Leaving a union and rejoining later is legal for private-sector workers under federal labor law, and most unions accept former members back through a reinstatement process. What the decision actually costs you depends on three things: whether your state has a right-to-work law, whether you time your dues-checkoff revocation correctly, and what reinstatement fees or back dues your local charges when you return.
Your Right to Resign
Section 7 of the National Labor Relations Act gives every private-sector employee the right to “refrain from any or all” union activities, membership included.1Office of the Law Revision Counsel. 29 USC Chapter 7, Subchapter II – National Labor Relations No union can force you to stay, and no employer can fire you for leaving.
The Supreme Court reinforced this in Pattern Makers’ League v. NLRB (1985), striking down a union rule that barred resignations during a strike. Unions cannot restrict the right to resign through constitution, bylaw, or vote.2Justia U.S. Supreme Court Center. Pattern Makers v. NLRB, 473 U.S. 95 (1985) Once your resignation is effective, the union cannot fine you for conduct that follows, though it can still fine you for conduct that occurred while you were a member.
What You’ll Still Pay After Resigning
Resigning ends your membership. It does not always end your payments. Which category you fall into depends on your employer and your state.
Public-sector workers. If you work for a state or local government, you owe nothing after resigning. In Janus v. AFSCME (2018), the Supreme Court held that forcing public-sector employees to pay any union fees without their affirmative consent violates the First Amendment, and that consent must be “freely given” and supported by “clear and compelling” evidence.3Justia U.S. Supreme Court Center. Janus v. AFSCME, 585 U.S. (2018) If a public-sector union keeps deducting fees after you resign, that deduction is illegal absent your explicit written consent.
Private-sector workers in right-to-work states. Twenty-six states have right-to-work laws, authorized under Section 14(b) of the NLRA, which lets states ban agreements that require union membership or fee payments as a condition of employment.4Office of the Law Revision Counsel. 29 U.S. Code 164 – Construction of Provisions Once you resign in one of these states, you owe nothing: no dues, no financial core fees, no agency fees. The union still bargains on your behalf because it represents the entire bargaining unit.
Private-sector workers in other states. If your contract contains a union security clause, you’ll still owe a reduced fee after resigning. Communications Workers v. Beck (1988) held that a union cannot spend non-member fees on activities unrelated to collective bargaining.5Cornell Law Institute. Communications Workers v. Beck, 487 U.S. 735 Moving to this “financial core” status strips out political spending, lobbying, organizing at other workplaces, and social activities. The reduced fee is often 20% to 50% less than full dues, though the exact amount varies by local. Check your collective bargaining agreement for the union security clause before you resign so you know what to expect.
What You Give Up, and What You Keep
Non-members lose several benefits of membership:
- Voting on contract ratification, strike authorization, and union leadership elections
- Running for steward, officer, or delegate positions
- Strike-fund payments during a work stoppage, where the local maintains one
- Union-sponsored scholarships, legal aid, or discounted services restricted to dues-paying members
What you keep matters just as much. The union has a legal duty of fair representation to every worker in the bargaining unit, member or not.6National Labor Relations Board. Right to Fair Representation Your wages, benefits, and working conditions under the collective bargaining agreement stay the same. The union must process your grievances without discrimination. For most people, losing the vote on the next contract is the biggest practical cost.
How to Resign Cleanly
Write a brief letter stating your name, employee ID, the date, and your intent to resign from the union effective immediately. If you want financial core status rather than to stop paying entirely, say so explicitly. Address the letter to the recording secretary or financial secretary of your local; the contact information is in the bylaws or on the union’s website.
Send it by certified mail with return receipt requested. A phone call or verbal request won’t protect you if a dispute later arises about when you resigned, and that date controls what conduct the union can still fine you for.
Stopping Dues Deductions
Resigning and stopping payroll deductions are two separate steps. Dues will keep coming out of your paycheck until you also revoke the dues-checkoff authorization you signed when you joined. Send a separate written revocation to your employer’s payroll or HR department the same day you mail your resignation letter.
Watch the timing. Many checkoff authorizations include an irrevocability clause that locks you in for one year from the date you signed, with a narrow escape window of 30 to 45 days before each annual anniversary. Federal law under the Labor Management Relations Act requires that employees get a chance to revoke after one year or when the collective bargaining agreement expires, whichever comes first, but it permits those narrow windows in between. Miss the window and you may keep paying until the next one opens. Pull out the form you signed and find the exact dates before you send anything.
Religious Objectors
Workers with sincere religious objections to supporting a union financially have a separate path under Title VII of the Civil Rights Act. Instead of paying dues or agency fees, you can request that an equivalent amount go to a nonreligious, non-labor charity. Start with a written notice to your employer and union explaining the belief and proposing the redirect. If either refuses to accommodate, you can file a charge with the EEOC.
Rejoining Later
Coming back is usually less dramatic than leaving, but it involves more friction than the original sign-up. The local needs to reconcile your old records and resolve any outstanding obligations before it can put you back on the rolls.
Fees and Back Dues
Expect a reinstatement fee. The amount is set in each union’s bylaws and varies widely: some locals charge as little as $20 plus back dues for each month of delinquency, others charge several hundred dollars. If you left with unpaid dues, most unions will require you to settle that balance before processing your application. Ask your local’s financial secretary for the current fee schedule before you submit anything, since bylaw amendments change these numbers.
The Application
Submit a written application to your shop steward or directly to the local union hall. You’ll typically need your previous membership dates, current job classification, and employee identification number so the union can match your application to old records. Many locals require an executive board vote to approve readmissions, which can add a few weeks to the timeline. Once approved, you’ll sign a new dues-checkoff authorization, and deductions resume within one or two pay cycles.
Can the Union Refuse?
Section 8(b)(1)(A) of the NLRA preserves a union’s right to “prescribe its own rules with respect to the acquisition or retention of membership.”7Office of the Law Revision Counsel. 29 U.S. Code 158 – Unfair Labor Practices A union can, in principle, reject a former member’s application. What it cannot do is use readmission denials to retaliate against workers who exercised their Section 7 rights. If you resigned lawfully and the union blocks your return as punishment for leaving, that crosses into an unfair labor practice, and you can file a charge with the NLRB.
Seniority and Pension When You Return
Rejoining doesn’t automatically reset the clock on what you built before leaving, but it doesn’t automatically preserve it either. The answers come from your plan documents and your collective bargaining agreement, not from a single national rule.
Pension Vesting
Many union pension plans use a “break in service” framework. If you left covered employment before vesting and stayed away too long, you risk forfeiting the service credits you had accumulated. Return before a forfeiture triggers and eventually vest, and your earlier years of covered employment typically count toward your benefit. Every plan defines “too long” differently. Request a benefit statement from the plan’s trust office before assuming your old credits survived.
Workplace Seniority
Seniority for layoff, recall, and job bidding is governed by the collective bargaining agreement, not by membership status. In many contracts, seniority keeps accruing as long as you remain employed in the bargaining unit, even as a non-member. Leaving the employer entirely and returning later is different: some contracts restore seniority on recall from layoff, others start you fresh. Read the seniority article of your CBA before you resign if seniority-based protections matter to your job security.