Quick answer: side hustle profit of $400 or more a year is subject to self-employment tax of 15.3 percent on 92.35 percent of your net earnings, which funds Social Security and Medicare. That income also earns Social Security credits: in 2026 you get one credit for each $1,890 of earnings, up to four a year. If you already collect retirement benefits and are younger than full retirement age, earnings above $24,480 in 2026 lead the Social Security Administration (SSA) to withhold $1 for every $2 over the limit, but those benefits are not lost; your monthly payment is recalculated upward at full retirement age.
When you work for an employer, Social Security happens in the background. Tax comes out of each paycheck, your employer pays a matching share and your earnings are reported automatically. With a side hustle, you are both employee and employer, so you handle the tax, the reporting and the record checking yourself.
This guide explains how self-employment income connects to Social Security, what it means for your future benefits and how it affects people who are already collecting. It is part of our larger side hustle ideas guide, which covers choosing and starting a side business.
Sources: Social Security Administration, 2026 Cost-of-Living Adjustment Fact Sheet (tax rates, taxable maximum, quarter of coverage and earnings test amounts); SSA FAQ on working while receiving retirement benefits; SSA Publication 05-10022, Working While Disabled, and Publication 05-10069, How Work Affects Your Benefits; SSA FAQ on earning credits; IRS Topic No. 554, Self-Employment Tax; Instructions for Schedule SE (Form 1040). Checked October 2026. General information, not tax or benefits advice.
How Self-Employment Tax Works
Employees pay 7.65 percent of wages for Social Security and Medicare, and their employer pays another 7.65 percent. Self-employed people pay both halves, for a total of 15.3 percent. That breaks down into 12.4 percent for Social Security and 2.9 percent for Medicare.
The $400 Threshold
According to the IRS, you owe self-employment tax and must file Schedule SE if your net earnings from self-employment are $400 or more for the year. Net earnings means profit after business expenses, not gross sales.
The 92.35 Percent Adjustment
Self-employment tax is not figured on your full profit. Schedule SE first multiplies net profit by 92.35 percent, which mirrors the fact that employees do not pay tax on their employer’s share. Then the 15.3 percent rate applies.
Here is a quick example for a side hustle with $10,000 of net profit:
- $10,000 x 92.35% = $9,235 of net earnings from self-employment
- $9,235 x 15.3% = about $1,413 of self-employment tax
You can then deduct half of the self-employment tax, about $707 in this example, as an adjustment to income on your Form 1040. That lowers your income tax, though not the self-employment tax itself.
How Your Day Job Interacts With the Cap
The 12.4 percent Social Security portion applies only up to a yearly limit called the taxable maximum. For 2026 it is $184,500. Wages from your job count toward that limit first. If your salary is already above $184,500, your side hustle profit owes only the 2.9 percent Medicare portion. If your salary is below it, side hustle earnings fill the gap.
The Medicare portion has no cap. Higher earners also owe an additional 0.9 percent Medicare tax on earnings above $200,000 for single filers or $250,000 for married couples filing jointly.
Since no employer withholds this tax from side hustle income, most people pay it through quarterly estimated tax payments or by raising the withholding at their day job. Our guide to using W-4 withholding for side hustle taxes explains the second approach.
Side Hustle Income Earns Social Security Credits
Self-employment tax is not just a cost. It also builds your Social Security record.
Credits in 2026
SSA awards credits based on yearly earnings. In 2026 you earn one credit for each $1,890 of covered earnings, up to four credits per year. That means $7,560 of combined wages and net self-employment earnings in 2026 earns the full four credits.
Most people need 40 credits, roughly 10 years of work, to qualify for retirement benefits. Credits also matter for disability and survivor benefits, which have their own requirements based on age.
Why This Matters for Some Side Hustlers
For people with a full-time job, credits are usually not an issue because wages already earn four per year. Side hustle earnings can make a difference for:
- Parents who left paid employment to raise children and run a small business from home.
- Workers between jobs who are building income on their own.
- Anyone close to 40 credits who needs a few more quarters.
Higher Earnings Can Raise Future Benefits
Retirement benefits are based on your highest 35 years of indexed earnings. Years with zero or low earnings pull the average down. Side hustle profit added to a low-earning year can replace a lower year in that calculation and lead to a slightly higher benefit.
The Optional Method
Schedule SE includes an optional method that lets some self-employed people with low profits report a set amount of earnings, which can help them earn credits. The rules are narrow and the method raises your self-employment tax, so check the Schedule SE instructions or ask a tax professional before using it.
Working While You Collect Retirement Benefits
Many retirees start side hustles, and the Social Security earnings test is the rule to understand.
The 2026 Earnings Limits
| Situation in 2026 | Annual limit | Benefit reduction |
|---|---|---|
| Younger than full retirement age all year | $24,480 ($2,040 a month) | $1 withheld for every $2 above the limit |
| Reaching full retirement age in 2026 | $65,160 ($5,430 a month), counting only months before full retirement age | $1 withheld for every $3 above the limit |
| At or above full retirement age | No limit | No reduction |
Full retirement age is 67 for people born in 1960 or later. It is between 66 and 67 for people born from 1955 through 1959.
