | $11,922.60 |
| Maximum employer OASDI contribution | $11,922.60 |
For example, if an employee earns $192,300 or more in covered wages during 2027, the maximum standard employee OASDI tax for that year is $11,922.60.
The employer must also pay the same maximum amount for that employee under the standard rules.
What Changed From 2026 to 2027?
The standard OASDI rate remains the same in 2027. However, the annual wage limit has increased. Workers with higher earnings may therefore pay more Social Security tax during the year.
| Tax Detail | 2026 | 2027 |
| Employee tax rate | 6.2% | 6.2% |
| Employer tax rate | 6.2% | 6.2% |
| Annual taxable wage limit | $184,500 | $192,300 |
| Maximum employee tax | $11,439.00 | $11,922.60 |
The wage limit increased by $7,800, while the maximum employee contribution increased by $483.60. These figures apply to the Social Security portion of payroll tax, not the Medicare portion.
Why Does the OASDI Wage Base Change?
The taxable wage base is adjusted using changes in average wages. When wages rise over time, the annual amount of earnings subject to the tax can also increase.
This adjustment helps keep the tax system linked to changes in worker pay. However, an increase in the wage base does not mean the tax percentage has increased.
For 2027, the employee rate remains 6.2%, even though the maximum taxable earnings amount is higher.
How to Calculate OASDI Tax in 2027
To calculate OASDI withholding, multiply the employee’s Social Security-taxable wages by 6.2%. However, the calculation must also account for the annual wage base.
The basic formula is:
Employee OASDI tax = Social Security-taxable wages × 6.2%
This formula applies only to wages that remain within the annual taxable limit.
Example 1: OASDI Tax on a $5,000 Paycheck
Suppose an employee earns $5,000 in Social Security-taxable wages during one pay period. The employee has not reached the annual wage limit, so the full $5,000 is subject to OASDI tax.
| Calculation | Amount |
| Taxable wages | $5,000 |
| Employee OASDI rate | 6.2% |
| Employee OASDI tax | $310 |
| Employer OASDI contribution | $310 |
| Combined contribution | $620 |
The employee pays $310 through payroll withholding. The employer pays another $310 separately.
The $310 employee deduction reduces take-home pay, along with other applicable taxes and deductions.
Example 2: Maximum OASDI Contribution for 2027
Suppose an employee earns $210,000 in Social Security-taxable wages during 2027. The employee does not pay OASDI tax on the full amount because the annual wage base is $192,300.
The calculation is:
$192,300 × 6.2% = $11,922.60
The employee’s maximum standard OASDI contribution is $11,922.60 for the year. The remaining $17,700 is above the Social Security wage base.
Other payroll taxes may still apply to earnings above this limit.
Example 3: When OASDI Withholding Stops
An employee has already earned $190,000 in covered wages during 2027. Their next paycheck includes another $5,000 in Social Security-taxable wages.
Only $2,300 remains before the employee reaches the annual limit of $192,300.
The OASDI tax for that pay period is:
$2,300 × 6.2% = $142.60
The remaining $2,700 of that paycheck is not subject to additional OASDI withholding by that employer. The employee generally will not have more OASDI tax withheld by the same employer for the rest of 2027.
This example assumes ordinary employment and no special payroll adjustments.
OASDI vs. FICA vs. Medicare: What’s the Difference?
OASDI, FICA, and Medicare are closely related, but they do not mean the same thing. OASDI is the Social Security part of FICA taxes, while Medicare is the other main part.
FICA stands for Federal Insurance Contributions Act. Under the standard rules, employees pay a combined 7.65% in Social Security and Medicare taxes on wages subject to both taxes and still within the Social Security wage limit.
OASDI vs. Medicare Tax
| Feature | OASDI | Medicare |
| Main purpose | Funds retirement, disability, and survivor benefits | Helps fund Medicare |
| Employee tax rate | 6.2% | 1.45% |
| Employer tax rate | 6.2% | 1.45% |
| Combined standard rate | 12.4% | 2.9% |
| 2027 wage limit | $192,300 | No general wage limit |
| Tax after wage limit | Generally stops with the same employer | Continues on covered wages |
Medicare tax has no general wage cap. This means an employee may stop paying OASDI after reaching the annual limit but continue paying Medicare tax.
Some higher earners must also pay an extra 0.9% Medicare tax on wages above the applicable threshold. Employers do not pay a matching share of that extra tax.
Is OASDI the Same as Social Security Tax?
Yes. OASDI tax and Social Security tax normally refer to the same payroll tax. OASDI is the name of the insurance program, while Social Security tax describes the money collected to help fund it.
You may see either term on a paycheck. Some payroll systems use OASDI, while others use Social Security or FICA-SS.
However, FICA is a wider term because it includes both Social Security and Medicare taxes. These amounts may appear separately on a pay stub.
Who Pays OASDI Tax?
Most people with covered employment pay OASDI tax on their eligible wages. However, the way the tax is paid depends on whether someone works for an employer or works for themselves.
