The NBA Second Apron, Explained
The NBA second apron is a spending threshold in the 2023 CBA that sharply restricts how the league's biggest-spending teams can trade and sign players.
The NBA second apron is a payroll threshold, set well above the luxury-tax line, that triggers the harshest roster-building penalties written into the league’s collective bargaining agreement. Introduced in the 2023 CBA, it functions as a de facto hard salary cap: once a team’s payroll crosses the second apron, it loses nearly every mechanism other franchises use to add players. For the 2025-26 season the second apron was set at $207.824 million, roughly $20 million above the tax line, and it is the point at which spending stops buying flexibility and starts costing a team its ability to build.
Per NBA.com and Wikipedia, thresholds for the 2025-26 season.
How it works
The NBA does not use a single hard cap. It uses a ladder of thresholds, and each rung a team climbs strips away more of its roster-building tools. The second apron is the top rung. On June 30, 2025, the league set the 2025-26 levels as follows.
| Threshold | 2025-26 level | What it does |
|---|---|---|
| Salary cap | $154.647M | Soft cap; teams may exceed it using exceptions |
| Luxury tax | $187.895M | Payrolls above it owe an escalating tax |
| First apron | $195.945M | Removes the full mid-level and sign-and-trade tools |
| Second apron | $207.824M | Removes almost all remaining flexibility |
A team whose team salary sits above the second apron faces a stacked set of restrictions, per the NBA’s CBA as summarized by NBC Sports Boston. It cannot use any mid-level exception to sign a free agent, including the smaller taxpayer version available to first-apron teams. It cannot combine, or aggregate, two or more players’ salaries in a single trade to match a larger incoming contract. It cannot take back more money than it sends out in any trade, erasing the salary-matching cushion that lower-spending teams enjoy. It cannot send cash to another team in a trade, cannot use a traded-player exception generated in a prior season, and cannot acquire a player through a sign-and-trade.
The penalties then reach into the future. A second-apron team’s first-round pick seven years out is frozen and cannot be traded. If a team stays above the second apron in three of any five seasons, that frozen pick is automatically moved to the end of the first round, regardless of the team’s record. That last provision is the sharpest deterrent in the entire structure: it converts sustained heavy spending into a guaranteed loss of draft value.
Where it came from
The second apron was created in the collective bargaining agreement that the NBA and the National Basketball Players Association ratified in the spring of 2023 and that took effect on July 1, 2023. Owners had pushed for a firmer ceiling on the very top of the spending scale, arguing that the previous system let the wealthiest franchises simply pay through the luxury tax to keep expensive rosters together indefinitely.
The mechanism itself is an inflation-adjusted line. Per Wikipedia’s summary of the CBA, the second apron was initially expected to sit about $17.5 million above the luxury-tax line for the 2023-24 season, and it rises each year by the same percentage as the salary cap. The restrictions phased in rather than arriving all at once: the core trade and exception limits applied from the 2023-24 season, while the multi-year pick penalty began counting seasons afterward, so the first teams could not be pushed to the back of the draft until they had accumulated enough seasons over the line.
Why it matters
The second apron changed team-building from a question of ownership’s willingness to pay into a question of what the rules physically allow. Its clearest test case arrived in the offseason following a championship. The Boston Celtics beat the Dallas Mavericks in Game 5 of the 2024 NBA Finals on June 17, 2024, then kept their core intact through the following season. That roster carried a combined salary-and-tax obligation reported to approach $500 million, driven largely by second-apron penalties, according to Boston.com.
Rather than pay it, Boston dismantled the group. The Celtics agreed to send Jrue Holiday to the Portland Trail Blazers on June 23, 2025, and agreed to trade Kristaps Porziņģis to the Atlanta Hawks the next day in a three-team deal that was made official on July 7, 2025. The two moves dropped the franchise below the second apron and, per CBS Boston, shed roughly $180 million in luxury taxes. Boston president of basketball operations Brad Stevens pointed directly at the second apron as the reason a title team was broken apart, telling reporters the rule left the front office little choice. It was the defining illustration of the apron’s purpose: a defending champion trading away rotation players not because they had declined, but because the CBA made keeping them prohibitive.
The arguments
Supporters frame the second apron as the league’s strongest tool for competitive balance. Commissioner Adam Silver has defended the structure repeatedly, arguing that it prevents the richest franchises from hoarding talent and puts all 30 teams in a position to compete, per CBS Sports. In that view, forcing constant roster turnover at the top spreads star players across more markets and keeps more fan bases within reach of contention.
Critics — including executives of contending teams, player agents, and voices within the union — counter that the apron operates as a hard cap that punishes success rather than mismanagement. Their argument is that a well-built, well-drafted roster is now penalized for staying together, that continuity is treated as a liability, and that fans of a champion can lose that champion to an accounting line rather than to on-court decline. The Celtics’ 2025 breakup is cited by both sides: proof of balance by design to supporters, proof of a rule that dismantles great teams to detractors.
Positions per CBS Sports and NBC Sports Boston.
The bottom line
The NBA second apron is the point where spending stops being a matter of ownership’s checkbook and becomes a matter of what the rulebook permits. Built into the 2023 CBA and pegged at $207.824 million for the 2025-26 season, it strips a team of the mid-level exception, salary aggregation, sign-and-trades, cash in deals, and eventually its own first-round pick. Whether it is read as the guarantor of a more balanced league or as a tax on excellence, its effect is not in dispute: as the Celtics demonstrated in the summer of 2025, the second apron can force even a reigning champion to take itself apart.