How SSA Counts Self-Employment Income
For the earnings test, SSA counts your net earnings from self-employment, not gross receipts. Profit is generally counted for the tax year, so careful expense records matter.
In your first year of retirement, a special monthly rule can apply. SSA may pay a full benefit for any month you do not perform substantial services in self-employment. Publication 05-10069 explains that working more than 45 hours a month in your business is generally considered substantial, and that fewer than 15 hours a month is generally not. Between those numbers, SSA looks at the type of work and other factors.
Withheld Benefits Are Not Lost
This is the part many people miss. When SSA withholds benefits because of the earnings test, it later recalculates your monthly benefit at full retirement age to credit you for the months benefits were withheld. Over time, you can recover much of the amount withheld.
Reporting Your Estimated Earnings
SSA asks beneficiaries who work to estimate their earnings for the year and to update that estimate if it changes. Reporting early helps avoid an overpayment that you would have to repay later. You can report changes through your my Social Security account, by phone or at a local office.
Side Hustles and Disability Benefits
People who receive Social Security Disability Insurance (SSDI) or Supplemental Security Income (SSI) face different and stricter rules. Self-employment can affect eligibility and payments, and SSA evaluates the value of your work, not just your profit.
Work incentive programs, such as the trial work period, may let you test a side business while keeping benefits for a time. Because the rules are detailed, read SSA’s Working While Disabled publication and contact SSA or a benefits counselor through the Ticket to Work program before starting.
Married Couples Who Run a Side Hustle Together
If spouses run a side business together, how it is reported affects whose Social Security record gets the credit. When only one spouse reports all of the profit on Schedule C and Schedule SE, only that spouse builds earnings and credits from the business.
The IRS allows a married couple that jointly owns and operates an unincorporated business, and files a joint return, to elect treatment as a qualified joint venture. Each spouse then files a separate Schedule C and Schedule SE for their share of income and expenses. That way, both spouses earn Social Security credit for their work. In community property states, special rules apply, so check the IRS guidance on husband and wife businesses or ask a tax professional.
LLCs and S Corporations
A single-member LLC is treated like a sole proprietorship for federal tax purposes by default, so its profit is subject to self-employment tax in the same way.
An S corporation works differently. Owners who work in the business are paid a salary, which is subject to regular payroll taxes, and may also take distributions, which are not subject to Social Security and Medicare taxes. The IRS requires that the salary be reasonable for the work performed. Because payroll and extra tax filings add cost and complexity, an S corporation election usually makes sense only once a side hustle earns a steady, meaningful profit. Lower reported wages can also mean lower future Social Security benefits.
Common Mistakes to Avoid
Forgetting Self-Employment Tax in Your Budget
Many new side hustlers set aside money for income tax but not for the 15.3 percent self-employment tax, then face a bigger bill than expected.
Not Filing Because Income Was Small
If net earnings reach $400, Schedule SE is required even if you owe little or no income tax. Not filing also means those earnings never reach your Social Security record.
Underestimating Earnings While Collecting Benefits
Retirees who start a side hustle and do not update their earnings estimate with SSA may receive an overpayment notice later.
Check Your Earnings Record
Your future benefit depends on SSA having an accurate record of what you earned. Self-employment earnings reach SSA through the Schedule SE you file with your tax return.
- Create or sign in to your my Social Security account at ssa.gov.
- Review your earnings history year by year.
- Compare each year with your tax returns, including Schedule SE.
- If a year is missing or wrong, contact SSA with copies of your returns.
Errors are easier to fix when they are recent, so a yearly check is a good habit. If you run your side hustle through Schedule C, our guide to filling out Schedule C explains how profit flows to Schedule SE.
Planning for Retirement Beyond Social Security
Social Security was designed to replace part of your earnings, not all of it. Side hustle profit also opens the door to self-employed retirement accounts, such as a Solo 401(k) or a SEP IRA, which can be used alongside a workplace plan. Our comparison of Solo 401(k) vs SEP IRA covers the 2026 limits and rules.
Frequently Asked Questions
Do I pay Social Security tax on side hustle income?
Yes, if your net earnings from self-employment are $400 or more for the year. You pay self-employment tax of 15.3 percent on 92.35 percent of net earnings, reported on Schedule SE.
Does side hustle income count toward Social Security credits?
Yes. In 2026 you earn one credit for each $1,890 of covered earnings, including net self-employment earnings, up to four credits a year.
How much can I earn from a side hustle while collecting Social Security?
If you are younger than full retirement age all year, the 2026 limit is $24,480. SSA withholds $1 for every $2 above it. In the year you reach full retirement age, the limit is $65,160 with $1 withheld for every $3 above it.
Do I get withheld Social Security benefits back?
SSA recalculates your benefit at full retirement age to account for months when benefits were withheld, which raises your future monthly payments.
Does my day job salary affect self-employment tax?
Yes. Wages count first toward the 2026 Social Security taxable maximum of $184,500. If your wages are above it, your side hustle profit owes only the Medicare portion of self-employment tax.