A union dues deduction is money your employer takes from each paycheck and sends to your union on your behalf. It comes out after taxes, so every dollar of dues lowers your take-home pay by a full dollar, and it only happens if you've authorized it.
The deduction itself is simple, but the amount can change with your pay, and your stub may show more than one union line. Here's how it works and what to check.
How the Union Dues Deduction Works
Most unions collect dues through payroll deduction, often called "dues checkoff." You sign an authorization card or form, your employer deducts the amount set by the union, and the employer forwards the money to the union, usually each pay period or each month.
The authorization matters. Employers generally can't deduct dues without your written consent, and the form often describes how and when you can revoke it. If you want to stop or change the deduction, your authorization form and your union contract are the places to look first. Those terms vary from one union and contract to the next.
Right-to-work rules
In states with right-to-work laws, private-sector employees can't be required to pay union dues or fees as a condition of keeping their job. Public-sector employees nationwide also can't be required to pay them, following the Supreme Court's 2018 decision in Janus v. AFSCME. In other settings, a union contract may require members or covered employees to pay dues or a fee. If you're unsure which rules apply to you, ask your union representative or check with your state labor department.
What You Might See on Your Pay Stub
Union deductions can show up as one line or several:
- Regular dues: the ongoing membership amount, labeled "UNION DUES," "DUES" or the local's name or number.
- Initiation fee: a one-time fee when you join, sometimes spread over several paychecks.
- Assessments: extra amounts approved by the union for a specific purpose, such as a strike fund or building fund.
- Political or voluntary funds: separate contributions you choose to make, which usually need their own authorization.
Dues are set in one of a few ways: a flat amount per pay period or month, a percentage of your pay, a multiple of your hourly rate (for example, a certain number of hours' pay per month), or a mix. If your dues are a percentage, they'll go up when you get a raise and may change in weeks with overtime. Our guide on how to read your pay stub explains where after-tax deductions appear.
Why Union Dues Come Out After Tax
Union dues are not a pre-tax benefit. Your employer calculates federal income tax, Social Security, Medicare and any state and local taxes on your full gross pay, and then subtracts dues from what's left. That's different from deductions like a traditional 401(k) or health premiums, which reduce your taxable wages first. The pre-tax vs. after-tax deductions guide covers the difference.
Can you deduct dues on your tax return?
Under current federal law, most employees can't deduct union dues on their federal income tax return. Some states have their own deduction or credit for union dues. Because the rules differ by state and can change, check your state's tax instructions or ask a tax professional before counting on a deduction.
Worked Example: Weekly Dues in Michigan
Take a union worker in Michigan earning $32 an hour for 40 hours a week, paid weekly, married filing jointly. Their regular dues are $18 per week. Here's the estimate from our paycheck calculator:
| Per weekly paycheck | Without dues | With $18 dues |
|---|---|---|
| Gross pay | $1,280.00 | $1,280.00 |
| Federal income tax | $69.75 | $69.75 |
| Social Security | $79.36 | $79.36 |
| Medicare | $18.56 | $18.56 |
| Michigan income tax | $44.76 | $44.76 |
| Union dues (after-tax) | $0.00 | $18.00 |
| Net pay | $1,067.57 | $1,049.57 |
Every tax line stays the same, and net pay drops by exactly the $18 in dues. Over 52 weeks, that's $936 a year. If this worker lived in Detroit or another Michigan city with its own income tax, a local tax line would also appear; the Michigan paycheck calculator lets you add a local rate. These are estimates; your actual withholding may differ slightly.
How to Check Your Dues Are Right
- Find your dues rate. Your local's bylaws, contract or membership materials should state the rate and how it's calculated.
- Match it to your stub. For a flat rate, the amount should be the same each period. For a percentage, multiply your gross pay (or base pay, if that's what the union uses) by the rate.
- Watch the timing. Monthly dues may be taken from only one paycheck a month, or split across paychecks. In months with an extra payday, the pattern can look different.
- Check the YTD column. The year-to-date total helps you spot a missed or doubled deduction.
- Raise problems early. Contact payroll for deduction errors and your union for rate questions. Our guide to spotting and fixing paycheck errors walks through the process.
If you change jobs within the same union, or move to a position covered by a different local, confirm the new deduction starts correctly and the old one stops.
Union Dues vs. Other After-Tax Deductions
Union dues sit alongside other after-tax items like supplemental life insurance, Roth 401(k) contributions and charitable giving. They're voluntary in the sense that they require your authorization, which separates them from mandatory deductions such as taxes or a court-ordered wage garnishment. To see how all your deductions fit together, the common voluntary deductions guide gives a full overview.
Frequently Asked Questions
Are union dues taken before or after taxes?
After. Taxes are calculated on your full gross pay, and dues are subtracted from what remains.
Can I stop my union dues deduction?
It depends on your authorization form, your contract and the law in your state and sector. Many authorizations allow revocation only during a set window, so read the form and ask your union or payroll.
Why did my union dues go up?
If your dues are a percentage of pay, a raise or extra hours will increase them. The union may also change its rate or add an assessment, which it should announce to members.
Do union dues show up on my W-2?
Some employers report dues paid in an informational box on the W-2, but practice varies. Your final pay stub of the year will show the year-to-date total either way.
Sources
- IRS Publication 15 (Circular E), Employer's Tax Guide
- U.S. Department of Labor: Fair Labor Standards Act
- Tax Foundation: State Individual Income Tax Rates and Brackets, 2026
Run the numbers for your state
Written and checked against IRS, Social Security Administration and state tax agency publications for the 2026 tax year. General information, not tax, legal or financial advice. Read our editorial policy, calculation methodology and sources.