Employees
Employees generally pay 6.2% of their Social Security-taxable wages. The employer takes this amount from each paycheck and reports it through the payroll process.
The deduction applies to salaried and hourly workers whose jobs are covered. Part-time workers can also pay OASDI tax, even when they work fewer hours.
Employees should check their pay stubs to understand how much was withheld during each pay period.
Employers
Employers generally pay another 6.2% on covered employee wages. This is called the employer OASDI contribution or employer matching contribution.
For example, when an employee owes $62 in OASDI tax on $1,000 of taxable wages, the employer generally owes another $62.
The employer’s share is a business payroll cost. It is not an extra deduction from the employee’s wages.
Self-Employed Workers
Self-employed workers generally pay both shares of Social Security tax. Their combined self-employment Social Security tax rate is 12.4%.
They also generally pay a 2.9% Medicare portion, making the standard combined self-employment tax rate 15.3%, before any applicable adjustments or extra Medicare tax.
This does not mean they multiply all business revenue by 15.3%. The calculation usually starts with net business earnings and follows special rules for finding the amount subject to tax.
For example, a freelancer with $50,000 in business revenue and $10,000 in allowed business expenses has $40,000 in net profit. The tax calculation then applies the required self-employment adjustments to that profit.
Self-employed workers may also qualify for a deduction related to part of their self-employment tax. This deduction does not remove the tax itself.
Who Is Exempt From OASDI Tax?
Most workers in covered jobs must pay Social Security tax, but some jobs and employment arrangements qualify for exemptions. These rules depend on the type of work, the employer, and the worker’s legal tax status.
Certain students who work for the school they attend may qualify for an exemption. Some government workers covered by other retirement plans may also have different Social Security tax treatment.
Special rules may apply to some nonresident workers, certain religious groups, and workers covered by railroad retirement arrangements.
However, a worker does not become exempt simply because they study, work part-time, receive retirement benefits, or have a particular job title.
For example, a student who works at a local store may owe OASDI tax even when another student working for a qualifying school does not.
The conditions are different for each exemption. Workers and employers should check the applicable rules before removing a payroll deduction.
What Benefits Does OASDI Provide?
OASDI benefits provide income support to eligible workers and certain family members. The program has three main forms of protection: retirement benefits, disability benefits, and survivor benefits.
The amount a person receives depends on several factors. These can include their covered earnings, work history, age, and the rules for the benefit they claim.
Retirement Benefits
Social Security retirement benefits provide monthly payments to eligible people after they reach the required age and meet the work rules.
Most workers earn Social Security credits through covered employment. The program uses those credits to help decide whether a worker qualifies for benefits.
A worker can earn up to four credits in a year. In 2027, one credit requires $1,970 in covered earnings, while four credits require $7,880.
Many workers need 40 credits to qualify for retirement benefits. However, the number of credits alone does not determine how much money they will receive.
The monthly payment also depends on their earnings history and the age at which they start receiving benefits.
Disability Benefits
OASDI disability benefits may provide monthly income to workers who cannot perform substantial work because of a qualifying disability.
A worker must meet both medical and work-related requirements. The program considers how serious the condition is and whether it meets the required disability rules.
The number of work credits needed can depend on the worker’s age and when they became disabled.
Paying OASDI tax does not automatically mean every illness or injury qualifies for disability benefits. The program uses specific eligibility standards.
Survivor Benefits
Survivor benefits may support certain family members after a covered worker dies. Eligible people can include surviving spouses, dependent children, and some other family members.
The rules depend on the survivor’s relationship to the worker and other eligibility conditions. For example, the requirements for a surviving spouse may differ from those for a dependent child.
A worker may qualify their family for some survivor protection with fewer work credits than are needed for retirement benefits.
These benefits can help replace part of the income lost when a family member dies.
Do OASDI Contributions Guarantee Benefits?
Paying OASDI tax helps build a worker’s covered earnings record, but it does not guarantee every type of benefit.
Workers must still meet the requirements for the benefit they want to receive. Retirement, disability, and survivor benefits follow different eligibility rules.
The amount of tax paid in one year is also not the same as the future monthly benefit amount. Benefits depend on the program’s calculation rules and the worker’s earnings history.
Can You Get an OASDI Tax Refund?
You may be able to recover excess Social Security withholding if too much OASDI tax was taken from your wages. However, a refund is not available simply because you do not expect to receive Social Security benefits.
One common reason for excess withholding is working for more than one employer during the same year.
OASDI Overpayment With Multiple Employers
Each employer generally applies the annual wage limit to the wages it pays. If you change jobs or have two jobs, each employer may withhold Social Security tax without knowing how much the other employer has already withheld.
Suppose you earn $120,000 from one employer and $100,000 from another during 2027. Both employers withhold OASDI tax on the wages they pay.
Your combined covered wages are $220,000, which is above the $192,300 annual limit.
