There is no federal time limit on how long a union can work without a contract. When a collective bargaining agreement expires and a new one is not yet in place, employees keep working under essentially the same terms while the union and employer continue negotiating. Some bargaining units go months or years past expiration. What changes during that gap is not whether people keep their jobs, but which protections carry over, which disappear, and which economic weapons come back into play.
What Stays the Same After Expiration
Once a contract expires without a successor, the employer has to maintain the “status quo” on all mandatory subjects of bargaining. The rule comes from the Supreme Court’s 1962 decision in NLRB v. Katz, which held that an employer’s unilateral change to working conditions under negotiation violates the duty to bargain, even without proof of bad faith.1Justia Law. Labor Board v. Katz, 369 U.S. 736 (1962)
In practice, that means the employer keeps paying the same wages, keeps the same schedules, and keeps providing the same health insurance and other benefits that existed under the expired contract. Pension and annuity contributions continue at the rates the old agreement set; an employer that stops making them is enriching itself with money that should be going into benefit funds.
The NLRB tightened this standard in its 2023 Wendt Corporation decision, ruling that employers cannot justify discretionary changes during a contract gap by pointing to “past practice.” The Board found that approach inconsistent with Katz and harmful to the bargaining process.2National Labor Relations Board. Board Revises Standard on Employers’ Duty to Bargain Before Changing Terms and Conditions of Work
Union dues deductions from paychecks also survive expiration. In its 2022 Valley Hospital Medical Center decision, the NLRB held that an employer may not unilaterally stop honoring a dues-checkoff arrangement when the contract ends. The deductions must continue until either a new agreement is reached or a valid bargaining impasse allows the employer to act on its own.3National Labor Relations Board. NLRB Rules Employers May Not Unilaterally Stop Union Dues Checkoff When Labor Contracts End
What Ends When the Contract Ends
Not everything carries over. Terms that govern the relationship between the union and the employer as institutions, rather than day-to-day working conditions, generally expire with the contract. These are permissive subjects, and the employer has no obligation to continue honoring them.
The most consequential losses:
- No-strike and no-lockout clauses. During the contract term, both sides traded away these weapons. After expiration, the union regains the right to call a strike and the employer regains the right to lock workers out.
- Union security clauses. Requirements that employees join the union or pay fees as a condition of employment end with the contract, so employees can no longer be compelled to maintain membership.
- Arbitration clauses. The formal grievance-and-arbitration process established by the contract generally ceases. The Supreme Court’s Nolde Brothers decision created a presumption that disputes involving rights that vested or accrued during the contract’s life may still be arbitrable, but federal circuits have split on how far that presumption reaches.
The end of arbitration is where workers usually feel the gap most. Without a functioning grievance procedure, disputes over discipline, scheduling, and workload become harder to resolve quickly. The union can file unfair labor practice charges with the NLRB, but that route is slower than contract arbitration.
Both Sides Still Have to Bargain in Good Faith
Throughout the gap, both sides must continue bargaining in good faith. Section 8(d) of the National Labor Relations Act defines this as the mutual obligation to meet at reasonable times and genuinely work toward an agreement on wages, hours, and other employment terms. The law does not force either party to accept any particular proposal or make any specific concession.4Office of the Law Revision Counsel. 29 U.S. Code 158 – Unfair Labor Practices
What it does prohibit is conduct showing a party is not seriously trying. Refusing to meet, canceling sessions repeatedly, showing up unprepared, or engaging in “surface bargaining” all violate the duty. The NLRB investigates charges of bad faith bargaining and can order the offending party to stop and return to the table.5National Labor Relations Board. Employer/Union Rights and Obligations
A bad faith finding has a further consequence. An employer that bargains in bad faith and then tries to declare impasse to push through its preferred terms will not have that impasse recognized as valid. The whole strategy collapses.
When Talks Reach Impasse
Impasse occurs when both sides have bargained in good faith but are genuinely deadlocked, with no reasonable expectation that more talks will break the stalemate. It is a high bar. A simple disagreement or a few tough sessions does not qualify. The NLRB looks at the length of negotiations, the number of sessions, the significance of the unresolved issues, and the good faith each side demonstrated.6National Labor Relations Board. Bargaining in Good Faith with Employees’ Union Representative (Section 8(d) and 8(a)(5))
Once a valid impasse exists, the employer gains a significant tool: the right to unilaterally implement the terms of its last offer to the union. The implemented terms have to match what the employer actually proposed at the table. Impasse is not a license to impose terms more favorable than what was on offer during negotiations.
There is a further limit. The NLRB has held that an employer cannot implement a proposal giving it unlimited discretion over future pay increases, because that would effectively cut the union out of wage bargaining going forward. Implemented terms have to be specific and defined.
Impasse is not necessarily permanent. If circumstances change, new proposals appear, or either side signals willingness to move, the impasse breaks and the obligation to bargain before making changes snaps back into place.
Strikes, Lockouts, and Replacement Workers
Once the contract has expired and any required notice periods have passed, both sides have access to economic weapons, but the risks are not symmetrical.
A strike called to push for better contract terms, such as higher wages or improved benefits, is an economic strike. Economic strikers remain employees and cannot be fired, but the employer can hire permanent replacements to fill their positions. A permanently replaced economic striker is entitled to reinstatement only when a position becomes available, and only after making an unconditional offer to return.7National Labor Relations Board. The Right to Strike
That permanent-replacement risk is the single biggest reason many unions keep working without a contract rather than walking out. A strike over economics is a gamble, and if the employer fills the jobs, striking workers may wait a long time to get back in.
The calculation shifts when the strike protests an employer’s unfair labor practice, such as bad faith bargaining or illegal unilateral changes. Unfair labor practice strikers cannot be permanently replaced. When the strike ends, they are entitled to their jobs back, even if replacements have to be let go.7National Labor Relations Board. The Right to Strike
The employer’s counterpart is the lockout. A lockout is lawful when it serves a legitimate bargaining purpose, but it cannot be used to advance an illegal objective, such as forcing acceptance of terms implemented without a valid impasse.6National Labor Relations Board. Bargaining in Good Faith with Employees’ Union Representative (Section 8(d) and 8(a)(5))
Decertification Risk Grows in the Gap
Working without a contract also opens a door many unions dread. While a collective bargaining agreement is in effect, employees can only petition to remove their union during a narrow 30-day window running from 90 to 60 days before the contract expires (120 to 90 days for healthcare institutions).8National Labor Relations Board. Decertification Election
Once the contract expires, that restriction disappears. A decertification petition can be filed at any time. At least 30 percent of the bargaining unit must sign for the NLRB to schedule an election. A long gap without a new deal can fuel dissatisfaction, which gives unions an incentive to settle and, in some cases, gives employers an incentive to stall.8National Labor Relations Board. Decertification Election
The Pay Freeze and Retroactive Pay
One of the sharpest realities of working without a contract is the frozen paycheck. Wages continue at whatever rate the expired contract set, but they do not go up. If the union was bargaining for a raise, workers go without it for as long as negotiations last.
Nothing in the law requires the new contract to include retroactive pay for the gap. Whether workers get made whole depends entirely on what the union negotiates. Retroactive pay is one of the most common provisions in successor agreements in practice, because unions push hard for it and employers often concede to close a deal. When retroactive pay is awarded, federal wage regulations require the increase be applied to overtime as well. A worker who receives a retroactive raise of a given amount per hour is owed one and a half times that additional amount for every overtime hour worked in the covered period.9eCFR. 29 CFR 778.303 – Retroactive Pay Increases
The longer the gap runs, the more money is at stake in the retroactivity question, and the more expensive a settlement covering the full gap becomes for the employer. Both sides feel that pressure. It is ultimately what pushes most negotiations to a conclusion, even though the law itself sets no deadline for reaching one.