The total employee withholding may therefore exceed the maximum amount allowed for the year.
In this situation, you may be able to claim a credit for the excess amount through your tax return.
What If One Employer Withholds Too Much?
If a single employer takes more OASDI tax than required, the employer should generally correct the mistake.
The employee should contact payroll, explain the issue, and ask for a review. The employer may need to correct payroll records or issue updated tax documents.
Employees should keep copies of their pay stubs and annual wage statements when checking for excess withholding.
Common OASDI Payroll Problems and How to Fix Them
An OASDI deduction can sometimes look too high, too low, or missing from a paycheck. This does not always mean the payroll calculation is wrong.
The amount can change because of taxable wage differences, annual wage limits, payroll adjustments, or an error in employee records.
OASDI Deduction Looks Too High
Start by checking the wages used to calculate the tax. The amount may be different from the gross pay shown on the statement.
Next, multiply the Social Security-taxable wages by 6.2%. Compare the result with the OASDI deduction on your pay stub.
If the numbers still do not match, ask the payroll team to explain the difference. There may be an adjustment or an error that needs review.
OASDI Is Missing From Your Paycheck
A missing deduction can have several causes. You may have reached the annual wage base, your job may qualify for special treatment, or payroll may have applied the wrong tax details.
Check your year-to-date taxable wages and earlier statements before assuming the amount is incorrect.
If you have not reached the wage limit and do not know why the deduction is missing, contact payroll. Missing withholding can create reporting and payment issues that need correction.
OASDI Withholding Continues After the Wage Limit
An employee who reaches the annual wage limit with one employer should generally stop having OASDI tax withheld on additional covered wages from that employer for the rest of the year.
If withholding continues, check whether the year-to-date wages have been recorded correctly.
Remember that having multiple employers changes the situation because each employer generally applies the wage limit separately.
How to Check Your OASDI Deduction
Employees can follow a simple process to review the deduction:
- Find the OASDI or Social Security tax line on the pay stub.
- Check the wages subject to Social Security tax.
- Calculate 6.2% of the wages still within the annual limit.
- Compare the result with the amount withheld.
- Review year-to-date wages and tax totals.
- Contact payroll if the figures do not match.
Employees should also check other deductions when reviewing their paycheck. A change in gross and net pay may come from several taxes or benefits, not OASDI alone.
How Employers Can Manage OASDI Withholding Accurately
Employers must use the correct Social Security tax rate and wage limit when processing payroll. They also need accurate wage records to calculate employee deductions and their own matching contributions.
Payroll teams should review employee tax details, taxable wages, and year-to-date earnings before finalizing each pay run. They should also update their payroll settings when annual limits change.
Keeping clear records makes it easier to find mistakes and answer employee questions about paycheck deductions.
Employers can use HavernHR Payroll to manage payroll runs using connected employee records, attendance, and approved pay changes. The platform also supports payroll reviews, payslips, and audit trails. Employers should separately confirm that their payroll setup meets the tax rules that apply to their workers.
Frequently Asked Questions
Is OASDI Tax Mandatory?
Most workers in covered employment must pay OASDI tax on their Social Security-taxable wages. Some employment arrangements qualify for specific exemptions, but workers cannot normally choose to stop paying the tax. Employers must review the applicable requirements before treating wages as exempt.
Why Did OASDI Stop Coming Out of My Paycheck?
OASDI withholding generally stops when your Social Security-taxable wages reach the annual limit with the same employer. The limit is $192,300 for 2027. If you have not reached that amount, ask payroll whether an exemption, adjustment, or mistake explains the missing deduction.
Is OASDI a Federal Income Tax?
No. OASDI is a payroll tax that helps fund Social Security benefits. Federal income tax is a separate tax with different calculation rules. Both may appear on your paycheck, but they serve different purposes.
Does Paying OASDI Tax Increase Retirement Benefits?
Your covered earnings help determine future Social Security benefits. However, paying more tax does not always lead to a matching increase in monthly benefits. The program uses your earnings history, benefit rules, and retirement age to calculate payments.
Is OASDI Deducted Every Pay Period?
OASDI is normally withheld each pay period when an employee receives wages subject to Social Security tax. The amount depends on taxable wages and the remaining annual wage limit. Withholding generally starts again when a new tax year begins.
Can You Get OASDI Tax Back If You Leave Your Job?
Leaving a job does not normally make past OASDI taxes refundable. However, workers who paid excess tax or qualified for an exemption may have a correction or refund option. The reason for the overpayment determines which process applies.
Conclusion
OASDI helps fund retirement, disability, and survivor benefits through payroll taxes. In 2027, employees generally pay 6.2% of Social Security-taxable wages up to the $192,300 annual limit.
Understanding this deduction helps employees check their pay stubs and spot possible mistakes. Employers also need accurate wage records, current tax rates, and clear payroll processes to handle withholding correctly.
For both employees and payroll teams, reviewing OASDI amounts regularly can help prevent errors and keep pay records accurate.